ip route-static dest-address { mask | mask-length } { next-hop-address [ track track-entry-number ] | interface-type interface-number [ next-hop-address ] } [ preference preference-value ] [ tag tag-value ] [ description description-text ]

undo ip route-static dest-address { mask | mask-length } [ next-hop-address | interface-type interface-number [ next-hop-address ] ] [ preference preference-value ]

View

System view

Parameters

dest-address: Destination IP address of the static route, in dotted decimal notation.

mask: Mast of the IP address, in dotted decimal notation.

mask-length: Mask length, in the range 0 to 32.

next-hop-address: IP address of the next hop, in dotted decimal notation.

interface-type interface-number: Specifies the output interface by its type and number. If the output interface is a broadcast interface, such as an Ethernet interface, a virtual template or a VLAN interface, the next hop address must be specified.

preference preference-value : Specifies the preference of the static route, which is in the range of 1 to 255 and defaults to 60.

tag tag-value: Sets a tag value for the static route from 1 to 4294967295. The default is 0. Tags of routes are used in routing policies to control routing.

description description-text: Configures a description for the static route, which consists of 1 to 60 characters, including special characters like space, but excluding “?”.

track track-entry-number: Associates the static route with a track entry. Use the track-entry-number argument to specify a track entry number, in the range 1 to 1024.

Description

Use the ip route-static command to configure a unicast static route.

Use the undo ip route-static command to delete a unicast static route.

When configuring a unicast static route, note that:

1) If the destination IP address and the mask are both 0.0.0.0, the configured route is a default route. If routing table searching fails, the router will use the default route for packet forwarding.

2) Different route management policies can be implemented for different route preference configurations. For example, specifying the same preference for different routes to the same destination address enables load sharing, while specifying different preferences for these routes enables route backup.

3) When configuring a static route, you can specify the output interface or the next hop address based on the actual requirement. Note that the next hop address must not be the IP address of the local interface; otherwise, the route configuration will not take effect. For interfaces that support network address to link layer address resolution or point-to-point interfaces, you can specify the output interface or next hop address. When specifying the output interface, note that:

l For a NULL 0 interface, if the output interface has already been configured, there is no need to configure the next hop address.

l It is not recommended to specify a broadcast interface (such as VLAN interface) as the output interface for a static route, because a broadcast interface may have multiple next hops. If you have to do so, you must specify the corresponding next hop of the interface at the same time.

Related commands: display ip routing-table, ip route-static default-preference.

& Note:

l The static route does not take effect if you specify its next hop address first and then configure the address as the IP address of a local interface, such as VLAN interface.

l To configure track monitoring for an existing static route, simply associate the static route with a track entry. For a non-existent static route, configure it and associate it with a Track entry.

l If a static route needs route recursion, the associated track entry must monitor the nexthop of the recursive route instead of that of the static route; otherwise, a valid route may be mistakenly considered invalid.

Examples

# Configure a static route, whose destination address is 1.1.1.1/24, next hop address is 2.2.2.2, tag value is 45, and description information is for internet & intranet.

<Sysname> system-view

[Sysname] ip route-static 1.1.1.1 24 2.2.2.2 tag 45 description for internet & intranet

1.1.3 ip route-static default-preference

Syntax

ip route-static default-preference default-preference-value

undo ip route-static default-preference

View

System view

Parameters

default-preference-value: Default preference for static routes, which is in the range of 1 to 255.

Description

Use the ip route-static default-preference command to configure the default preference for static routes.

Use the undo ip route-static default-preference command to restore the default.

By default, the default preference of static routes is 60.

Note that:

l If no preference is specified when configuring a static route, the default preference is used.

l When the default preference is re-configured, it applies to newly added static routes only.

Related commands: display ip routing-table, ip route-static.

Examples

# Set the default preference of static routes to 120.

<Sysname> system-view

[Sysname] ip route-static default-preference 120

Chapter 2 RIP Configuration Commands

& Note:

l The term “router” in this document refers to a router in a generic sense or a Layer 3 switch.

l The S5500-EI series only support single RIP process.

2.1 RIP Configuration Commands

2.1.1 checkzero

Syntax

checkzero

undo checkzero

View

RIP view

Parameters

None

Description

Use the checkzero command to enable the zero field check on RIPv1 messages.

Use the undo checkzero command to disable the zero field check.

The zero field check is enabled by default.

After the zero field check is enabled, the router discards RIPv1 messages in which zero fields are non-zero. If all messages are trusty, you can disable this feature to spare the processing time of the CPU.

Examples

# Disable the zero field check on RIPv1 messages for RIP process 100.

<Sysname> system-view

[Sysname] rip 100

[Sysname-rip-100] undo checkzero

2.1.2 default cost

Syntax

default cost value

undo default cost

View

RIP view

Parameters

value: Default metric of redistributed routes, in the range of 0 to 16.

Description

Use the default cost command to configure the default metric for redistributed routes.

Use the undo default cost command to restore the default.

By default, the default metric of redistributed routes is 0.

When you use the import-route command to redistribute routes from other protocols without specifying a metric, the metric specified by the default cost command applies.

Related command: import-route.

Examples

# Set the default metric for redistributed routes to 3.

<Sysname> system-view

[Sysname] rip 100

[Sysname-rip-100] default cost 3

2.1.3 default-route originate

Syntax

default-route originate cost value

undo default-route originate

View

RIP view

Parameters

value: Cost of the default route, in the range of 1 to 15.

Description

Use the default-route originate cost command to advertise a default route with the specified metric to RIP neighbors.

Use the undo default-route originate command to disable the sending of a default route.

By default, no default route is sent to RIP neighbors.

The RIP router with this feature configured will not receive any default routes from RIP neighbors.

Examples

# Send a default route with a metric of 2 to RIP neighbors.

<Sysname> system-view

[Sysname] rip 100

[Sysname-rip-100] default-route originate cost 2

# Disable default route sending.

[Sysname-rip-100] undo default-route originate

2.1.4 display rip

Syntax

display rip [ process-id ]

View

Any view

Parameters

process-id: RIP process ID, in the range of 1 to 65535.

Description

Use the display rip command to display the current status and configuration information of the specified RIP process.

If process-id is not specified, information about all configured RIP processes is displayed.

Examples

# Display the current status and configuration information of all configured RIP processes.

<Sysname> display rip

RIP process : 1

RIP version : 1

Preference : 100

Checkzero : Enabled

Default-cost : 0

Summary : Enabled

Hostroutes : Enabled

Maximum number of balanced paths : 4

Update time : 30 sec(s) Timeout time : 180 sec(s)

Suppress time : 120 sec(s) Garbage-collect time : 120 sec(s)

TRIP retransmit time : 5 sec(s)

TRIP response packets retransmit count : 36

Silent interfaces : None

Default routes : Disabled

Verify-source : Enabled

Networks :

192.168.1.0

Configured peers : None

Triggered updates sent : 0

Number of routes changes : 0

Number of replies to queries : 0

Table 2-1 Description on the fields of the display rip command

Field	Description
RIP process	RIP process ID
RIP version	RIP version 1 or 2
Preference	RIP route priority
Checkzero	Indicates whether the zero field check is enabled for RIPv1 messages.
Default-cost	Default cost of the redistributed routes
Summary	Indicates whether the routing summarization is enabled
Hostroutes	Indicates whether to receive host routes
Maximum number of balanced paths	Maximum number of load balanced routes
Update time	RIP update interval
Timeout time	RIP timeout time
Suppress time	RIP suppress interval
Garbage-collect time	RIP garbage collection interval
TRIP retransmit time	TRIP retransmit interval for sending update requests and responses.
TRIP response packets retransmit count	Maximum retransmit times for update requests and responses
Silent interfaces	Number of silent interfaces, which do not periodically send updates
Default routes	Indicates whether a default route is sent to RIP neighbors
Verify-source	Indicates whether the source IP address is checked on the received RIP routing updates
Networks	Networks enabled with RIP
Configured peers	Configured neighbors
Triggered updates sent	Number of sent triggered updates
Number of routes changes	Number of changed routes in the database
Number of replies to queries	Number of RIP responses

2.1.5 display rip database

Syntax

display rip process-id database

View

Any view

Parameters

process-id: RIP process ID, in the range of 1 to 65535.

Description

Use the display rip database command to display the active routes in the RIP database, which are sent in normal RIP routing updates.

Examples

# Display the active routes in the database of RIP process 100.

<Sysname> display rip 100 database

10.0.0.0/8, cost 1, ClassfulSumm

10.0.0.0/24, cost 1, nexthop 10.0.0.1, Rip-interface

11.0.0.0/8, cost 1, ClassfulSumm

11.0.0.0/24, cost 1, nexthop 10.0.0.1, Imported

Table 2-2 Description on fields of the display rip database command

Field	Description
X.X.X.X/X	Destination address and subnet mask
cost	Cost of the route
classful-summ	Indicates the route is a RIP summary route.
Nexthop	Address of the next hop
Rip-interface	Routes learnt from a RIP–enabled interface
imported	Routes redistributed from other routing protocols

2.1.6 display rip interface

Syntax

display rip process-id interface [ interface-type interface-number ]

View

Any view

Parameters

process-id: RIP process ID, in the range of 1 to 65535.

interface-type interface-number: Specifies an interface.

Description

Use the display rip interface command to display the RIP interface information of the RIP process.

If no interface is specified, information about all RIP interfaces of the RIP process is displayed.

Examples

# Display all the interface information of RIP process 1.

<Sysname> display rip 1 interface

Interface-name: Vlan-interface1

Address/Mask:192.168.0.154/24 Version:RIPv1

MetricIn:0 MetricIn route policy:Not designated

MetricOut:1 MetricOut route policy:Not designated

Split-horizon/Poison-reverse:on/off Input/Output:on/on

Current packets number/Maximum packets number:10/2000

Table 2-3 Description on the fields of the display rip interface command

Field	Description
Interface-name	The name of an interface running RIP.
Address/Mask	The IP address and Mask of the interface.
Version	RIP version running on the interface
MetricIn	Additional routing metric added to the incoming routes
MetricIn route policy	Name of the routing policy used to add the additional routing metric for the incoming routes. If no routing policy is referenced, the field displays Not designated.
MetricOut	Additional routing metric added to the outgoing routes
MetricOut route policy	Name of the routing policy used to add the additional routing metric for the outgoing routes. If no routing policy is referenced, the field displays Not designated.
Split-horizon	Indicates whether the split-horizon is enabled (ON: enabled, OFF: disabled).
Poison-reverse	Indicates whether the poison-reverse is enabled (ON: enabled, OFF: disabled)
Input/Output	Indicates if the interface is allowed to receive (Input) or send (Output) RIP messages (on is allowed, off is not allowed).
Current packets number/Maximum packets number	Packets to be sent/Maximum packets that can be sent on the interface

2.1.7 display rip route

Syntax

display rip process-id route [ statistics | ip-address { mask | mask-length } | peer ip-address ]

View

Any view

Parameters

process-id: RIP process ID, in the range of 1 to 65535.

statistics: Displays the route statistics, including total number of routes and number of routes of each neighbor.

ip-address { mask | mask-length }: Displays route information about a specified IP address.

peer ip-address: Displays all routing information learned from a specified neighbor.

Description

Use the display rip route command to display the routing information of a specified RIP process.

Examples

# Display all routing information of RIP process 1.

<Sysname> display rip 1 route

Route Flags: R-RIP, T-TRIP

P-Permanent, A-Aging, S-Suppressed, G-Garbage-collect

Peer 21.0.0.23 on Vlan-interface1

Destination/Mask NextHop Cost Tag Flags Sec

56.0.0.0/8 21.0.0.23 1 0 RA 102

34.0.0.0/8 21.0.0.23 1 0 RA 23

Peer 21.0.0.12 on Vlan-interface1

Destination/Mask NextHop Cost Tag Flags Sec

56.0.0.0/8 21.0.0.12 1 0 RA 34

12.0.0.0/8 21.0.0.12 1 0 RA 12

# Display routing information for network 56.0.0.0/8 of RIP process 1.

<Sysname> display rip 1 route 56.0.0.0 8

Route Flags: R-RIP, T-TRIP

P-Permanent, A-Aging, S-Suppressed, G-Garbage-collect

Peer 21.0.0.23 on Vlan-interface1

Destination/Mask NextHop Cost Tag Flags Sec

56.0.0.0/8 21.0.0.23 1 0 RA 102

Peer 21.0.0.12 on Vlan-interface1

Destination/Mask NextHop Cost Tag Flags Sec

56.0.0.0/8 21.0.0.12 1 0 RA 34

# Display RIP process1 routing information learned from the specified neighbor.

<Sysname> display rip 1 route peer 21.0.0.23

Route Flags: R-RIP, T-TRIP

P-Permanent, A-Aging, S-Suppressed, G-Garbage-collect

Peer 21.0.0.23 on Vlan-interface1

Destination/Mask NextHop Cost Tag Flags Sec

56.0.0.0/8 21.0.0.23 1 0 RA 102

34.0.0.0/8 21.0.0.23 1 0 RA 23

Table 2-4 Description on the fields of the display rip route command

Field	Description
Route Flags	R — RIP route T — TRIP route P — The route never expires A — The route is aging S — The route is suppressed G — The route is in Garbage-collect state
Peer 21.0.0.23 on Vlan-interface1	Routing information learned on a RIP interface from the specified neighbor
Destination/Mask	Destination IP address and subnet mask
Nexthop	Next hop of the route
Cost	Cost of the route
Tag	Route tag
Flags	Indicates the route state
Sec	Remaining time of the timer corresponding to the route state

# Display the routing statistics of RIP process 1.

<Sysname> display rip 1 route statistics

Peer Aging Permanent Garbage

21.0.0.23 2 0 3

21.0.0.12 2 0 4

Total 4 0 7

Table 2-5 Description on the fields of the display rip route statistics command

Field	Description
Peer	IP address of a neighbor
Aging	Total number of aging routes learned from the specified neighbor
Permanent	Total number of permanent routes learned from the specified neighbor
Garbage	Total number of routes in the garbage-collection state learned from the specified neighbor
Total	Total number of routes learned from all RIP neighbors

2.1.8 filter-policy export

Syntax

filter-policy { acl-number | ip-prefix ip-prefix-name } export [ protocol [ process-id ] | interface-type interface-number ]

undo filter-policy export [ protocol [ process-id ] | interface-type interface-number ]

View

RIP view

Parameters

acl-number: Number of an ACL used to filter outbound routes, in the range of 2000 to 3999.

ip-prefix ip-prefix-name: Name of an IP prefix list used to filter outbound routes, a string of 1 to 19 characters.

protocol: Filters outbound routes redistributed from a specified routing protocol, which can be bgp, direct, isis, ospf, rip, and static.

process-id: Process ID of the specified routing protocol, in the range of 1 to 65535. You need to specify a process ID when the routing protocol is rip, ospf, or isis.

interface-type interface-number: Specifies an interface.

Description

Use the filter-policy export command to configure the filtering of RIP outgoing routes. Only routes not filtered out can be advertised.

Use the undo filter-policy export command to remove the filtering.

By default, RIP does not filter outbound routes.

Note that:

l If protocol is specified, RIP filters only the outgoing routes redistributed from the specified routing protocol. Otherwise, RIP filters all routes to be advertised.

l If interface-type interface-number is specified, RIP filters only the routes advertised by the specified interface. Otherwise, RIP filters routes advertised by all RIP interfaces.

Related commands: acl, import-route, and ip ip-prefix.

Examples

# Reference ACL 2000 to filter outbound routes.

<Sysname> system-view

[Sysname] rip 1

[Sysname-rip-1] filter-policy 2000 export

# Reference IP prefix list abc to filter outbound routes on VLAN-interface 10.

[Sysname-rip-1] filter-policy ip-prefix abc export vlan-interface 10

2.1.9 filter-policy import

Syntax

filter-policy { acl-number | gateway ip-prefix-name | ip-prefix ip-prefix-name [ gateway ip-prefix-name ] } import [ interface-type interface-number ]

undo filter-policy import [ interface-type interface-number ]

View

RIP view

Parameters

acl-number: Number of the Access Control List (ACL) used for filtering incoming routes, in the range of 2000 to 3999.

ip-prefix ip-prefix-name: References an IP prefix list to filter incoming routes. The ip-prefix-name is a string of 1 to 19 characters.

gateway ip-prefix-name: References an IP prefix list to filter routes from the gateway.

interface-type interface-number: Specifies an interface.

Description

Use the filter-policy import command to filter the incoming routes.

Use the undo filter-policy import command to restore the default.

By default, RIP does not filter incoming routes.

Related commands: acl and ip ip-prefix.

Examples

# Reference ACL 2000 to filter incoming routes.

<Sysname> system-view

[Sysname] rip 1

[Sysname-rip-1] filter-policy 2000 import

# Reference IP prefix list abc on VLAN-interface 10 to filter all received RIP routes.

[Sysname-rip-1] filter-policy ip-prefix abc import vlan-interface 10

2.1.10 host-route

Syntax

host-route

undo host-route

View

RIP view

Parameters

None

Description

Use the host-route command to enable host route reception.

Use the undo host-route command to disable host route reception.

By default, receiving host routes is enabled.

In some cases, a router may receive many host routes from the same network segment. These routes are not helpful for routing and occupy a large amount of network resources. You can use the undo host-route command to disable receiving of host routes.

& Note:

RIPv2 can be disabled from receiving host routes, but RIPv1 cannot.

Examples

# Disable RIP from receiving host routes.

<Sysname> system-view

[Sysname] rip 1

[Sysname-rip-1] undo host-route

2.1.11 import-route

Syntax

import-route protocol [ process-id ] [ allow-ibgp ] [ cost cost | route-policy route-policy-name | tag tag ]*

undo import-route protocol [ process-id ]

View

RIP view

Parameters

protocol: Specify a routing protocol from which to redistribute routes, currently including bgp, direct, isis, ospf and static.

process-id: Process number of the routing protocol, in the range of 1 to 65535, used for isis and ospf.

cost: Cost for redistributed routes, in the range of 0 to 16. If cost is not specified, the default cost specified by the default cost command applies.

tag: Tag marking redistributed routes, in the range of 0 to 65,535. The default is 0.

route-policy route-policy-name: Specifies a routing policy with 1 to 19 characters.

allow-ibgp: When the protocol argument is set to bgp, allow-ibgp is an optional keyword. The import-route bgp command only redistributes EBGP routes, while the import-route bgp allow-ibgp command additionally redistributes IBGP routes, which may cause routing loops. Be cautious when using it.

Description

Use the import-route command to enable route redistribution from another routing protocol.

Use the undo import-route command to disable route redistribution.

By default, RIP does not redistribute routes from other routing protocols.

l You can specify a routing policy using keyword route-policy to redistribute only the specified routes.

l You can configure a cost for redistributed routes using keyword cost.

l You can configure a tag value for redistributed routes using keyword tag.

Related commands: default cost.

Examples

# Redistribute static routes, and set the cost to 4.

<Sysname> system-view

[Sysname] rip 1

[Sysname-rip-1] import-route static cost 4

# Set the default cost for redistributed routes to 3.

[Sysname-rip-1] default cost 3

# Redistribute OSPF routes with the cost being the default cost.

[Sysname-rip-1] import-route ospf

2.1.12 maximum load-balancing

Syntax

maximum load-balancing number

undo maximum load-balancing

View

RIP view

Parameters

number: Maximum number of load balanced routes, in the range 1 to 4.

Description

Use the maximum load-balancing command to specify the maximum number of load balanced routes in load sharing mode.

Use the undo maximum load-balancing command to restore the default.

By default, the maximum number of load balanced routes is 4.

Examples

# Specify the maximum number of load balanced routes as 2.

<Sysname> system-view

[Sysname] rip

[Sysname-rip-1] maximum load-balancing 2

2.1.13 network

Syntax

network network-address

undo network network-address

View

RIP view

Parameters

network-address: IP address of a network segment, which can be the IP network address of any interface.

Description

Use the network command to enable RIP on the interface attached to the specified network.

Use the undo network command to disable RIP on the interface attached to the specified network.

RIP runs only on the interfaces attached to the specified network. For an interface not on the specified network, RIP neither receives/sends routes on it nor forwards interface route through it. Therefore, you need to specify the network after enabling RIP to validate RIP on a specific interface.

Use the network 0.0.0.0 command to enable RIP on all interfaces.

RIP is disabled on an interface by default.

Examples

# Enable RIP on the interface attached to the network 129.102.0.0.

<Sysname> system-view

[Sysname] rip 100

[Sysname-rip-100] network 129.102.0.0

2.1.14 peer

Syntax

peer ip-address

undo peer ip-address

View

RIP view

Parameters

ip-address: IP address of a RIP neighbor, in dotted decimal format.

Description

Use the peer command to specify the IP address of a neighbor in the non-broadcast multi-access (NBMA) network, where routing updates destined to the peer are unicast, rather than multicast or broadcast.

Use the undo peer command to remove the IP address of a neighbor.

By default, no neighbor is specified.

Note: you need not use the peer ip-address command when the neighbor is directly connected; otherwise the neighbor may receive both the unicast and multicast (or broadcast) of the same routing information.

Examples

# Specify to send unicast updates to peer 202.38.165.1.

<Sysname> system-view

[Sysname] rip 1

[Sysname-rip-1] peer 202.38.165.1

2.1.15 preference

Syntax

preference [ route-policy route-policy-name ] value

undo preference [ route-policy ]

View

RIP view

Parameters

route-policy-name: Routing policy name with 1 to 19 characters.

value: Priority for RIP route, in the range of 1 to 255. The smaller the value, the higher the priority.

Description

Use the preference command to specify the RIP route priority.

Use the undo preference route-policy command to restore the default.

By default, the priority of RIP route is 100.

You can specify a routing policy using keyword route-policy to set the specified priority to routes matching the routing policy.

l If a priority is set for matched routes in the routing policy, the priority applies to these routes. The priority of other routes is the one set by the preference command.

l If no priority is set for matched routes in the routing policy, the priority of all routes is the one set by the preference command.

Examples

# Set the RIP route priority to 120.

<Sysname> system-view

[Sysname] rip 1

[Sysname-rip-1] preference 120

2.1.16 reset rip statistics

Syntax

reset rip process-id statistics

View

User view

Parameters

process-id: RIP process ID, in the range of 1 to 65535.

Description

Use the reset rip statistics command to clear the statistics of the specified RIP process.

Examples

# Clear statistics in RIP process 100.

<Sysname> reset rip 100 statistics

2.1.17 rip

Syntax

rip [ process-id ]

undo rip [ process-id ]

View

System view

Parameters

process-id: RIP process ID, in the range of 1 to 65535. The default is 1.

Description

Use the rip command to create a RIP process and enter RIP view.

Use the undo rip command to disable a RIP process.

By default, no RIP process runs.

Note that:

l You must enable the RIP process before configuring the global parameters. This limitation is not for configuration of interface parameters.

l The configured interface parameters become invalid after you disable the RIP process.

Examples

# Create a RIP process and enter RIP process view.

<Sysname> system-view

[Sysname] rip

[Sysname-rip-1]

2.1.18 rip authentication-mode

Syntax

rip authentication-mode { md5 { rfc2082 key-string key-id | rfc2453 key-string } | simple password }

undo rip authentication-mode

View

Interface view

Parameters

md5: MD5 authentication mode.

rfc2453: Uses the message format defined in RFC 2453 (IETF standard).

rfc2082: Uses the message format defined in RFC 2082.

key-id: MD5 key number, in the range of 1 to 255.

key-string: MD5 key string with 1 to 16 characters in plain text format, or 24 characters in cipher text format. When the display current-configuration command is used to display system information, a 24-character cipher string is displayed as the MD5 key string.

simple: Plain text authentication mode.

password: Plain text authentication string with 1 to 16 characters.

Description

Use the rip authentication-mode command to configure RIPv2 authentication mode and parameters.

Use the undo rip authentication-mode command to cancel authentication.

Note that the key string you configured can overwrite the old one if there is any.

Related commands: rip version.

Examples

# Configure MD5 authentication on VLAN-interface 10 with the key string being rose in the format defined in RFC 2453.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] rip version 2

[Sysname-Vlan-interface10] rip authentication-mode md5 rfc2453 rose

2.1.19 rip input

Syntax

rip input

undo rip input

View

Interface view

Parameters

None

Description

Use the rip input command to enable the interface to receive RIP messages.

Use the undo rip input command to disable the interface from receiving RIP messages.

By default, an interface is enabled to receive RIP messages.

Related commands: rip output.

Examples

# Disable VLAN-interface 10 from receiving RIP messages.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] undo rip input

2.1.20 rip metricin

Syntax

rip metricin [ route-policy route-policy-name ] value

undo rip metricin

View

Interface view

Parameters

route-policy route-policy-name: Specifies the name of a routing policy used to add an additional metric for the routes matching it. The name is a string of 1 to 19 characters

value: Additional metric added to received routes, in the range of 0 to 16.

Description

Use the rip metricin command to add a metric to the received routes.

Use the undo rip metricin command to restore the default.

By default, the additional metric of a received route is 0.

When a valid RIP route is received, the system adds a metric to it and then installs it into the routing table. Therefore, the metric of routes received on the configured interface is increased.

If a routing policy is referenced with the route-policy keyword:

l Routes matching the policy is added with the metric specified in the apply cost command configured in the policy, while routes not matching it is added with the metric specified in the rip metricout command. Note that, the rip metricout command does not support the + or – keyword (used to add or reduce a metric) specified in the apply cost command. For details about the apply cost command, refer to Routing Policy Commands .

l If the apply cost command is not configured in the policy, all the advertised routes is added with the metric specified in the rip metricout command.

Related commands: rip metricout.

Examples

# Configure VLAN-interface 10 to add a metric of 6 for incoming route 1.0.0.0/8 and to add a metric of 2 for other incoming routes.

<Sysname> system-view

[Sysname] ip ip-prefix 123 permit 1.0.0.0 8

[Sysname] route-policy abc permit node 0

[Sysname-route-policy] if-match ip-prefix 123

[Sysname-route-policy] apply cost 6

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] rip metricin route-policy abc 2

2.1.21 rip metricout

Syntax

rip metricout [ route-policy route-policy-name ] value

undo rip metricout

View

Interface view

Parameters

route-policy route-policy-name: Specifies the name of a routing policy used to add an additional metric for the routes matching it. The name is a string of 1 to 19 characters

value: Additional metric of sent routes, in the range of 1 to 16.

Description

Use the rip metricout command to add a metric to a sent route.

Use the undo rip metricout command to restore the default.

By default, the additional metric for sent routes is 1.

Before a RIP route is sent, a metric will be added to it. Therefore, when the metric is configured on an interface, the metric of RIP routes sent on the interface will be increased.

If a routing policy is referenced with the route-policy keyword:

l If the apply cost command is not configured in the policy, all the advertised routes is added with the metric specified in the rip metricout command.

Related commands: rip metricin.

Examples

# Configure VLAN-interface 10 to add a metric of 6 for the outgoing route 1.0.0.0/8 and to add a metric of 2 for other outgoing routes.

<Sysname> system-view

[Sysname] ip ip-prefix 123 permit 1.0.0.0 8

[Sysname] route-policy abc permit node 0

[Sysname-route-policy] if-match ip-prefix 123

[Sysname-route-policy] apply cost 6

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] rip metricout route-policy abc 2

2.1.22 rip output

Syntax

rip output

undo rip output

View

Interface view

Parameters

None

Description

Use the rip output command to enable the interface to send RIP messages.

Use the undo rip output command to disable the interface from sending RIP messages.

Sending RIP messages is enabled on an interface by default.

Related commands: rip input.

Examples

# Disable VLAN-interface 10 from receiving RIP messages.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] undo rip output

2.1.23 rip poison-reverse

Syntax

rip poison-reverse

undo rip poison-reverse

View

Interface view

Parameters

None

Description

Use the rip poison-reverse command to enable the poison reverse function.

Use the undo rip poison-reverse command to disable the poison reverse function.

By default, the poison reverse function is disabled.

Examples

# Enable the poison reverse function for RIP routing updates on VLAN-interface 10.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] rip poison-reverse

2.1.24 rip split-horizon

Syntax

rip split-horizon

undo rip split-horizon

View

Interface view

Parameters

None

Description

Use the rip split-horizon command to enable the split horizon function.

Use the undo rip split-horizon command to disable the split horizon function.

The split horizon function is enabled by default.

l The split horizon function is necessary for preventing routing loops. Therefore, you are not recommended to disable it.

l In special cases, make sure it is necessary to disable the split horizon function.

& Note:

Only the poison reverse function takes effect if both the split horizon and poison reverse functions are enabled.

Examples

# Enable the split horizon function on VLAN-interface 10.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] rip split-horizon

2.1.25 rip summary-address

Syntax

rip summary-address ip-address { mask | mask-length }

undo rip summary-address ip-address { mask | mask-length }

View

Interface view

Parameters

ip-address: Summary IP address.

mask: Subnet mask in dotted decimal format.

mask-length: Subnet mask length.

Description

Use the rip summary-address command to configure RIPv2 to advertise a summary route through the interface.

Use the undo rip summary-address command to remove the configuration.

Note that the summary address is valid only when the automatic summarization is disabled.

Related commands: summary.

Examples

# Advertise a local summary address on VLAN-interface 10.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] rip summary-address 10.0.0.0 255.255.255.0

2.1.26 rip version

Syntax

rip version { 1 | 2 [ broadcast | multicast ] }

undo rip version

View

Interface view

Parameters

1: RIP version 1.

2: RIP version 2.

broadcast: Sends RIPv2 messages in broadcast mode.

multicast: Sends RIPv2 messages in multicast mode.

Description

Use the rip version command to specify a RIP version for the interface.

Use the undo rip version command to remove the specified RIP version.

By default, no RIP version is configured for an interface, which uses the global RIP version. If the global RIP version is not configured, the interface can only send RIPv1 broadcasts and can receive RIPv1 broadcasts and unicasts, and RIPv2 broadcasts, multicasts and unicasts.

If RIPv2 is specified with no sending mode configured, RIPv2 messages will be sent in multicast mode.

When RIPv1 runs on an interface, the interface will:

l Send RIPv1 broadcast messages

l Receive RIPv1 broadcast messages

l Receive RIPv1 unicast messages

When RIPv2 runs on the interface in broadcast mode, the interface will:

l Send RIPv2 broadcast messages

l Receive RIPv1 broadcast messages

l Receive RIPv1 unicast messages

l Receive RIPv2 broadcast messages

l Receive RIPv2 multicast messages

l Receive RIPv2 unicast messages

When RIPv2 runs on the interface in multicast mode, the interface will:

l Send RIPv2 multicast messages

l Receive RIPv2 broadcast messages

l Receive RIPv2 multicast messages

l Receive RIPv2 unicast messages

Examples

# Configure VLAN-interface 10 to broadcast RIPv2 messages.

<Sysname> system-view

[Sysname] interface Vlan-interface 10

[Sysname-Vlan-interface10] rip version 2 broadcast

2.1.27 silent-interface

Syntax

silent-interface { all | interface-type interface-number }

undo silent-interface { all | interface-type interface-number }

View

RIP view

Parameters

all: Silents all interfaces.

interface-type interface-number: Specifies an interface by its type and number.

Description

Use the silent-interface command to disable an interface or all interfaces from sending routing updates. That is, the interface only receives but does not send RIP messages.

Use the undo silent-interface command to restore the default.

By default, all interfaces are allowed to send routing updates.

Examples

# Configure all VLAN interfaces to work in the silent state, and activate VLAN-interface 10.

<Sysname> system-view

[Sysname] rip 100

[Sysname-rip-100] silent-interface all

[Sysname-rip-100] undo silent-interface vlan-interface 10

[Sysname-rip-100] network 131.108.0.0

2.1.28 summary

Syntax

summary

undo summary

View

RIP view

Parameters

None

Description

Use the summary command to enable automatic RIPv2 summarization. Natural masks are used to advertise summary routes so as to reduce the size of routing tables.

Use the undo summary command to disable automatic RIPv2 summarization so that all subnet routes can be broadcast.

By default, automatic RIPv2 summarization is enabled.

Enabling automatic RIPv2 summarization can reduce the size of the routing table to enhance the scalability and efficiency of large networks.

Related commands: rip version.

Examples

# Enable RIPv2 automatic summarization.

<Sysname> system-view

[Sysname] rip

[Sysname-rip-1] summary

2.1.29 timers

Syntax

timers { garbage-collect garbage-collect-value | suppress suppress-value | timeout timeout-value | update update-value }*

undo timers { garbage-collect | suppress | timeout | update } *

View

RIP view

Parameters

garbage-collect-value: Garbage-collect timer time in seconds, in the range of 1 to 3600.

suppress-value: Suppress timer time in seconds, in the range of 0 to 3600.

timeout-value: Timeout timer time in seconds, in the range of 1 to 3600.

update-value: Update timer time in seconds, in the range of 1 to 3600.

Description

Use the timers command to configure RIP timers. By adjusting RIP timers, you can improve network performance.

Use the undo timers command to restore the default.

By default, the garbage-collect timer is 120 seconds, the suppress timer 120 seconds, the timeout timer 180 seconds, and the update timer 30 seconds.

RIP is controlled by the above four timers.

l The update timer defines the interval between routing updates.

l The timeout timer defines the route aging time. If no routing update related to a route is received after the aging time, the metric of the route is set to 16 in the routing table.

l The suppress timer defines how long a RIP route stays in the suppressed state. When the metric of a route is 16, the route enters the suppressed state. In the suppressed state, only routes which come from the same neighbor and whose metric is less than 16 will be received by the router to replace unreachable routes.

l The garbage-collect timer defines the interval from when the metric of a route becomes 16 to when it is deleted from the routing table. During the Garbage-Collect timer length, RIP advertises the route with the routing metric set to 16. If no routing update is announced for that route after the Garbage-Collect timer expires, the route will be deleted from the routing table.

Note that:

l Generally, you are not recommended to change the default values of these timers.

l The time lengths of these timers must be kept consistent on all routers and access servers in the network.

Examples

# Specifies the update, timeout, suppress, and garbage-collect timers as 5, 15, 15 and 30 respectively.

<Sysname> system-view

[Sysname] rip 100

[Sysname-rip-100] timers update 5

[Sysname-rip-100] timers timeout 15

[Sysname-rip-100] timers suppress 15

[Sysname-rip-100] timers garbage-collect 30

2.1.30 validate-source-address

Syntax

validate-source-address

undo validate-source-address

View

RIP view

Parameters

None

Description

Use the validate-source-address command to enable the source IP address validation on incoming RIP routing updates.

Use the undo validate-source-address command to disable the source IP address validation.

The source IP address validation is enabled by default.

Generally, disabling the validation is not recommended.

Examples

# Enable the source IP address validation on incoming messages.

<Sysname> system-view

[Sysname-rip] rip 100

[Sysname-rip-100] validate-source-address

2.1.31 version

Syntax

version { 1 | 2 }

undo version

View

RIP view

Parameters

1: Specifies the RIP version as RIPv1.

2: Specifies the RIP version as RIPv2. RIPv2 messages are multicast.

Description

Use the version command to specify a global RIP version.

Use the undo version command to remove the configured global RIP version.

By default, if an interface has a RIP version specified, the RIP version takes effect; if it has no RIP version specified, it can send RIPv1 broadcasts, and receive RIPv1 broadcasts, RIPv1 unicasts, RIPv2 broadcasts, RIPv2 multicasts, and RIPv2 unicasts.

Note that:

l If an interface has an RIP version specified, the RIP version takes precedence over the global RIP version.

l If no RIP version is specified for the interface and the global version is RIPv1, the interface inherits RIPv1, and it can send RIPv1 broadcasts, and receive RIPv1 broadcasts and unicasts.

l If no RIP version is specified for the interface and the global version is RIPv2, the interface operates in the RIPv2 muticast mode, and it can send RIPv2 multicasts, and receive RIPv2 broadcasts, multicasts and unicasts.

Examples

# Specify RIPv2 as the global RIP version.

<Sysname> system-view

[Sysname] rip 100

[Sysname-rip-100] version 2

Chapter 3 OSPF Configuration Commands

3.1 OSPF Configuration Commands

& Note:

The term “router” in this document refers to a router in a generic sense or a Layer 3 switch running routing protocols.

3.1.1 abr-summary

Syntax

abr-summary ip-address { mask | mask-length } [ advertise | not-advertise ] [ cost cost ]

undo abr-summary ip-address { mask | mask-length }

View

OSPF area view

Parameters

ip-address: Destination IP address of the summary route, in dotted decimal format.

mask: Mask of the IP address in dotted decimal format.

mask-length: Mask length, in the range 0 to 32 bits.

advertise | not-advertise: Advertises the summary route or not. By default, the summary route is advertised.

cost cost: Specifies the cost of the summary route, in the range 1 to 16777215. The default cost is the largest cost value among routes that are summarized.

Description

Use the abr-summary command to configure a summary route on the area border router.

Use the undo abr-summary command to remove a summary route.

By default, no route summarization is configured on an ABR.

You can enable advertising the summary route or not, and specify a route cost.

This command is usable only on an ABR. Multiple contiguous networks may be available in an area, where you can summarize them with one network on the ABR for advertisement. The ABR advertises only the summary route to other areas.

With the undo abr-summary command used, summarized routes will be advertised.

Examples

# Summarize networks 36.42.10.0/24 and 36.42.110.0/24 in Area 1 with 36.42.0.0/16.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] area 1

[Sysname-ospf-100-area-0.0.0.1] network 36.42.10.0 0.0.0.255

[Sysname-ospf-100-area-0.0.0.1] network 36.42.110.0 0.0.0.255

[Sysname-ospf-100-area-0.0.0.1] abr-summary 36.42.0.0 255.255.0.0

3.1.2 area

Syntax

area area-id

undo area area-id

View

OSPF view

Parameters

area-id: ID of an area, a decimal integer in the range 0 to 4294967295 that is translated into the IP address format by the system, or an IP address.

Description

Use the area command to create an area and enter area view.

Use the undo area command to remove a specified area.

No OSPF area is created by default.

Examples

# Create Area 0 and enter Area 0 view

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] area 0

[Sysname-ospf-100-area-0.0.0.0]

3.1.3 asbr-summary

Syntax

asbr-summary ip-address { mask | mask-length } [ tag tag | not-advertise | cost cost ]*

undo asbr-summary ip-address { mask | mask-length }

View

OSPF view

Parameters

ip-address: IP address of the summary route in dotted decimal notation.

mask: IP address mask in dotted decimal notation.

mask-length: Mask length, in the range 0 to 32 bits.

not-advertise: Disables advertising the summary route. If the keyword is not specified, the route is advertised.

tag tag: Specifies a tag value for the summary route, used by a route policy to control route advertisement, in the range 0 to 4294967295. The default is 1.

cost cost: Specifies the cost of the summary route, in the range 1 to 16777214. For Type-1 external routes, the cost defaults to the largest cost among routes that are summarized. For Type-2 external routes, the cost defaults to the largest cost among routes that are summarized plus 1.

Description

Use the asbr-summary command to configure a summary route.

Use the undo asbr-summary command to remove a summary route.

No ASBR route summarization is configured by default.

With the asbr-summary command configured on an ASBR, it summarizes redistributed routes that fall into the specified address range with a single route. If the ASBR resides in an NSSA area, it advertises the summary route in a Type-7 LSA into the area.

With the asbr-summary command configured on an NSSA ABR, it summarizes routes described by Type-5 LSAs translated from Type-7 LSAs with a single route and advertises the summary route to other areas. This command does not take effect on non NSSA ABRs.

With the undo asbr-summary command used, summarized routes will be advertised.

Related command: display ospf asbr-summary.

Examples

# Summarize redistributed routes with a single route.

<Sysname> system-view

[Sysname] ip route-static 10.2.1.0 24 null 0

[Sysname] ip route-static 10.2.2.0 24 null 0

[Sysname] ospf 100

[Sysname-ospf-100] import-route static

[Sysname-ospf-100] asbr-summary 10.2.0.0 255.255.0.0 tag 2 cost 100

3.1.4 authentication-mode

Syntax

authentication-mode { simple | md5 }

undo authentication-mode

View

OSPF area view

Parameters

simple: Specifies the simple authentication mode.

md5: Specifies the MD5 ciphertext authentication mode.

Description

Use the authentication-mode command to specify an authentication mode for the OSPF area.

Use the undo authentication-mode command to remove the authentication mode.

By default, no authentication mode is configured for an OSPF area.

Routers that reside in the same area must have the same authentication mode: non-authentication, simple, or MD5.

Related commands: ospf authentication-mode.

Examples

# Specify the MD5 ciphertext authentication mode for OSPF area0.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] area 0

[Sysname-ospf-100-area-0.0.0.0] authentication-mode md5

3.1.5 bandwidth-reference

Syntax

bandwidth-reference value

undo bandwidth-reference

View

OSPF view

Parameters

value: Bandwidth reference value for link cost calculation, in the range 1 to 2147483648 Mbps.

Description

Use the bandwidth-reference command to specify a reference bandwidth value for link cost calculation.

Use the undo bandwidth-reference command to restore the default value.

The default value is 100 Mbps.

When links have no cost values configured, OSPF calculates their cost values: Cost=Reference bandwidth value / Link bandwidth. If the calculated cost is greater than 65535, the value of 65535 is used.

Examples

# Specify the reference bandwidth value as 1000 Mbps.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] bandwidth-reference 1000

3.1.6 default

Syntax

default { cost cost | limit limit | tag tag | type type } *

undo default { cost | limit | tag | type } *

View

OSPF view

Parameters

cost: Specifies the default cost for redistributed routes, in the range 0 to 16777214.

limit: Specifies the default upper limit of routes redistributed per time, in the range 1 to 2147483647.

tag: Specifies the default tag for redistributed routes, in the range 0 to 4294967295.

type: Specifies the default type for redistributed routes: 1 or 2.

Description

Use the default command to configure default parameters for redistributed routes.

Use the undo default command to restore default values.

The cost, route type, tag, and the upper limit are 1, 2, 1 and 1000 by default.

Related commands: import-route.

Examples

# Configure the default cost, upper limit, tag and type as 10, 20000, 100 and 2 respectively for redistributed external routes.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] default cost 10 limit 20000 tag 100 type 2

3.1.7 default-cost

Syntax

default-cost cost

undo default-cost

View

OSPF area view

Parameters

cost: Specifies a cost for the default route advertised to the Stub or NSSA area, in the range 0 to 16777214.

Description

Use the default-cost command to specify a cost for the default route advertised to the stub or NSSA area.

Use the undo default-cost command to restore the default value.

The cost defaults to 1.

This command is only applicable to the ABR of a stub area or the ABR/ASBR of an NSSA area.

Related commands: stub, nssa.

Examples

# Configure Area 1 as a stub area, and specify the cost of the default route advertised to the stub area as 20.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] area 1

[Sysname-ospf-100-area-0.0.0.1] stub

[Sysname-ospf-100-area-0.0.0.1] default-cost 20

3.1.8 default-route-advertise

Syntax

default-route-advertise [ [ always | cost cost | type type | route-policy route-policy-name ] * | summary cost cost ]

undo default-route-advertise

View

OSPF view

Parameters

always: Generates a default external route in an ASE LSA into the OSPF routing domain, if the router has no default route configured. Without this keyword used, you have to configure a default route to distribute it in a Type-5 LSA into the OSPF routing domain.

cost cost: Specifies a cost for the default route, in the range 0 to 16777214. The default is 1.

type type: Specifies a type for the ASE LSA: 1 or 2, which defaults to 2.

route-policy route-policy-name: Specifies a route policy name, a string of 1 to 19 characters. If the default route matches the specified route policy, the route policy modifies some values in the ASE LSA.

summary: Advertises the Type-3 summary LSA of the specified default route.

Description

Use the default-route-advertise command to generate a default route into the OSPF routing domain.

Use the undo default-route-advertise command to disable OSPF from distributing a default external route.

By default, no default route is distributed.

Using the import-route command cannot redistribute a default route. To do so, use the default-route-advertise command. If no default route is configured, use the default-route-advertise always command to generate a default route in a Type-5 LSA.

The default-route-advertise summary cost command is applicable only to VPNs, and the default route is redistributed in a Type-3 LSA. The PE router advertises the redistributed default route to the CE router. Currently, this command is not supported on the switch because the switch does not support VPN.

Related commands: import-route.

Examples

# Generate a default route in an ASE LSA into the OSPF routing domain (no default route configured on the router).

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] default-route-advertise always

3.1.9 description

Syntax

description description

undo description

View

OSPF view/OSPF area view

Parameters

description: Configures a description for the OSPF process in OSPF view, or for the OSPF area in OSPF area view. description is a string of up to 80 characters.

Description

Use the description command to configure a description for an OSPF process or area.

Use the undo description command to remove the description.

No description is configured by default.

Use of this command is only for the identification of an OSPF process or area. The description has no special meaning.

Examples

# Describe the OSPF process 100 as abc.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] description abc

# Describe the OSPF area0 as bone area.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] area 0

[Sysname-ospf-100-area-0.0.0.0] description bone area

3.1.10 display ospf abr-asbr

Syntax

display ospf [ process-id ] abr-asbr

View

Any view

Parameters

process-id: OSPF process ID, in the range 1 to 65535.

Description

Use the display ospf abr-asbr command to display ABR/ASBR information.

If no process is specified, the ABR/ASBR information of all OSPF processes is displayed.

If you use this command on routers in a stub area, no ASBR information is displayed.

Examples

# Display ABR/ASBR information.

<Sysname> display ospf abr-asbr

OSPF Process 1 with Router ID 192.168.1.2

Routing Table to ABR and ASBR

Type Destination Area Cost Nexthop RtType

Inter 3.3.3.3 0.0.0.0 3124 10.1.1.2 ASBR

Intra 2.2.2.2 0.0.0.0 1562 10.1.1.2 ABR

Table 3-1 Description on the fields of the display ospf abr-asbr command

Field	Description
Type	Intra-area router or Inter-area router
Destination	Router ID of an ABR/ASBR
Area	ID of the area of the next hop
Cost	Cost from the router to the ABR/ASBR
Nexthop	Next hop address
RtType	Router type: ABR, ASBR

3.1.11 display ospf asbr-summary

Syntax

display ospf [ process-id ] asbr-summary [ ip-address { mask | mask-length } ]

View

Any view

Parameters

process-id: OSPF process ID, in the range 1 to 65535.

ip-address: IP address, in dotted decimal format.

mask: IP address mask, in dotted decimal format.

mask-length: Mask length, in the range 0 to 32 bits.

Description

Use the display ospf asbr-summary command to display information about the redistributed routes that are summarized.

If no OSPF process is specified, related information of all OSPF processes is displayed.

If no IP address is specified, information about all summarized redistributed routes will be displayed.

Related commands: asbr-summary.

Examples

# Display information about all summarized redistributed routes.

<Sysname> display ospf asbr-summary

OSPF Process 1 with Router ID 2.2.2.2

Summary Addresses

Total Summary Address Count: 1

Summary Address

Net : 30.1.0.0

Mask : 255.255.0.0

Tag : 20

Status : Advertise

Cost : 10 (Configured)

The Count of Route is : 2

Destination Net Mask Proto Process Type Metric

30.1.2.0 255.255.255.0 OSPF 1 2 1

30.1.1.0 255.255.255.0 OSPF 1 2 1

Table 3-2 Description on the fields of the display ospf asbr-summary command

Field	Description
Total Summary Address Count	Total summary route number
Net	The address of the summary route
Mask	The mask of the summary route address
Tag	The tag of the summary route
Status	The advertisement status of the summary route
Cost	The cost to the summary net
The Count of Route	The count of routes that are summarized
Destination	Destination address of a summarized route
Net Mask	Network mask of a summarized route
Proto	Routing protocol
Process	Process ID of routing protocol
Type	Type of a summarized route
Metric	Metric of a summarized route

3.1.12 display ospf brief

Syntax

display ospf [ process-id ] brief

View

Any view

Parameters

process-id: OSPF process ID, in the range 1 to 65535.

Description

Use the display ospf brief command to display OSPF brief information. If no OSPF process is specified, brief information about all OSPF processes is displayed.

Examples

# Display OSPF brief information.

<Sysname> display ospf brief

OSPF Process 1 with Router ID 192.168.1.2

OSPF Protocol Information

RouterID: 192.168.1.2 Border Router: NSSA

Route Tag: 0

Multi-VPN-Instance is not enabled

Applications Supported: MPLS Traffic-Engineering

SPF-schedule-interval: 5 0 5000

LSA generation interval: 5 0 5000

LSA arrival interval: 1000

Default ASE Parameter: Metric: 1 Tag: 1 Type: 2

Route Preference: 10

ASE Route Preference: 150

SPF Computation Count: 22

RFC 1583 Compatible

Graceful restart interval: 120

Area Count: 1 Nssa Area Count: 1

ExChange/Loading Neighbors: 0

Area: 0.0.0.1 (MPLS TE not enabled)

Authtype: None Area flag: NSSA

SPF Scheduled Count: 5

ExChange/Loading Neighbors: 0

Interface: 192.168.1.2 (Vlan-interface1)

Cost: 1 State: DR Type: Broadcast MTU: 1500

Priority: 1

Designated Router: 192.168.1.2

Backup Designated Router: 192.168.1.1

Timers: Hello 10 , Dead 40 , Poll 40 , Retransmit 5 , Transmit Delay 1

Table 3-3 Description on the fields of the display ospf brief command

Field	Description
RouterID	Router ID
Border Router	ABR, ASBR or NSSA ABR
Route Tag	The tag of redistributed routes
Multi-VPN-Instance is not enabled	The OSPF process does not support multi-VPN-instance.
Applications Supported	Applications supported
SPF-schedule-interval	Interval for SPF calculations
LSA generation interval	LSA generation interval
LSA arrival interval	Minimum LSA repeat arrival interval
Default ASE Parameter	Default ASE Parameters: metric, tag, route type.
Route Preference	Internal route priority
ASE Route Preference	External route priority
SPF Computation count	SPF computation count of the OSPF process
RFC1583 Compatible	Compatible with routing rules defined in RFC1583
Graceful restart interval	GR restart interval
Area Count	Area number of the current process
Nssa Area Count	NSSA area number of the current process
ExChange/Loading Neighbors	Neighbors in ExChange/Loading state
Area	Area ID in the IP address format
Authtype	Authentication type of the area: Non-authentication, simple authentication, or MD5 authentication
Area flag	The type of the area
SPF scheduled Count	SPF calculation count in the OSPF area
Interface	IP address of the interface
Cost	Interface cost
State	Interface state
Type	Interface network type
MTU	Interface MTU
Priority	Router priority
Designated Router	The Designated Router
Backup Designated Router	The Backup Designated Router
Timers	Intervals of timers: hello, dead, poll, retransmit, and transmit delay

3.1.13 display ospf cumulative

Syntax

display ospf [ process-id ] cumulative

View

Any view

Parameters

process-id: OSPF process ID, in the range 1 to 65535.

Description

Use the display ospf cumulative command to display OSPF statistics.

Use of this command is helpful for troubleshooting.

Examples

# Display OSPF statistics.

<Sysname> display ospf cumulative

OSPF Process 1 with Router ID 2.2.2.2

Cumulations

IO Statistics

Type Input Output

Hello 61 122

DB Description 2 3

Link-State Req 1 1

Link-State Update 3 3

Link-State Ack 3 2

LSAs originated by this router

Router: 4

Network: 0

Sum-Net: 0

Sum-Asbr: 0

External: 0

NSSA: 0

Opq-Link: 0

Opq-Area: 0

Opq-As: 0

LSAs Originated: 4 LSAs Received: 7

Routing Table:

Intra Area: 2 Inter Area: 3 ASE/NSSA: 0

Table 3-4 Description on the fields of the display ospf cumulative command

Field	Description
IO statistics	Statistics about input/output packets and LSAs
Type	OSPF packet type
Input	Packets received
Output	Packets sent
Hello	Hell packet
DB Description	Database Description packet
Link-State Req	Link-State Request packet
Link-State Update	Link-State Update packet
Link-State Ack	Link-State Acknowledge packet
LSAs originated by this router	LSAs originated by this router
Router	Type-1 LSA
Network	Type-2 LSA
Sum-Net	Type-3 LSA
Sum-Asbr	Type-4 LSA
External	Type-5 LSA
NSSA	Type-7 LSA
Opq-Link	Type-9 LSA
Opq-Area	Type-10 LSA
Opq-As	Type-11 LSA
LSAs originated	LSAs originated
LSAs Received	LSAs received
Routing Table	Routing table
Intra Area	Intra-area route number
Inter Area	Inter-area route number
ASE	ASE route number

3.1.14 display ospf error

Syntax

display ospf [ process-id ] error

View

Any view

Parameters

process-id: OSPF process ID, in the range 1 to 65535.

Description

Use the display ospf error command to display OSPF error information.

If no process is specified, the OSPF error information of all OSPF processes is displayed.

Examples

# Display OSPF error information.

<Sysname> display ospf error

OSPF Process 1 with Router ID 192.168.80.100

OSPF Packet Error Statistics

0 : OSPF Router ID confusion 0 : OSPF bad packet

0 : OSPF bad version 0 : OSPF bad checksum

0 : OSPF bad area ID 0 : OSPF drop on unnumber interface

0 : OSPF bad virtual link 0 : OSPF bad authentication type

0 : OSPF bad authentication key 0 : OSPF packet too small

0 : OSPF Neighbor state low 0 : OSPF transmit error

0 : OSPF interface down 0 : OSPF unknown neighbor

0 : HELLO: Netmask mismatch 0 : HELLO: Hello timer mismatch

0 : HELLO: Dead timer mismatch 0 : HELLO: Extern option mismatch

0 : HELLO: NBMA neighbor unknown 0 : DD: MTU option mismatch

0 : DD: Unknown LSA type 0 : DD: Extern option mismatch

0 : LS ACK: Bad ack 0 : LS ACK: Unknown LSA type

0 : LS REQ: Empty request 0 : LS REQ: Bad request

0 : LS UPD: LSA checksum bad 0 : LS UPD: Received less recent LSA

0 : LS UPD: Unknown LSA type

Table 3-5 Description on the fields of the display ospf error command

Field	Description
OSPF Router ID confusion	Packets with duplicate route ID
OSPF bad packet	Packets illegal
OSPF bad version	Packets with wrong version
OSPF bad checksum	Packets with wrong checksum
OSPF bad area ID	Packets with invalid area ID
OSPF drop on unnumber interface	Packets dropped on the unnumbered interface
OSPF bad virtual link	Packets on wrong virtual links
OSPF bad authentication type	Packets with invalid authentication type
OSPF bad authentication key	Packets with invalid authentication key
OSPF packet too small	Packets too small in length
OSPF Neighbor state low	Packets received in low neighbor state
OSPF transmit error	Packets with error when being transmitted
OSPF interface down	Shutdown times of the interface
OSPF unknown neighbor	Packets received from unknown neighbors
HELLO: Netmask mismatch	Hello packets with mismatched mask
HELLO: Hello timer mismatch	Hello packets with mismatched hello timer
HELLO: Dead timer mismatch	Hello packets with mismatched dead timer
HELLO: Extern option mismatch	Hello packets with mismatched option field
HELLO: NBMA neighbor unknown	Hello packets received from unknown NBMA neighbors
DD: MTU option mismatch	DD packets with mismatched MTU
DD: Unknown LSA type	DD packets with unknown LSA type
DD: Extern option mismatch	DD packets with mismatched option field
LS ACK: Bad ack	Bad LSAck packets for LSU packets
LS ACK: Unknown LSA type	LSAck packets with unknown LSA type
LS REQ: Empty request	LSR packets with no request information
LS REQ: Bad request	Bad LSR packets
LS UPD: LSA checksum bad	LSU packets with wrong LSA checksum
LS UPD: Received less recent LSA	LSU packets without latest LSA
LS UPD: Unknown LSA type	LSU packets with unknown LSA type

3.1.15 display ospf interface

Syntax

display ospf [ process-id ] interface [ all | interface-type interface-number ]

View

Any view

Parameters

process-id: OSPF process ID, in the range 1 to 65535.

all: Display the OSPF information of all interfaces.

interface-type interface-number: Interface type and interface number.

Description

Use the display ospf interface command to display OSPF interface information.

If no OSPF process is specified, the OSPF interface information of all OSPF processes is displayed.

Examples

# Display OSPF interface information.

<Sysname> display ospf interface

OSPF Process 1 with Router ID 192.168.1.1

Interfaces

Area: 0.0.0.0

IP Address Type State Cost Pri DR BDR

192.168.1.1 PTP P-2-P 1562 1 0.0.0.0 0.0.0.0

Area: 0.0.0.1

IP Address Type State Cost Pri DR BDR

172.16.0.1 Broadcast DR 1 1 172.16.0.1 0.0.0.0

Table 3-6 Description on the fields of the display ospf interface command

Field	Description
Area	Area ID of the interface
IP address	Interface IP address (regardless of whether TE is enabled or not)
Type	Interface network type: PTP, PTMP, Broadcast, or NBMA
State	Interface state defined by interface state machine: DOWN, Waiting, p-2-p, DR, BDR, or DROther
Cost	Interface cost
Pri	Router priority
DR	The DR on the interface’s network segment
BDR	The BDR on the interface’s network segment

3.1.16 display ospf lsdb

Syntax

display ospf [ process-id ] lsdb [ brief | [ { ase | router | network | summary | asbr | nssa | opaque-link | opaque-area | opaque-as } [ link-state-id ] ] [ originate-router advertising-router-id | self-originate ] ]

View

Any view

Parameters

process-id: OSPF process ID, in the range 1 to 65535.

brief: Displays brief LSDB information.

ase: Displays Type-5 LSA (AS External LSA) information in the LSDB.

router: Displays Type-1 LSA (Router LSA) information in the LSDB.

network: Displays Type-2 LSA (Network LSA) information in the LSDB.

summary: Displays Type-3 LSA (Network Summary LSA) information in the LSDB.

asbr: Displays Type-4 LSA (ASBR Summary LSA) information in the LSDB.

nssa: Displays Type-7 LSA (NSSA External LSA) information in the LSDB.

opaque-link: Displays Type-9 LSA (Opaque-link LSA) information in the LSDB.

opaque-area: Displays Type-10 LSA (Opaque-area LSA) information in the LSDB.

opaque-as: Displays Type-11 LSA (Opaque-AS LSA) information in the LSDB.

link-state-id: Link state ID, in the IP address format.

originate-router advertising-router-id: Displays information about LSAs originated by the specified router.

self-originate: Displays information about self-originated LSAs.

Description

Use the display ospf lsdb command to display LSDB information.

If no OSPF process is specified, LSDB information of all OSPF processes is displayed.

Examples

# Display OSPF LSDB information.

<Sysname> display ospf lsdb

OSPF Process 1 with Router ID 192.168.0.1

Link State Database

Area: 0.0.0.0

Type LinkState ID AdvRouter Age Len Sequence Metric

Router 192.168.0.2 192.168.0.2 474 36 80000004 0

Router 192.168.0.1 192.168.0.1 21 36 80000009 0

Network 192.168.0.1 192.168.0.1 321 32 80000003 0

Sum-Net 192.168.1.0 192.168.0.1 321 28 80000002 1

Sum-Net 192.168.2.0 192.168.0.2 474 28 80000002 1

Area: 0.0.0.1

Type LinkState ID AdvRouter Age Len Sequence Metric

Router 192.168.0.1 192.168.0.1 21 36 80000005 0

Sum-Net 192.168.2.0 192.168.0.1 321 28 80000002 2

Sum-Net 192.168.0.0 192.168.0.1 321 28 80000002 1

Table 3-7 Description on the fields of the display ospf lsdb command

Field	Description
Area	Area
Type	LSA type
LinkState ID	Linkstate ID
AdvRouter	The router that advertised the LSA
Age	Age of the LSA
Len	Length of the LSA
Sequence	Sequence number of the LSA
Metric	Cost of the LSA

# Display Type2 LSA (Network LSA) information in the LSDB.

[Sysname] display ospf 1 lsdb network

OSPF Process 1 with Router ID 192.168.1.1

Area: 0.0.0.0

Link State Database

Type : Network

LS ID : 192.168.0.2

Adv Rtr : 192.168.2.1

LS Age : 922

Len : 32

Options : E

Seq# : 80000003

Chksum : 0x8d1b

Net Mask : 255.255.255.0

Attached Router 192.168.1.1

Attached Router 192.168.2.1

Table 3-8 Description on the fields of the display ospf 1 lsdb network command

Field	Description
Type	LSA type
LS ID	DR IP address
Adv Rtr	Router that advertised the LSA
LS Age	LSA age time
Len	LSA length
Options	LSA options
Seq#	LSA sequence number
Chksum	LSA checksum
Net Mask	Network mask
Attached Router	ID of the router that established adjacency with the DR, and ID of the DR itself

3.1.17 display ospf nexthop

Syntax

display ospf [ process-id ] nexthop

View

Any view

Parameters

process-id: OSPF process ID, in the range 1 to 65535.

Description

Use the display ospf nexthop command to display OSPF next hop information.

If no OSPF process is specified, the next hop information of all OSPF processes is displayed.

Examples

# Display OSPF next hop information.

<Sysname> display ospf nexthop

OSPF Process 1 with Router ID 192.168.0.1

Routing Nexthop Information

Next Hops:

Address Refcount IntfAddr Intf Name

----------------------------------------------------------------

192.168.0.1 1 192.168.0.1 Vlan-interface1

192.168.0.2 1 192.168.0.1 Vlan-interface1

192.168.1.1 1 192.168.1.1 Vlan-interface10

Table 3-9 Description on the fields of the display ospf nexthop command

Field	Description
Next hops	Information about Next hops
Address	Next hop address
Refcount	Reference count, namely, routes that reference the next hop
IntfAddr	Outbound interface address
Intf Name	Outbound interface name

3.1.18 display ospf peer

Syntax

display ospf [ process-id ] peer [ verbose | [ interface-type interface-number ] [ neighbor-id ] ]

View

Any view

Parameters

process-id: OSPF process ID, in the range 1 to 65535.

verbose: Displays detailed neighbor information.

interface-type interface-number: Interface type and interface number.

neighbor-id: Neighbor router ID.

Description

Use the display ospf peer command to display information about OSPF neighbors.

Note that:

If no OSPF process is specified, OSPF neighbor information of all OSPF processes is displayed.

If an interface is specified, the neighbor on the interface is displayed.

If a neighbor ID is specified, detailed information about the neighbor is displayed,

If neither interface nor neighbor ID is specified, brief information about neighbors of the specified OSPF process or all OSPF processes is displayed.

Examples

# Display detailed OSPF neighbor information.

<Sysname> display ospf peer verbose

OSPF Process 1 with Router ID 192.168.0.138

Neighbors

Area 0.0.0.1 interface 192.168.0.138(Vlan-interface1)'s neighbors

Router ID: 192.168.0.136 Address: 192.168.0.136 GR State: Normal

State: Full Mode: Nbr is Slave Priority: 1

DR: 192.168.0.138 BDR: 192.168.0.136 MTU: 0

Dead timer due in 40 sec

Neighbor is up for 00:12:59

Authentication Sequence: [ 0 ]

Neighbor state change count: 5

Table 3-10 Description on the fields of the display ospf peer verbose command

Field	Description
Router ID	Neighbor router ID
Address	Neighbor router address
GR State	GR state
State	Neighbor state: Down, Init, Attempt, 2-Way, Exstart, Exchange, Loading or Full
Mode	Neighbor mode for DD exchange: master or slave
Priority	Router priority
DR	The DR on the interface’s network segment
BDR	The BDR on the interface’s network segment
MTU	Interface MTU
Dead timer due in 40 sec	Dead timer times out in 40 seconds
Neighbor is up for 00:12:59	The neighbor has been up for 00:12:59
Authentication Sequence	Authentication sequence number
Neighbor state change count	Count of neighbor state changes

# Display brief OSPF neighbor information.

<Sysname> display ospf peer

OSPF Process 1 with Router ID 192.168.0.138

Neighbor Brief Information

Area: 0.0.0.1

Router ID Address Pri Dead-Time Interface State

192.168.0.136 192.168.0.136 1 37 Vlan1 Full/BDR

Table 3-11 Description on the fields of the display ospf peer command

Field	Description
Area	Neighbor area
Router ID	Neighbor router ID
Address	Neighbor interface address
Pri	Router priority
Dead time(s)	Dead interval remained
Interface	Interface connected to the neighbor
State	Neighbor state: Down, Init, Attempt, 2-Way, Exstart, Exchange, Loading or Full

3.1.19 display ospf peer statistics

Syntax

display ospf [ process-id ] peer statistics

View

Any view

Parameters

process-id: OSPF process ID, in the range 1 to 65535.

Description

Use the display ospf peer statistics command to display OSPF neighbor statistics.

If no OSPF process is specified, OSPF neighbor statistics of all OSPF processes is displayed.

Examples

# Display OSPF neighbor statistics.

<Sysname> display ospf peer statistics

OSPF Process 1 with Router ID 1.1.1.1

Neighbor Statistics

Area ID Down Attempt Init 2-Way ExStart Exchange Loading Full Total

0.0.0.1 0 0 0 0 0 0 0 1 1

Total 0 0 0 0 0 0 0 1 1

Table 3-12 Description on the fields of the display ospf peer statistics command

Field	Description
Area ID	Area ID
Down	Under this state, neighbor initial state, the router has not received any information from a neighboring router for a period of time.
Attempt	Available only in an NBMA network, such as Frame Relay, X.25 or ATM. Under this state, the OSPF router has not received any information from a neighbor for a period but can send Hello packets with a longer interval to keep neighbor relationship.
Init	Under this state, the router has received a hello packet from a neighbor but the packet contains no IP address of itself, so mutual communication is not established.
2-Way	Indicates mutual communication between the router and its neighbor is established. DR/BDR election is finished under this state (or higher).
ExStart	Under this state, the router decides on sequence numbers for DD packets.
Exchange	Under this state, the router exchanges link state information with the neighbor.
Loading	Under this state, the router requests the neighbor for needed LSAs.
Full	Indicates LSDB synchronization has been accomplished between neighbors.
Total	Total number of neighbors under the same state

3.1.20 display ospf request-queue

Syntax

display ospf [ process-id ] request-queue [ interface-type interface-number ] [ neighbor-id ]

View

Any view

Parameters

process-id: OSPF process ID, in the range 1 to 65535.

interface-type interface-number: Interface type and number.

neighbor-id: Neighbor’s router ID.

Description

Use the display ospf request-queue command to display OSPF request queue information.

If no OSPF process is specified, the OSPF request queue information of all OSPF processes is displayed.

Examples

# Display OSPF request queue information.

<Sysname> display ospf request-queue

OSPF Process 1 with Router ID 1.1.1.1

OSPF Request List

The Router's Neighbor is Router ID 2.2.2.2 Address 10.1.1.2

Interface 10.1.1.1 Area 0.0.0.0

Request list:

Type LinkState ID AdvRouter Sequence Age

Router 2.2.2.2 1.1.1.1 80000004 1

Network 192.168.0.1 1.1.1.1 80000003 1

Sum-Net 192.168.1.0 1.1.1.1 80000002 2

Table 3-13 Description on the fields of the display ospf request queue command

Field	Description
The Router's Neighbor is Router ID	Neighbor router ID
Address	Neighbor interface IP address
Interface	Local interface IP address
Area	Area ID
Request list	Request list information
Type	LSA type
LinkState ID	Link state ID
AdvRouter	Advertising router
Sequence	LSA sequence number
Age	LSA age

3.1.21 display ospf retrans-queue

Syntax

display ospf [ process-id ] retrans-queue [ interface-type interface-number ] [ neighbor-id ]

View

Any view

Parameters

process-id: OSPF process ID, in the range 1 to 65535.

interface-type interface-number: Interface type and interface number.

neighbor-id: Neighbor’s router ID.

Description

Use the display ospf retrans-queue command to display retransmission queue information.

If no OSPF process is specified, the retransmission queue information of all OSPF processes is displayed.

Examples

# Display OSPF retransmission queue information.

<Sysname> display ospf retrans-queue

OSPF Process 1 with Router ID 1.1.1.1

OSPF Retransmit List

The Router's Neighbor is Router ID 2.2.2.2 Address 10.1.1.2

Interface 10.1.1.1 Area 0.0.0.0

Retransmit list:

Type LinkState ID AdvRouter Sequence Age

Router 2.2.2.2 2.2.2.2 80000004 1

Network 12.18.0.1 2.2.2.2 80000003 1

Sum-Net 12.18.1.0 2.2.2.2 80000002 2

Table 3-14 Description on the fields of the display ospf retrans-queue command

Field	Description
The Router's Neighbor is Router ID	Neighbor router ID
Address	Neighbor interface IP address
Interface	Interface address of the router
Area	Area ID
Retransmit list	Retransmission list
Type	LSA type
LinkState ID	Link state ID
AdvRouter	Advertising router
Sequence	LSA sequence number
Age	LSA age

3.1.22 display ospf routing

Syntax

display ospf [ process-id ] routing [ interface interface-type interface-number ] [ nexthop nexthop-address ]

View

Any view

Parameters

process-id: OSPF process ID, in the range 1 to 65535.

interface interface-type interface-number: Displays OSPF routing information advertised via the interface.

nexthop nexthop-address: Displays OSPF routing information with the specified next hop.

Description

Use the display ospf routing command to display OSPF routing information.

If no OSPF process is specified, the routing information of all OSPF processes is displayed.

Examples

# Display OSPF routing information.

<Sysname> display ospf routing

OSPF Process 1 with Router ID 192.168.1.2

Routing Tables

Routing for Network

Destination Cost Type NextHop AdvRouter Area

192.168.1.0/24 1562 stub 192.168.1.2 192.168.1.2 0.0.0.0

172.16.0.0/16 1563 Inter 192.168.1.1 192.168.1.1 0.0.0.0

Total Nets: 2

Intra Area: 1 Inter Area: 1 ASE: 0 NSSA: 0

Table 3-15 Description on the fields of the display ospf routing command

Field	Description
Destination	Destination network
Cost	Cost to destination
Type	Route type: intra-area, transit, stub, inter-area, type1 external, type2 external.
NextHop	Next hop address
AdvRouter	Advertising router
Area	Area ID
Total Nets	Total networks
Intra Area	Total intra-area routes
Inter Area	Total inter-area routes
ASE	Total ASE routes
NSSA	Total NSSA routes

3.1.23 display ospf vlink

Syntax

display ospf [ process-id ] vlink

View

Any view

Parameters

process-id: OSPF process ID, in the range 1 to 65535.

Description

Use the display ospf vlink command to display OSPF virtual link information.

If no OSPF process is specified, the OSPF virtual link information of all OSPF processes is displayed.

Examples

# Display OSPF virtual link information.

<Sysname> display ospf vlink

OSPF Process 1 with Router ID 3.3.3.3

Virtual Links

Virtual-link Neighbor-ID -> 2.2.2.2, Neighbor-State: Full

Interface: 10.1.2.1 (Vlan-interface1)

Cost: 1 State: P-2-P Type: Virtual

Transit Area: 0.0.0.1

Timers: Hello 10 , Dead 40 , Retransmit 5 , Transmit Delay 1

Table 3-16 Description on the fields of the display ospf vlink command

Field	Description
Virtual-link Neighbor-id	ID of the neighbor connected to the router via the virtual link
Neighbor-State	Neighbor State: Down, Attempt, Init, 2-Way, ExStart, Exchange, Loading, Full.
Interface	Local interface’s IP address and name of the virtual link
Cost	Interface route cost
State	Interface state
Type	Type: virtual link
Transit Area	Transit area ID
Timers	Values of timers: hello, dead, poll (NBMA), retransmit, and interface transmission delay

3.1.24 enable link-local-signaling

Syntax

enable link-local-signaling

undo enable link-local-signaling

View

OSPF view

Parameters

None

Description

Use the enable link-local-signaling command to enable the OSPF link-local signaling (LLC) capability.

Use the undo enable link-local-signaling command to disable the OSPF link-local signaling capability.

By default, this capability is disabled.

Examples

# Enable link-local signaling for OSPF process 1.

<Sysname> system-view

[Sysname] ospf 1

[Sysname-ospf-1] enable link-local-signaling

3.1.25 enable log

Syntax

enable log [ config | error | state ]

undo enable log [ config | error | state ]

View

OSPF view

Parameters

config: Enables configuration logging.

error: Enables error logging.

state: Enables state logging.

Description

Use the enable command to enable specified OSPF logging.

Use the undo enable command to disable specified OSPF logging.

OSPF logging is disabled by default.

If no keyword is specified, all logging is enabled.

Examples

# Enable OSPF logging.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] enable log

3.1.26 enable out-of-band-resynchronization

Syntax

enable out-of-band-resynchronization

undo enable out-of-band-resynchronization

View

OSPF view

Parameters

None

Description

Use the enable out-of-band-resynchronization command to enable the OSPF out-of-band resynchronization (OOB-Resynch) capability.

Use the undo enable out-of-band-resynchronization command to disable the OSPF out-of-band resynchronization capability.

By default, the capability is disabled.

Examples

# Enable the out-of-band resynchronization capability for OSPF process 1.

<Sysname> system-view

[Sysname] ospf 1

[Sysname-ospf-1] enable link-local-signaling

[Sysname-ospf-1] enable out-of-band-resynchronization

3.1.27 filter

Syntax

filter { acl-number | ip-prefix ip-prefix-name } { import | export }

undo filter { import | export }

View

OSPF area view

Parameters

acl-number: ACL number, in the range 2000 to 3999.

ip-prefix-name: IP prefix list name, a string of up to 19 characters.

import: Filters incoming LSAs.

export: Filters outgoing LSAs.

Description

Use the filter command to configure incoming/outgoing summary LSAs filtering on an ABR.

Use the undo filter command to disable summary LSA filtering.

By default, summary LSAs filtering is disabled.

& Note:

This command is only available on an ABR.

Examples

# Apply IP prefix list my-prefix-list to filter inbound Type-3 LSAs, and apply ACL 2000 to filter outbound Type-3 LSAs in OSPF Area 1.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] area 1

[Sysname-ospf-100-area-0.0.0.1] filter ip-prefix my-prefix-list import

[Sysname-ospf-100-area-0.0.0.1] filter 2000 export

3.1.28 filter-policy export

Syntax

filter-policy { acl-number | ip-prefix ip-prefix-name } export [ protocol [ process-id ] ]

undo filter-policy export [ protocol [ process-id ] ]

View

OSPF view

Parameters

acl-number: Number of an ACL used to filter outgoing redistributed routes, in the range 2000 to 3999.

ip-prefix-name: Name of an IP prefix list used to filter outgoing redistributed routes, a string of up to 19 characters.

protocol: Specifies a protocol from which to filter redistributed routes. The protocol can be direct, static, rip, isis, ospf or bgp. If no protocol is specified, all redistributed routes are filtered.

process-id: Process ID, which is required when the protocol is ospf, rip or isis, in the range 1 to 65535.

Description

Use the filter-policy export command to configure the filtering of outgoing redistributed routes.

Use the undo filter-policy export command to disable the filtering.

By default, the filtering of outgoing redistributed routes is not configured.

You can use this command to filter outgoing redistributed routes as needed.

Related commands: import-route.

Examples

# Filter outgoing redistributed routes using ACL 2000.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] filter-policy 2000 export

3.1.29 filter-policy import

Syntax

filter-policy { acl-number | ip-prefix ip-prefix-name | gateway ip-prefix-name } import

undo filter-policy import

View

OSPF view

Parameters

acl-number: Number of an ACL used to filter incoming routes, in the range 2000 to 3999.

ip-prefix-name: Name of an IP address prefix list used to filter incoming routes, a string of up to 19 characters.

gateway ip-prefix-name: Name of an IP address prefix list used to filter routes from the specified neighbors, a string of up to 19 characters.

Description

Use the filter-policy import command to configure the filtering of incoming routes.

Use the undo filter-policy import command to disable the filtering.

By default, no filtering of incoming routes is configured.

You can use the command to filter incoming routes as needed.

Examples

# Filter incoming routes using ACL 2000.

<Sysname> system-view

[Sysname] acl number 2000

[Sysname-acl-basic-2000] rule permit source 192.168.10.0 0.0.0.255

[Sysname-acl-basic-2000] quit

[Sysname] ospf 100

[Sysname-ospf-100] filter-policy 2000 import

3.1.30 graceful-restart

Syntax

graceful-restart [ nonstandard | ietf ]

undo graceful-restart

View

OSPF view

Parameters

nonstandard: Enables the non-IETF GR capability.

ietf: Enables the IETF GR capability.

Description

Use the graceful-restart command to enable OSPF Graceful Restart capability.

Use the undo graceful-restart command to disable OSPF Graceful Restart capability.

By default, OSPF Graceful Restart capability is disabled.

Note the following:

l Enable Opaque LSA advertisement and reception with the opaque-capability enable command before enabling the IETF GR capability for OSPF.

l Before enabling non-IETF GR capability for OSPF, enable OSPF LLS (link local signaling) with the enable link-local-signaling command and OOB (out of band resynchronization) with the enable out-of-band-resynchronization command.

l If the keywords nonstandard and ietf are not specified when OSPF GR is enabled, nonstandard is the default.

Related commands: enable link-local-signaling, enable out-of-band-resynchronization, opaque-capability enable.

Examples

# Enable IETF Graceful Restart for OSPF process 1.

<Sysname> system-view

[Sysname] ospf 1

[Sysname-ospf-1] opaque-capability enable

[Sysname-ospf-1] graceful-restart ietf

# Enable non-IETF Graceful Restart for OSPF process 1.

<Sysname> system-view

[Sysname] ospf 1

[Sysname-ospf-1] enable link-local-signaling

[Sysname-ospf-1] enable out-of-band-resynchronization

[Sysname-ospf-1] graceful-restart nonstandard

3.1.31 graceful-restart help

Syntax

graceful-restart help { acl-number | prefix prefix-list }

undo graceful-restart help

View

OSPF view

Parameters

acl-number: Basic or advanced ACL number, in the range 2000 to 3999.

prefix-list: Name of the specified IP prefix list, a string of 1 to 19 characters.

Description

Use the graceful-restart help command to configure for which OSPF neighbors the current router can serve as a GR Helper. (The neighbors are specified by the ACL or the IP prefix list.)

Use the undo graceful-restart help command to restore the default.

By default, the router can serve as a GR Helper for any OSPF neighbor.

Examples

# Configure the switch as a GR Helper for OSPF neighbors defined in the ACL 2001.

<Sysname> system-view

[Sysname] ospf 1

[Sysname-ospf-1] graceful-restart help 2001

3.1.32 graceful-restart interval

Syntax

graceful-restart interval interval-value

undo graceful-restart interval

View

OSPF view

Parameters

interval-value: Specifies the Graceful Restart interval, in the range 40 to 1,800 seconds.

Description

Use the graceful-restart interval command to configure the Graceful Restart interval.

Use the undo graceful-restart interval command to restore the default Graceful Restart interval.

By default, the Graceful Restart interval is 120 seconds.

Note that the Graceful Restart interval of OSPF cannot be less than the maximum value of dead intervals on all OSPF interfaces; otherwise, the Graceful Restart of OSPF may fail.

Related commands: ospf timer dead.

Examples

# Configure the Graceful Restart interval for OSPF process 1 as 100 seconds.

<Sysname> system-view

[Sysname] ospf 1

[Sysname-ospf-1] graceful-restart interval 100

3.1.33 host-advertise

Syntax

host-advertise ip-address cost

undo host-advertise ip-address

View

OSPF area view

Parameters

ip-address: IP address of a host

cost: Cost of the route, in the range 1 to 65535.

Description

Use the host-advertise command to advertise a host route.

Use the undo host-advertise command to remove a host route.

No host route is advertised by default.

Examples

# Advertise the host route 1.1.1.1 with a cost of 100.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] area 0

[Sysname-ospf-100-area-0.0.0.0] host-advertise 1.1.1.1 100

3.1.34 import-route

Syntax

import-route protocol [ process-id | allow-ibgp ] [ cost cost | type type | tag tag | route-policy route-policy-name ]*

undo import-route protocol [ process-id ]

View

OSPF view

Parameters

protocol: Redistributes routes from the protocol, which can be direct, static, rip, ospf, isis or bgp.

process-id: Process ID, in the range 1 to 65535. The default is 1. It is available only when the protocol is rip, ospf,or isis.

allow-ibgp: Allows IBGP routes redistribution. It is optional only when the protocol is bgp.

cost cost: Specifies a route cost, in the range 0 to 16777214. The default is 1.

type type: Specifies a cost type, 1 or 2. The default is 2.

tag tag : Specifies a tag for external LSAs. The default is 1.

route-policy route-policy-name: Specifies a route policy to redistribute qualified routes only. A Route policy name is a string of up to 19 characters.

Description

Use the import-route command to redistribute routes from another protocol.

Use the undo import-route command to disable route redistribution from a protocol.

Route redistribution from another protocol is not configured by default.

OSPF prioritize routes as follows:

l Intra-area route

l Inter-area route

l Type1 External route

l Type2 External route

An intra-area route is a route in an OSPF area. An inter-area route is between any two OSPF areas. Both of them are internal routes.

An external route is a route to a destination outside the OSPF AS.

A Type-1 external route is an IGP route, such as RIP or STATIC, which has high reliability and whose cost is comparable with the cost of OSPF internal routes. Therefore, the cost from an OSPF router to a Type-1 external route’s destination equals the cost from the router to the corresponding ASBR plus the cost from the ASBR to the external route’s destination.

A Type-2 external route is an EGP route, which has low credibility, so OSPF considers the cost from the ASBR to a Type-2 external route is much bigger than the cost from the ASBR to an OSPF internal router. Therefore, the cost from an internal router to a Type-2 external route’s destination equals the cost from the ASBR to the Type-2 external route’s destination.

Related commands: default-route-advertise.

& Note:

l The import-route command cannot redistribute default routes.

l Use the import-route bgp allow-ibgp command with care, because it redistributes both EBGP and IBGP routes that may cause routing loops.

Examples

# Redistribute routes from RIP process 40 and specify the type, tag, and cost as 2, 33 and 50 for redistributed routes.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] import-route rip 40 type 2 tag 33 cost 50

3.1.35 log-peer-change

Syntax

log-peer-change

undo log-peer-change

View

OSPF view

Parameters

None

Description

Use the log-peer-change command to enable the logging of OSPF neighbor state changes.

Use the undo log-peer-change command to disable the logging.

The logging is enabled by default.

With this feature enabled, information about neighbor state changes is displayed on the terminal until the feature is disabled.

Examples

# Disable the logging of neighbor state changes for OSPF process 100.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] undo log-peer-change

3.1.36 lsa-arrival-interval

Syntax

lsa-arrival-interval interval

undo lsa-arrival-interval

View

OSPF view

Parameters

interval: Specifies the minimum LSA repeat arrival interval in milliseconds, in the range 0 to 60000.

Description

Use the lsa-arrival-interval command to specify the minimum LSA repeat arrival interval.

Use the undo lsa-arrival-interval command to restore the default.

The interval defaults to 1000 milliseconds.

If an LSA that has the same LSA type, LS ID, originating router ID with the previous LSA is received within the interval, the LSA will be discarded. This feature helps protect routers and bandwidth from being over-consumed due to frequent network changes.

It is recommended the interval set with the lsa-arrival-interval command is smaller or equal to the initial interval set with the lsa-generation-interval command.

Related commands: lsa-generation-interval.

Examples

# Set the LSA minimum repeat arrival interval to 200 milliseconds.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] lsa-arrival-interval 200

3.1.37 lsa-generation-interval

Syntax

lsa-generation-interval maximum-interval [ initial-interval [ incremental-interval ] ]

undo lsa-generation-interval

View

OSPF view

Parameters

maximum-interval: Maximum LSA generation interval in seconds, in the range 1 to 60.

initial-interval: Minimum LSA generation interval in milliseconds, in the range 10 to 60000. The default is 0.

incremental-interval: LSA generation incremental interval in milliseconds, in the range 10 to 60000. The default is 5000 milliseconds.

Description

Use the lsa-generation-interval command to configure the OSPF LSA generation interval.

Use the undo lsa-generation-interval command to restore the default.

The LSA generation interval defaults to 5 seconds.

With this command configured, when network changes are not frequent, LSAs are generated at the initial-interval. If network changes become frequent, LSA generation interval is incremented by a specified value each time a generation happens, up to the maximum-interval.

Related commands: lsa-arrival-interval.

Examples

# Configure the maximum LSA generation interval as 2 seconds, minimum interval as 100 milliseconds and incremental interval as 100 milliseconds.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] lsa-generation-interval 2 100 100

3.1.38 lsdb-overflow-limit

Syntax

lsdb-overflow-limit number

undo lsdb-overflow-limit

View

OSPF view

Parameters

number: Specifies the upper limit of external LSAs in the LSDB, in the range 1 to 1000000.

Description

Use the lsdb-overflow-limit command to specify the upper limit of external LSAs in the LSDB.

Use the undo lsdb-overflow-limit command to cancel the limitation.

External LSAs in the LSDB are unlimited by default.

Examples

# Specify the upper limit of external LSAs as 400000.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] lsdb-overflow-limit 400000

3.1.39 maximum load-balancing

Syntax

maximum load-balancing maximum

undo maximum load-balancing

View

OSPF view

Parameters

maximum: Maximum number of equal cost routes for load balancing, in the range 1 to 4. No load balancing is available when the number is set to 1.

Description

Use the maximum load-balancing command to specify the maximum number of equal cost routes for load balancing.

Use the undo maximum load-balancing command to restore the default.

By default, the maximum number of equal cost routes is 4.

Examples

# Specify the maximum number of equal cost routes as 2.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] maximum load-balancing 2

3.1.40 maximum-routes

Syntax

maximum-routes { external | inter | intra } number

undo maximum-routes { external | inter | intra }

View

OSPF view

Parameters

external: Specifies the maximum number of external routes.

inter: Specifies the maximum number of inter-area routes.

intra: Specifies the maximum number of intra-area routes.

number: Maximum route number, in the range 0 to 12288.

Description

Use the maximum-routes command to specify the maximum route number of a specified type, inter-area, intra-area or external.

Use the undo maximum-routes command to restore the default route maximum value of a specified type.

By default, the maximum route number is 12288.

Examples

# Specify the maximum number of intra-area routes as 500.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] maximum-routes intra 500

3.1.41 network

Syntax

network ip-address wildcard-mask

undo network ip-address wildcard-mask

View

OSPF area view

Parameters

ip-address: IP address of a network.

wildcard-mask: Wildcard mask of the IP address. For example, the wildcard mask of mask 255.0.0.0 is 0.255.255.255.

Description

Use the network command to enable OSPF on the interface attached to the specified network in the area.

Use the undo network command to disable OSPF on an interface.

By default, an interface neither belongs to any area nor runs OSPF.

You can configure one or multiple interfaces in an area to run OSPF. Note that the interface’s primary IP address must fall into the specified network segment to make the interface run OSPF. If only the interface’s secondary IP address falls into the network segment, the interface cannot run OSPF.

Related commands: ospf.

Examples

# Specify the interface whose primary IP address falls into 131.108.20.0/24 to run OSPF in Area 2.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] area 2

[Sysname-ospf-100-area-0.0.0.2] network 131.108.20.0 0.0.0.255

3.1.42 nssa

Syntax

nssa [ default-route-advertise | no-import-route | no-summary ]*

undo nssa

View

OSPF area view

Parameters

default-route-advertise: Usable on an NSSA ABR or an ASBR only. If it is configured on an NSSA ABR, the ABR generates a default route in a Type-7 LSA into the NSSA regardless of whether the default route is available. If it is configured on an ASBR, only a default route is available on the ASBR can it generates the default route in a Type-7 LSA into the attached area.

no-import-route: Usable only on an NSSA ABR that is also the ASBR of the OSPF routing domain to disable redistributing routes in Type7 LSAs into the NSSA area, making sure that routes can be redistributed correctly.

no-summary: Usable only on an NSSA ABR to advertise only a default route in a Type-3 summary LSA into the NSSA area. In this way, all the other summary LSAs are not advertised into the area. Such an area is known as an NSSA totally stub area.

Description

Use the nssa command to configure the current area as an NSSA area.

Use the undo nssa command to restore the default.

By default, no NSSA area is configured.

All routers attached to an NSSA area must be configured with the nssa command in area view.

Related commands: default-cost.

Examples

# Configure Area 1 as an NSSA area.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] area 1

[Sysname-ospf-100-area-0.0.0.1] nssa

3.1.43 opaque-capability enable

Syntax

opaque-capability enable

undo opaque-capability

View

OSPF view

Parameters

None

Description

Use the opaque-capability enable command to enable opaque LSA advertisement and reception. With the command configured, the OSPF device can receive and advertise the Type-9, Type-10 and Type-11 opaque LSAs.

Use the undo opaque-capability command to restore the default.

The feature is disabled by default.

Examples

# Enable advertising and receiving opaque LSAs.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100]opaque-capability enable

3.1.44 ospf

Syntax

ospf [ process-id | router-id router-id ]*

undo ospf [ process-id ]

View

System view

Parameters

process-id: OSPF process ID, in the range 1 to 65535.

router-id: OSPF Router ID, in dotted decimal format.

Description

Use the ospf command to enable an OSPF process.

Use the undo ospf command to disable an OSPF process.

No OSPF process is enabled by default.

Use the router-id argument to specify different Router IDs for these processes.

Examples

# Enable OSPF process 100 and specify Router ID 10.10.10.1.

<Sysname> system-view

[Sysname] ospf 100 router-id 10.10.10.1

[Sysname-ospf-100]

3.1.45 ospf authentication-mode

Syntax

For MD5/HMAC-MD5 authentication:

ospf authentication-mode { md5 | hmac-md5 } key-id [ plain | cipher ] password

undo ospf authentication-mode { md5 | hmac-md5 } key-id

For simple authentication:

ospf authentication-mode simple [ plain | cipher ] password

undo ospf authentication-mode simple

View

Interface view

Parameters

md5: MD5 authentication.

hmac-md5: HMAC-MD5 authentication.

simple: Simple authentication.

key-id: Authentication key ID, in the range 1 to 255.

plain | cipher: Plain or cipher password. If plain is specified, only plain password is supported and displayed upon displaying the configuration file. If cipher is specified, both plain and cipher are supported, but only cipher password is displayed when displaying the configuration file. If no keyword is specified, the cipher type is the default for the MD5/HMAC-MD5 authentication mode, and the plain type is the default for the simple authentication mode.

password: Password. Simple authentication: For plain type password, a plain password is a string of up to 8 characters; for cipher type password, a plain password is a string of up to 8 characters, and a cipher password is a string of up to 24 characters. MD5/HMAC-MD5 authentication: For plain type password, a plain password is a string of up to 16 characters; for cipher type password, a plain password is a string of up to 16 characters, and a cipher password is a string of up to 24 characters.

Description

Use the ospf authentication-mode command to set the authentication mode and key ID on an interface.

Use the undo ospf authentication-mode command to remove specified configuration.

By default, no authentication is available on an interface.

Interfaces attached to the same network segment must have the same authentication password and mode.

This configuration is not supported on the NULL interface.

Related commands: authentication-mode.

Examples

# Configure the network 131.119.0.0/16 in Area 1 to support MD5 cipher authentication, and set the interface key ID to 15, authentication password to abc, and password type to cipher.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] area 1

[Sysname-ospf-100-area-0.0.0.1] network 131.119.0.0 0.0.255.255

[Sysname-ospf-100-area-0.0.0.1] authentication-mode md5

[Sysname-ospf-100-area-0.0.0.1] quit

[Sysname-ospf-100] quit

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] ospf authentication-mode md5 15 cipher abc

# Configure the network 131.119.0.0/16 in Area 1 to support simple authentication, and set for the interface the authentication password to abc, and password type to cipher.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] area 1

[Sysname-ospf-100-area-0.0.0.1] network 131.119.0.0 0.0.255.255

[Sysname-ospf-100-area-0.0.0.1] authentication-mode simple

[Sysname-ospf-100-area-0.0.0.1] quit

[Sysname-ospf-100] quit

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] ospf authentication-mode simple cipher abc

3.1.46 ospf cost

Syntax

ospf cost value

undo ospf cost

View

Interface view

Parameters

value: OSPF cost, in the range 1 to 65535.

Description

Use the ospf cost command to set an OSPF cost for the interface.

Use the undo ospf cost command to restore the default OSPF cost for the interface.

By default, an OSPF interface calculates its cost with the formula: interface default OSPF cost=100 Mbps/interface bandwidth(Mbps). Default OSPF costs of some interfaces are:

l 1785 for the 56 kbps serial interface

l 1562 for the 64 kbps serial interface

l 48 for the E1 (2.048 Mbps) interface

l 1 for the Ethernet interface

You can use the ospf cost command to set an OSPF cost for an interface manually.

This configuration is not supported on the NULL interface.

Examples

# Set the OSPF cost for the interface to 65.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] ospf cost 65

3.1.47 ospf dr-priority

Syntax

ospf dr-priority priority

undo ospf dr-priority

View

Interface view

Parameters

priority: DR Priority of the interface, in the range 0 to 255.

Description

Use the ospf dr-priority command to set the priority for DR/BDR election on an interface.

Use the undo ospf dr-priority command to restore the default value.

By default, the priority is 1.

The bigger the value, the higher the priority.

This configuration is not supported on the NULL interface.

Examples

# Set the DR priority on the current interface to 8.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] ospf dr-priority 8

3.1.48 ospf mib-binding

Syntax

ospf mib-binding process-id

undo ospf mib-binding

View

System view

Parameters

process-id: OSPF process ID, in the range 1 to 65535.

Description

Use the ospf mib-binding command to bind an OSPF process to MIB operation.

Use the undo ospf mib-binding command to restore the default.

By default, MIB operation is bound to the first enabled OSPF process.

Examples

# Bind OSPF process 100 to MIB operation.

<Sysname> system-view

[Sysname] ospf mib-binding 100

3.1.49 ospf mtu-enable

Syntax

ospf mtu-enable

undo ospf mtu-enable

View

Interface view

Parameters

None

Description

Use the ospf mtu-enable command to enable an interface to add the real MTU into DD packets.

Use the undo ospf mtu-enable command to restore the default.

By default, an interface adds a MTU of 0 into DD packets, that is, no real MTU is added.

This configuration is not supported on the NULL interface.

Examples

# Enable the interface to add the real MTU value into DD packets.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] ospf mtu-enable

3.1.50 ospf network-type

Syntax

ospf network-type { broadcast | nbma | p2mp | p2p }

undo ospf network-type

View

Interface view

Parameters

broadcast: Specifies the network type as Broadcast.

nbma: Specifies the network type as NBMA.

p2mp: Specifies the network type as P2MP.

p2p: Specifies the network type as P2P.

Description

Use the ospf network-type command to set the network type for an interface.

Use the undo ospf network-type command to restore the default network type for an interface.

By default, the network type of an interface depends on its link layer protocol.

l For Ethernet, and FDDI, the default network type is broadcast.

l For ATM, FR, HDLC and X.25, the default network type is NBMA.

l For PPP, LAPB and POS, the default network type is P2P.

Note that:

l If a router on a broadcast network does not support multicast, you can configure the interface’s network type as NBMA.

l If any two routers on an NBMA network are directly connected via a virtual link, that is, the network is fully meshed, you can configure the network type as NBMA; otherwise you need to configure it as P2MP for two routers having no direct link to exchange routing information via another router.

l When the network type of an interface is NBMA, you need to use the peer command to specify a neighbor.

l If only two routers run OSPF on a network segment, you can configure associated interfaces’ network type as P2P.

Related commands: ospf dr-priority.

& Note:

This command is not supported on the NULL interface.

Examples

# Configure the interface’s network type as NBMA.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] ospf network-type nbma

3.1.51 ospf timer dead

Syntax

ospf timer dead seconds

undo ospf timer dead

View

Interface view

Parameters

seconds: Dead interval in seconds, in the range 1 to 2147483647.

Description

Use the ospf timer dead command to set the dead interval.

Use the undo ospf timer dead command to restore the default.

The dead interval defaults to 40s for Broadcast, P2P interfaces and defaults to 120s for P2MP and NBMA interfaces.

If an interface receives no hello packet from the neighbor within the dead interval, the interface considers the neighbor down. The dead interval on an interface is at least four times the hello interval. Any two routers attached to the same segment must have the same dead interval.

This configuration is not supported on the NULL interface.

Related commands: ospf timer hello.

Examples

# Configure the dead interval on the current interface as 60 seconds.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] ospf timer dead 60

3.1.52 ospf timer hello

Syntax

ospf timer hello seconds

undo ospf timer hello

View

Interface view

Parameters

seconds: Hello interval in seconds, in the range 1 to 65535.

Description

Use the ospf timer hello command to set the hello interval on an interface.

Use the undo ospf timer hello command to restore the default hello interval on an interface.

The hello interval defaults to 10s for P2P and Broadcast interfaces, and defaults to 30s for P2MP and NBMA interfaces.

The shorter the hello interval is, the faster the topology converges and the more resources are consumed. Make sure the hello interval on two neighboring interfaces is the same.

This configuration is not supported on the NULL interface.

Related commands: ospf timer dead.

Examples

# Configure the hello interval on the current interface as 20 seconds.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] ospf timer hello 20

3.1.53 ospf timer poll

Syntax

ospf timer poll seconds

undo ospf timer poll

View

Interface view

Parameters

seconds: Poll interval in seconds, in the range 1 to 2147483647.

Description

Use the ospf timer poll command to set the poll interval on an NBMA interface.

Use the undo ospf timer poll command to restore the default value.

By default, the poll interval is 120s.

When an NBMA interface finds its neighbor is down, it will send hello packets at the poll interval. The poll interval is at least four times the hello interval.

This configuration is not supported on the NULL interface.

Related commands: ospf timer hello.

Examples

# Set the poll timer interval on the current interface to 130 seconds.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] ospf timer poll 130

3.1.54 ospf timer retransmit

Syntax

ospf timer retransmit interval

undo ospf timer retransmit

View

Interface view

Parameters

interval: LSA retransmission interval in seconds, in the range 1 to 3600.

Description

Use the ospf timer retransmit command to set the LSA retransmission interval on an interface.

Use the undo ospf timer retransmit command to restore the default.

The interval defaults to 5s.

After sending an LSA, an interface waits for an acknowledgement packet. If the interface receives no acknowledgement within the retransmission interval, it will retransmit the LSA.

The retransmission interval should not be so small to avoid unnecessary retransmissions.

This configuration is not supported on the NULL interface.

Examples

# Set the LSA retransmission interval to 8 seconds.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] ospf timer retransmit 8

3.1.55 ospf trans-delay

Syntax

ospf trans-delay seconds

undo ospf trans-delay

View

Interface view

Parameters

seconds: LSA transmission delay in seconds, in the range 1 to 3600.

Description

Use the ospf trans-delay command to set the LSA transmission delay on an interface.

Use the undo ospf trans-delay command to restore the default.

The delay defaults to 1s.

Each LSA in the LSDB has an age that is incremented by 1 every second, but the age does not change during transmission. It is necessary to add a transmission delay into its age time, which is important for low speed networks.

This configuration is not supported on the NULL interface.

Examples

# Set the LSA transmission delay to 3 seconds on the current interface.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] ospf trans-delay 3

3.1.56 peer

Syntax

peer ip-address [ dr-priority dr-priority ]

undo peer ip-address

View

OSPF view

Parameters

ip-address: Neighbor IP address.

dr-priority: Neighbor DR priority, in the range 0 to 255; the bigger the value, the higher the priority.

Description

Use the peer command to specify a neighbor, and the DR priority of the neighbor.

Use the undo peer command to remove the configuration.

On an X.25 or Frame Relay network, you can configure mappings to make the network fully meshed (any two routers have a direct link in between), so OSPF can handle DR/BDR election as it does on a broadcast network. However, since routers on the network cannot find neighbors via broadcasting hello packets, you need to specify neighbors and neighbor DR priorities on the routers.

After startup, a router sends a hello packet to neighbors with DR priorities higher than 0. When the DR and BDR are elected, the DR will send hello packets to all neighbors for adjacency establishment.

A router uses the priority set with the peer command to determine whether to send a hello packet to the neighbor rather than for DR election. The DR priority set with the ospf dr-priority command is used for DR election.

Related commands: ospf dr-priority.

Examples

# Specify the neighbor 1.1.1.1.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] peer 1.1.1.1

3.1.57 preference

Syntax

preference [ ase ] [ route-policy route-policy-name ] value

undo preference [ ase ]

View

OSPF view

Parameters

ase: Sets a priority for ASE routes. If the keyword is not specified, using the command sets a priority for OSPF internal routes.

route-policy: Applies a routing policy to set priorities for specified routes.

route-policy-name: Routing policy name, a string of 1 to 19 characters.

value: Priority value, in the range 1 to 255. A smaller value represents a higher priority.

Description

Use the preference command to set the priority of OSPF routes.

Use the undo preference command to restore the default.

The priority of OSPF internal routes defaults to 10, and the priority of OSPF external routes defaults to 150.

If a routing policy is specified, priorities defined by the routing policy will apply to matched routes, and the priorities set with the preference command apply to OSPF routes not matching the routing policy.

A router may run multiple routing protocols. When several routing protocols find routes to the same destination, the router uses the route found by the protocol with the highest priority.

Examples

# Set a priority of 150 for OSPF internal routes.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] preference 150

3.1.58 reset ospf counters

Syntax

reset ospf [ process-id ] counters [ neighbor [ interface-type interface-number ] [ router-id ] ]

View

User view

Parameters

process-id: OSPF process ID, in the range 1 to 65535.

neighbor: Clears neighbor statistics.

interface-type interface-number: Interface type and interface number.

router-id: Neighbor Router ID.

Description

Use the reset ospf counters command to reset OSPF counters. If no OSPF process is specified, counters of all OSPF processes are reset.

Examples

# Reset OSPF counters.

<Sysname> reset ospf counters

3.1.59 reset ospf process

Syntax

reset ospf [ process-id ] process [ graceful-restart ]

View

User view

Parameters

process-id: OSPF process ID, in the range 1 to 65535.

graceful-restart: Starts GR for the OSPF process.

Description

Use the reset ospf process command to reset all OSPF processes or a specified process.

Using the reset ospf process command will:

l Clear all invalid LSAs without waiting for their timeouts;

l Make a newly configured Router ID take effect;

l Start a new round of DR/BDR election;

l Not remove any previous OSPF configurations.

The system prompts whether to reset OSPF process upon execution of this command.

Examples

# Reset all OSPF processes.

<Sysname> reset ospf process

3.1.60 reset ospf redistribution

Syntax

reset ospf [ process-id ] redistribution

View

User view

Parameters

process-id: OSPF process ID, in the range 1 to 65535.

Description

Use the reset ospf redistribution command to restart route redistribution. If no process ID is specified, using the command restarts route redistribution for all OSPF processes.

Examples

# Restart route redistribution.

<Sysname> reset ospf redistribution

3.1.61 rfc1583 compatible

Syntax

rfc1583 compatible

undo rfc1583 compatible

View

OSPF view

Parameters

None

Description

Use the rfc1583 compatible command to make routing rules defined in RFC1583 compatible.

Use the undo rfc1583 compatible command to disable the function.

By default, RFC1583 routing rules are compatible.

RFC1583 and RFC2328 have different routing rules on selecting the best route when multiple AS external LSAs describe routes to the same destination. Using this command can make them compatible.

Examples

# Make RFC1583 routing rules compatible.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] rfc1583 compatible

3.1.62 silent-interface

Syntax

silent-interface { all | interface-type interface-number }

undo silent-interface { all | interface-type interface-number }

View

OSPF view

Parameters

all: Disables all interfaces from sending OSPF packets.

interface-type interface-number: Interface type and interface number.

Description

Use the silent-interface command to disable an interface or all interfaces from sending OSPF packets.

Use the undo silent-interface command to restore the default.

By default, an interface sends OSPF packets.

A disabled interface is a passive interface, which cannot send any hello packet.

To make no routing information obtained by other routers on a network segment, you can use this command to disable the interface from sending OSPF packets.

Examples

# Disable an interface from sending OSPF packets.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] silent-interface vlan-interface 10

3.1.63 snmp-agent trap enable ospf

Syntax

View

System view

Parameters

process-id: OSPF process ID, in the range 1 to 65535.

ifauthfail: Interface authentication failure information.

ifcfgerror: Interface configuration error information.

ifrxbadpkt: Information about error packets received.

ifstatechange: Interface state change information.

iftxretransmit: Packet receiving and forwarding information.

lsdbapproachoverflow: Information about cases approaching LSDB overflow.

lsdboverflow: LSDB overflow information.

maxagelsa: LSA max age information.

nbrstatechange: Neighbor state change information.

originatelsa: Information about LSAs originated locally.

vifauthfail: Virtual interface authentication failure information.

vifcfgerror: Virtual interface configuration error information.

virifauthfail: Virtual interface authentication failure information.

virifrxbadpkt: Information about error packets received by virtual interfaces.

virifstatechange: Virtual interface state change information.

viriftxretransmit: Virtual interface packet retransmission information.

virnbrstatechange: Virtual interface neighbor state change information.

Description

Use the snmp-agent trap enable ospf command to enable the sending of SNMP traps for a specified OSPF process. If no process is specified, the feature is enabled for all processes.

Use the undo snmp-agent trap enable ospf command to disable the feature.

By default, this feature is enabled.

Refer to SNMP-RMON Commands for related information.

Examples

# Enable the sending of SNMP traps for all OSPF processes.

<Sysname> system-view

[Sysname] snmp-agent trap enable ospf

3.1.64 spf-schedule-interval

Syntax

spf-schedule-interval maximum-interval [ minimum-interval [ incremental-interval ] ]

undo spf-schedule-interval

View

OSPF view

Parameters

maximum-interval: Maximum SPF calculation interval in seconds, in the range 1 to 60.

minimum-interval: Minimum SPF calculation interval in milliseconds, in the range 10 to 60000, which defaults to 0.

incremental-interval: Incremental value in milliseconds, in the range 10 to 60000, which defaults to 5000.

Description

Use the spf-schedule-interval command to set the OSPF SPF calculation interval.

Use the undo spf-schedule-interval command to restore the default.

The interval defaults to 5 seconds.

Based on its LSDB, an OSPF router calculates the shortest path tree with itself being the root, and uses it to determine the next hop to a destination. Through adjusting the SPF calculation interval, you can protect bandwidth and router resources from being over-consumed due to frequent network changes.

With this command configured, when network changes are not frequent, SPF calculation applies at the minimum-interval. If network changes become frequent, the SPF calculation interval is incremented by the incremental-interval each time a calculation happens, up to the maximum-interval.

Examples

# Configure the SPF calculation maximum interval as 10 seconds, minimum interval as 500 milliseconds and incremental interval as 200 milliseconds.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] spf-schedule-interval 10 500 200

3.1.65 stub

Syntax

stub [ no-summary ]

undo stub

View

OSPF area view

Parameters

no-summary: Usable only on a stub ABR. With it configured, the ABR advertises only a default route in a Summary LSA into the stub area (such a stub area is known as a totally stub area).

Description

Use the stub command to configure an area as a stub area.

Use the undo stub command to remove the configuration.

No area is stub area by default. To configure an area as a stub area, all routers attached to it must be configured with this command.

Note that, to concel the no-summary configuration on the ABR, simply execute the stub command again to overwrite it.

Related commands: default-cost.

Examples

# Configure Area1 as a stub area.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] area 1

[Sysname-ospf-100-area-0.0.0.1] stub

3.1.66 stub-router

Syntax

stub-router

undo stub-router

View

OSPF view

Parameters

None

Description

Use the stub-router command to configure the router as a stub router.

Use the undo stub-router command to restore the default.

By default, no router is configured as a stub router.

The router LSAs from the stub router may contain different link type values. A value of 3 means a link to the stub network, so the cost of the link remains unchanged. A value of 1, 2 or 4 means a point-to-point link, a link to a transit network or a virtual link; in such cases, a maximum cost value of 65535 is used. Thus, other neighbors find the links to the stub router have such big costs, they will not send packets to the stub router for forwarding as long as there is a route with a smaller cost.

Examples

# Configure a stub router.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] stub-router

3.1.67 vlink-peer

Syntax

vlink-peer router-id [ hello seconds | retransmit seconds | trans-delay seconds | dead seconds | simple [ plain | cipher ] password | { md5 | hmac-md5 } key-id [ plain | cipher ] password ]*

undo vlink-peer router-id [ hello | retransmit | trans-delay | dead | [ simple | { md5 | hmac-md5 } key-id ] ]*

View

OSPF area view

Parameters

router-id: Router ID of the neighbor on the virtual link.

hello seconds: Hello interval in seconds, in the range 1 to 8192. The default is 10. It must be identical to the hello interval on its virtual link neighbor.

retransmit seconds: Retransmission interval in seconds, in the range 1 to 3600, which defaults to 5.

trans-delay seconds: Transmission delay interval in seconds, in the range 1 to 3600, which defaults to 1.

dead seconds: Dead interval in seconds, in the range 1 to 32768, which defaults to 40 and is identical to the value on its virtual link neighbor. The dead interval is at least four times the hello interval.

md5: MD5 authentication.

hmac-md5: HMAC-MD5 authentication.

simple: Simple authentication.

key-id: Key ID for MD5 or HMAC-MD5 authentication, in the range 1 to 255.

plain | cipher: Plain or cipher type. If plain is specified, only plain password is supported and displayed upon displaying the configuration file. If cipher is specified, both plain and cipher are supported, but only cipher password is displayed when displaying the configuration file. By default, MD5 and HMAC-MD5 support cipher password, and simple authentication supports plain password.

password: Plain or cipher password. Simple authentication: For plain type, a plain password is a string of up to 8 characters. For cipher type, a plain password is a string of up to 8 characters, and a cipher password is a string of up to 24 characters. MD5/HMAC-MD5 authentication: For plain type, a plain password is a string of up to 16 characters. For cipher type, a plain password is a string of up to 16 characters, and a cipher password is a string of up to 24 characters.

Description

Use the vlink-peer command to configure a virtual link.

Use the undo vlink-peer command to remove a virtual link.

As defined in RFC2328, all non-backbone areas must maintain connectivity to the backbone. You can use the vlink-peer command to configure a virtual link to connect an area to the backbone.

Considerations on parameters:

l The smaller the hello interval is, the faster the network converges and the more network resources are consumed.

l A so small retransmission interval will lead to unnecessary retransmissions. A big value is appropriate for a low speed link.

l You need to specify an appropriate transmission delay with the trans-delay keyword.

The authentication mode at the non-backbone virtual link end follows the one at the backbone virtual link end. The two authentication modes (MD5 or Simple) are independent, and you can specify neither of them.

Related commands: authentication-mode, display ospf.

Examples

# Configure a virtual link to the neighbor with router ID 1.1.1.1.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] area 2

[Sysname-ospf-100-area-0.0.0.2] vlink-peer 1.1.1.1

Chapter 4 IS-IS Configuration Commands

& Note:

The “router” in this document refers to a router in a generic sense or an Ethernet switch running routing protocols.

4.1 IS-IS Configuration Commands

4.1.1 area-authentication-mode

Syntax

area-authentication-mode { simple | md5 } password [ ip | osi ]

undo area-authentication-mode

View

IS-IS view

Parameters

simple: Specifies to send the password in plain text.

md5: Specifies to send the password encrypted with MD5.

password: Password to be set. For simple authentication mode, the password must be plain text. For md5 authentication mode, the password can be either plain text or ciphertext. A plaintext password can be a string of up to 16 characters, such as user918. A cipher password must be a ciphertext string of up to 24 characters, such as (TT8F]Y\5SQ=^Q`MAF4<1!!.

ip: Specifies the system to check the configuration for the corresponding field of IP in LSP.

osi: Specifies the system to check the configuration for the corresponding field of OSI in LSP.

& Note:

Whether a password should use ip or osi is not affected by the actual network environment.

Description

Use the area-authentication-mode command to specify the area authentication mode and a password. The password in the specified mode is inserted into all outgoing Level-1 packets (LSP, CSNP and PSNP) and is used for authenticating the incoming Level-1 packets.

Use the undo area-authentication-mode command to restore the default.

No area authentication mode is specified by default, that is, the system will neither authenticate incoming Level-1 packets nor set password for outgoing Level-1 packets.

With area authentication mode configured, the system will discard incoming routes from untrusted routers.

Related commands: reset isis all, domain-authentication-mode, isis authentication-mode

Examples

# Set the area authentication password to hello, and the authentication mode to simple.

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1] area-authentication-mode simple hello

4.1.2 auto cost enable

Syntax

auto-cost enable

undo auto-cost enable

View

IS-IS view

Parameters

None

Description

Use the auto-cost enable command to enable interfaces of the current IS-IS process to calculate interface cost automatically.

Use the undo auto-cost enable command to disable the function.

This function is disabled by default.

The preference of interface cost set by the auto-cost command is lower than that set by the circuit-cost command. The preference from high to low is: the cost set by the isis cost command, the global cost set by the circuit cost command, the cost automatically calculated and the default cost.

When the cost-style is wide or wide-compatible, the cost value of an interface is calculated by using the following formula:

cost = (reference value/bandwidth)×10.

Related commands: bandwidth-reference, cost-style.

Examples

# Enable interfaces of IS-IS process 1 to calculate interface cost automatically.

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1] auto-cost enable

4.1.3 bandwidth-reference

Syntax

bandwidth-reference value

undo bandwidth-reference

View

IS-IS view

Parameters

value: Bandwidth reference value in Mbps, ranging from 1 to 2147483648.

Description

Use the bandwidth-reference command to set the bandwidth reference value for calculating link cost.

Use the undo bandwidth-reference command to restore the default.

By default, the reference value is 100 Mbps.

In the case no interface cost is specified in interface view or system view and automatic cost calculation is enabled:

l When the cost style is wide or wide-compatible, IS-IS automatically calculates the interface cost based on the interface bandwidth, using the formula: interface cost = (reference value/bandwidth)×10, and the maximum calculated cost is 16777214.

l When the cost style is narrow, narrow-compatible, or compatible, if the interface is a loopback interface, the cost value is 0; otherwise, the cost value is automatically calculated as follows: if the interface bandwidth is in the range of 1 M to 10 M, the interface cost is 60; if the interface bandwidth is in the range of 11 M to 100 M, the interface cost is 50; if the interface bandwidth is in the range of 101 M to 155 M, the interface cost is 40; if the interface bandwidth is in the range of 156 M to 622 M, the interface cost is 30; if the interface bandwidth is in the range of 623 M to 2500 M, the interface cost is 20, and the default interface cost of 10 is used for any other bandwidths.

Related commands: auto-cost enable.

Examples

# Configure the bandwidth reference of IS-IS process 1 as 200 Mbps.

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1] bandwidth-reference 200

4.1.4 circuit-cost

Syntax

circuit-cost value [ level-1 | level-2 ]

undo circuit-cost [ level-1 | level-2 ]

View

IS-IS view

Parameters

value: Specifies the global link cost value. The value range varies with cost types.

l For types narrow, narrow-compatible and compatible: The cost value ranges from 0 to 63.

l For types wide and wide-compatible: The cost value ranges from 0 to 16777215.

level-1: Applies the link cost to Level-1.

level-2: Applies the link cost to Level-2.

Description

Use the circuit-cost command to set a global link cost.

Use the undo circuit-cost command to restore the default.

By default, the global link cost is not configured.

If no keyword is specified, the specified cost applies to Level-1-2.

The preference of interface cost from high to low is: the cost set by the isis cost command, the global cost set by the circuit-cost command, the cost automatically calculated (auto-cost) and the default cost.

Related commands: isis cost, cost-style.

Examples

# Set the global Level-1 link cost of IS-IS process 1 to 11.

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1] circuit-cost 11 level-1

4.1.5 cost-style

Syntax

cost-style { narrow | wide | wide-compatible | { compatible | narrow-compatible } [ relax-spf-limit ] }

undo cost-style

View

IS-IS view

Parameters

narrow: Specifies to receive and send only packets of narrow cost style (The narrow cost ranges from 0 to 63).

wide: Specifies to receive and send only packets of wide cost style (The wide cost ranges from 0 to 16777215).

compatible: Specifies to receive and send both wide and narrow style packets.

narrow-compatible: Specifies to receive both narrow and wide style packets, but send only narrow style packets.

wide-compatible: Specifies to receive both narrow and wide style packets, but send only wide style packets.

relax-spf-limit: Specifies to allow receiving routes with cost bigger than 1023. If this keyword is not configured, any route with cost bigger than 1023 will be discarded. This keyword is only available when keywords compatible and narrow-compatible are included.

Description

Use the cost-style command to set the cost style of packets.

Use the undo cost-style command to restore the default.

Only packets of narrow cost style can be received and sent by default.

Related commands: isis cost.

Examples

# Configure the router to send only packets of narrow cost style, but receive both narrow and wide cost style ones.

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1] cost-style narrow-compatible

4.1.6 default-route-advertise

Syntax

default-route-advertise [ route-policy route-policy-name | [ level-1 | level-2 | level-1-2 ] ] *

undo default-route-advertise [ route-policy route-policy-name ]

View

IS-IS view

Parameters

route-policy-name: Specifies the name of a routing policy, a string of 1 to 19 characters.

level-1: Specifies the level of the default route as Level-1.

level-2: Specifies the level of the default route as Level-2.

level-1-2: Specifies the level of the default route as Level-1-2.

& Note:

If no level is specified, a Level-2 default route is generated.

Description

Use the default-route-advertise command to generate a Level-1 or Level-2 default route.

Use the undo default-route-advertise command to disable the function.

This function is disabled by default.

The Level-1 default route is advertised to other routers in the same area, while the Level-2 default route is advertised to all the Level-2 and Level-1-2 routers.

Using the apply isis level-1 command in routing policy view will generate a default route in L1 LSP. Using the apply isis level-2 command in routing policy view will generate a default route in L2 LSP. Using the apply isis level-1-2 command in routing policy view will generate a default route in L1 LSP and L2 LSP respectively.

Examples

# Generate a default route in L2 LSP.

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1] default-route-advertise

4.1.7 display isis brief

Syntax

display isis brief [ process-id ]

View

Any view

Parameters

process-id: IS-IS process ID, in the range of 1 to 65535.

Description

Use the display isis brief command to view brief IS-IS configuration information.

Examples

# Display brief IS-IS configuration information.

<Sysname> display isis brief

ISIS (1) Protocol Brief Information :

network-entity:

10.0000.0000.0001.00

is-level :level-1-2

cost-style: narrow

preference : 15

Lsp-length receive : 1497

Lsp-length originate : level-1 1497

level-2 1497

Timers:

spf-slice-size: 0

lsp-max-age: 1200

lsp-refresh: 900

Interval between SPFs: 10

Table 4-1 Description on the fields of the display isis brief command

Field	Description
network-entity	Network entity name
is-level	IS-IS Routing level
cost-style	Cost style
preference	Preference
Lsp-length receive	Maximum LSP that can be received
Lsp-length originate	Maximum LSP that can be generated
Timers	Timers
spf-slice-size	Time of each SPF calculation slice (0 means SPF calculation time is not split.)
lsp-max-age	Maximum life period of LSP
lsp-refresh	Refresh period of LSP
Interval between SPFs	Interval between SPF calculations

4.1.8 display isis graceful-restart status

Syntax

display isis graceful-restart status [ level-1 | level-2 ] [ process-id ]

View

Any view

Parameters

level-1: Displays the IS-IS Level-1 Graceful Restart state.

level-2: Displays the IS-IS Level-2 Graceful Restart state.

process-id: IS-IS Process ID, in the range 1 to 65535.

Description

Use the display isis graceful-restart status command to display IS-IS Graceful Restart status.

Examples

# Display IS-IS Graceful Restart status.

<Sysname> display isis graceful-restart status

Restart information for ISIS(1)

-------------------------------

IS-IS(1) Level-1 Restart Status

Restart Interval: 300

SA Bit Supported

Total Number of Interfaces = 1

Restart Status: RESTARTING

T3 Timer Status:

Remaining Time: 65535

T2 Timer Status:

Remaining Time: 59

Interface Vlan1

T1 Timer Status:

Remaining Time: 1

RA Not Received

Complete CSNP Not Received

Number of T1 Pre Expiry: 0

IS-IS(1) Level-2 Restart Status

Restart Interval: 300

SA Bit Supported

Total Number of Interfaces = 1

Restart Status: RESTARTING

T3 Timer Status:

Remaining Time: 65535

T2 Timer Status:

Remaining Time: 59

Interface Vlan1

T1 Timer Status:

Remaining Time: 1

RA Not Received

Complete CSNP Not Received

Number of T1 Pre Expiry: 0

Table 4-2 Description on the fields of the display isis graceful-restart status command

Field	Description
Restart Interval	Graceful Restart interval
SA Bit Supported	The SA bit is set
Total Number of Interfaces = 1	The current IS-IS interface number
Restart Status:	Graceful Restart status
T3 Timer Status	Remaining time of T3 timer
T2 Timer Status:	Remaining time of T2 Timer
Interface Vlan1	Interface to which the T1 timer belongs
T1 Timer Status	Remaining time of T1 Timer
RA Not Received	The response from the GR Helper is not received.
Complete CSNP Not Received	The CSNP packets are not completely received from the GR Helper
Number of T1 Pre Expiry	Number of T1 timer expiries

4.1.9 display isis interface

Syntax

display isis interface [ verbose ] [ process-id ]

View

Any view

Parameters

verbose: Displays IS-IS interface detail information.

process-id: IS-IS process ID, in the range of 1 to 65535.

Description

Use the display isis interface command to display IS-IS interface information.

The information displayed by this command includes interface name, interface IP address, interface link state and so on. Besides all the information displayed by display isis interface, using the display isis interface verbose command displays other interface related information, such as CSNP packets broadcast intervals, Hello packets broadcast intervals and the number of invalid Hello packets.

Examples

# Display IS-IS enabled interface information.

<Sysname> display isis interface

Interface information for ISIS(1)

---------------------------------

Interface: Vlan-interface1

Id IPV4.State IPV6.State MTU Type DIS

001 Up Down 1497 L1/L2 No/No

# Display detailed IS-IS enabled interface information.

<Sysname> display isis interface verbose

Interface information for ISIS(1)

---------------------------------

Interface: Vlan-interface1

Id IPV4.State IPV6.State MTU Type DIS

001 Up Down 1497 L1/L2 No/No

SNPA Address : 000f-e200-2201

IP Address : 192.168.0.136

Secondary IP Address(es) :

IPV6 Link Local Address :

IPV6 Global Address(es) :

Csnp Timer Value : L1 10 L2 10

Hello Timer Value : L1 10 L2 10

Hello Multiplier Value : L1 3 L2 3

Lsp Timer Value : L12 33

Cost : L1 10 L2 10

Priority : L1 64 L2 64

Retransmit Timer Value : L12 5

Table 4-3 Description on the fields of the display isis interface command

Field	Description
Interface	Interface
Id	Circuit ID
IPV4.State	IPv4 state
IPV6.State	IPv6 state
MTU	Interface MTU
Type	Interface link type
DIS	Designated IS
SNPA Address	Subnet access point address
IP Address	Primary IP address
Secondary IP Address(es)	Secondary IP addresses
IPV6 Link Local Address	IPv6 link local address
IPV6 Global Address(es)	IPv6 global address
Csnp Timer Value	Interval for sending CSNP packets
Hello Timer Value	Interval for sending Hello packets
Hello Multiplier Value	Number of invalid Hello packets
Lsp Timer Value	Interval for sending LSP packets
Cost	Cost
Priority	Preference
Retransmit Timer Value	LSP retransmission interval over point-to-point link

4.1.10 display isis license

Syntax

display isis license

View

Any view

Parameters

None

Description

Use the display isis license command to display the information of the IS-IS license.

Examples

# Display the information of the IS-IS license.

<Sysname> display isis license

ISIS Shell License Values

_________________________

Feature Name Active Controllable

ISIS Protocol YES YES

IPV6 YES YES

RESTART YES YES

TE NO NO

MI NO NO

Resource Name MinVal MaxVal CurrVal Controllable

Max Processes Resource 1 1000 100 1

Max Paths Resource 1 4 4 1

Max IPv4 Rt Resource 8192 12288 12288 1

Max IPv6 Rt Resource 1 6144 6144 0

ISIS Core License Values

________________________

Feature Name Active

ISIS Protocol YES

IPV6 YES

RESTART YES

TE NO

MI NO

Resource Name Current Value

Max Processes Resource 100

Max Paths Resource 4

Max IPv4 Rt Resource 12288

Max IPv6 Rt Resource 6144

Table 4-4 Description on the fields of the display isis license command

Field	Description
ISIS Shell License Values	License values of ISIS shell
Feature Name	Feature name
Active	Whether the state is active.
Controllable	Whether support reading configuration through License file.
ISIS Protocol	IS-IS Protocol
IPV6	Whether IPv6 is active or not.
RESTART	Graceful Restart (GR)
TE	Traffic Engineering
MI	Multi-instance
Resource Name	Resource name
MinVal	Minimum value
MaxVal	Maximum value
CurrVal	Current value
ISIS Core License Values	License values of ISIS Core
Max Processes Resource	Maximum number of processes supported
Max Paths Resource	Maximum equal cost paths
Max IPv4 Rt Resource	Maximum IPv4 routes supported
Max IPv6 Rt Resource	Maximum IPv6 routes supported

4.1.11 display isis lsdb

Syntax

View

Any view

Parameters

l1, level-1: Specifies level-1 LSDB.

l2, level-2: Specifies level-2 LSDB.

LSPID: LSP ID, in the form of sysid. Pseudo ID-fragment num.

lspname: LSP name, in the form of Symbolic name.[Pseudo ID]-fragment num.

local: Displays LSP information generated locally.

verbose: Displays LSDB detailed information.

process-id: IS-IS process ID, in the range of 1 to 65535.

& Note:

If no level is specified, then both Level-1 and Level-2 (or Level-1-2) link state databases are displayed by default.

Description

Use the display isis lsdb command to display IS-IS link state database.

Examples

# Display Level-1 LSDB information.

<Sysname> dis isis lsdb level-1

Database information for ISIS(1)

--------------------------------

Level-1 Link State Database

LSPID Seq Num Checksum Holdtime Length ATT/P/OL

--------------------------------------------------------------------------

bbbb.cccc.dddd.00-00* 0x0000001d 0x165 820 36 1/0/0

*-Self LSP, +-Self LSP(Extended), ATT-Attached, P-Partition, OL-Overload

Table 4-5 Description on the fields of the display isis lsdb command

Field	Description
LSPID	Link state packet ID
Seq Num	LSP sequence number
Checksum	LSP checksum
Holdtime	LSP holdtime
Length	LSP length
ATT/P/OL	Attach bit (ATT) Partition bit (P) Overload bit (OL)

4.1.12 display isis mesh-group

Syntax

display isis mesh-group [ process-id ]

View

Any view

Parameters

process-id: Specifies an IS-IS process ID, in the range of 1 to 65535.

Description

Use the display isis mesh-group command to display IS-IS mesh-group.

Examples

# Configure VLAN-interface 10 and VLAN-interface 20 on a switch to belong to mesh-group 100. (The process to establish VLAN-interface 10 and VLAN-interface 20 is omitted.)

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] isis mesh-group 100

[Sysname-Vlan-interface10] quit

[Sysname] interface vlan-interface 20

[Sysname-Vlan-interface20] isis mesh-group 100

# Display the configuration information of IS-IS mesh-group.

[Sysname-Vlan-interface20] display isis mesh-group

Mesh Group information for ISIS(1)

----------------------------------

Interface Status

Vlan10 100

Vlan20 100

Table 4-6 Description on the fields of the display isis mesh-group command

Field	Description
Interface	Interface name
Status	Mesh-group number of the interface

4.1.13 display isis name-table

Syntax

display isis name-table [ process-id ]

View

Any view

Parameters

process-id: IS-IS process ID, in the range of 1 to 65535.

Description

Use the display isis name-table command to display the host name-to-system ID mapping table.

Examples

# Configure a name for the local IS-IS system.

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1] is-name RUTA

# Configure a static mapping for the remote IS-IS system (0000.0000.0041).

[Sysname-isis-1] is-name map 0000.0000.0041 RUTB

# Display the IS-IS host name-to-system ID mapping table.

[Sysname-isis-1] display isis name-table

Name table information for ISIS(1)

---------------------------------------------------------------

System ID Hostname Type

6789.0000.0001 RUTA DYNAMIC

0000.0000.0041 RUTB STATIC

Table 4-7 Description on the fields of the display isis name-table command

Field	Description
System ID	System ID
Hostname	Hostname name of the system ID
Type	Mapping type of system ID to host name (static or dynamic)

4.1.14 display isis peer

Syntax

display isis peer [ verbose ] [ process-id ]

View

Any view

Parameters

verbose: When this parameter is used, the area address advertised in a neighbor’s Hello packet will be displayed. Otherwise the system displays only the summary information.

process-id: Specifies an IS-IS process ID, in the range of 1 to 65535.

Description

Use the display isis peer command to display IS-IS neighbor information.

Besides all the information displayed using the display isis peer command, the display isis peer verbose command displays neighbor area address, hold time of Up state and direct interface’s IP address.

Examples

# Display detailed IS-IS neighbor information.

<Sysname> display isis peer verbose

Peer information for ISIS(1)

----------------------------

System Id: 1010.1020.1031

Interface: Vlan-interface1 Circuit Id: 1010.1020.1031.01

State: Up HoldTime: 7s Type: L1(L1L2) PRI: 64

Area Address(es):10.0001

Peer IP Address(es): 192.168.0.156

Uptime: 00:05:45

Adj Protocol: IPV4

System Id: 1010.1020.1031

Interface: Vlan-interface1 Circuit Id: 1010.1020.1031.01

State: Up HoldTime: 7s Type: L2(L1L2) PRI: 64

Area Address(es):10.0001

Peer IP Address(es): 192.168.0.156

Uptime: 00:05:45

Adj Protocol: IPV4

Table 4-8 Description on the fields of the display isis peer command

Field	Description
System Id	System ID
Interface	Interface connecting to the neighbor
Circuit Id	Circuit ID
State	State
HoldTime	Holdtime
Type	Type of the neighbor
PRI	DIS Priority
Area Address(es)	The neighbor’s area address
Peer IP Address(es)	Interface IP address of the neighbor
Uptime	Time being up
Adj Protocol	Adjacency protocol

4.1.15 display isis route

Syntax

display isis route [ ipv4 ] [ [ level-1 | level-2 ] | verbose ] * [ process-id ]

View

Any view

Parameters

ipv4: Displays IS-IS IPv4 routing information (the default).

verbose: Displays IS-IS detailed IPv4 routing information.

process-id: Specifies an IS-IS process ID, in the range of 1 to 65535.

level-1: Displays Level-1 IS-IS routes.

level-2: Displays Level-2 IS-IS routes.

& Note:

If no level is specified, then both Level-1 and Level-2 (Level-1-2) routing information will be displayed.

Description

Use the display isis route command to display IS-IS IPv4 routing information.

Examples

# Display IS-IS IPv4 routing information

<Sysname> display isis route 1

Route information for ISIS(1)

-----------------------------

ISIS(1) IPv4 Level-1 Forwarding Table

-------------------------------------

IPV4 Destination IntCost ExtCost ExitInterface NextHop Flags

--------------------------------------------------------------------------

192.168.0.0/24 10 NULL Vlan1 Direct D/L/-

Flags: D-Direct, R-Added to RM, L-Advertised in LSPs, U-Up/Down Bit Set

ISIS(1) IPv4 Level-2 Forwarding Table

-------------------------------------

IPV4 Destination IntCost ExtCost ExitInterface NextHop Flags

--------------------------------------------------------------------------

192.168.0.0/24 10 NULL Vlan1 Direct D/L/-

Flags: D-Direct, R-Added to RM, L-Advertised in LSPs, U-Up/Down Bit Set

Table 4-9 Description on the fields of the display isis route command

Field	Description
IPV4 Destination	IPv4 destination address
IntCost	Interior routing cost
ExtCost	Exterior routing cost
ExitInterface	Exit interface
NextHop	Next hop
Flags	Routing state flag D: Direct route. R: The route has been added into the routing table. L: The route has been broadcasted. U: A route’s penetration flag. Setting it to UP can prevent an LSP sent from L2 to L1 from being sent back to L2.

4.1.16 display isis spf-log

Syntax

display isis spf-log [ process-id ]

View

Any view

Parameters

process-id: Specifies an IS-IS process ID, in the range of 1 to 65535.

Description

Use the display isis spf-log command to display IS-IS SPF log record.

Examples

# Display IS-IS SPF log record.

<Sysname> display isis spf-log

SPF Log information for ISIS(1)

-------------------------------

Level Trig.Event No.Nodes Duration StartTime

L2 IS_SPFTRIG_PERIODIC 2 0 13:3:24

L1 IS_SPFTRIG_PERIODIC 2 0 13:18:8

L2 IS_SPFTRIG_PERIODIC 2 0 13:18:8

L1 IS_SPFTRIG_PERIODIC 2 0 13:32:28

L2 IS_SPFTRIG_PERIODIC 2 0 13:32:28

L1 IS_SPFTRIG_PERIODIC 2 0 13:44:0

L2 IS_SPFTRIG_PERIODIC 2 0 13:44:0

L1 IS_SPFTRIG_PERIODIC 2 0 13:55:43

-->L2 IS_SPFTRIG_PERIODIC 2 0 13:55:43

L1 IS_SPFTRIG_PERIODIC 2 0 11:54:12

L2 IS_SPFTRIG_PERIODIC 2 0 11:54:12

L1 IS_SPFTRIG_PERIODIC 2 0 12:7:24

L2 IS_SPFTRIG_PERIODIC 2 0 12:7:24

L1 IS_SPFTRIG_PERIODIC 2 0 12:21:24

L2 IS_SPFTRIG_PERIODIC 2 0 12:21:24

L1 IS_SPFTRIG_PERIODIC 2 0 12:35:24

L2 IS_SPFTRIG_PERIODIC 2 0 12:35:24

L1 IS_SPFTRIG_PERIODIC 2 0 12:49:24

L2 IS_SPFTRIG_PERIODIC 2 0 12:49:24

L1 IS_SPFTRIG_PERIODIC 2 0 13:3:24

Table 4-10 Description on the fields of the display isis spf-log command

Field	Description
Level	SPF calculation level
Trig.Event	SPF triggered event
No.Nodes	Number of SPF calculation nodes
Duration	SPF calculation duration
StartTime	SPF calculation start time

4.1.17 display isis statistics

Syntax

display isis statistics [ level-1 | level-2 | level-1-2 ]

View

Any view

Parameters

level-1: IS-IS Level-1 statistic information.

level-2: IS-IS Level-2 statistic information.

level-1-2: IS-IS Level-1-2 statistic information.

process-id: Specifies an IS-IS process ID, in the range of 1 to 65535.

Description

Use the display isis statistics command to display the statistic information of IS-IS process, including the number of routes learned from other IS-IS routers, the number of routes redistributed from other protocols and the number of LSP generated locally.

Examples

# Display IS-IS statistics.

<Sysname> display isis statistics

Statistics information for ISIS(1)

----------------------------------

Level-1 Statistics

------------------

Learnt routes information:

Total IPv4 Learnt Destinations: 4

Total IPv6 Learnt Destinations: 0

Imported routes information:

IPv4 Imported Routes:

Static: 0 Direct: 0

ISIS: 0 BGP: 0

RIP: 0 OSPF: 0

IPv6 Imported Routes:

Static: 0 Direct: 0

ISISv6: 0 BGP4+: 0

RIPng: 0 OSPFv3: 0

Lsp information:

LSP Source ID: No. of used LSPs

0000.0000.0002 001

Table 4-11 Description on the fields of the display isis statistics command

Field		Description
Statistics information for ISIS(processid)		Statistics for the ISIS process
Level-1 Statistics		Level-1 Statistics
Level-2 Statistics		Level-2 Statistics
Learnt routes information		Number of learnt IPv4 routes Number of learnt IPv6 routes
Imported routes information	IPv4 Imported Routes	Redistributed IPv4 routes l Static l Direct l ISIS l BGP l RIP l OSPF
Imported routes information	IPv6 Imported Routes	Redistributed IPv6 routes l Static l Direct l ISISv6 l BGP4+ l RIPng l OSPFv3
Lsp information		LSP information l LSP Source ID: ID of the source system l No. of used LSPs: number of used LSPs

4.1.18 domain-authentication-mode

Syntax

domain-authentication-mode { simple | md5 } password [ ip | osi ]

undo domain-authentication-mode

View

IS-IS view

Parameters

simple: Specifies to send the password in plain text.

md5: Specifies to send the password encrypted with MD5.

password: Specifies a password. For simple authentication mode, the password must be plain text. For md5 authentication mode, the password can be either plain text or cipher text. A plain text password is a string of up to 16 characters, such as user918. A cipher password must be a string of 24 characters, such as _(TT8F]Y\5SQ=^Q`MAF4<1!!.

ip: Specifies to check the IP related fields in a LSP.

osi: Specifies to check the OSI related fields in a LSP.

Whether a password should use ip or osi is not affected by the actual network environment.

Description

Use the domain-authentication-mode command to specify the routing domain authentication mode and a password. The password in the specified mode is inserted into all outgoing Level-2 packets (LSP, CSNP and PSNP) and is used for authenticating the incoming Level-2 packets.

Use the undo domain-authentication-mode command to disable the authentication.

No domain authentication mode is specified by default, that is, the system neither authenticates incoming Level-2 packets nor sets password for outgoing Level-2 packets.

Related commands: area-authentication-mode, isis authentication-mode.

Examples

# Use the simple mode and password 123456 to authenticate level-2 routing packets.

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1] domain-authentication-mode simple 123456

4.1.19 filter-policy export

Syntax

filter-policy { acl-number | ip-prefix ip-prefix-name | route-policy route-policy-name } export [ isis process-id | ospf process-id | rip process-id | bgp | direct | static]

View

IS-IS view

Parameters

acl-number: Specifies the number of an ACL that is used to filter outgoing redistributed routes, ranging from 2000 to 3999.

ip-prefix ip-prefix-name: Specifies the name of an IP prefix list that is used to filter outgoing redistributed routes, a string of 1 to 19 characters.

route-policy route-policy-name: Specifies the name of a routing policy that is used to filter outgoing redistributed routes, a string of 1 to 19 characters.

isis process-id: Filters outgoing routes redistributed from an IS-IS process. The process ID is in the range of 1 to 65535.

ospf process-id: Filters outgoing routes redistributed from an OSPF process. The process ID is in the range of 1 to 65535.

rip process-id: Filters outgoing routes redistributed from a RIP process. The process ID is in the range of 1 to 65535.

bgp: Filters outgoing routes redistributed from BGP.

direct: Filters outgoing redistributed direct routes.

static: Filters outgoing redistributed static routes.

If no parameter is specified, the system will filter all outgoing redistributed routing information.

Description

Use the filter-policy export command to configure IS-IS to filter outgoing redistributed routes.

Use the undo filter-policy export command to disable IS-IS from filtering outgoing redistributed routes.

IS-IS does not filter outgoing redistributed routes by default.

In some cases, only redistributed routing information satisfying certain conditions can be advertised. You can use the filter-policy command to reference filtering conditions.

Related commands: filter-policy import.

Examples

# Reference ACL 2000 to filter outgoing redistributed routes.

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1] filter-policy 2000 export

4.1.20 filter-policy import

Syntax

filter-policy { acl-number | ip-prefix ip-prefix-name | route-policy route-policy-name } import

undo filter-policy import

View

IS-IS view

Parameters

acl-number: Specifies the number of an ACL that is used to filter incoming routes, ranging from 2000 to 3999.

ip-prefix ip-prefix-name: Specifies the name of an IP prefix list that is used to filter incoming routes, a string of 1 to 19 characters.

route-policy route-policy-name: Specifies the name of a routing policy that is used to filter incoming routes, a string of 1 to 19 characters.

Description

Use the filter-policy import command to configure IS-IS to filter incoming routing information.

Use the undo filter-policy import command to disable IS-IS from filtering incoming routing information.

IS-IS does not filter incoming routing information by default.

In some cases, only the routing information satisfying certain conditions can be received. You can reference filtering conditions using the filter-policy command.

Related commands: filter-policy export.

Examples

# Reference ACL 2000 to filter incoming routing information.

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1] filter-policy 2000 import

4.1.21 flash-flood

Syntax

flash-flood [ flood-count flooding-count | max-timer-interval flooding-interval | [ level-1 | level-2 ] ] *

undo flash-flood [ level-1 | level-2 ]

View

IS-IS view

Parameters

flood-count flooding-count: Specifies the maximum number of LSPs to be sent in the fast-flooding process, ranging from 1 to 15. The default is 5.

max-timer-interval flooding-interval: Specifies the delay interval (in milliseconds) between when it is enabled and when it begins, ranging from 10 to 50000. The default is 10.

level-1: Specifies to configure fast-flooding on level-1 only.

level-2: Specifies to configure fast-flooding on level-2 only. If no level is configured, the fast-flooding will be available on both level-1 and level-2 by default.

Description

Use the flash-flood command to enable IS-IS LSP fast flooding and configure related parameters, including the maximum number of LSPs to be sent and the delay time before flooding.

Use the undo flash-flood command to disable fast-flooding.

Fast flooding is disabled by default.

Using this command can speed up LSP flooding that is triggered by topology changes, so as to reduce LSDB convergence time.

Examples

# Enable fast flooding and configure the maximum LSPs be sent as 10 and the delay time as 100 milliseconds.

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1] flash-flood flood-count 10 max-timer-interval 100

4.1.22 graceful-restart

Syntax

graceful-restart

undo graceful-restart

View

IS-IS view

Parameters

None

Description

Use the graceful-restart command to enable IS-IS Graceful Restart capability.

Use the undo graceful-restart command to disable IS-IS Graceful Restart capability.

By default, IS-IS Graceful Restart capability is disabled.

Examples

# Enable the Graceful Restart capability for IS-IS process 1.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] graceful-restart

4.1.23 graceful-restart interval

Syntax

graceful-restart interval interval-value

undo graceful-restart interval

View

IS-IS view

Parameters

interval-value: Graceful Restart interval, in the range 30 to 1800 seconds.

Description

Use the graceful-restart interval command to configure the Graceful Restart interval.

Use the undo graceful-restart interval command to restore the default Graceful Restart interval.

By default, the Graceful Restart interval is 300 seconds.

Examples

# Configure the Graceful Restart interval for IS-IS process 1 as 120 seconds.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] graceful-restart interval 120

4.1.24 graceful-restart suppress-sa

Syntax

graceful-restart suppress-sa

undo graceful-restart suppress-sa

View

IS-IS view

Parameters

None

Description

Use the graceful-restart suppress-sa command to set the SA (Suppress-Advertisement) bit during restart.

Use the undo graceful-restart suppress-sa command to clear the SA bit.

By default, the SA bit is cleared during restart.

Note that:

l For a router that has restarted IS-IS, copies of LSPs generated by this router during the previous incarnation may still exist in the lSP databases of other routers in the network.

l Copies of LSPs in the LSP databases in other routers which may look “newer” than LSPs generated by the restarting router after it initializes LSP fragment sequence numbers. This may result in temporary blackholes until subsequent LSPs with higher sequence numbers are regenerated.

l These blackholes can be avoided if the neighbors suppress advertising the previous adjacencies to the restarting router until the latter has flooded LSPs with higher sequence numbers.

Examples

# Set the SA bit during Graceful Restart.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] graceful-restart suppress-sa

4.1.25 import-route

Syntax

import-route { isis [ process-id ] | ospf [ process-id ] | rip [ process-id ] | bgp [ allow-ibgp ] | direct | static } [ cost cost | cost-type { external | internal } | [ level-1 | level-1-2 | level-2 ] | route-policy route-policy-name | tag tag ] *

undo import-route { isis [ process-id ] | ospf [ process-id ] | rip [ process-id ] | bgp | direct | static }

View

IS-IS view

Parameters

isis [ process-id ]: Redistributes routes from a specified ISIS process. process-id is in the range of 1 to 65535.

ospf [ process-id ]: Redistributes routes from a specified OSPF process. process-id is in the range of 1 to 65535.

rip [ process-id ]: Redistributes routes from a specified RIP process. process-id is in the range of 1 to 65535.

bgp: Redistributes BGP routes.

allow-ibgp: Redistributes IBGP routes.

direct: Redistributes direct routes.

static: Redistributes static routes.

cost: Specifies a cost for redistributed routes.

The range of the cost depends on it type:

l For the types of narrow, narrow-compatible and compatible, the cost ranges from 0 to 63.

l For the types of wide, wide-compatible, the cost ranges from 0 to 16777215.

cost-type { external | internal }: Specifies a cost type. The internal type indicates the cost of routes within an area; the external type indicates the cost of routes between areas. The type is external by default. The keywords are valid only when the cost type is narrow, narrow-compatible or compatible.

level-1: Redistributes routes into the Level-1 routing table.

level-2: Redistributes routes into the Level-2 routing table. If no level is specified, the routes are redistributed into the Level-2 routing table by default.

level-1-2: Redistributes routes into both Level-1 and Level-2 routing tables.

route-policy route-policy-name: Redistributes only routes satisfying the matching conditions of a routing policy, the name of which is a string of 1 to 19 characters.

tag tag: Specifies a tag value for redistributed routes from 1 to 4294967295.

Description

Use the import-route command to redistribute routes from other protocols.

Use the undo import-route command to disable route redistribution.

Route redistribution is not available by default.

IS-IS takes all the redistributed routes as external routes to destinations outside the IS-IS routing domain.

Related commands: import-route isis level-2 into level-1.

& Note:

Using the import-route bgp command redistributes only EBGP routes. Using the import-route bgp allow-ibgp command redistributes also IBGP routes, but this may cause routing loops. Be cautious with this command.

Examples

# Redistribute static routes and set the cost to 15.

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1] import-route static cost 15

4.1.26 import-route isis level-2 into level-1

Syntax

import-route isis level-2 into level-1 [ filter-policy { acl-number | ip-prefix ip-prefix-name | route-policy route-policy-name } | tag tag ] *

undo import-route isis level-2 into level-1

View

IS-IS view

Parameters

acl-number: Specifies the number of an ACL that is used to filter redistributed routes, ranging from 2000 to 3999.

ip-prefix ip-prefix-name: Specifies the name of an IP prefix list that is used to filter redistributed routes, a string of 1 to 19 characters.

route-policy route-policy-name: Specifies the name of a routing policy that is used to filter redistributed routes, a string of 1 to 19 characters.

tag tag: Specifies a tag value from 1 to 4294967295 for redistributed routes.

Description

Use the import-route isis level-2 into level-1 command to redistribute routes from Level-2 to Level-1area.

Use the undo import-route isis level-2 into level-1 command to disable this redistribution.

The redistribution is not available by default.

Note that:

l You can specify a routing policy in the import-route isis level-2 into level-1 command to filter routes from Level-2 to Level-1. Other routing policies specified for route reception and redistribution does not affect the route leaking.

l If a filter policy is configured, only routes passing it can be advertised into the Level-1 area.

Related commands: import-route.

Examples

# Configure the router to redistribute routes from Level-2 to Level-1.

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1] import-route isis level-2 into level-1

4.1.27 isis

Syntax

isis [ process-id ]

undo isis [ process-id ]

View

System view

Parameters

process-id: Process ID, ranging from 1 to 65535. The default is 1.

Description

Use the isis command to enable an IS-IS process and enter IS-IS view.

Use the undo isis command to disable an IS-IS process.

To run IS-IS, you must first use the isis command to enable an IS-IS process, then use the network-entity command to configure a Network Entity Title (NET) for the router, and then use the isis enable command to enable IS-IS on each interface that needs to run the IS-IS process.

Related commands: isis enable, network-entity.

Examples

# Enable IS-IS routing process 1, with the system ID being 0000.0000.0002, and area ID being 01.0001.

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1] network-entity 01.0001.0000.0000.0002.00

4.1.28 isis authentication-mode

Syntax

isis authentication-mode { simple | md5 } password [ level-1 | level-2 ] [ ip | osi ]

undo isis authentication-mode [ level-1 | level-2 ]

View

Interface view

Parameters

simple: Specifies to send the password in plain text.

md5: Specifies to send the password in ciphertext.

password: Specifies a password. For simple authentication mode, the password must be plain text. For md5 authentication mode, the password can be either plain text or ciphertext. A plain text password can be a string of up to 16 characters, such as user918. A cipher password must be a string of 24 characters, such as _(TT8F]Y\5SQ=^Q`MAF4<1!!.

level-1: Specifies to set the password for Level-1.

level-2: Specifies to set the password for Level-2.

ip: Specifies the system to check IP related fields in a LSP.

osi: Specifies the system to check OSI related fields in a LSP.

Whether a password should use ip or osi is not affected by the actual network environment.

& Note:

This command is not available in loopback interface view.

Description

Use the isis authentication-mode command to set the IS-IS authentication mode and password for an interface.

Use the undo isis authentication-mode command to disable the authentication and remove the password.

There is no password or authentication by default.

If you set a password without specifying any other parameter, the password applies to both Level-1 and Level-2, and the system checks the OSI related fields in a LSP.

Related commands: area-authentication-mode, domain authentication-mode.

& Note:

The level-1 and level-2 keywords are available only on the VLAN interface of switches after IS-IS is enabled on the interface using the isis enable command.

Examples

# Set the plain text password tangshi for VLAN-interface 10.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] isis authentication-mode simple tangshi level-1

4.1.29 isis circuit-level

Syntax

isis circuit-level [ level-1 | level-1-2 | level-2 ]

undo isis circuit-level

View

Interface view

Parameters

level-1: Specifies to set up only level-1 adjacency on the interface.

level-1-2: Specifies to set up level-1-2 adjacency on the interface.

level-2: Specifies to set up only level-2 adjacency on the interface.

Description

Use the isis circuit-level command to configure link adjacency level for an interface of a level-1-2 router.

Use the undo isis circuit-level command to restore the default.

An interface can establish level-1-2 adjacency by default.

This command is only available on a level-1-2 router. You can use it to configure an interface to establish the adjacency of a specified level (level-1 or level-2) with the neighbor, making the interface handle only the specified level hello packets. An interface can receive and send only one level hello packet on a point-to-point link. Using this command can reduce the router’s processing time and save bandwidth.

Related commands: is-level.

Examples

# Suppose VLAN-interface 10 is connected to a non backbone router in the same area. Configure the link adjacency level of VLAN-interface 10 as Level-1 to prevent sending and receiving Level-2 Hello packets.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] isis enable

[Sysname-Vlan-interface10] isis circuit-level level-1

4.1.30 isis circuit-type

Syntax

isis circuit-type p2p

undo isis circuit-type

View

Interface view

Parameters

p2p: Specifies the interface’s network type as P2P.

Description

Use the isis circuit-type command to configure the network type for an interface.

Use the undo isis circuit-type command to restore the default.

By default, the network type of a switch’s VLAN interface is broadcast.

& Note:

This command is not available in the loopback interface view.

Examples

# Configure the network type of VLAN-interface 10 as P2P.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] isis enable

[Sysname-Vlan-interface10] isis circuit-type p2p

4.1.31 isis cost

Syntax

isis cost value [ level-1 | level-2 ]

undo isis cost [ level-1 | level-2 ]

View

Interface view

Parameters

value: Specifies a cost for SPF calculation on a specified level. The default is 10. The range of cost value differs according to different cost types.

l For types narrow, narrow-compatible and compatible: The cost value ranges from 1 to 63.

l For types wide and wide-compatible: The cost value ranges from 1 to 16777215.

level-1: Applies the cost to Level-1.

level-2: Applies the cost to Level-2.

Description

Use the isis cost command to set the link cost of an interface for SPF calculation.

Use the undo isis cost command to restore the default.

No cost is configured by default.

If neither level-1 nor level-2 is included, the cost applies to both level-1 and level-2.

You are recommended to configure a proper link cost for each interface for optimal route selection.

Relate command: circuit-cost.

Examples

# Configure the Level-2 link cost as 5 for VLAN-interface10.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] isis cost 5 level-2

4.1.32 isis dis-name

Syntax

isis dis-name symbolic-name

undo isis dis-name

View

Interface view

Parameters

symbolic-name: Specifies a name for the local LAN, a string of 1 to 64 characters.

Description

Use the isis dis-name command to configure a name for local LAN. If the local router is the DIS, the name will be advertised in a pseudonode LSP packet.

Use the undo isis dis-name command to disable this function.

No name is configured by default.

Note that this command takes effect only on a router with the dynamic hostname process enabled. This command is not supported on a Point-to-Point interface.

& Note:

This command is not available in the loopback interface view.

Examples

# Configure the name as LOCALAREA for the local LAN.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] isis dis-name LOCALAREA

4.1.33 isis dis-priority

Syntax

isis dis-priority value [ level-1 | level-2 ]

undo isis dis-priority [ level-1 | level-2 ]

View

Interface view

Parameters

value: Specifies a priority for DIS selection, ranging from 0 to 127.

level-1: Applies the DIS selection priority to Level-1.

level-2: Applies the DIS selection priority to level-2.

If neither level-1 nor level-2 is specified in this command, the DIS priority applies to both Level-1 and Level-2.

Description

Use the isis dis-priority command to specify a DIS selection priority on a specified level for an interface.

Use the undo isis dis-priority command to restore the default priority of 64.

There is no backup DIS in IS-IS and the router with the 0 priority can also participate in DIS selection.

& Note:

This command is not available in the loopback interface view.

Examples

# Configure the level-2 DIS priority as 127 for VLAN-interface 10.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] isis dis-priority 127 level-2

4.1.34 isis enable

Syntax

isis enable [ process-id ]

undo isis enable

View

Interface view

Parameters

process-id: Specifies a IS-IS process ID, ranging from 1 to 65535. The default is 1.

Description

Use the isis enable command to enable an IS-IS routing process on the interface.

Use the undo isis enable command to disable this configuration.

No IS-IS routing process is enabled on an interface by default.

To run IS-IS, you need to use the isis command to enable an IS-IS process, and use the network-entity command to configure a network entity title (NET) for the router, and then use the isis enable command to enable IS-IS on each interface that needs to run the IS-IS process.

Related commands: isis, network-entity.

Examples

# Create IS-IS routing process 1, and enable the IS-IS routing process on VLAN-interface 10.

<Sysname> system-view

[Sysname] isis 1

[Sysname-isis-1] network-entity 10.0001.1010.1020.1030.00

[Sysname-isis-1] quit

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] isis enable 1

4.1.35 isis mesh-group

Syntax

isis mesh-group { mesh-group-number | mesh-blocked }

undo isis mesh-group

View

Interface view

Parameters

mesh-group-number: Specifies a mesh group number, ranging from 1 to 4294967295.

mesh-blocked: Blocks the interface from flooding LSPs to make it send LSPs only after receiving requests.

Description

Use the isis mesh-group command to add the interface into a specified mesh group.

Use the undo isis mesh-group command to delete the interface from a mesh group.

An interface is not in any mesh group by default.

For an interface not in a mesh group, it follows the normal process to flood the received LSPs to other interfaces. For the NBMA network with high connectivity and multiple point-to-point links, this will cause repeated LSP flooding and bandwidth waste.

After an interface is added to a mesh group, it will only flood a received LSP to interfaces not belonging to the same mesh group.

When you add an interface to a mesh group or block the interface, make sure to retain some redundancy so that a link failure will not affect the normal LSP packet flooding.

& Note:

l A mesh-group is only available for a point-to-point link interface.

l This command is not available in loopback interface view.

Examples

# Add IS-IS enabled VLAN-interface 10 to the mesh-group 3.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] isis mesh-group 3

4.1.36 isis silent

Syntax

isis silent

undo isis silent

View

Interface view

Parameters

None

Description

Use the isis silent command to disable the interface from sending and receiving IS-IS hello packets.

Use the undo isis silent command to restore the default.

By default, an interface is not disabled from sending and receiving hello packets.

& Note:

The feature is not supported on the loopback interface.

Examples

# Disable VLAN-interface 10 from sending and receiving hello packets.

<Sysname> system-view

[Sysname] interface vlan-interface10

[Sysname-Vlan-interface10] isis silent

4.1.37 isis small-hello

Syntax

isis small-hello

undo isis small-hello

View

Interface view

Parameters

None

Description

Use the isis small-hello command to configure the interface to send small Hello packets without padding field.

Use the undo isis small-hello command to disable the feature.

An interface sends standard Hello packets by default.

& Note:

This command is not available in loopback interface view.

Examples

# Configure VLAN-interface 10 to send small Hello packets.

<Sysname> system-view

[Sysname] interface vlan-interface10

[Sysname-Vlan-interface10] isis small-hello

4.1.38 isis timer csnp

Syntax

isis timer csnp seconds [ level-1 | level-2 ]

undo isis timer csnp [ level-1 | level-2 ]

View

Interface view

Parameters

seconds: Specifies the interval in seconds for sending CSNP packets over broadcast network, ranging from 1 to 600.

level-1: Applies the interval to Level-1.

level-2: Applies the interval to Level-2.

Description

Use the isis timer csnp command to specify the interval for sending CSNP packets over broadcast network.

Use the undo isis timer csnp command to restore the default.

The default CSNP interval is 10 seconds.

& Note:

l If no level is specified, the CSNP interval applies to both Level-1 and Level-2 of the current ISIS process. If a level is specified, the interval applies to the level.

l This command is not supported on the loopback interface.

l This command only applies to the DIS router, which sends CSNP packets periodically.

Examples

# Configure Level-2 CSNP packets to be sent every 15 seconds over VLAN-interface 10.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] isis timer csnp 15 level-2

4.1.39 isis timer hello

Syntax

isis timer hello seconds [ level-1 | level-2 ]

undo isis timer hello [ level-1 | level-2 ]

View

Interface view

Parameters

seconds: Specifies the interval in seconds for sending Hello packets, ranging from 3 to 255.

level-1: Specifies the interval for sending Level-1 Hello packets.

level-2: Specifies the time interval for sending Level-2 Hello packets.

Description

Use the isis timer hello command to specify the interval for sending hello packets.

Use the undo isis timer hello command to restore the default.

The default hello interval is 10 seconds.

& Note:

l If no level is specified, the hello interval applies to both Level-1 and Level-2 of the current ISIS process. If a level is specified, the interval applies to the level.

l This command is not supported on the loopback interface.

l The broadcast link distinguishes between Level-1 and Level-2 packets, so you need specify intervals for the two levels respectively. The point-to-point link however does not distinguish, so you need not specify intervals respectively.

l As the shorter the interval is, the more system resources will be occupied, you should configure a proper interval as needed.

Related commands: isis timer holding-multiplier.

Examples

# Configure Level-2 Hello packets to be sent every 20 seconds over VLAN-interface 10.

<Sysname> system-view

[Sysname] interface Vlan-interface 10

[Sysname-Vlan-interface10] isis timer hello 20 level-2

4.1.40 isis timer holding-multiplier

Syntax

isis timer holding-multiplier value [ level-1 | level-2 ]

undo isis timer holding-multiplier [ level-1 | level-2 ]

View

Interface view

Parameters

value: Number of hello intervals, in the range of 3 to 1000.

level-1: Applies the number to the Level-1 IS-IS neighbor.

level-2: Applies the number to the Level-2 IS-IS neighbor.

& Note:

l If neither level-1 nor level-2 is specified in the command, the number applies to the current level IS-IS process.

l This command is not available in loopback interface view.

Description

Use the isis timer holding-multiplier command to configure the number of hello intervals, within which if the interface receive no hello packets, its neighbor is considered dead.

Use the undo isis timer holding-multiplier command to restore the default.

On an interface, the default number of hello intervals is three.

You can specify the number of hello intervals for Level-1 and Level-2 neighbors respectively on a broadcast network. For a point-to-point link, there is only one kind of Hello packet, so you need not specify Level-1 or Level-2.

The specified number of hello intervals is used to configure the Holddown time. If a router receives no Hello packets from a neighbor within Holddown time, it will take the neighbor as dead. The Holddown time can be configured differently for different routers within an area. You can adjust the Holddown time by changing either the hello interval or the number of Hello intervals on an interface.

Related commands: isis timer hello.

Examples

# Configure the number of Level-2 Hello intervals as 5 for interface VLAN-interface, that is, if no Hello packet is received from the interface within 5 hello intervals, the IS-IS neighbor is considered dead.

<Sysname> system-view

[Sysname] interface Vlan-interface 10

[Sysname-Vlan-interface10] isis timer holding-multiplier 5

4.1.41 isis timer lsp

Syntax

isis timer lsp time [ count count ]

undo isis timer lsp

View

Interface view

Parameters

time: Specifies the minimum interval in milliseconds for sending link-state packets, ranging from 1 to 1000.

count: Specifies the maximum number of link-state packets to be sent at one time, in the range of 1 to 1000. The default is 100 for the broadcast interface and 11 for point-to-point interface.

Description

Use the isis timer lsp command to configure the interval for sending link-state packets on the interface.

Use the undo isis timer lsp command to restore the default of 33 ms.

Related commands: isis timer retransmit.

& Note:

This command is not available in loopback interface view.

Examples

# Configure the interval as 500 milliseconds for sending LSPs on interface VLAN-interface 10.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] isis timer lsp 500

4.1.42 isis timer retransmit

Syntax

isis timer retransmit seconds

undo isis timer retransmit

View

Interface view

Parameters

seconds: Specifies the interval in seconds for retransmitting LSP packets, ranging from 1 to 300.

Description

Use the isis timer retransmit command to configure the interval for retransmitting LSP packets over point-to-point link.

Use the undo isis timer retransmit command to restore the default of 5s.

You need not use this command over a broadcast link where no LSP response is required.

Related commands: isis timer lsp.

& Note:

l This command is not available in loopback interface view.

l Configure a proper time to avoid unnecessary retransmissions.

Examples

# Configure the LSP retransmission interval as 10 seconds for VLAN-interface 10.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] isis timer retransmit 10

4.1.43 is-level

Syntax

is-level { level-1 | level-1-2 | level-2 }

undo is-level

View

IS-IS view

Parameters

level-1: Configures the router to work on Level-1, which means it only calculates routes within the area, and maintains the L1 LSDB.

level-1-2: Configures the router to work on Level-1-2, which means it calculates routes and maintains the LSDBs for both L1 and L2.

level-2: Configures the router to work on Level-2, which means it calculates routes and maintains the LSDB for L2 only.

Description

Use the is-level command to configure IS-IS router type.

Use the undo is-level command to restore the default.

The default router type is level-1-2.

It is recommended to configure system level when you configure IS-IS.

You can configure all the routers as either Level-1 or Level-2 if there is only one area, because there is no need for all routers to maintain two identical databases at the same time. In this case, you are recommended to configure all the routers as Level-2 in the IP network for scalability consideration.

Related commands: isis circuit-level.

Examples

# Configure the router to work in Level-1.

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1] is-level level-1

4.1.44 is-name

Syntax

is-name sys-name

undo is-name

View

IS-IS view

Parameters

symbolic-name: Specifies a name for the local IS, a string of 1 to 64 characters.

Description

Use the is-name command to enable the dynamic hostname process and configure a name for the router.

Use the undo is-name command to remove the configuration.

No IS name is configured by default.

Examples

# Configure a name for the local IS.

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1] is-name RUTA

4.1.45 is-name map

Syntax

is-name map sys-id map-sys-name

undo is-name map sys-id

View

IS-IS view

Parameters

sys-id: System ID or a pseudonode ID of a remote IS.

map-sys-name: Specifies a name for the remote IS, a string of 1 to 64 characters.

Description

Use the is-name map command to map a name to a remote IS. Each remote IS system ID corresponds to only one name.

Use the undo is-name map command to remove the configuration.

By default, no name is configured for a remote IS.

Examples

# Map the name RUTB to the remote IS 0000.0000.0041.

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1] is-name map 0000.0000.0041 RUTB

4.1.46 is-snmp-traps enable

Syntax

is-snmp-traps enable

undo is-snmp-traps

View

IS-IS view

Parameters

None

Description

Use the is-snmp-traps enable command to enable the SNMP Trap function of IS-IS.

Use the undo is-snmp-traps command to disable this function.

SNMP Trap is enabled by default.

Examples

# Enable SNMP Trap.

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1] is-snmp-traps enable

4.1.47 log-peer-change

Syntax

log-peer-change

undo log-peer-change

View

IS-IS view

Parameters

None

Description

Use the log-peer-change command to enable logging on IS-IS adjacency state changes.

Use the undo log-peer-change command to disable the logging.

The feature is enabled by default.

After the feature is enabled, information about IS-IS adjacency state changes is sent to the configuration terminal.

Examples

# Enable logging on the IS-IS adjacency state changes.

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1] log-peer-change

4.1.48 lsp-fragments-extend

Syntax

lsp-fragments-extend [ [ level-1 | level-2 | level-1-2 ] | [ mode-1 | mode-2 ] ] *

undo lsp-fragments-extend

View

IS-IS view

Parameters

mode-1: Fragment extension mode 1, used on a network where some routers do not support LSP fragment extension.

mode-2: Fragment extension mode 2, used on a network where all routers support LSP fragment extension.

level-1: Applies the fragment extension mode to Level-1 LSPs.

level-2: Applies the fragment extension mode to Level-2 LSPs.

level-1-2: Applies the fragment extension mode to both Level-1 and Level-2 LSPs.

& Note:

The mode-1 and level-1-2 keywords are used by default.

Description

Use the lsp-fragments–extend command to enable LSP fragment extension in a specified mode and level.

Use the undo lsp-fragments–extend command to disable this feature.

The feature is disabled by default.

Note the following:

l After LSP fragment extension is enabled in an IS-IS process, the MTUs of all the interfaces on which this IS-IS process is enabled must not be less than 512; otherwise, LSP fragment extension will not take effect.

l At least one virtual system needs to be configured for the router to generate extended LSP fragments. An IS-IS process allows 50 virtual systems at most.

Examples

# Enable LSP fragment extension of mode-1 and Level-2.

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1] lsp-fragments-extend mode-1 level-2

4.1.49 lsp-length originate

Syntax

lsp-length originate size [ level-1 | level-2 ]

undo lsp-length originate [ level-1 | level-2 ]

View

IS-IS view

Parameters

size: Specifies the maximum size in bytes of a LSP packet, ranging from 512 to 16384.

level-1: Applies the size to Level-1 LSP packets.

level-2: Applies the size to Level-2 LSP packets.

& Note:

If neither Level-1 nor Level-2 is specified in the command, the configured maximum size applies to the current IS-IS level.

Description

Use the lsp-length originate command to configure the maximum size of generated Level-1 or Level-2 LSPs.

Use the undo lsp-length originate command to restore the default.

The maximum size of 1497 bytes is the default.

Examples

# Configure the maximum size of the generated Level-2 LSPs as 1024 bytes.

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1] lsp-length originate 1024 level-2

4.1.50 lsp-length receive

Syntax

lsp-length receive size

undo lsp-length receive

View

IS-IS view

Parameters

size: Maximum size of received LSPs, in the range of 512 to 16384 bytes.

Description

Use the lsp-length receive command to configure the maximum size of received LSPs.

Use the undo lsp-length receive command to restore the default.

By default, the maximum size of received LSPs is 1497 bytes.

Examples

# Configure the maximum size of received LSPs.

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1] lsp-length receive 1024

4.1.51 maximum load-balancing

Syntax

maximum load-balancing number

undo maximum load-balancing

View

IS-IS view

Parameters

number: Maximum number of equal-cost load balanced routes, in the range 1 to 4.

Description

Use the maximum load-balancing command to configure the maximum number of equal-cost load balanced routes.

Use the undo maximum load-balancing command to restore the default.

By default, the maximum number of equal-cost load balanced routes is 4.

Examples

# Configure the maximum number of equal-cost load-balanced routes as 2.

<Sysname> system-view

[Sysname] isis 100

[Sysname-isis-100] maximum load-balancing 2

# Restore the default.

[Sysname-isis-100] undo maximum load-balancing

4.1.52 network-entity

Syntax

network-entity net

undo network-entity net

View

IS-IS view

Parameters

net: Network Entity Title (NET) in the format of X…X.XXXX....XXXX.00, with the first part X…X being the area address, the middle part XXXX....XXXX (a total of 12 “X”) being the router’s system ID and the last part 00 being SEL.

Description

Use the network-entity command to configure the Network Entity Title for an IS-IS routing process.

Use the undo network-entity command to delete a NET.

No NET is configured by default.

A NET is a network service access point (NSAP), and it is in the range of 8 to 20 bytes for IS-IS.

A NET has three parts: The first part is area ID, which ranges from 1 to 13 bytes. Routers in the same area must have the same area ID. The second part is the router’s 6-byte system ID, which is unique within the whole area and backbone area. The third part is the 1-byte SEL that must be 00. Generally, a router needs one NET. In the case of repartitioning an area, such as merging or splitting, you can configure multiple NETs beforehand for the router to ensure correct and continuous routing.

Related commands: isis, isis enable.

Examples

# Specify the NET as 10.0001.1010.1020.1030.00, of which 10.0001 is the area ID and 1010.1020.1030 is the system ID.

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1] network-entity 10.0001.1010.1020.1030.00

4.1.53 preference

Syntax

preference { route-policy route-policy-name | preference } *

undo preference

View

IS-IS view

Parameters

preference: Specifies the preference for IS-IS protocol, ranging from 1 to 255.

route-policy-name: Routing policy name, a string of 1 to 19 characters. The preference applies to routes passing the routing policy.

Description

Use the preference command to configure the preference for IS-IS protocol.

Use the undo preference command to restore the default.

By default, the IS-IS protocol preference is 15.

If a routing policy is specified in this command, the preference (if any) set by the routing policy applies to those matched routes. Other routes use the preference set by the preference command.

When a router runs multiple routing protocols at the same time, the system will set a preference to each routing protocol. If several protocols find routes to the same destination, the route of the routing protocol with the highest preference is selected.

Examples

# Configure the preference of IS-IS protocol as 25.

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1] preference 25

4.1.54 reset isis all

Syntax

reset isis all [ process-id ]

View

User view

Parameters

process-id: Clears the data structure information of an IS-IS process numbered from 1 to 65535.

Description

Use the reset isis all command to clear all ISIS data structure information.

No data structure information is cleared by default.

This command is used when the LSP needs to be updated immediately. For example, after performing the area-authentication-mode and domain-authentication-mode commands, you can use this command to clear old LSPs.

Related commands: area-authentication-mode, domain authentication-mode.

Examples

# Clear all IS-IS data structure information.

<Sysname> reset isis all

4.1.55 reset isis peer

Syntax

reset isis peer system-id [ process-id ]

View

User view

Parameters

system-id: Specifies the system ID of an IS-IS neighbor.

process-id: Specifies the ID of an IS-IS process, in the range of 1 to 65535.

Description

Use the reset isis peer command to clear the data structure information of a specified IS-IS neighbor.

The command is disabled by default.

This command is used when you need to re-establish an IS-IS neighbor.

Examples

# Clear the data structure information of the neighbor with system ID being 0000.0c11.1111.

<Sysname> reset isis peer 0000.0c11.1111

4.1.56 set-overload

Syntax

set-overload [ on-startup [ [ start-from-nbr system-id [ timeout1 [ nbr-timeout ] ] ] | timeout2 ] [ allow { interlevel | external } * ]

undo set-overload

View

IS-IS view

Parameters

on-startup: Sets the overload bit upon system startup.

start-from-nbr system-id: Starts the nbr-timeout timer when the router begins to establish the neighbor relationship with the neighbor. If the neighbor relationship is formed within the nbr-timeout interval, IS-IS keeps the overload bit set; if not, the bit is cleared. system-id specifies the neighbor.

timeout1: IS-IS keeps the overload bit set within the timeout1 interval after the neighbor relationship is formed within the nbr-timeout interval. The timeout1 interval is in the range 5 to 86400 seconds and defaults to 600 seconds.

nbr-timeout: The timer is started when the router begins to establish the neighbor relationship with the neighbor after system startup. The timer has an interval from 5 to 86400 seconds. The default is 1200 seconds.

timeout2: Sets the overload bit within the timeout2 interval after system startup. The interval is in the range 5 to 86400 seconds and defaults to 600 seconds.

allow: Allows advertising address prefixes. By default, no address prefixes are allowed to be advertised when the overload bit is set.

interlevel: Allows advertising IP address prefixes learnt from different IS-IS levels with the allow keyword specified.

external: Allows advertising IP address prefixes redistributed from other routing protocols with the allow keyword specified.

Description

Use the set-overload command to set the overload tag for the current router.

Use the undo set-overload command to clear the overload tag.

No overload flag is set by default.

Note that:

l If the on-startup keyword is not specified, the command sets the overload bit immediately until the undo set-overload command is executed.

l If the on-startup keyword is specified, IS-IS sets the overload bit upon system startup and keeps it set within the timeout2 interval.

l If both on-startup and start-from-nbr system-id are specified, IS-IS sets the overload bit from system startup to when the neighbor relationship with the specified neighbor is formed within the nbr-timeout interval, and from then on, IS-IS keeps the overload bit set within the timeout1 interval. If the neighbor relationship with the specified neighbor is not formed within the nbr-timeout interval, the overload bit is cleared.

Examples

# Set overload flag on the current router.

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1] set-overload

4.1.57 spf-slice-size

Syntax

spf-slice-size duration-time

undo spf-slice-size

View

IS-IS view

Parameters

duration-time: Specifies the duration in milliseconds of each sliced SPF calculation, ranging from 10 to 50000. Each sliced SPF calculation is ended when the duration time is reached. If the duration-time is set to 0, the entire SPF calculation will not be sliced.

Description

Use the spf-slice-size command to specify the duration for each sliced SPF calculation.

Use the undo spf-slice-size command to restore the default.

By default, the duration of each sliced SPF calculation is 10 milliseconds.

To prevent the SPF calculation from occupying the system resources for a long time, you can use this command to slice the whole SPF calculation into pieces.

You are not recommended to change the default setting.

Examples

# Set the duration of each sliced SPF calculation to 1 second.

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1] spf-slice-size 1000

4.1.58 summary

Syntax

summary ip-address { mask | mask-length } [ avoid-feedback | generate_null0_route | tag tag | [ level-1 | level-1-2 | level-2 ] ] *

undo summary ip-address { mask | mask-length } [ level-1 | level-1-2 | level-2 ]

View

IS-IS view

Parameters

ip-address: Destination IP address of a summary route.

mask: Mask of the destination IP address, in dotted decimal format.

mask-length: Mask length, in the range of 0 to 32.

avoid-feedback: Specifies to avoid learning aggregate routes by routing calculation.

generate_null0_route: Specifies to generate the Null 0 route to avoid routing loops.

tag tag: Specifies a management tag, in the range of 1 to 4294967295.

level-1: Specifies to summarize only the routes redistributed to Level-1 area.

level-1-2: Specifies to summarize all the routes redistributed to the Level-1 and Level-2 areas.

level-2: Specifies to summarize only the routes redistributed to the Level-2 area.

Description

Use the summary command to configure a summary route.

Use the undo summary command to remove a summary route.

No summarization is configured by default.

If no level is specified, only the level-2 routes will be summarized by default.

You can summarize multiple contiguous networks with a summary network to reduce the size of the routing table, as well as that of LSP and LSDB generated by the router. It is allowed to summarize native IS-IS routes and redistributed routes. After summarization, the cost of the summary route is the smallest cost of those summarized routes.

Note that the router summarizes only routes in local LSPs.

Examples

# Configure a summary route of 202.0.0.0/8.

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1] summary 202.0.0.0 255.0.0.0

4.1.59 timer isp-generation

Syntax

timer lsp-generation maximum-interval [ initial-interval [ incremental-interval ] ] [ level-1 | level-2 ]

undo timer lsp-generation [ level-1 | level-2 ]

View

IS-IS view

Parameters

maximum-interval: Maximum interval in seconds for generating ISIS LSPs, in the range 1 to 120.

initial-interval: Initial interval in milliseconds for generating ISIS LSPs, in the range 10 to 60000. The default is 0.

incremental-interval: Incremental interval (in milliseconds), in the range 10 to 60000. The default is 0.

level-1: Applies the specified intervals to generating level-1 LSPs.

level-2: Applies the specified intervals to generating level-1 LSPs.

Description

Use the timer lsp-generation command to specify intervals for ISIS LSP generation.

Use the undo timer isp-generation command to restore the default.

By default, the LSP generation interval is 2 seconds.

& Note:

l If only the maximum interval is specified, this maximum interval is the LSP generation interval.

l If both the maximum and initial intervals are specified, the system can adjust the LSP generation interval upon topology changes. When the topology is stable, the initial interval applies as the LSP generation interval. When topology changes become frequent, the LSP generation interval is the maximum or initial interval.

l If all the maximum, initial and incremental intervals are specified, the system will adjust the LSP generation interval upon topology changes in this way: when the network changes are infrequent, the initial interval applies as the LSP generation interval. When the network changes become frequent, the generation interval changes between the initial and maximum intervals based on the specified incremental interval.

By using this command to adjust the LSP generation interval, you can save the bandwidth and router resources that may be wasted due to frequent network changes.

Examples

# Set the maximum LSP generation interval to 10 seconds, initial interval to 100 milliseconds and the incremental interval to 200 milliseconds.

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1]timer lsp-generation 10 100 200

# Set the maximum LSP generation interval to 15 seconds.

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1]timer lsp-generation 15

4.1.60 timer lsp-max-age

Syntax

timer lsp-max-age seconds

undo timer lsp-max-age

View

IS-IS view

Parameters

seconds: Specifies the LSP maximum aging time in seconds, ranging from 1 to 65535.

Description

Use the timer lsp-max-age command to set the LSP maximum aging time for the current router.

Use the undo timer lsp-max-age command to restore the default.

The default is 1200 seconds.

A router puts the specified LSP maximum aging time into an LSP before advertisement. When the LSP is received by other routers, the aging time will decrease as the time goes by. If no update is received for the LSP after its aging time decreases to 0, the LSP will be deleted from the LSDB.

Related commands: timer lsp-refresh.

Examples

# Set the maximum LSP aging time to 1500 seconds.

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1] timer lsp-max-age 1500

4.1.61 timer lsp-refresh

Syntax

timer lsp-refresh seconds

undo timer lsp-refresh

View

IS-IS view

Parameters

seconds: Specifies the LSP refresh interval in seconds, ranging from 1 to 65534.

Description

Use the timer lsp-refresh command to set the LSP refresh interval.

Use the undo timer lsp-refresh to restore the default.

The default is 900 seconds.

Using this feature, you can keep LSPs in synchronization for the whole area.

Related commands: timer lsp-max-age.

& Note:

To refresh LSPs before they are aged out, the interval set by the timer lsp-refresh command must be smaller than that set by the timer lsp-max-age command.

Examples

# Set the LSP refresh interval to 1500 seconds.

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1] timer lsp-refresh 1500

4.1.62 timer spf

Syntax

timer spf maximum-interval [ minimum-interval [ incremental-interval ] ]

undo timer spf

View

IS-IS view

Parameters

maximum-interval: Specifies the maximum interval (in seconds) for SPF calculations, ranging from 1 to 120.

minimum-interval: Specifies the minimum interval (in milliseconds) for SPF calculations, ranging from 10 to 60000.

incremental-interval: Specifies the incremental interval (in milliseconds) for SPF calculations, ranging from 10 to 60000.

Description

Use the timer spf command to set the time intervals for ISIS routing calculation.

Use the undo timer spf command to restore the default.

The default IS-IS SPF calculation interval is 10 seconds.

When the network changes are infrequent, the SPF calculation interval decreases to the minimum interval. When the network changes become frequent, the calculation interval is increased by inc-interval*(2^n-2), (n is the number of network changes that triggered SPF calculations) until the maximum interval is reached.

With this feature, you can prevent the router from over consumption due to frequent network changes.

Examples

# Set the maximum SPF calculation interval to 10 seconds, minimum interval to 100 milliseconds and the incremental interval to 200 milliseconds.

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1]timer spf 10 100 200

# Set the maximum SPF calculation interval to 15 seconds.

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1]timer spf 15

4.1.63 virtual-system

Syntax

virtual-system virtual-system-id

undo virtual-system virtual-system-id

View

IS-IS view

Parameters

virtual-system-id: Virtual system ID of the IS-IS process.

Description

Use the virtual-system command to configure a virtual system ID for the IS-IS process. No extended LSPs are generated without the virtual system ID.

Use the undo virtual-system command to remove the virtual system ID.

By default, no virtual system ID is configured for the IS-IS process.

Examples

# Set a virtual system ID of 2222.2222.2222 for IS-IS process 1.

<Sysname> system-view

[Sysname] isis

[Sysname-isis-1] virtual-system 2222.2222.2222

Chapter 5 BGP Configuration Commands

& Note:

The term “router” in this document refers to a generic router or an Ethernet switch running routing protocols.

5.1 BGP Configuration Commands

& Note:

For routing policy configuration commands, refer to Routing Policy Commands .

5.1.1 aggregate

Syntax

aggregate ip-address { mask | mask-length } [ as-set | attribute-policy route-policy-name | detail-suppressed | origin-policy route-policy-name | suppress-policy route-policy-name ] *

undo aggregate ip-address { mask | mask-length }

View

BGP view

Parameters

ip-address: Summary address.

mask: Summary mask, in dotted decimal notation.

mask-length: Summary mask length, in the range 0 to 32.

as-set: Creates a summary with AS set.

attribute-policy route-policy-name: Sets the attributes of the summary route according to the routing policy, the name of which is a string of 1 to 19 characters.

detail-suppressed: Only advertises the summary route.

suppress-policy route-policy-name: Suppresses specific routes defined in the routing policy, the name of which is a string of 1 to 19 characters.

origin-policy route-policy-name: References the routing policy to specify routes for summarization. The policy name is a string of 1 to 19 characters.

The keywords of the command are described as follows:

Table 5-1 Functions of the keywords

Keywords	Function
as-set	Used to create a summary route, whose AS path contains the AS path information of summarized routes. Use this keyword carefully when many AS paths need to be summarized, because the frequent changes of routes may lead to route oscillation.
detail-suppressed	This keyword does not suppress the summary route, but it suppresses the advertisement of all the more specific routes. To summarize only some specific routes, use the peer filter-policy command.
suppress-policy	Used to create a summary route and suppress the advertisement of some summarized routes. If you want to suppress some routes selectively and leave other routes still advertised, use the if-match clause of the route-policy command.
origin-policy	Selects only routes satisfying the routing policy for route summarization
attribute-policy	Sets attributes except the AS-PATH attribute for the summary route. The same work can be done by using the peer route-policy command.

Description

Use the aggregate command to create a summary route in the BGP routing table.

Use the undo aggregate command to remove a summary route.

By default, no summary route is configured.

Examples

# In BGP view, create a summary of 192.213.0.0/16 in the BGP routing table.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] aggregate 192.213.0.0 255.255.0.0

5.1.2 balance

Syntax

balance number

undo balance

View

BGP view

Parameters

number: Number of BGP routes for load balancing. Its range varies with devices. When it is set to 1, load balancing is disabled.

Description

Use the balance command to configure the number of BGP routes for load balancing.

Use the undo balance command to disable load balancing.

By default, no load balancing is configured.

Unlike IGP, BGP has no explicit metric for making load balancing decision. Instead, it implements load balancing using route selection rules.

Related commands: display bgp routing-table.

Examples

# In BGP view, set the number of routes participating in BGP load balancing to 2.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] balance 2

5.1.3 bestroute as-path-neglect

Syntax

bestroute as-path-neglect

undo bestroute as-path-neglect

View

BGP view

Parameters

None

Description

Use the bestroute as-path-neglect command to configure the BGP router to not evaluate the AS_PATH during best route selection.

Use the undo bestroute as-path-neglect command to configure the BGP router to take the AS_PATH as a factor during best route selection.

By default, the router takes AS_PATH as a factor when selecting the best route.

Examples

# In BGP view, ignore AS_PATH in route selection.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] bestroute as-path-neglect

5.1.4 bestroute compare-med

Syntax

bestroute compare-med

undo bestroute compare-med

View

BGP view

Parameters

None

Description

Use the bestroute compare-med command to enable the comparison of the MED for paths from each AS.

Use the undo bestroute compare-med command to disable this comparison.

This comparison is not enabled by default.

Caution:

After the bestroute compare-med command is executed, the balance command does not take effect.

Examples

# In BGP view, enable the comparison of MEDs for paths from each AS when selecting the best route.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] bestroute compare-med

5.1.5 bestroute med-confederation

Syntax

bestroute med-confederation

undo bestroute med-confederation

View

BGP view

Parameters

None

Description

Use the bestroute med-confederation command to enable the comparison of the MED for paths from confederation peers to select the optimal route.

Use the undo bestroute med-confederation command to disable the comparison.

The comparison is not enabled by default.

The system only compares MED values for paths from peers within the confederation. Paths from external ASs are advertised throughout the confederation without MED comparison.

Examples

# In BGP view, enable the comparison of the MED for paths from peers within the confederation.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] bestroute med-confederation

5.1.6 bgp

Syntax

bgp as-number

undo bgp [ as-number ]

View

System view

Parameters

as-number: Specifies the local AS number from 1 to 65535.

Description

Use the bgp command to enable BGP and enter the BGP view.

Use the undo bgp command to disable BGP.

By default, BGP is not enabled.

Examples

# Enable BGP and set local AS number to 100.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp]

5.1.7 compare-different-as-med

Syntax

compare-different-as-med

undo compare-different-as-med

View

BGP view

Parameters

None

Description

Use the compare-different-as-med command to enable the comparison of the MED for paths from peers in different ASs.

Use the undo compare-different-as-med command to disable the comparison.

The comparison is disabled by default.

If there are several paths for one destination available, the path with the smallest MED is selected.

Do not use this command unless associated ASs adopt the same IGP protocol and routing selection method.

Examples

# In BGP view, enable to compare the MED for paths from peers in different ASs.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] compare-different-as-med

5.1.8 confederation id

Syntax

confederation id as-number

undo confederation id

View

BGP view

Parameters

as-number: Number of the AS that contains multiple sub-ASs, in the range 1 to 65535.

Description

Use the confederation id command to configure a confederation ID.

Use the undo confederation id command to remove a specified confederation.

By default, no confederation ID is configured.

Configuring a confederation can reduce IBGP connections in a large AS. You can split the AS into several sub-ASs, and each sub-AS remains fully meshed. These sub-ASs form a confederation. Key IGP attributes of a route, such as the next hop, MED, local preference, are not discarded when crossing each sub-AS. The sub-ASs still look like a whole from the perspective of other ASs. This can ensure the integrity of the former AS, and solve the problem of too many IBGP connections in the AS.

Related commands: confederation nonstandard and confederation peer-as.

Examples

# Confederation 9 consists of four sub-ASs, namely, 38, 39, 40 and 41. The peer 10.1.1.1 is a member of the confederation while the peer 200.1.1.1 is outside of the confederation. Take sub AS 41 as an example.

<Sysname> system-view

[Sysname] bgp 41

[Sysname-bgp] confederation id 9

[Sysname-bgp] confederation peer-as 38 39 40

[Sysname-bgp] group Confed38 external

[Sysname-bgp] peer Confed38 as-number 38

[Sysname-bgp] peer 10.1.1.1 group Confed38

[Sysname-bgp] group Remote98 external

[Sysname-bgp] peer Remote98 as-number 98

[Sysname-bgp] peer 200.1.1.1 group Remote98

5.1.9 confederation nonstandard

Syntax

confederation nonstandard

undo confederation nonstandard

View

BGP view

Parameters

None

Description

Use the confederation nonstandard command to make the router compatible with routers not compliant with RFC3065 in the confederation.

Use the undo confederation nonstandard command to restore the default.

By default, all routers in the confederation comply with RFC3065.

All devices should be configured with this command to interact with those nonstandard devices in the confederation.

Related commands: confederation id and confederation peer-as.

Examples

# AS100 contains routers not compliant with RFC3065 and comprises two sub-ASs, 64000 and 65000.

<Sysname> system-view

[Sysname] bgp 64000

[Sysname-bgp] confederation id 100

[Sysname-bgp] confederation peer-as 65000

[Sysname-bgp] confederation nonstandard

5.1.10 confederation peer-as

Syntax

confederation peer-as as-number-list

undo confederation peer-as [ as-number-list ]

View

BGP view

Parameters

as-number-list: Sub-AS number list. Up to 32 sub-ASs can be configured in one command line. The expression is as-number-list = as-number &<1-32>, in which as-number specifies a sub-AS number, and &<1-32> indicates up to 32 numbers can be specified.

Description

Use the confederation peer-as command to specify confederation peer sub-ASs.

Use the undo confederation peer-as command to remove specified confederation peer sub-ASs.

By default, no confederation peer sub-ASs are configured.

Before this configuration, the confederation id command must be used to specify the confederation for the sub-ASs.

If the undo confederation peer-as command without the as-number-list argument is used, all confederation peer sub-ASs are removed.

Related commands: confederation nonstandard and confederation id.

Examples

# Specify confederation peer sub ASs 2000 and 2001.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] confederation id 10

[Sysname-bgp] confederation peer-as 2000 2001

5.1.11 dampening

Syntax

dampening [ half-life-reachable half-life-unreachable reuse suppress ceiling | route-policy route-policy-name ] *

undo dampening

View

BGP view

Parameters

half-life-reachable: Specifies a half-life for active routes from 1 to 45 minutes. By default, the value is 15 minutes.

half-life-unreachable: Specifies a half-life for suppressed routes from 1 to 45 minutes. By default, the value is 15 minutes.

reuse: Specifies a reuse threshold value for suppressed routes from 1 to 20000. A suppressed route whose penalty value decreases under the value is reused. By default, the reuse value is 750.

suppress: Specifies a suppression threshold from 1 to 20000. The route with a penalty value higher than the threshold is suppressed. The default value is 2000.

ceiling: Specifies a ceiling penalty value from 1001 to 20000. The value must be bigger than the suppress value. By default, the value is 16000.

route-policy-name: Routing policy name, a string of 1 to 19 characters.

half-life-reachable, half-life-unreachable, reuse, suppress and ceiling are mutually dependent. Once any one is configured, all the others should also be specified accordingly.

Description

Use the dampening command to enable BGP route dampening and/or configure dampening parameters.

Use the undo dampening command to disable route dampening.

By default, no route dampening is configured.

The command dampens only EBGP routes rather than IBGP routes.

Related commands: reset bgp dampening, reset bgp flap-info, display bgp routing-table dampened, display bgp routing-table dampening parameter and display bgp routing-table flap-info.

Examples

# In BGP view, configure BGP route dampening.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] dampening 15 15 1000 2000 10000

5.1.12 default ipv4-unicast

Syntax

default ipv4-unicast

undo default ipv4-unicast

View

BGP view

Parameters

None

Description

Use the default ipv4-unicast command to enable the use of IPv4 unicast address family for all peers.

Use the undo default ipv4-unicast command to disable the use of IPv4 unicast address family for all peers.

The use of IPv4 unicast address family is enabled by default.

Examples

# Enable IPv4 unicast address family for all neighbors.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] default ipv4-unicast

5.1.13 default local-preference

Syntax

default local-preference value

undo default local-preference

View

BGP view

Parameters

value: Default local preference, in the range 0 to 4294967295. The larger the value is, the higher the preference is.

Description

Use the default local-preference command to configure the default local preference.

Use the undo default local-preference command to restore the default value.

By default, the default local preference is 100.

Using this command can affect BGP route selection.

Examples

# In BGP view, set the default local preference to 180.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] default local-preference 180

5.1.14 default med

Syntax

default med med-value

undo default med

View

BGP view

Parameters

med-value: Default MED value, in the range 0 to 4294967295.

Description

Use the default med command to specify a default MED value.

Use the undo default med command to restore the default.

By default, the default med-value is 0.

Multi-exit discriminator (MED) is an external metric for routes. Different from local preference, MED is exchanged between ASs and will stay in the AS once it enters the AS. The route with a lower MED is preferred. When a router running BGP obtains several routes with an identical destination but different next-hops from various external peers, it will select the best route depending on the MED value. In the case that all other conditions are the same, the system first selects the route with the smallest MED as the best external route.

Examples

# In BGP view, configure the default MED as 25.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] default med 25

5.1.15 default-route imported

Syntax

default-route imported

undo default-route imported

View

BGP view

Parameters

None

Description

Use the default-route imported command to allow default route redistribution into the BGP routing table.

Use the undo default-route imported command to disallow the redistribution.

By default, default route redistribution is not allowed.

Using the default-route imported command cannot redistribute default routes. To do so, use the import-route command.

Related commands: import-route.

Examples

# In BGP view, allow default route redistribution from OSPF into BGP.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] default-route imported

[Sysname-bgp] import-route ospf 1

5.1.16 display bgp group

Syntax

display bgp group [ group-name ]

View

Any view

Parameters

group-name: Peer group name, a string of 1 to 47 characters.

Description

Use the display bgp group command to display the information of the peer group.

Examples

# Display the information of the peer group aaa.

<Sysname> display bgp group aaa

BGP peer-group is aaa

remote AS 200

Type : external

Maximum allowed prefix number: 4294967295

Threshold: 75%

Configured hold timer value: 180

Keepalive timer value: 60

Minimum time between advertisement runs is 30 seconds

Peer Preferred Value: 0

No routing policy is configured

Members:

Peer V AS MsgRcvd MsgSent OutQ PrefRcv Up/Down State

2.2.2.1 4 200 0 0 0 0 00:00:35 Active

Table 5-2 Description on the fields of the display bgp group command

Field	Description
BGP peer-group	Name of the BGP peer group
remote AS	AS number of peer group
type	Type of the BGP peer group: IBGP or EBGP
Maximum allowed prefix number	Maximum allowed prefix number
Threshold	Threshold value
Configured hold timer value	Holdtime interval
Keepalive timer value	Keepalive interval
Minimum time between advertisement runs	Minimum time between advertisement runs
Peer Preferred Value	Preferred value of the routes from the peer
No routing policy is configured	No routing policy is configured for the peer
Members	Detailed information of the members in the peer group
Peer	IPv4 address of the peer
V	BGP version running on peers
AS	AS number of the peers
MsgRcvd	Number of messages received
MsgSent	Number of messages sent
OutQ	Number of messages to be sent
PrefRcv	Number of prefixes received
Up/Down	The lasting time of a session/the lasting time of present state (when no session is established)
State	State machine of peer

5.1.17 display bgp network

Syntax

display bgp network

View

Any view

Parameters

None

Description

Use the display bgp network command to display routing information that has been advertised.

Examples

# Display routing information that has been advertised.

<Sysname> display bgp network

BGP Local Router ID is 10.1.4.2.

Local AS Number is 400.

Network Mask Route-policy Short-cut

100.1.2.0 255.255.255.0

100.1.1.0 255.255.255.0 Short-cut

Table 5-3 Description on the fields of the display bgp network command

Field	Description
BGP Local Router ID	BGP Local Router ID
Local AS Number	Local AS Number
Network	Network address
Mask	Mask
Route-policy	Routing policy
Short-cut	Short-cut route

5.1.18 display bgp paths

Syntax

display bgp paths [as-regular-expression]

View

Any view

Parameters

as-regular-expression: AS path regular expression.

Description

Use the display bgp paths command to display information about BGP paths.

Examples

# Display information about BGP paths matching the AS path regular expression.

<Sysname> display bgp paths ^200

Address Hash Refcount MED Path/Origin

0x5917100 11 1 200 300i

Table 5-4 Description on the fields of the display bgp paths command

Field	Description
Address	Route address in local database, in dotted hexadecimal notation
Hash	Hash index
Refcount	Count of routes that referenced the path
MED	MED of the path
Path	AS_PATH attribute of the path, recording the ASs it has passed, for avoiding routing loops
Origin	Origin attribute of the route:
	i	Indicates the route is interior to the AS. Summary routes and routes defined using the network command are considered IGP routes.
	e	Indicates that a route is learned from the exterior gateway protocol (EGP).
	?	Short for INCOMPLETE. It indicates that the origin of a route is unknown and the route is learned by other means.

5.1.19 display bgp peer

Syntax

display bgp peer [ ip-address { log-info | verbose } | group-name log-info | verbose ]

View

Any view

Parameters

ip-address: IP address of an peer to be displayed, in dotted decimal notation.

group-name: Name of a peer group to be displayed, a string of 1 to 47 characters.

log-info: Displays the log information of the specified peer.

verbose: Displays the detailed information of the peer/peer group.

Description

Use the display bgp peer command to display peer/peer group information.

Examples

# Display the detailed information of the peer 10.110.25.20.

<Sysname> display bgp peer 10.110.25.20 verbose

Peer: 10.110.25.20 Local: 2.2.2.2

Type: EBGP link

BGP version 4, remote router ID 1.1.1.1

BGP current state: Established, Up for 00h01m51s

BGP current event: RecvKeepalive

BGP last state: OpenConfirm

Port: Local - 1029 Remote - 179

Configured: Active Hold Time: 180 sec Keepalive Time: 60 sec

Received : Active Hold Time: 180 sec

Negotiated: Active Hold Time: 180 sec

Peer optional capabilities:

Peer support bgp multi-protocol extended

Peer support bgp route refresh capability

Address family IPv4 Unicast: advertised and received

Received: Total 5 messages, Update messages 1

Sent: Total 4 messages, Update messages 0

Maximum allowed prefix number: 4294967295

Threshold: 75%

Minimum time between advertisement runs is 30 seconds

Optional capabilities:

Route refresh capability has been enabled

Peer Preferred Value: 0

Routing policy configured:

No routing policy is configured

Table 5-5 Description on the fields of the display bgp peer command

Field	Description
Peer	IP address of the peer
Local	Local router ID
Type	Peer type: Internal as IBGP peers and External as EBGP peers.
BGP version	BGP protocol version
remote router ID	Router ID of the peer
BGP current state	Current state of the peer
BGP current event	Current event of the peer
BGP last state	Last state of the peer
Port	Port number of local router and its peer
Configured: Active Hold Time	Local holdtime interval
Keepalive Time	Local keepalive interval
Received: Active Hold Time	Remote holdtime interval
Negotiated: Active Hold Time	Negotiated holdtime interval
Peer optional capabilities	Optional capabilities supported by the peer, including BGP multiple extension and routing refresh.
Address family IPv4 Unicast	Routes are advertised and received in the form of IPv4 unicast
Received	Total numbers of received packets and updates
Sent	Total numbers of sent packets and updates
Maximum allowed prefix number	Maximum allowed prefix number
Threshold	Threshold value
Minimum time between advertisement runs	Minimum time between route advertisements
Optional capabilities	Optional capabilities enabled by the peer
Peer Preferred Value	Preferred value specified for the routes from the peer
Routing policy configured	Local routing policy

5.1.20 display bgp routing-table

Syntax

display bgp routing-table [ ip-address [ { mask | mask-length } [ longer-prefixes ] ] ]

View

Any view

Parameters

ip-address: Destination IP address.

mask: Network mask, in dotted decimal notation.

mask-length: Mask length, in the range 0 to 32.

longer-prefixes: Matches the longest prefix.

Description

Use the display bgp routing-table command to display specified BGP routing information in the BGP routing table.

Examples

# Display BGP routing table information.

<Sysname> display bgp routing-table

Total Number of Routes: 1

BGP Local router ID is 10.10.10.1

Status codes: * - valid, > - best, d - damped,

h - history, i - internal, s - suppressed, S - Stale

Origin : i - IGP, e - EGP, ? - incomplete

Network NextHop MED LocPrf PrefVal Path/Ogn

*> 40.40.40.0/24 20.20.20.1 0 200 300i

Table 5-6 Description on the fields of the display bgp routing command

Field	Description
Total Number of Routes	Total Number of Routes
BGP Local router ID	BGP Local router ID
Status codes	Status codes: * – valid > – best d – damped h – history i – internal (IGP) s – summary suppressed (suppressed) S – Stale
Origin	i – IGP (originated in the AS) e – EGP (learned through EGP) ? – incomplete (learned by other means)
Network	Destination network address
Next Hop	Next hop IP address
MED	MULTI_EXIT_DISC attribute
LocPrf	Local preference value
PrefVal	Preferred value of the route
Path	AS_PATH attribute, recording the ASs the packet has passed to avoid routing loops
PrefVal	Preferred value
Ogn	Origin attribute of the route, one of the following values:
	i	Indicates that the route is interior to the AS. Summary routes and the routes configured using the network command are considered IGP routes.
	e	Indicates that the route is learned via the exterior gateway protocol (EGP).
	?	Short for INCOMPLETE. It indicates that the origin of the route is unknown and the route is learned by other means.

5.1.21 display bgp routing-table as-path-acl

Syntax

display bgp routing-table as-path-acl as-path-acl-number

View

Any view

Parameters

as-path-acl-number: Displays routing information permitted by the AS path ACL, which is specifies with a number from 1 to 256.

Description

Use the display bgp routing as-path-acl command to display BGP routes permitted by an as-path ACL.

Examples

# Display BGP routes permitted by AS path ACL 1.

<Sysname> display bgp routing-table as-path-acl 1

BGP Local router ID is 20.20.20.1

Status codes: * - valid, > - best, d - damped,

h - history, i - internal, s - suppressed, S - Stale

Origin : i - IGP, e - EGP, ? - incomplete

Network NextHop MED LocPrf PrefVal Path/Ogn

*> 40.40.40.0/24 30.30.30.1 0 0 300i

Refer to Table 5-6 for description on the fields above.

5.1.22 display bgp routing-table cidr

Syntax

display bgp routing-table cidr

View

Any view

Parameters

None

Description

Use the display bgp routing-table cidr command to display BGP CIDR (Classless Inter-Domain Routing) routing information.

Examples

# Display BGP CIDR routing information.

<Sysname> display bgp routing-table cidr

BGP Local router ID is 20.20.20.1

Status codes: * - valid, > - best, d - damped,

h - history, i - internal, s - suppressed, S - Stale

Origin : i - IGP, e - EGP, ? - incomplete

Network NextHop MED LocPrf PrefVal Path/Ogn

*> 40.40.40.0/24 30.30.30.1 0 0 300i

Refer to Table 5-6 for description on the above fields.

5.1.23 display bgp routing-table community

Syntax

display bgp routing-table community [ aa:nn&<1-13> ] [ no-advertise | no-export | no-export-subconfed ] * [ whole-match ]

View

Any view

Parameters

aa:nn: Community number. Both aa and nn are in the range 0 to 65535.

&<1-13>: Argument before it can be entered up to 13 times.

no-advertise: Displays BGP routes that are not advertised to any peer.

no-export: Displays routes that are not advertised outside the AS. With a confederation configured, it displays routes that are not advertised outside the confederation, but can be advertised to other sub ASs in the confederation.

no-export-subconfed: Displays routes that are neither advertised outside the AS nor to other sub ASs in a configured confederation.

whole-match: Displays the exactly matched routes.

Description

Use the display bgp routing community command to display BGP routing information with the specified BGP community.

Examples

# Display routing information with the specified BGP community.

<Sysname> display bgp routing-table community 11:22

BGP Local router ID is 10.10.10.1

Status codes: * - valid, > - best, d - damped,

h - history, i - internal, s - suppressed, S - Stale

Origin : i - IGP, e - EGP, ? - incomplete

Network NextHop MED LocPrf PrefVal Path/Ogn

*> 10.10.10.0/24 0.0.0.0 0 0 i

*> 40.40.40.0/24 20.20.20.1 0 200 300i

Refer to Table 5-6 for description on the fields above.

5.1.24 display bgp routing-table community-list

Syntax

display bgp routing-table community-list { basic-community-list-number [ whole-match ] | adv-community-list-number }&<1-16>

View

Any view

Parameters

basic-community-list-number: Specifies a basic community-list number from 1 to 99.

adv-community-list-number: Specifies an advanced community-list number from 100 to 199.

whole-match: Displays routes exactly matching the specified basic-community-list.

&<1-16>: Specifies the argument before it can be entered up to 16 times.

Description

Use the display bgp routing-table community-list command to display BGP routing information matching the specified BGP community list.

Examples

# Display BGP routing information matching BGP community list 100.

<Sysname> display bgp routing-table community-list 100

BGP Local router ID is 30.30.30.1

Status codes: * - valid, > - best, d - damped,

h - history, i - internal, s - suppressed, S - Stale

Origin : i - IGP, e - EGP, ? - incomplete

Network NextHop MED LocPrf PrefVal Path/Ogn

*> 30.30.30.0/24 0.0.0.0 0 0 i

*> 40.40.40.0/24 0.0.0.0 0 0 i

Refer to Table 5-6 for description on the fields above.

5.1.25 display bgp routing-table dampened

Syntax

display bgp routing-table dampened

View

Any view

Parameters

None

Description

Use the display bgp routing-table dampened command to display dampened BGP routes.

Examples

# Display dampened BGP routes.

<Sysname> display bgp routing-table dampened

BGP Local router ID is 2.2.2.2

Status codes: * - valid, > - best, d - damped,

h - history, i - internal, s - suppressed, S - Stale

Origin : i - IGP, e - EGP, ? - incomplete

Network From Reuse Path/Origin

*d 77.0.0.0 12.1.1.1 00:29:20 100?

Table 5-7 Description on the fields of the display bgp routing-table dampened command

Field	Description
From	IP address from which the route was received
Reuse	Reuse time of the route

Refer to Table 5-6 for description on the other fields above.

5.1.26 display bgp routing-table dampening parameter

Syntax

display bgp routing-table dampening parameter

View

Any view

Parameters

None

Description

Use the display bgp routing-table dampening parameter command to display BGP route dampening parameters.

Related commands: dampening.

Examples

# Display BGP route dampening parameters.

<Sysname> display bgp routing-table dampening parameter

Maximum Suppress Time(in second) : 3069

Ceiling Value : 16000

Reuse Value : 750

HalfLife Time(in second) : 900

Suppress-Limit : 2000

Table 5-8 Description on the fields of the display bgp routing-table dampening parameter command

Field	Description
Maximum Suppress Time	Maximum Suppress Time
Ceiling Value	Upper limit of penalty value
Reuse Value	Limit for a route to be desuppressed
HalfLife Time	Half-life time of active routes
Suppress-Limit	Limit for a route to be suppressed

5.1.27 display bgp routing-table different-origin-as

Syntax

display bgp routing-table different-origin-as

View

Any view

Parameters

None

Description

Use the display bgp routing-table different-origin-as command to display BGP routes originating from different autonomous systems.

Examples

# Display BGP routes originating from different ASs.

<Sysname> display bgp routing-table different-origin-as

BGP Local router ID is 2.2.2.2

Status codes: * - valid, > - best, d - damped,

h - history, i - internal, s - suppressed, S - Stale

Origin : i - IGP, e - EGP, ? - incomplete

Network NextHop MED LocPrf PrefVal Path/Ogn

*> 55.0.0.0 12.1.1.1 0 0 100?

* 14.1.1.2 0 0 300?

Refer to Table 5-6 for description on the fields above.

5.1.28 display bgp routing-table flap-info

Syntax

display bgp routing-table flap-info [ regular-expression as-regular-expression | as-path-acl as-path-acl-number | ip-address [ { mask | mask-length } [ longer-match ] ] ]

View

Any view

Parameters

as-regular-expression: Displays route flap information that matches the AS path regular expression.

as-path-acl-number: Displays route flap information matching the AS path ACL. The number is in the range 1 to 256.

ip-address: Destination IP address.

mask: Mask, in dotted decimal notation.

mask-length: Mask length, in the range 0 to 32.

longer-match: Matches the longest prefix.

Description

Use the display bgp routing-table flap-info command to display BGP route flap statistics. If no parameter is specified, this command displays all BGP route flap statistics.

Examples

# Display BGP route flap statistics.

<Sysname> display bgp routing-table flap-info

BGP Local router ID is 2.2.2.2

Status codes: * - valid, > - best, d - damped,

h - history, i - internal, s - suppressed, S - Stale

Origin : i - IGP, e - EGP, ? - incomplete

Network From Flaps Duration Reuse Path/Origin

*> 55.0.0.0 12.1.1.1 2 00:00:16 100?

*d 77.0.0.0 12.1.1.1 5 00:34:02 00:27:08 100?

Table 5-9 Description on the fields of the display bgp routing flap-info command

Field	Description
From	Source IP address of the route
Flaps	Number of routing flaps
Duration	Duration time of the flap route
Reuse	Reuse time of the flap route

Refer to Table 5-6 for description on the other fields above.

5.1.29 display bgp routing-table peer

Syntax

display bgp routing-table peer ip-address { advertised-routes | received-routes } [ network-address [ mask | mask-length ] | statistic ]

View

Any view

Parameters

ip-address: IP address of a peer.

advertised-routes: Displays routing information advertised to the specified peer.

received-routes: Displays routing information received from the specified peer.

network-address: IP address of the destination network.

mask: Mask of the destination network, in dotted decimal notation.

mask-length: Mask length, in the range 0 to 32.

statistic: Displays route statistics.

Description

Use the display bgp routing-table peer command to display BGP routing information advertised to or received from the specified BGP peer.

Related commands: display bgp peer.

Examples

# Display BGP routing information advertised to BGP peer 20.20.20.1.

<Sysname> display bgp routing-table peer 20.20.20.1 advertised-routes

Total Number of Routes: 2

BGP Local router ID is 30.30.30.1

Status codes: * - valid, > - best, d - damped,

h - history, i - internal, s - suppressed, S - Stale

Origin : i - IGP, e - EGP, ? - incomplete

Network NextHop MED LocPrf PrefVal Path/Ogn

*> 30.30.30.0/24 0.0.0.0 0 0 i

*> 40.40.40.0/24 0.0.0.0 0 0 i

Refer to Table 5-6 for description on the fields above.

5.1.30 display bgp routing-table regular-expression

Syntax

display bgp routing-table regular-expression as-regular-expression

View

Any view

Parameters

as-regular-expression: AS regular expression.

Description

Use the display bgp routing-table regular-expression command to display BGP routing information matching the specified AS regular expression.

Examples

# Display BGP routing information matching AS regular expression 300$.

<Sysname> display bgp routing-table regular-expression 300$

BGP Local router ID is 20.20.20.1

Status codes: * - valid, > - best, d - damped,

h - history, i - internal, s - suppressed, S - Stale

Origin : i - IGP, e - EGP, ? - incomplete

Network NextHop MED LocPrf PrefVal Path/Ogn

*> 40.40.40.0/24 30.30.30.1 0 0 300i

Refer to Table 5-6 for description on the fields above.

5.1.31 display bgp routing-table statistic

Syntax

display bgp routing-table statistic

View

Any view

Parameters

None

Description

Use the display bgp routing-table statistic command to display BGP routing statistics.

Examples

# Display BGP routing statistics.

<Sysname> display bgp routing-table statistic

Total Number of Routes: 4

Table 5-10 Description on the fields of the display bgp routing-table statistic command

Field	Description
Total number of routes	Total number of routes

5.1.32 ebgp-interface-sensitive

Syntax

ebgp-interface-sensitive

undo ebgp-interface-sensitive

View

BGP view

Parameters

None

Description

Use the ebgp-interface-sensitive command to enable the clearing of EBGP session on any interface that becomes down.

Use the undo ebgp-interface-sensitive command to disable the function.

This function is enabled by default.

Examples

# In BGP view, enable the clearing of EBGP session on any interface that becomes down.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] ebgp-interface-sensitive

5.1.33 filter-policy export

Syntax

filter-policy { acl-number | ip-prefix ip-prefix-name } export [ direct | isis process-id | ospf process-id | rip process-id | static ]

undo filter-policy export [ direct | isis process-id | ospf process-id | rip process-id | static ]

View

BGP view

Parameters

acl-number: Number of an ACL used to filter outgoing redistributed routing information, ranging from 2000 to 3999.

ip-prefix-name: Name of an IP prefix list used to filter outgoing redistributed routing information, a string of 1 to 19 characters.

direct: Filters direct routes.

isis process-id: Filters outgoing routes redistributed from an ISIS process. The ID is in the range 1 to 65535.

ospf process-id: Filters outgoing routes redistributed from the OSPF process with an ID from 1 to 65535.

rip process-id: Filters outgoing routes redistributed from a RIP process. The ID is in the range 1 to 65535.

static: Filters static routes.

If no routing protocol is specified, all outgoing routes are filtered.

Description

Use the filter-policy export command to filter outgoing redistributed routes and only the routes permitted by the specified filter can be advertised.

Use the undo filter-policy export command to remove the filtering.

If no routing protocol is specified, the filtering applies to all outgoing redistributed routes.

By default, the filtering is not configured.

Examples

# In BGP view, reference ACL 2000 to filter all outgoing redistributed routes.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] filter-policy 2000 export

5.1.34 filter-policy import

Syntax

filter-policy { acl-number | ip-prefix ip-prefix-name } import

undo filter-policy import

View

BGP view

Parameters

acl-number: Number of an ACL used to filter incoming routing information, ranging from 2000 to 3999.

ip-prefix-name: Name of an IP prefix list used to filter incoming routing information, a string of 1 to 19 characters.

Description

Use the filter-policy import command to configure the filtering of incoming routing information.

Use the undo filter-policy import command to disable the filtering.

By default, incoming routing information is not filtered.

Examples

# In BGP view, reference ACL 2000 to filter incoming routing information.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] filter-policy 2000 import

5.1.35 graceful-restart

Syntax

graceful-restart

undo graceful-restart

View

BGP view

Parameters

None

Description

Use the graceful-restart command to enable BGP Graceful Restart capability.

Use the undo graceful-restart command to disable BGP Graceful Restart capability.

By default, BGP Graceful Restart capability is disabled.

Examples

# Enable the Graceful Restart capability for BGP process 100.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] graceful-restart

5.1.36 graceful-restart timer restart

Syntax

graceful-restart timer restart timer

undo graceful-restart timer restart

View

BGP view

Parameters

timer: Maximum time for a peer to reestablish a BGP session, in the range 3 to 600 seconds.

Description

Use the graceful-restart timer restart command to configure the maximum time for a peer to reestablish a BGP session.

Use the undo graceful-restart timer restart command to restore the default.

By default, the maximum time for a peer to reestablish a BGP session is 150 seconds.

Examples

# Configure the maximum time for a peer to reestablish a BGP session as 300 seconds.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] graceful-restart timer restart 300

5.1.37 graceful-restart timer wait-for-rib

Syntax

graceful-restart timer wait-for-rib timer

undo graceful-restart timer wait-for-rib

View

BGP view

Parameters

timer: Time to wait for the End-of-RIB marker, in the range 3 to 300 seconds.

Description

Use the graceful-restart timer wait-for-rib command to configure the time to wait for the End-of-RIB marker.

Use the undo graceful-restart timer wait-for-rib command to restore the default.

By default, the time to wait for the End-of-RIB marker is 180 seconds.

& Note:

l After a BGP session has been successfully (re)established, the End-of-RIB marker must be received within the time specified with this command.

l Using this command can speed up route convergence.

Examples

# Set the time to wait for the End-of-RIB marker to 100 seconds.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] graceful-restart timer wait-for-rib 100

5.1.38 group

Syntax

group group-name [ external | internal ]

undo group group-name

View

BGP view

Parameters

group-name: Name of a peer group, a string of 1 to 47 characters.

external: Creates an EBGP peer group, which can be the group of another sub AS in a confederation.

internal: Creates an IBGP peer group.

Description

Use the group command to create a peer group.

Use the undo group command to delete a peer group.

An IBGP peer group is created if neither internal nor external is specified.

Examples

# In BGP view, create an EBGP peer group test with AS number 200, and add EBGP peers 10.1.1.1 and 10.1.2.1 into the group.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] group test external

[Sysname-bgp] peer test as-number 200

[Sysname-bgp] peer 10.1.1.1 group test

[Sysname-bgp] peer 10.1.2.1 group test

5.1.39 import-route

Syntax

import-route protocol [ process-id [ med med-value | route-policy route-policy-name ] * ]

undo import-route protocol [ process-id ]

View

BGP view

Parameters

protocol: Redistributes routes from the routing protocol, which can be direct, isis, ospf, rip and static at present.

process-id: Process ID, in the range 1 to 65535. The default is 1. It is available only when the protocol is isis, ospf, or rip.

med-value: Specifies the MED value to be applied to redistributed routes, ranging from 0 to 4294967295. If the argument is not specified, the cost of the redistributed route is used as its MED in the BGP routing domain.

route-policy-name: Name of a routing policy used to filter redistributed routes, a string of 1 to 19 characters.

Description

Use the import-route command to configure BGP to redistribute routes from a specified routing protocol and advertise redistributed routes.

Use the undo import-route command to disable route redistribution from a routing protocol.

By default, BGP does not redistribute routes from other protocols.

The ORIGIN attribute of routes redistributed with the import-route command is incomplete.

Examples

# In BGP view, redistribute routes from RIP.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] import-route rip

5.1.40 log-peer-change

Syntax

log-peer-change

undo log-peer-change

View

BGP view

Parameters

None

Description

Use the log-peer-change command to enable the global BGP logging on peers going up and down.

Use the undo log-peer-change command to disable the function.

By default, the function is enabled.

Examples

# Enable BGP logging on peers going up and down.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] log-peer-change

5.1.41 network

Syntax

network ip-address [ mask | mask-length ] [ short-cut | route-policy route-policy-name ]

undo network ip-address [ mask | mask-length ] [ short-cut ]

View

BGP view

Parameters

ip-address: Destination IP address.

mask: Mask of the network address, in dotted decimal notation.

mask-length: Mask length, in the range 0 to 32.

short-cut: Specifies the route to use the local preference. If the route is an EBGP route whose preference is higher than the local one, using this keyword can configure the EBGP route to use the local preference, so the route is hard to become the optimal route.

route-policy-name: Routing policy applied to the route. The name is a string of 1 to 19 characters.

Description

Use the network command to advertise a network to the BGP routing table.

Use the undo network command to remove a network from the routing table.

By default, no network route is advertised.

Note that:

l The network route must be in the local IP routing table, and using a routing policy makes route management more flexible.

l The route advertised to the BGP routing table using the network command has the ORIGIN attribute as IGP.

Examples

# In BGP view, advertise the network segment 10.0.0.0/16.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] network 10.0.0.0 255.255.0.0

5.1.42 peer advertise-community

Syntax

peer { group-name | ip-address } advertise-community

undo peer { group-name | ip-address } advertise-community

View

BGP view

Parameters

group-name: Name of a peer group, a string of 1 to 47 characters.

ip-address: IP address of a peer.

Description

Use the peer advertise-community command to advertise the community attribute to a peer/peer group.

Use the undo peer advertise-community command to disable the community attribute advertisement to a peer/peer group.

By default, no community attribute is advertised to any peer group/peer.

Related commands: ip community-list, if-match community, apply community.

Examples

# In BGP view, advertise the community attribute to peer group test.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] peer test advertise-community

5.1.43 peer advertise-ext-community

Syntax

peer { group-name | ip-address } advertise-ext-community

undo peer { group-name | ip-address } advertise-ext-community

View

BGP view

Parameters

group-name: Name of a peer group, a string of 1 to 47 characters.

ip-address: IP address of a peer.

Description

Use the peer advertise-ext-community command to advertise the extended community attribute to a peer/peer group.

Use the undo peer advertise-ext-community command to disable the advertisement.

By default, no extended community attribute is advertised to a peer/peer group.

Related commands: ip extcommunity-list, if-match extcommunity, apply extcommunity.

Examples

# In BGP view, advertise the extended community attribute to the peer group test.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] peer test advertise-ext-community

5.1.44 peer allow-as-loop

Syntax

peer { group-name | ip-address } allow-as-loop [ number ]

undo peer { group-name | ip-address } allow-as-loop

View

BGP view

Parameters

group-name: Name of a peer group, a string of 1 to 47 characters.

ip-address: IP address of a peer.

number: Specifies the repeating times of the local AS number, in the range 1 to 10. The default number is 1.

Description

Use the peer allow-as-loop command to allow the local AS number to exist in the AS_PATH attribute of routes from a peer/peer group, and to configure the repeating times of the local AS number.

Use the undo peer allow-as-loop command to remove the configuration.

By default, the local AS number is not allowed.

Related commands: display bgp routing-table peer.

Examples

# In BGP view, configure the repeating times of the local AS number as 2 for routes from peer 1.1.1.1.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] peer 1.1.1.1 allow-as-loop 2

5.1.45 peer as-number

Syntax

peer { group-name | ip-address } as-number as-number

undo peer group-name as-number

undo peer ip-address

View

BGP view

Parameters

group-name: Name of a peer group, a string of 1 to 47 characters.

ip-address: IP address of a peer.

as-number: AS number of the peer or peer group, in the range 1 to 65535.

Description

Use the peer as-number command to specify the AS number for a peer/peer group.

Use the undo peer as-number command to delete the AS number of a peer group.

Use the undo peer command to delete a peer.

By default, no AS number is configured for a peer/peer group.

Examples

# In BGP view, specify the AS number of the peer group test as 100.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] peer test as-number 100

5.1.46 peer as-path-acl

Syntax

peer { group-name | ip-address } as-path-acl as-path-acl-number { export | import }

undo peer { group-name | ip-address } as-path-acl as-path-acl-number { export | import }

View

BGP view

Parameters

group-name: Name of a peer group, a string of 1 to 47 characters.

ip-address: IP address of a peer.

as-path-acl-number: AS path ACL number, in the range 1 to 256.

export: Filters outgoing routes.

import: Filters incoming routes.

Description

Use the peer as-path-acl command to configure the filtering of routes incoming from or outgoing to a peer/peer group based on a specified AS path ACL.

Use the undo peer as-path-acl command to remove the configuration.

By default, no AS path ACL filtering is configured.

Related commands: ip as-path-acl, if-match as-path, apply as-path.

Examples

# In BGP view, reference the AS path ACL 1 to filter routes outgoing to the peer group test.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] peer test as-path-acl 1 export

5.1.47 peer capability-advertise conventional

Syntax

peer { group-name | ip-address } capability-advertise conventional

undo peer { group-name | ip-address } capability-advertise conventional

View

BGP view

Parameters

group-name: Name of a peer group, a string of 1 to 47 characters.

ip-address: IP address of a peer.

Description

Use the peer capability-advertise conventional command to disable BGP multi-protocol extension and route refresh for a peer/peer group.

Use the undo peer capability-advertise conventional command to enable BGP multi-protocol extension and route refresh for a peer/peer group.

By default, BGP multi-protocol extension and route refresh are enabled.

Examples

# In BGP view, disable multi-protocol extension and route refresh for peer 160.89.2.33.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] peer 160.89.2.33 as-number 100

[Sysname-bgp] peer 160.89.2.33 capability-advertise conventional

5.1.48 peer capability-advertise route-refresh

Syntax

peer { group-name | ip-address } capability-advertise route-refresh

undo peer { group-name | ip-address } capability-advertise route-refresh

View

BGP view

Parameters

group-name: Name of a peer group, a string of 1 to 47 characters.

ip-address: IP address of a peer.

Description

Use the peer capability-advertise route-refresh command to enable the BGP route refresh capability.

Use the undo peer capability-advertise route-refresh command to disable the capability.

The capability is enabled by default.

Examples

# In BGP view, enable BGP route refresh for peer 160.89.2.33.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] peer 160.89.2.33 as-number 100

[Sysname-bgp] peer 160.89.2.33 capability-advertise route-refresh

5.1.49 peer connect-interface

Syntax

peer { group-name | ip-address } connect-interface interface-type interface-number

undo peer { group-name | ip-address } connect-interface

View

BGP view

Parameters

group-name: Name of a peer group, a string 1 to 47 characters.

ip-address: IP address of a peer.

interface-type interface-number: Specifies the type and number of the interface.

Description

Use the peer connect-interface command to specify the source interface for establishing TCP connections to a peer/peer group.

Use the undo peer connect-interface command to restore the default.

By default, BGP uses the outbound interface of the best route to the BGP peer/peer group as the source interface for establishing a TCP connection to the peer/peer group.

Note that:

To establish multiple BGP connections to another BGP router, you need to specify on the local router the respective source interfaces for establishing TCP connections to the peers on the peering BGP router; otherwise, the local BGP router may fail to establish TCP connections to the peers when using the outbound interfaces of the best routes as the source interfaces.

Examples

# In BGP view, specify loopback 0 as the source interface for routing updates to the peer group test.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] peer test connect-interface loopback 0

5.1.50 peer default-route-advertise

Syntax

peer { group-name | ip-address } default-route-advertise [ route-policy route-policy-name ]

undo peer { group-name | ip-address } default-route-advertise

View

BGP view

Parameters

group-name: Name of a peer group, a string of 1 to 47 characters.

ip-address: IP address of a peer.

route-policy-name: Routing policy name, a string of 1 to 19 characters.

Description

Use the peer default-route-advertise command to advertise a default route to a peer/peer group.

Use the undo peer default-route-advertise command to disable default route advertisement to a peer/peer group.

By default, no default route is advertised to a peer/peer group.

With this command used, the router unconditionally sends a default route with the next hop being itself to the peer/peer group regardless of whether the default route is available in the routing table.

Examples

# In BGP view, advertise a default route to peer group test.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] peer test default-route-advertise

5.1.51 peer description

Syntax

peer { group-name | ip-address } description description-text

undo peer { group-name | ip-address } description

View

BGP view

Parameters

group-name: Name of a peer group, a string of 1 to 47 characters.

ip-address: IP address of a peer.

description-text: Description information for the peer/peer group, a string of 1 to 79 characters.

Description

Use the peer description command to configure the description information for a peer/peer group.

Use the undo peer description command to remove the description information of a peer/peer group.

By default, no description information is configured for a peer/peer group.

Create a peer/peer group before configuring a description for it.

Related commands: display bgp peer.

Examples

# In BGP view, configure the description information of the peer group test as ISP1.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] peer test description ISP1

5.1.52 peer ebgp-max-hop

Syntax

peer { group-name | ip-address } ebgp-max-hop [ hop-count ]

undo peer { group-name | ip-address } ebgp-max-hop

View

BGP view

Parameters

group-name: Name of a peer group, a string of 1 to 47 characters.

ip-address: IP address of a peer.

hop-count: Maximum hop count, in the range 1 to 255. The default is 64.

Description

Use the peer ebgp-max-hop command to allow establishing an EBGP connection with a peer/peer group that is on an indirectly connected network.

Use the undo peer ebgp-max-hop command to restore the default.

By default, this feature is disabled.

You can use the argument hop-count to specify the maximum route hop count of the EBGP connection.

Examples

# In BGP view, allow establishing the EBGP connection with the peer group test that is on an indirectly connected network.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] peer test ebgp-max-hop

5.1.53 peer enable

Syntax

peer ip-address enable

undo peer ip-address enable

View

BGP view

Parameters

ip-address: IP address of a peer.

Description

Use the peer enable command to enable the specified peer.

Use the undo peer enable command to disable the specified peer.

By default, the BGP peer is enabled.

If a peer is disabled, the router will not exchange routing information with the peer.

Examples

# Disable peer 18.10.0.9.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] peer 18.10.0.9 group group1

[Sysname-bgp] undo peer 18.10.0.9 enable

5.1.54 peer fake-as

Syntax

peer { group-name | ip-address } fake-as as-number

undo peer { group-name | ip-address } fake-as

View

BGP view

Parameters

group-name: Name of a peer group, a string of 1 to 47 characters.

ip-address: IP address of a peer.

as-number: Local autonomous system number, in the range 1 to 65535.

Description

Use the peer fake-as command to configure a fake local AS number for a peer or peer group.

Use the undo peer fake-as command to remove the configuration.

By default, no fake local AS number is configured for a peer or peer group.

& Note:

The peer fake-as command is only applicable to an EBGP peer or peer group.

Examples

# In BGP view, configure a fake AS number of 200 for the peer group test.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] peer test fake-as 200

5.1.55 peer filter-policy

Syntax

peer { group-name | ip-address } filter-policy acl-number { export | import }

undo peer { group-name | ip-address } filter-policy [ acl-number ] { export | import }

View

BGP view

Parameters

group-name: Name of a peer group, a string of 1 to 47 characters.

ip-address: IP address of a peer.

acl-number: ACL number, in the range 2000 to 3999.

export: Applies the filter-policy to routes advertised to the peer/peer group.

import: Applies the filter-policy to routes received from the peer/peer group.

Description

Use the peer filter-policy command to configure an ACL-based filter policy for a peer or peer group.

Use the undo peer filter-policy command to remove the configuration.

By default, no ACL-based filter policy is configured for a peer or peer group.

Related commands: peer as-path-acl.

Examples

# In BGP view, apply the ACL 2000 to filter routes advertised to the peer group test.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] peer test filter-policy 2000 export

5.1.56 peer group

Syntax

peer ip-address group group-name [ as-number as-number ]

undo peer ip-address group group-name

View

BGP view

Parameters

group-name: Name of a peer group, a string of 1 to 47 characters.

ip-address: IP address of a peer.

as-number: AS number of the peer, in the range 1 to 65535.

Description

Use the peer group command to add a peer to a peer group.

Use the undo peer group command to delete a specified peer from a peer group.

By default, no peer is added into a peer group.

Examples

# In BGP view, add the peer 10.1.1.1 to the EBGP peer group test.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] group test external

[Sysname-bgp] peer test as-number 2004

[Sysname-bgp] peer 10.1.1.1 group test

5.1.57 peer ignore

Syntax

peer { group-name | ip-address } ignore

undo peer { group-name | ip-address } ignore

View

BGP view

Parameters

group-name: Name of a peer group, a string of 1 to 47 characters.

ip-address: IP address of a peer.

Description

Use the peer ignore command to disable session establishment with a peer or peer group.

Use the undo peer ignore command to remove the configuration.

By default, session establishment with a peer or peer group is allowed.

After the peer ignore command is executed, the system disables the session with the specified peer or peer group and clears all the related routing information. For a peer group, this means all sessions with the peer group will be tore down.

Examples

# In BGP view, disable session establishment with peer 10.10.10.10.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] peer 10.10.10.10 ignore

5.1.58 peer ip-prefix

Syntax

peer { group-name | ip-address } ip-prefix ip-prefix-name { export | import }

undo peer { group-name | ip-address } ip-prefix { export | import }

View

BGP view

Parameters

group-name: Name of a peer group, a string of 1 to 47 characters.

ip-address: IP address of a peer.

ip-prefix-name: IP prefix list name, a string of 1 to 19 characters.

export: Applies the filter to routes advertised to the specified peer/peer group.

import: Applies the filter to routes received from the specified peer/peer group.

Description

Use the peer ip-prefix command to reference an IP prefix list to filter routes received from or advertised to a peer or peer group.

Use the undo peer ip-prefix command to remove the configuration.

By default, no IP prefix list is specified.

Examples

# In BGP view, use the IP prefix list list 1 to filter routes advertised to the peer group test.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] peer test ip-prefix list1 export

5.1.59 peer keep-all-routes

Syntax

peer { group-name | ip-address } keep-all-routes

undo peer { group-name | ip-address } keep-all-routes

View

BGP view

Parameters

group-name: Name of a peer group, a string of 1 to 47 characters.

ip-address: IP address of a peer.

Description

Use the peer keep-all-routes command to save original routing information from a peer or peer group, even routes that failed to pass the inbound policy (if configured).

Use the undo peer keep-all-routes command to disable this function.

By default, the function is not enabled.

Examples

# In BGP view, save routing information from peer 131.100.1.1.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] peer 131.100.1.1 as-number 200

[Sysname-bgp] peer 131.100.1.1 keep-all-routes

5.1.60 peer log-change

Syntax

peer { group-name | ip-address } log-change

undo peer { group-name | ip-address } log-change

View

BGP view

Parameters

group-name: Name of a peer group, a string of 1 to 47 characters.

ip-address: IP address of a peer.

Description

Use the peer log-change command to enable the logging of session state and event information for a specified peer or peer group.

Use the undo peer log-change command to remove the configuration.

The logging is enabled by default.

Examples

# In BGP view, enable the logging of session state and event information for peer group test.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] peer test log-change

5.1.61 peer next-hop-local

Syntax

peer { group-name | ip-address } next-hop-local

undo peer { group-name | ip-address } next-hop-local

View

BGP view

Parameters

group-name: Name of a peer group, a string of 1 to 47 characters.

ip-address: IP address of a peer.

Description

Use the peer next-hop-local command to specify the router as the next hop for routes to a peer/peer group.

Use the undo peer next-hop-local command to remove the configuration.

By default, routes advertised to an EBGP peer/peer group take the local router as the next hop, while routes to an IBGP peer/peer group do not take the local router as the next hop.

Examples

# In BGP view, set the next hop of routes advertised to peer group test to the router itself.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] peer test next-hop-local

5.1.62 peer password

Syntax

peer { group-name | ip-address } password { cipher | simple } password

undo peer { group-name | ip-address } password

View

BGP view

Parameters

group-name: Name of a peer group, a string of 1 to 47 characters.

ip-address: IP address of a peer.

cipher: Displays the configured password in cipher text format.

simple: Displays the configured password in plain text format.

password: Password, a string of 1 to 80 characters when the simple keyword is used, or when the cipher keyword and plain text password are used; a string of 108 characters when the cipher text password and the cipher keyword are used.

Description

Use the peer password command to configure BGP to perform MD5 authentication when a TCP connection is being established with a peer/peer group.

Use the undo peer password command to disable the function.

By default, no MD5 authentication is performed for TCP connection establishment.

Once MD5 authentication is enabled, both parties must be configured with the same authentication mode and password. Otherwise, the TCP connection will not be set up.

Examples

# In BGP view, perform MD5 authentication on the TCP connection set up between the local router 10.1.100.1 and the peer router 10.1.100.2.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] peer 10.1.100.2 password simple aabbcc

# Perform the similar configuration on the peer.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] peer 10.1.100.1 password simple aabbcc

5.1.63 peer preferred-value

Syntax

peer { group-name | ip-address } preferred-value value

undo peer { group-name | ip-address } preferred-value

View

BGP view

Parameters

group-name: Name of a peer group, a string of 1 to 47 characters.

ip-address: IP address of a peer.

value: Preferred value, in the range 0 to 65535.

Description

Use the peer preferred-value command to assign a preferred value to routes received from a peer or peer group.

Use the undo peer preferred-value command to restore the default value.

The default preferred value is 0.

Routes learned from a peer have an initial preferred value.

Among multiple routes that have the same destination/mask and are learned from different peers, the one with the biggest preferred value is selected as the route to the network.

Note that:

If you both reference a routing policy and use the peer { group-name | ip-address } preferred-value value command to set a preferred value for routes from a peer, the routing policy sets a specified non-zero preferred value for routes matching it. Other routes not matching the routing policy uses the value set with the command. If the preferred value specified in the routing policy is zero, the routes matching it will also use the value set with the command. For information about using a routing policy to set a preferred value, refer to the command peer { group-name | ip-address } route-policy route-policy-name { export | import } and apply preferred-value preferred-value.

Examples

# In BGP view, configure the preferred value as 50 for routes from peer 131.108.1.1.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] peer 131.108.1.1 preferred-value 50

5.1.64 peer public-as-only

Syntax

peer { group-name | ip-address } public-as-only

undo peer { group-name | ip-address } public-as-only

View

BGP view

Parameters

group-name: Name of a peer group, a string of 1 to 47 characters.

ip-address: IP address of a peer.

Description

Use the peer public-as-only command to not keep private AS numbers in BGP updates sent to a peer/peer group.

Use the undo peer public-as-only command to keep private AS numbers in BGP updates sent to a peer/peer group.

By default, BGP updates carry private AS numbers.

The command does not take effect if the BGP update has both public and private AS numbers. The range of private AS number is from 64512 to 65535.

Examples

# In BGP view, carry no private AS number in BGP updates sent to the peer test.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] peer test public-as-only

5.1.65 peer reflect-client

Syntax

peer { group-name | ip-address } reflect-client

undo peer { group-name | ip-address } reflect-client

View

BGP view

Parameters

group-name: Name of a peer group, a string of 1 to 47 characters.

ip-address: IP address of a peer.

Description

Use the peer reflect-client command to configure the router as a route reflector and specify a peer/peer group as a client.

Use the undo peer reflect-client command to remove the configuration.

By default, neither route reflector nor client is configured.

Related commands: reflect between-clients and reflect cluster-id.

Examples

# In BGP view, configure the local device as a route reflector and specify the IBGP peer group test as a client.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] peer test reflect-client

5.1.66 peer route-limit

Syntax

peer { group-name | ip-address } route-limit limit [ percentage ]

undo peer { group-name | ip-address } route-limit

View

BGP view

Parameters

group-name: Name of a peer group, a string of 1 to 47 characters.

ip-address: IP address of a peer.

limit: Upper limit of IP prefixes that can be received from the peer or peer group, in the range 1 to 12288.

percentage: If the number of received routes reaches the specified percentage of the upper limit, the system will generate alarm information. The percentage is in the range from 1 to 100. The default is 75.

Description

Use the peer route-limit command to set the maximum number of routes that can be received from a peer/peer group.

Use the undo peer route-limit command to restore the default.

The number is unlimited by default.

Examples

# In BGP view, set the number of routes that can be received from peer 129.140.6.6 to 10000.

<Sysname> system-view

[Sysname] bgp 109

[Sysname-bgp] peer 129.140.6.6 as-number 110

[Sysname-bgp] peer 129.140.6.6 route-limit 10000

5.1.67 peer route-policy

Syntax

peer { group-name | ip-address } route-policy route-policy-name { export | import }

undo peer { group-name | ip-address } route-policy route-policy-name { export | import }

View

BGP view

Parameters

group-name: Name of a peer group, a string of 1 to 47 characters.

ip-address: IP address of a peer.

route-policy-name: Routing policy name, a string of 1 to 19 characters.

export: Applies the routing policy to routes outgoing to the peer (or peer group).

import: Applies the routing policy to routes incoming from the peer (or peer group).

Description

Use the peer route-policy command to apply a routing policy to routes incoming from or outgoing to a peer or peer group.

Use the undo peer route-policy command to remove the configuration.

By default, no inbound/outbound routing policy is configured for the peer/peer group.

The peer route-policy command does not apply the if-match interface clause in the referenced routing policy. Refer to Routing Policy Commands.

Examples

# In BGP view, apply routing policy test-policy to routes outgoing to peer group test.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] peer test route-policy test-policy export

5.1.68 peer route-update-interval

Syntax

peer { group-name | ip-address } route-update-interval seconds

undo peer { group-name | ip-address } route-update-interval

View

BGP view

Parameters

group-name: Name of a peer group, a sting of 1 to 47 characters.

ip-address: IP address of a peer.

seconds: Minimum interval for sending the same update message. The range is 5 to 600 seconds.

Description

Use the peer route-update-interval command to specify the interval for sending the same update to a peer/peer group.

Use the undo peer route-update-interval command to restore the default value.

By default, the interval is 5 seconds for IBGP peers, and 30 seconds for EBGP peers.

Examples

# In BGP view, specify the interval for sending the same update to peer group test as 10 seconds.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] peer test as-number 100

[Sysname-bgp] peer test route-update-interval 10

5.1.69 peer substitute-as

Syntax

peer { group-name | ip-address } substitute-as

undo peer { group-name | ip-address } substitute-as

View

BGP view

Parameters

group-name: Name of a peer group, a sting of 1 to 47 characters.

ip-address: IP address of a peer.

Description

Use the peer substitute-as command to replace the AS number of a peer/peer group in the AS_PATH attribute with the local AS number.

Use the undo peer substitute-as command to remove the configuration.

No AS number is replaced by default.

Examples

# In BGP view, substitute local AS number for AS number of peer 1.1.1.1.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] peer 1.1.1.1 substitute-as

5.1.70 peer timer

Syntax

peer { group-name | ip-address } timer keepalive keepalive hold holdtime

undo peer { group-name | ip-address } timer

View

BGP view

Parameters

group-name: Name of a peer group, a sting of 1 to 47 characters.

ip-address: IP address of a peer.

keepalive: Keepalive interval in seconds, ranging from 1 to 21845.

holdtime: Holdtime interval in seconds, ranging from 3 to 65535.

Description

Use the peer timer command to configure the keepalive interval and holdtime interval for a peer or peer group.

Use the undo peer timer command to restore the default.

By default, the keepalive and holdtime are 60s and 180s respectively.

Note that:

l The timer configured with this command is preferred to the timer configured with the timer command.

l The holdtime interval must be at least three times the keepalive interval.

Related commands: timer.

Examples

# In BGP view, configure the keepalive interval and holdtime interval for peer group test as 40s and 120s.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] peer test timer keepalive 40 hold 120

5.1.71 preference

Syntax

preference { external-preference internal-preference local-preference | route-policy route-policy-name }

undo preference

View

BGP view

Parameters

external-preference: Preference of EBGP routes, in the range 1 to 255.

internal-preference: Preference of IBGP routes, in the range 1 to 255.

local-preference: Preference of local routes, in the range 1 to 255.

route-policy-name: Routing policy name, a string of 1 to 19 characters. Using the routing policy can set a preference for routes passing through it. The default value applies to routes filtered out.

Description

Use the preference command to configure preferences for external, internal, and local routes.

Use the undo preference command to restore the default.

For external-preference, internal-preference and local-preference, the bigger the preference value is, the lower the preference is, and the default values are 255, 255, 130 respectively.

Examples

# In BGP view, configure preferences for EBGP, IBGP and local routes as 20, 20 and 200.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] preference 20 20 200

5.1.72 reflect between-clients

Syntax

reflect between-clients

undo reflect between-clients

View

BGP view

Parameters

None

Description

Use the reflect between-clients command to enable route reflection between clients.

Use the undo reflect between-clients command to disable this function.

By default, route reflection between clients is enabled.

After a route reflector is configured, it reflects the routes of a client to other clients. If the clients of a route reflector are fully meshed, you need disable route reflection between clients to reduce routing costs.

Related commands: reflector cluster-id and peer reflect-client.

Examples

# Disable route reflection between clients.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] undo reflect between-clients

5.1.73 reflector cluster-id

Syntax

reflector cluster-id cluster-id

undo reflector cluster-id

View

BGP view

Parameters

cluster-id: Cluster ID of the route reflector, an integer from 1 to 4294967295 (the integer is translated into an IP address by the system) or an IP address.

Description

Use the reflector cluster-id command to configure the cluster ID of the route reflector.

Use the undo reflector cluster-id command to remove the configured cluster ID.

By default, each route reflector uses its router ID as the cluster ID.

Usually, there is only one route reflector in a cluster. The router ID of the route reflector is the ID of the cluster. You can configure multiple route reflectors to improve the stability of the network. In this case, using this command can configure the identical cluster ID for all the route reflectors to avoid routing loops.

Related commands: reflect between-clients and peer reflect-client.

Examples

# Set the cluster ID to 80.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] reflector cluster-id 80

5.1.74 refresh bgp

Syntax

refresh bgp { all | ip-address | group group-name | external | internal } { export | import }

View

User view

Parameters

all: Soft-resets all BGP connections.

ip-address: Soft-resets the BGP connection to a peer.

group-name: Soft-resets connections to a peer group, name of which is a sting of 1 to 47 characters.

external: EBGP connection.

internal: IBGP connection.

export: Outbound soft reset.

import: Inbound soft reset.

Description

Use the refresh bgp command to perform soft reset on specified BGP connections. Using this function can refresh the BGP routing table without tearing down BGP connections and apply a newly configured routing policy.

To perform BGP soft reset, all routers in the network must support route-refresh. If a router not supporting route-refresh exists in the network, you need to configure the peer keep-all-routes command to save all routing updates before performing soft reset.

Examples

# Perform inbound BGP soft reset.

<Sysname> refresh bgp all import

5.1.75 reset bgp

Syntax

reset bgp { all | as-number | ip-address [ flap-info ] | group group-name | external | internal }

View

User view

Parameters

all: Resets all BGP connections.

as-number: Resets BGP connections to peers in the AS.

ip-address: Specifies the IP address of a peer with which to reset the connection.

flap-info: Clears history information of routing flap.

group group-name: Specifies to reset connections with the specified BGP peer group.

external: Resets all the EBGP connections.

internal: Resets all the IBGP connections.

Description

Use the reset bgp command to reset specified BGP connections.

Examples

# Reset all the BGP connections.

<Sysname> reset bgp all

5.1.76 reset bgp dampening

Syntax

reset bgp dampening [ ip-address [ mask | mask-length ] ]

View

User view

Parameters

ip-address: Destination IP address of a route.

mask: Mask, in dotted decimal notation.

mask-length: Mask length, in the range 0 to 32.

Description

Use the reset bgp dampening command to clear route dampening information and release suppressed routes.

Related commands: dampening, display bgp routing-table dampened.

Examples

# Clear damping information of route 20.1.0.0/16 and release suppressed route.

<Sysname> reset bgp dampening 20.1.0.0 255.255.0.0

5.1.77 reset bgp flap-info

Syntax

reset bgp flap-info [ regexp as-path-regexp | as-path-acl as-path-acl-number | ip-address [ mask | mask-length ] ]

View

User view

Parameters

as-path-regexp: Clears the flap statistics of routes matching the AS path regular expression.

as-path-acl-number: Clears the flap statistics of routes matching an AS path ACL, number of which is in the range 1 to 256.

ip-address: Clears the flap statistics of a route.

mask: Network mask, in dotted decimal notation.

mask-length: Mask length, in the range 0 to 32.

Description

Use the reset bgp flap-info command to clear the flap statistics of routes matching the specified filter.

The flap statistics of all the routes will be cleared if no parameter is specified.

Examples

# Clear the flap statistics of all routes matching AS path ACL 10.

<Sysname> reset bgp flap-info as-path-acl 10

5.1.78 reset bgp ipv4 all

Syntax

reset bgp ipv4 all

View

User view

Parameters

None

Description

Use the reset bgp ipv4 all command to reset all the BGP connections of IPv4 unicast address family.

Examples

# Reset all the BGP connections of IPv4 unicast address family.

<Sysname> reset bgp ipv4 all

5.1.79 router-id

Syntax

router-id router-id

undo router-id

View

BGP view

Parameters

router-id: Router ID in IP address format.

Description

Use the router-id command to specify a router ID.

Use the undo router-id command to remove the router ID.

To run BGP protocol, a router must have a router ID, which is an unsigned 32-bit integer, the unique ID of the router in the AS.

You can specify a router ID manually. If not, the system selects an IP address as the router ID. The selection sequence is the highest IP address among loopback interface addresses; if not available, then the highest IP address of interfaces. It is recommended to specify a loopback interface address as the router ID to enhance network reliability.

Only when the interface with the selected Router ID or the manual Router ID is deleted will the system select another ID for the router.

Examples

# Specifies the Router ID as 10.18.4.221.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] router-id 10.18.4.221

5.1.80 summary automatic

Syntax

summary automatic

undo summary automatic

View

BGP view

Parameters

None

Description

Use the summary automatic command to enable automatic summarization for redistributed subnets.

Use the undo summary automatic command to disable automatic summarization.

By default, automatic summarization is disabled.

Note that:

l Neither the default route nor the routes imported using the network command can be summarized automatically.

l With this feature enabled, BGP limits the subnets redistribution from IGP to reduce the size of routing table.

Examples

# In BGP view, enable automatic summarization.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] summary automatic

5.1.81 synchronization

Syntax

synchronization

undo synchronization

View

BGP view

Parameters

None

Description

Use the synchronization command to enable the synchronization between the BGP and IGP routes.

Use the undo synchronization command to disable the synchronization.

The feature is disabled by default.

With this feature enabled and when a non-BGP router is responsible for forwarding packets in an AS, BGP speakers in the AS cannot advertise routing information to other ASs unless all routers in the AS know the latest routing information.

When a BGP router receives an IBGP route, it checks only whether the next hop is reachable by default. If the synchronization is enabled, the IBGP route is synchronized and advertised to EBGP peers only when the route is also advertised by IGP. Otherwise, the IBGP route cannot be advertised to EBGP peers.

Examples

# Enable the synchronization between BGP and IGP routes.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] synchronization

5.1.82 timer

Syntax

timer keepalive keepalive hold holdtime

undo timer

View

BGP view

Parameters

keepalive: Keepalive interval in seconds, ranging from 1 to 21845.

holdtime: Holdtime interval in seconds, ranging from 3 to 65535.

Description

Use the timer command to configure BGP keepalive interval and holdtime interval.

Use the undo timer command to restore the default.

By default, BGP keepalive and holdtime intervals are 60s and 180s.

Note that:

l Timer configured using the peer timer command is preferred to the timer configured using this command.

l The holdtime interval must be at least three times the keepalive interval.

l The configured timer applies to all the BGP peers, while it becomes valid only after the corresponding BGP connections are reset.

Related commands: peer timer.

Examples

# Configure keepalive interval and holdtime interval as 40s and 120s.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] timer keepalive 60 hold 180

Chapter 6 Routing Policy Configuration Commands

& Note:

l The term “router” in this document refers to a generic router or a Layer 3 switch running routing protocols.

l Routing policy common configuration commands are applicable to both IPv4 and IPv6.

6.1 Routing Policy Common Configuration Commands

6.1.1 apply as-path

Syntax

apply as-path as-number&<1-10> [ replace ]

undo apply as-path

View

Routing policy view

Parameters

as-number: Autonomous system number, in the range of 1 to 65535.

&<1-10>: Indicates you can enter as-number up to 10 times.

replace: Replaces the original AS number.

Description

Use the apply as-path command to apply the specified AS numbers to BGP routes.

Use the undo apply as-path command to remove the clause configuration.

No AS_PATH attribute is set by default.

With the replace keyword, using the apply as-path command replaces the original AS_PATH attribute with specified AS numbers. Without the replace keyword, using this command adds the specified AS numbers before the original AS_PATH attribute.

Examples

# Create routing policy policy1 with node 10, matching mode as permit. If BGP routing information matches AS-path-ACL 1, add AS number 200 before the original AS_PATH attribute.

<Sysname> system-view

[Sysname] route-policy policy1 permit node 10

[Sysname-route-policy] if-match as-path 1

[Sysname-route-policy] apply as-path 200

6.1.2 apply comm-list delete

Syntax

apply comm-list comm-list-number delete

undo apply comm-list

View

Routing policy view

Parameters

comm-list-number: Community list number. The basic community list number ranges from 1 to 99. The advanced community list number ranges from 100 to 199.

Description

Use the apply comm-list delete command to remove community attributes in BGP routing information specified by the community list.

Use the undo apply comm-list command to remove the clause configuration.

No community attributes are removed by default.

Examples

# Create routing policy policy1 with node 10, matching mode as permit. If BGP routing information matches AS-path-ACL 1, remove community attributes specified in community list 1.

<Sysname> system-view

[Sysname] route-policy policy1 permit node 10

[Sysname-route-policy] if-match as-path 1

[Sysname-route-policy] apply comm-list 1 delete

6.1.3 apply community

Syntax

apply community { none | additive | { community-number&<1-16> | aa:nn&<1-16> | internet | no-export-subconfed | no-export | no-advertise } * [ additive ] }

undo apply community

View

Routing policy view

Parameters

none: Removes community attributes of BGP routes.

community-number: Community sequence number, in the range 1 to 4294967295.

aa:nn: Community number; both aa and nn are in the range 0 to 65535.

&<1-16>: Indicates the argument before it can be entered up to 16 times.

internet: Sets the internet community attribute for matched BGP routes. Routes with this attribute are advertised to all BGP peers.

no-export-subconfed: Sets the no-export-subconfed community attribute for matched BGP routes. Routes with this attribute are not advertised out the sub autonomous system.

no-advertise: Sets the no-advertise community attribute for matched BGP routes. Routes with this attribute are not advertised to any peers.

no-export: Sets the no-export community attribute for matched BGP routes. Routes with this attribute are not advertised out the autonomous system or confederation, but can be advertised to other sub ASs in the confederation.

additive: Adds the specified community attribute to the original community attribute of a matched BGP route.

Description

Use the apply community command to set the specified community attribute for BGP routes.

Use the undo apply community command to remove the apply clause.

No community attribute is set by default.

Related commands: ip community-list, if-match community, route-policy.

Examples

# Create routing policy setcommunity with node 16 and matching mode as permit. Set the no-export community attribute for BGP routes passing AS-path-ACL 8.

<Sysname> system-view

[Sysname] route-policy setcommunity permit node 16

[Sysname-route-policy] if-match as-path 8

[Sysname-route-policy] apply community no-export

6.1.4 apply cost

Syntax

apply cost [ + | - ] value

undo apply cost

View

Routing policy view

Parameters

+: Increases cost value.

+: Decreases cost value.

cost: Specifies a cost from 0 to 4294967295.

Description

Use the apply cost command to set a cost for routing information.

Use the undo apply cost command to remove the clause configuration.

No cost is set for routing information by default.

Related commands: if-match interface, if-match acl, if-match ip-prefix, if-match ip next-hop, if-match cost, if-match tag, route-policy, apply ip-address next-hop, apply local-preference, apply origin, apply tag.

Examples

# Create routing policy policy1 with node 10, matching mode as permit. If a route matches the outbound interface VLAN-interface 10, set the cost for the route to 120.

<Sysname> system-view

[Sysname] route-policy policy1 permit node 10

[Sysname-route-policy] if-match interface vlan-interface 10

[Sysname-route-policy] apply cost 120

6.1.5 apply cost-type

Syntax

apply cost-type { external | internal | type-1 | type-2 }

undo apply cost-type

View

Routing policy view

Parameters

external: IS-IS external route.

internal: IS-IS internal route.

type-1: Type-1 external route of OSPF.

type-2: Type-2 external route of OSPF.

Description

Use the apply cost-type command to set a cost type for routing information.

Use the undo apply cost-type command to remove the clause configuration.

No cost type is set for routing information by default.

Examples

# Create routing policy policy1 with node 10, matching mode as permit. If a route matches tag 8, set the cost type for the route to IS-IS internal route.

<Sysname> system-view

[Sysname] route-policy policy1 permit node 10

[Sysname-route-policy] if-match tag 8

[Sysname-route-policy] apply cost-type internal

6.1.6 apply extcommunity

Syntax

apply extcommunity { rt route-target }&<1-16> [ additive ]

undo apply extcommunity

View

Routing policy view

Parameters

rt route-target: Sets the route target extended community attribute, which is a string of 3 to 21 characters. route-target has two forms:

16-bit AS number: 32-bit self-defined number, for example, 101:3;

32-bit IP address: 16-bit self-defined number, for example, 192.168.122.15:1.

&<1-16>: Indicates the argument before it can be entered up to 16 times.

additive: Adds to the original community attribute of a route..

Description

Use the apply extcommunity command to apply the specified extended community attribute to BGP routes.

Use the undo apply extcommunity command to remove the clause configuration.

No extended community attribute is set for routing information by default.

Examples

# Create routing policy policy1 with node 10, matching mode as permit. If a BGP route matches AS-path-ACL 1, add the RT extended community attribute 100:2 to the route.

<Sysname> system-view

[Sysname] route-policy policy1 permit node 10

[Sysname-route-policy] if-match as-path 1

[Sysname-route-policy] apply extcommunity rt 100:2 additive

6.1.7 apply isis

Syntax

apply isis { level-1 | level-1-2 | level-2 }

undo apply isis

View

Routing policy view

Parameters

level-1: Redistributes routes into IS-IS level-1 area.

level-2: Redistributes routes into IS-IS level-2 area.

level-1-2: Redistributes routes into both IS-IS level-1 and level-2 areas.

Description

Use the apply isis command to redistribute routes into a specified ISIS level.

Use the undo apply isis command to remove the clause configuration.

No level is set by default.

Examples

# Create routing policy policy1 with node 10, matching mode as permit. If a route matches tag 8, redistribute the route to IS-IS level-2 area.

<Sysname> system-view

[Sysname] route-policy policy1 permit node 10

[Sysname-route-policy] if-match tag 8

[Sysname-route-policy] apply isis level-2

6.1.8 apply local-preference

Syntax

apply local-preference preference

undo apply local-preference

View

Routing policy view

Parameters

preference: BGP local preference, in the range 0 to 4294967295.

Description

Use the apply local-preference command to apply the specified local preference to BGP routes.

Use the undo apply local-preference command to remove the clause configuration.

No local preference is set for BGP routing information by default.

Related commands: route-policy.

Examples

# Create routing policy policy1 with node 10, matching mode as permit. If a route matches AS-path-ACL 1, set the local preference for the route to 130.

<Sysname> system-view

[Sysname] route-policy policy1 permit node 10

[Sysname-route-policy] if-match as-path 1

[Sysname-route-policy] apply local-preference 130

6.1.9 apply origin

Syntax

apply origin { igp | egp as-number | incomplete }

undo apply origin

View

Routing policy view

Parameters

igp: Sets the origin of BGP routing information to IGP.

egp: Sets the origin of BGP routing information to EGP.

as-number: Autonomous system number for EGP routes, in the range of 1 to 65535.

incomplete: Sets the origin of BGP routing information to unknown.

Description

Use the apply origin command to apply the specified origin attribute to BGP routes.

Use the undo apply origin command to remove the clause configuration.

No origin attribute is set for routing information by default.

Examples

# Create routing policy policy1 with node 10, matching mode as permit. If a route matches AS-path-ACL 1, set the origin for the route to IGP.

<Sysname> system-view

[Sysname] route-policy policy1 permit node 10

[Sysname-route-policy] if-match as-path 1

[Sysname-route-policy] apply origin igp

6.1.10 apply preference

Syntax

apply preference preference

undo apply preference

View

Routing policy view

Parameters

preference: Routing preference, in the range of 1 to 255.

Description

Use the apply preference command to set a preference for a routing protocol.

Use the undo apply preference command to remove the clause configuration.

No preference is set for a routing protocol by default.

If you set preferences for routing protocols with the preference command, using the apply preference command will set a new preference for a matched routing protocol. Other routing protocols not satisfying criteria still use the preferences set by the preference command.

Examples

# Create routing policy policy1 with node 10, matching mode as permit. If a route matches OSPF external route type, set the preference for the routing protocol to 90.

<Sysname> system-view

[Sysname] route-policy policy1 permit node 10

[Sysname-route-policy] if-match route-type external-type1or2

[Sysname-route-policy] apply preference 90

6.1.11 apply preferred-value

Syntax

apply preferred-value preferred-value

undo apply preferred-value

View

Routing policy view

Parameters

preferred-value: Preferred value, in the range of 0 to 65535.

Description

Use the apply preferred-value command to apply a preferred value to BGP routes.

Use the undo apply preferred-value command to remove the clause configuration.

No preferred value is set for BGP routes by default.

Examples

# Create routing policy policy1 with node 10, matching mode as permit. If a BGP route matches AS-path-ACL 1, set the preferred value 66 for the BGP route.

<Sysname> system-view

[Sysname] route-policy policy1 permit node 10

[Sysname-route-policy] if-match as-path 1

[Sysname-route-policy] apply preferred-value 66

6.1.12 apply tag

Syntax

apply tag value

undo apply tag

View

Routing policy view

Parameters

value: Tag value, in the range 0 to 4294967295.

Description

Use the apply tag command to set a specified tag value for RIP, OSPF or IS-IS routing information.

Use the undo apply tag command to remove the clause configuration.

No routing tag is set for RIP, OSPF or IS-IS routing information by default.

Examples

# Create routing policy policy1 with node 10, matching mode as permit. If a route matches OSPF external route type 1, set the tag of the route to 100.

<Sysname> system-view

[Sysname] route-policy policy1 permit node 10

[Sysname-route-policy] if-match route-type external-type1

[Sysname-route-policy] apply tag 100

6.1.13 display ip as-path

Syntax

display ip as-path [ as-path-number ]

View

Any view

Parameters

as-path-number: AS path ACL number, in the range of 1 to 256.

Description

Use the display ip as-path command to display BGP AS path ACL information.

Information about all BGP AS path lists will be displayed if no as-path-number is specified.

Related commands: ip as-path, if-match as-path, apply as-path.

Examples

# Display the information of BGP AS path list 1.

<Sysname> display ip as-path 1

ListID Mode Expression

1 permit 2

Table 6-1 Description on the fields of the display ip as-path command

Field	Description
ListID	AS path ACL ID
Mode	Matching mode: permit, deny
Expression	Regular expression for matching

6.1.14 display ip community-list

Syntax

display ip community-list [ basic-community-list-number | adv-community-list-number ]

View

Any view

Parameters

basic-community-list-number: Basic community list number, in the range of 1 to 99.

adv-community-list-number: Advanced community list number, in the range of 100 to 199.

Description

Use the display ip community-list command to display BGP community list information.

All BGP community list information will be displayed if no basic-community-list-number or adv-community-list-number is specified.

Related commands: ip community-list, if-match community, apply community.

Examples

# Display the information of the BGP community list 1.

<Sysname> display ip community-list 1

Community List Number 1

permit 1:1 1:2 2:2

6.1.15 display ip extcommunity-list

Syntax

display ip extcommunity-list [ ext-comm-list-number ]

View

Any view

Parameters

ext-comm-list-number: Extended community list number, in the range of 1 to 199.

Description

Use the display ip extcommunity-list command to display BGP extended community list information.

All BGP extended community list information will be displayed if no ext-comm-list-number is specified.

Related commands: ip extcommunity-list, if-match extcommunity, apply extcommunity.

Examples

# Display the information of BGP extended community list 1.

<Sysname> display ip extcommunity-list 1

Extended Community List Number 1

permit rt : 9:6

6.1.16 display route-policy

Syntax

display route-policy [ route-policy-name ]

View

Any view

Parameters

route-policy-name: Routing policy name, a string of 1 to 19 characters.

Description

Use the display route-policy command to display routing policy information.

All routing policy information will be displayed if no route-policy-name is specified.

Related commands: route-policy.

Examples

# Display the information of routing policy 1.

<Sysname> display route-policy policy1

Route-policy : policy1

permit : 10

if-match ip-prefix abc

apply cost 120

Table 6-2 Description on the fields of the display route-policy command.

Field	Description
Route-policy	Routing policy name
Permit	permit mode: permit, deny
if-match ip-prefix abc	Match criterion
apply cost 120	If the match criterion is satisfied, set the route cost to 120.

6.1.17 if-match as-path

Syntax

if-match as-path as-path-number&<1-16>

undo if-match as-path [ as-path-number&<1-16> ]

View

Routing policy view

Parameters

as-path-number: AS path list number, in the range of 1 to 256.

&<1-16>: Indicates the argument before it can be entered up to 16 times.

Description

Use the if-match as-path command to specify AS path list (s) for matching against the AS path attribute of BGP routing information.

Use the undo if-match as-path command to remove the match criterion.

The match criterion is not configured by default.

This command is one of the if-match clauses of a route policy, used for filtering BGP routing information and specifying match criteria according to the AS path attribute of routing information.

Related commands: route-policy, ip as-path-acl.

Examples

# Define as-path list 2, allowing routing information containing AS 200 or 300 to pass. Define routing policy test with node 10, and set an if-match clause using the as-path list for matching.

<Sysname> system-view

[Sysname] ip as-path 2 permit _*200.*300

[Sysname] route-policy test permit node 10

[Sysname-route-policy] if-match as-path 2

6.1.18 if-match community

Syntax

if-match community { basic-community-list-number [ whole-match ] | adv-community-list-number }&<1-16>

undo if-match community [ basic-community-list-number | adv-community-list-number ]&<1-16>

View

Routing policy view

Parameters

basic-community-list-number: Basic community list number, in the range of 1 to 99.

adv-community-list-number: Advanced community list number, in the range of 100 to 199.

whole-match: Specifies the exact match. All and only the specified communities must be present.

&<1-16>: Indicates the argument before it can be entered up to 16 times.

Description

Use the if-match community command to specify community list(s) for matching against the community attribute of BGP routing information.

Use the undo if-match community command to remove the match criterion.

The match criterion is not configured by default.

This command is one of the if-match clauses of route policy, used for filtering BGP routing information and specifying match criterion according to the community attribute of BGP routing information.

Related commands: route-policy, ip community-list.

Examples

# Define community-list 1, allowing routing information with community number 100 or 200 to pass. Then define a routing policy named test, whose node 10 is defined with an if-match clause to reference the community-list for matching.

<Sysname> system-view

[Sysname] ip community-list 1 permit 100 200

[Sysname] route-policy test permit node 10

[Sysname-route-policy] if-match community 1

6.1.19 if-match cost

Syntax

if-match cost value

undo if-match cost

View

Routing policy view

Parameters

cost: Specifies the cost to match, ranging from 0 to 4294967295.

Description

Use the if-match cost command to specify a cost for matching against the cost of a route.

Use the undo if-match cost command to remove the match criterion.

The match criterion is not configured by default.

This command is one of the if-match clauses of routing policy, used for matching routes with the specified route cost.

Related commands: if-match interface, if-match acl, if-match ip-prefix, if-match ip next-hop, if-match tag, route-policy, apply ip-address next-hop, apply cost, apply local-preference, apply origin, apply tag.

Examples

# Create routing policy policy1 with node 10, matching mode as permit. Define an if-match clause to permit routing information with a cost of 8.

<Sysname> system-view

[Sysname] route-policy policy1 permit node 10

[Sysname-route-policy] if-match cost 8

6.1.20 if-match extcommunity

Syntax

if-match extcommunity ext-comm-list-number&<1-16>

undo if-match extcommunity [ ext-comm-list-number&<1-16> ]

View

Routing policy view

Parameters

ext-comm-list-number: Extended community list number, in the range of 1 to 199.

&<1-16>: Indicates the argument before it can be entered up to 16 times.

Description

Use the if-match extcommunity command to specify extended community list(s) for matching against the extended community attribute of routing information.

Use the undo if-match extcommunity command to remove the match criterion.

The match criterion is not configured by default.

Examples

# Create a routing policy named policy1 with node 10, matching mode as permit. Match the extended community attribute of routes against extended community lists 100 and 150.

<Sysname> system-view

[Sysname] route-policy policy1 permit node 10

[Sysname-route-policy] if-match extcommunity 100 150

6.1.21 if-match interface

Syntax

if-match interface { interface-type interface-number }&<1-16>

undo if-match interface [ interface-type interface-number ]&<1-16>

View

Routing policy view

Parameters

interface-type: Interface type

interface-number: Interface number

&<1-16>: Indicates the argument before it can be entered up to 16 times.

Description

Use the if-match interface command to specify interface(s) for matching against the outbound interfaces of routing information.

Use the undo if-match interface command to remove the match criterion.

The match criterion is not configured by default.

Related commands: if-match acl, if-match ip-prefix, if-match ip next-hop, if-match cost, if-match tag, route-policy, apply ip-address next-hop, apply cost, apply local-preference, apply origin, apply tag.

Examples

# Create a routing policy named policy1 with node 10, matching mode as permit. Define an if-match clause to permit the routing information with the outbound interface as VLAN-interface 1.

<Sysname> system-view

[Sysname] route-policy policy1 permit node 10

[Sysname-route-policy] if-match interface vlan-interface 1

6.1.22 if-match route-type

Syntax

if-match route-type { internal | external-type1 | external-type2 | external-type1or2 | is-is-level-1 | is-is-level-2 | nssa-external-type1 | nssa-external-type2 | nssa-external-type1or2 } *

View

Routing policy view

Parameters

internal: Internal routes (OSPF intra-area and inter-area routes).

external-type1: OSPF Type 1 external routes.

external-type2: OSPF Type 2 external routes.

external-type1or2: OSPF Type 1 or 2 external routes.

is-is-level-1: IS-IS Level-1 routes.

is-is-level-2: IS-IS Level-2 routes.

nssa-external-type1: OSPF NSSA Type 1 external routes.

nssa-external-type2: OSPF NSSA Type 2 external routes.

nssa-external-type1or2: OSPF NSSA Type 1 or 2 external routes.

Description

Use the if-match route-type command to configure a route type match criterion.

Use the undo if-match route-type command to remove the match criterion.

The match criterion is not configured by default.

Examples

# Create a routing policy named policy1 with node 10, matching mode as permit. Define an if-match clause to match internal routes.

<Sysname> system-view

[Sysname] route-policy policy1 permit node 10

[Sysname-route-policy] if-match route-type internal

6.1.23 if-match tag

Syntax

if-match tag value

undo if-match tag

View

Routing policy view

Parameters

value: Specifies a tag value, ranging from 0 to 4294967295.

Description

Use the if-match tag command to match routing information having the specified tag.

Use the undo if-match tag command to remove the match criterion.

The match criterion is not configured by default.

Related commands: if-match interface, if-match acl, if-match ip-prefix, if-match ip next-hop, if-match cost, route-policy, apply ip-address next-hop, apply cost, apply local-preference, apply origin, apply tag.

Examples

# Create a routing policy named policy1 with node 10, matching mode as permit. Define an if-match clause to permit RIP, OSPF and IS-IS routing information with the tag as 8.

<Sysname> system-view

[Sysname] route-policy policy1 permit node 10

[Sysname-route-policy] if-match tag 8

6.1.24 ip as-path

Syntax

ip as-path as-path-number { deny | permit } regular-expression

undo ip as-path as-path-number

View

System view

Parameters

as-path-number: AS path ACL number, in the range of 1 to 256.

deny: Specifies the matching mode for the AS path ACL as deny.

permit: Specifies the matching mode for the AS path ACL as permit.

regular-expression: Regular expression of AS path, a string of 1 to 50 characters.

BGP routing information contains the AS path attribute field that identifies the autonomous systems through which routing information has passed. Used to compare with the AS path attribute, a regular expression is a formula comprised of characters, for example, ^200. *100$, which matches AS path attribute fields that start with AS200 and end with AS100.

Table 6-3 Meanings of special characters used in regular expressions

Character	Meaning
.	Matches any single character, including blank space.
*	Matches 0 or more patterns.
+	Matches 1 or more patterns.
^	Matches the beginning of an input string.
$	Matches the end of an input string.
_	Matches a comma, left brace, right brace, left parenthesis, right parenthesis, the beginning of an input string, the end of an input string, or a space.
[ range ]	Means the range of single-character patterns.
-	Separates the ending points of a range.

Description

Use the ip as-path command to create an AS path ACL.

Use the undo ip as-path command to remove an AS path ACL.

No AS path ACL is created by default.

Examples

# Create an AS path ACL numbered 1, permitting routing information whose AS_PATH starts with 10.

<Sysname> system-view

[Sysname] ip as-path-acl 1 permit ^10

6.1.25 ip community-list

Syntax

ip community-list basic-comm-list-num { deny | permit } [ community-number-list ] [ internet | no-advertise | no-export | no-export-subconfed ] *

undo ip community-list basic-comm-list-num [ community-number-list ] [ internet | no-advertise | no-export | no-export-subconfed ] *

ip community-list adv-comm-list-num { deny | permit } regular-expression

undo ip community-list adv-comm-list-num [ regular-expression ]

View

System view

Parameters

basic-comm-list-num: Basic community list number, in the range 1 to 99.

adv-comm-list-num: Advanced community list number, in the range 100 to 199.

regular-expression: Regular expression of advanced community attribute, a string of 1 to 50 characters.

deny: Specifies the matching mode of the community list as deny.

permit: Specifies the matching mode of the community list as permit.

community-number-list: Community number list, in the community number or aa:nn format, with community number in the range 1 to 4294967295 and aa and nn in the range 0 to 65535. Each format can be entered up to 16 times.

internet: Routes with this attribute can be advertised to all the BGP peers. By default, all routes have this attribute.

no-advertise: Routes with this attribute will not be advertised to other BGP peers.

no-export: Routes with this attribute will not be advertised out the local AS, or the confederation but can be advertised to other ASs in the confederation.

no-export-subconfed: Routes with this attribute can not be advertised out the local AS, or to other sub ASs in the confederation.

Description

Use the ip community-list to define a community list entry.

Use the undo ip community-list command to remove a community list or entry.

No community list is defined by default.

Examples

# Define basic community list 1 to permit routing information with the internet community attribute.

<Sysname> system-view

[Sysname] ip community-list 1 permit internet

# Define advanced community list 100 to permit routing information with the community attribute starting with 10.

<Sysname> system-view

[Sysname] ip community-list 100 permit ^10

6.1.26 ip extcommunity-list

Syntax

ip extcommunity-list ext-comm-list-number { deny | permit } { rt route-target }&<1-16>

undo ip extcommunity-list ext-comm-list-number

View

System view

Parameters

ext-comm-list-number: Extended community list number, in the range 1 to 199.

permit: Specifies the matching mode for the extended community list as permit.

deny: Specifies the matching mode for the extended community list as deny.

rt route-target: Specifies route target extended community attribute, which is a string of 3 to 21 characters. route-target has two forms:

A 16-bit AS number: a 32-bit self-defined number, for example, 101:3;

A 32-bit IP address: a 16-bit self-defined number, for example, 192.168.122.15:1.

&<1-16>: Indicates the argument before it can be entered up to 16 times.

Description

Use the ip extcommunity-list to define an extended community list entry.

Use the undo ip extcommunity-list command to remove an extended community list.

No extended community list is defined by default.

Examples

# Define extended community list 1 to permit routing information with RT 200:200.

<Sysname> system-view

[Sysname] ip extcommunity-list 1 permit rt 200:200

6.1.27 route-policy

Syntax

route-policy route-policy-name { permit | deny } node node-number

undo route-policy route-policy-name [ node node-number ]

View

System view

Parameters

route-policy-name: Routing policy name, a string of 1 to 19 characters.

permit: Specifies the matching mode of the routing policy node as permit. If a route satisfies all the if-match clauses of the node, it passes through the filtering of the node and then is executed with the apply clauses of the node. If not, it goes to the next node of the routing policy.

deny: Specifies the matching mode of the routing policy node as deny. If a route satisfies all the if-match clauses of the node, it does not pass the filtering of the node and will not go to the next node.

node node-number: Node number, in the range 0 to 65535. The node with a smaller node-number will be tested first when the routing policy is used for filtering routing information.

Description

Use the route-policy command to create a routing policy and enter its view.

Use the undo route-policy command to remove a routing policy.

No routing policy is created by default.

A routing policy is used for routing information filtering or policy routing. It contains several nodes and each node comprises some if-match and apply clauses. The if-match clauses define the matching criteria of the node and the apply clauses define the actions performed after a packet passes the filtering of the node. The relation among the if-match clauses of a node is logic AND, namely all the if-match clauses must be satisfied. The filter relation among different route-policy nodes is logic OR, namely a packet passing a node passes the routing policy.

Related commands: if-match interface, if-match acl, if-match ip-prefix, if-match ip next-hop, if-match cost, if-match tag, apply ip-address next-hop, apply local-preference, apply cost, apply origin, apply tag.

Examples

# Create routing policy 1 with node 10 and matching mode as permit, and then enter routing policy view.

<Sysname> system-view

[Sysname] route-policy policy1 permit node 10

[Sysname-route-policy]

6.2 IPv4 Routing Policy Configuration Commands

6.2.1 apply ip-address next-hop

Syntax

apply ip-address next-hop ip-address

undo apply ip-address next-hop

View

Routing policy view

Parameters

ip-address: IP address of the next hop.

Description

Use the apply ip-address next-hop command to set a next hop for IPv4 routing information.

Use the undo apply ip-address next-hop command to remove the clause configuration.

No next hop address is set for IPv4 routing information by default.

It is invalid to use the apply ip-address next-hop command to set a next hop when redistributing routes.

Related commands: if-match interface, if-match acl, if-match ip-prefix, if-match ip next-hop, if-match cost, if-match tag, route-policy, apply local-preference, apply cost, apply origin, apply tag.

Examples

# Create routing policy policy1 with node 10, matching mode permit. If passing AS path ACL 1, a route‘s next hop is set to 193.1.1.8.

<Sysname> system-view

[Sysname] route-policy policy1 permit node 10

[Sysname-route-policy] if-match as-path 1

[Sysname-route-policy] apply ip-address next-hop 193.1.1.8

6.2.2 display ip ip-prefix

Syntax

display ip ip-prefix [ ip-prefix-name ]

View

Any view

Parameters

ip-prefix-name: IP prefix list name, a string of 1 to 19 characters.

Description

Use the display ip ip-prefix command to display the statistics of an IPv4 prefix list. If no ip-prefix-name is specified, statistics for all IPv4 prefix lists will be displayed.

Related commands: ip ip-prefix.

Examples

# Display the statistics of IPv4 prefix list abc.

<Sysname> display ip ip-prefix abc

Prefix-list abc

Permitted 0

Denied 0

index: 10 permit 1.0.0.0/11 ge 22 le 32

Table 6-4 Description on the fields of the display ip ip-prefix command.

Field	Description
Prefix-list	Name of the IPv4 prefix list
Permitted	Number of routes satisfying the match criterion
Denied	Number of routes not satisfying the match criterion
index	Internal serial number of the IPv4 prefix list
permit	Matching mode: permit or deny
1.0.0.0/11	Match IP address and mask
ge	greater-equal, the lower limit mask
le	less-equal, the upper limit mask

6.2.3 if-match acl

Syntax

if-match acl acl-number

undo if-match acl

View

Routing policy view

Parameters

acl-number: ACL number from 2000 to 3999.

Description

Use the if-match acl command to configure an ACL match criterion.

Use the undo if-match acl command to remove the match criterion.

No ACL match criterion is configured by default.

Related commands: if-match interface, if-match ip next-hop, if-match cost, if-match tag, route-policy, apply ip-address next-hop, apply cost, apply local-preference, apply origin, apply tag.

Examples

# Create routing policy policy1 with node 10, matching mode as permit. Define an if-match clause to permit routes matching ACL 2000.

<Sysname> system-view

[Sysname] route-policy policy1 permit node 10

[Sysname-route-policy] if-match acl 2000

6.2.4 if-match ip

Syntax

if-match ip { next-hop | route-source } { acl acl-number | ip-prefix ip-prefix-name }

undo if-match ip { next-hop | route-source } [ acl | ip-prefix ]

View

Routing policy view

Parameters

next-hop: Matches next hop.

route-source: Matches source address.

acl acl-number: Matches an ACL with a number from 2000 to 2999.

ip-prefix ip-prefix-name: Matches an IP prefix list with a name being a string of 1 to 19 characters.

Description

Use the if-match ip command to configure a next hop or source address match criterion for IPv4 routes.

Use the undo if-match ip command to remove the match criterion.

The match criterion is not configured by default.

Related commands: route-policy.

Examples

# Create routing policy policy1 with node 10, matching mode permit. Define an if-match clause to permit routing information whose next hop address matches IP prefix list p1.

<Sysname> system-view

[Sysname] route-policy policy1 permit node 10

[Sysname-route-policy] if-match ip next-hop ip-prefix p1

6.2.5 if-match ip-prefix

Syntax

if-match ip-prefix ip-prefix-name

undo if-match ip-prefix

View

Routing policy view

Parameters

ip-prefix-name: Matches an IP prefix list with a name being a string of 1 to 19 characters.

Description

Use the if-match ip-prefix command to configure an IP prefix list based match criterion.

Use the undo if-match ip-prefix command to remove the match criterion.

No IP prefix list based match criterion is configured by default.

Examples

# Create routing policy policy1 with node 10, matching mode as permit. Define an if-match clause to permit a route whose destination address matches IP prefix list p1.

<Sysname> system-view

[Sysname] route-policy policy1 permit node 10

[Sysname-route-policy] if-match ip-prefix p1

6.2.6 ip ip-prefix

Syntax

ip ip-prefix ip-prefix-name [ index index-number ] { permit | deny } ip-address mask-length [ greater-equal min-mask-length ] [ less-equal max-mask-length ]

undo ip ip-prefix ip-prefix-name [ index index-number ]

View

System view

Parameters

ip-prefix-name: IPv4 prefix list name, a string of 1 to 19 characters.

index-number: Index number, in the range 1 to 65535, for uniquely specifying an item of the IPv4 prefix list. The index with a smaller number is tested first.

permit: Specifies the matching mode for the IPv4 prefix list as permit, that is, when a route to be filtered is in the range of the IPv4 prefix list, the route passes the IPv4 prefix list without needing to enter the next item for testing. If the route to be filtered is not in the prefix range, it will enter the next item test.

deny: Specifies the matching mode for the IPv4 prefix list as deny, that is, when a route to be filtered is in the IPv4 prefix list range, the route neither passes the filter nor enters the next node for testing. If not in the range, the route will enter the next item test.

ip-address mask-length: Specifies an IPv4 address prefix and mask length. The mask-length is in the range 0 to 32.

min-mask-length, max-mask-length: Specifies the range for prefix if the IPv4 address and prefix length are matched. greater-equal means “greater than or equal to” and less-equal means “less than or equal to”. The range relation is mask-length <= min-mask-length <= max-mask-length <= 32. If only min-mask-length is specified, the prefix length range is [ min-mask-length, 32 ]. If only max-mask-length is specified, the prefix length range is [mask-length, max-mask-length ]. If both min-mask-length and max-mask-length are specified, the prefix length range is [ min-mask-length, max-mask-length ].

Description

Use the ip ip-prefix command to configure an IPv4 prefix list item.

Use the undo ip ip-prefix command to remove an IPv4 prefix list or an item.

No IPv4 prefix list is configured by default.

An IPv4 prefix list is used to filter IPv4 addresses. It may have multiple items, each of which specifies a range of IPv4 prefix. The filtering relation among items is logic OR, namely, passing any item means the IPv4 prefix list is passed. If no item is passed, the IP prefix list cannot be passed.

The IP prefix range is determined by mask-length and [ min-mask-length, max-mask-length ]. If both mask-length and [ min-mask-length, max-mask-length ] are specified, then the IP address to be filtered must satisfy both of them.

If ip-address mask-length is specified as 0.0.0.0 0, then only the default route is matched.

With the keyword and argument combination ip-address mask-length less-equal specified as 0.0.0.0 less-equal 32, the command matches all the routes.

Examples

# Create a routing policy named policy1 with node 10, matching mode as permit. Define an IP prefix list named p1 to permit only the routes in the network segment 10.0.192.0/8 and with mask length 17 or 18.

<Sysname> system-view

[Sysname] ip ip-prefix p1 permit 10.0.192.0 8 greater-equal 17 less-equal 18

6.2.7 reset ip ip-prefix

Syntax

reset ip ip-prefix [ ip-prefix-name ]

View

User view

Parameters

ip-prefix-name: IP prefix list name, a string of 1 to 19 characters.

Description

Use the reset ip ip-prefix command to clear the statistics of a specified IPv4 prefix list. If no ip-prefix-name is specified, the statistics of all the IPv4 prefix lists will be cleared.

Examples

# Clear the statistics of IPv4 prefix list abc.

<Sysname> reset ip ip-prefix abc

H3C S5500-EI Series Switches Command Manual-Release 2102(V1.01)

1.1.3 ip route-static default-preference

2.1.2 default cost

2.1.11 import-route

2.1.16 reset rip statistics

2.1.19 rip input

2.1.20 rip metricin

2.1.21 rip metricout

2.1.22 rip output

2.1.26 rip version

2.1.28 summary

3.1.5 bandwidth-reference

3.1.6 default

3.1.40 maximum-routes

3.1.60 reset ospf redistribution

4.1.1 area-authentication-mode

4.1.18 domain-authentication-mode

4.1.19 filter-policy export

4.1.20 filter-policy import

4.1.26 import-route isis level-2 into level-1

4.1.27 isis

4.1.28 isis authentication-mode

4.1.29 isis circuit-level

4.1.31 isis cost

4.1.34 isis enable

4.1.39 isis timer hello

4.1.40 isis timer holding-multiplier