advertise | not-advertise: Advertises the summary route or not. If none of the advertise and not-advertise keywords is set, the summary route is advertised.

cost cost: Specifies the cost of the summary route, in the range of 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 into 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 into 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

area (OSPF view)

Syntax

area area-id

undo area area-id

View

OSPF view

Default level

2: System level

Parameters

area-id: ID of an area, a decimal integer in the range of 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]

asbr-summary

Syntax

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

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

View

OSPF view

Default level

2: System level

Parameters

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

mask: Summary route mask, in dotted decimal notation.

mask-length: Length of summary route mask, in the range of 0 to 32 bits.

cost cost: Specifies the cost of the summary route, in the range of 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.

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 routing policy to control summary route advertisement, in the range of 0 to 4294967295. The default is 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 into 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 into 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 into a single route, specifying a tag value of 2 and a cost of 100 for the summary 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

authentication-mode

Syntax

For MD5/HMAC-MD5 authentication:

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

undo authentication-mode

For simple authentication mode:

authentication-mode simple [ [ cipher | plain ] password ]

undo authentication-mode

View

OSPF area view

Default level

2: System level

Parameters

hmac-md5: Specifies the HMAC-MD5 authentication mode.

md5: Specifies the MD5 ciphertext authentication mode.

simple: Specifies the simple authentication mode.

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

cipher | plain: Specifies the password type. If you specify the plain password type, the password can be entered and displayed only in plain text. If you specify the cipher password type, the password can be entered in plain text or cipher text, and displayed only in cipher text. The default password type is cipher for the MD5 or HMAC-MD5 authentication mode, and plain for the simple authentication mode.

password: Specifies the password, a string of letters or digits. For the simple authentication mode, the plain type password contains 1 to 8 characters, and the cipher type password contains 1 to 8 characters as the plain-text password or 24 characters as the ciphertext password. For the MD5/HMAC-MD5 authentication mode, the plain type password contains 1 to 16 characters, and the cipher type password contains 1 to 16 characters as the plain-text password or 24 characters as the ciphertext password.

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.

Related commands: ospf authentication-mode.

NOTE:

If you configure interface authentication and area authentication at the same time, OSPF receives only the packets that pass interface authentication.

Examples

# Configure OSPF area 0 to use the MD5 ciphertext authentication mode, and set the key ID to 15, and authentication password to abc.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] area 0

[Sysname-ospf-100-area-0.0.0.0] authentication-mode md5 15 cipher abc

# Configure OSPF area 0 to use simple authentication mode, and set authentication password to abc, and password type to cipher.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] area 0

[Sysname-ospf-100-area-0.0.0.0] authentication-mode simple cipher abc

bandwidth-reference (OSPF view)

Syntax

bandwidth-reference value

undo bandwidth-reference

View

OSPF view

Default level

2: System level

Parameters

value: Bandwidth reference value for link cost calculation, in the range of 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

default

Syntax

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

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

View

OSPF view

Default level

2: System level

Parameters

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

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

tag: Specifies the default tag for redistributed routes, in the range of 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

default-cost (OSPF area view)

Syntax

default-cost cost

undo default-cost

View

OSPF area view

Default level

2: System level

Parameters

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

Description

Use the default-cost command to configure 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 and 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

default-route-advertise (OSPF view)

Syntax

undo default-route-advertise

View

OSPF view

Default level

2: System level

Parameters

always: Generates a default route in a Type-5 LSA into the OSPF routing domain regardless of whether there is a default route in the routing table. If this keyword is not specified, the router generates a default route in a Type-5 LSA into the OSPF routing domain only when an active default route that does not belong to the current OSPF process exists in the IP routing table.

permit-calculate-other: Calculates default routes from other routers with this keyword specified or does not calculate default routes from other routers without this keyword specified when the router generates a default route in a Type-5 LSA into the OSPF routing domain. If the router generates no default route in a Type-5 LSA into the OSPF routing domain, the router calculates default routes from other routers regardless of whether this keyword is specified.

cost cost: Specifies a cost for the default route, in the range of 0 to 16777214. If no cost is specified, the default cost specified by the default cost command applies..

route-policy route-policy-name: Specifies a routing policy name, a string of 1 to 63 case-sensitive characters. When a default route exists in the routing table and the specified routing policy is matched, the command distributes a default route in a Type-5 LSA into the OSPF routing domain, and the routing policy modifies some values in the Type-5 LSA. If the always keyword is specified at the same time, the command can distribute a default route in a Type-5 LSA into the OSPF routing domain when the specified routing policy is matched, regardless of whether a default route exists in the routing table, and the routing policy modifies some values in the Type-5 LSA.

type type: Specifies a type for the Type-5 LSA: 1 or 2. If type is not specified, the default type for the Type-5 LSA specified by the default type command applies.

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.

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.

NOTE:

Using the import-route command cannot redistribute a default route. To redistribute a default route, use the default-route-advertise command.

Related commands: import-route and default.

Examples

# Generate a default route in an ASE LSA into the OSPF routing domain, regardless of whether the default route is available in the routing table.

<Sysname> system-view

[Sysname] ospf 100

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

description (OSPF/OSPF area view)

Syntax

description description

undo description

View

OSPF view/OSPF area view

Default level

2: System level

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

display ospf abr-asbr

Syntax

display ospf [ process-id ] abr-asbr [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

process-id: OSPF process ID, in the range of 1 to 65535. Use this argument to display information about the routes to the ABR/ASBR under the specified OSPF process.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

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

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

Examples

# Display information about the routes to the OSPF ABR and ASBR.

<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 1 Output description

Field	Description
Type	Type of the route to the ABR or ASBR: · Intra—Intra-area route · Inter—Inter-area route
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

display ospf asbr-summary

Syntax

display ospf [ process-id ] asbr-summary [ ip-address { mask | mask-length } ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

process-id: OSPF process ID, in the range of 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 of 0 to 32 bits.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

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 2 2 1

30.1.1.0 255.255.255.0 OSPF 2 2 1

Table 2 Output description

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

display ospf brief

Syntax

display ospf [ process-id ] brief [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

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

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

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 Router Type: 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

Transmit pacing: Interval: 20 Count: 3

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

Route Preference: 10

ASE Route Preference: 150

SPF Computation Count: 22

RFC 1583 Compatible

Area Count: 1 Nssa Area Count: 1

7/5 translator state: Disabled

7/5 translate stability timer interval: 0

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-interface11)

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 Output description

Field	Description
OSPF Process 1 with Router ID 192.168.1.2	OSPF process ID and OSPF router ID.
RouterID	Router ID.
Router Type	Router type: · ABR · ASBR · NSSA · Null
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. MPLS Traffic-Engineering means MPLS TE is supported.
SPF-schedule-interval	Interval for SPF calculations.
LSA generation interval	LSA generation interval.
LSA arrival interval	LSA arrival interval.
Transmit pacing	LSU packet transmit rate of the interface: · Interval—The LSU transmit interval of the interface. · Count—The maximum number of LSU packets sent during each 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.
Area Count	Area number of the current process.
Nssa Area Count	NSSA area number of the current process.
7/5 translator state	State of the translator that translates Type-7 LSAs to Type-5 LSAs. The value can be one of the following: · Enabled—Indicates the translator is specified through commands. · Elected—Indicates the translator is designated through election. · Disabled—Indicates the switch is not a translator.
7/5 translate stability timer interval	Stability interval for Type-7 LSA-to-Type-5 LSA translation
ExChange/Loading Neighbors	Neighbors in ExChange/Loading state
Area	Area ID in the IP address format
Authtype	Authentication type of the area: · None—Non-authentication · Simple—Simple authentication · MD5—MD5 authentication
Area flag	The type of the area
SPF scheduled Count	SPF calculation count in the OSPF area
Interface	Interface in the area
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

display ospf cumulative

Syntax

display ospf [ process-id ] cumulative [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

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

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

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 4 Output description

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	Number of Type-1 LSAs originated
Network	Number of Type-2 LSAs originated
Sum-Net	Number of Type-3 LSAs originated
Sum-Asbr	Number of Type-4 LSAs originated
External	Number of Type-5 LSAs originated
NSSA	Number of Type-7 LSAs originated
Opq-Link	Number of Type-9 LSAs originated
Opq-Area	Number of Type-10 LSAs originated
Opq-As	Number of Type-11 LSAs originated
LSA originated	Number of LSAs originated
LSA Received	Number of LSAs received
Routing Table	Routing table information
Intra Area	Intra-area route number
Inter Area	Inter-area route number
ASE	ASE route number

display ospf error

Syntax

display ospf [ process-id ] error [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

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

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

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: 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 5 Output description

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: Neighbor unknown	Hello packets received from unknown 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

display ospf interface

Syntax

display ospf [ process-id ] interface [ interface-type interface-number | all ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

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

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

all: Displays the OSPF information of all interfaces.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

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 6 Output description

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—Means the interface does not send or receive protocol traffic · Waiting—Means the interface starts sending and receiving Hello packets and the router is trying to determine the identity of the (Backup) designated router for the network · p-2-p—Means the interface will send Hello packets at the interval of HelloInterval, and try to establish an adjacency with the neighbor · DR—Means the router itself is the designated router on the attached network · BDR—Means the router itself is the backup designated router on the attached network · DROther—Means the interface is on a network on which another router has been selected as the designated router
Cost	Interface cost
Pri	Router priority
DR	The DR on the interface’s network segment
BDR	The BDR on the interface’s network segment

display ospf lsdb

Syntax

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

View

Any view

Default level

1: Monitor level

Parameters

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

brief: Displays brief LSDB information.

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

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

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

nssa: Displays Type-7 LSA (NSSA External 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.

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

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

summary: Displays Type-3 LSA (Network Summary 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.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

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 7 Output description

Field	Description
Area	LSDB information of the 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

Checksum : 0x8d1b

Net Mask : 255.255.255.0

Attached Router 192.168.1.1

Attached Router 192.168.2.1

Area: 0.0.0.1

Link State Database

Type : Network

LS ID : 192.168.1.2

Adv Rtr : 192.168.1.2

LS Age : 782

Len : 32

Options : NP

Seq# : 80000003

Checksum : 0x2a77

Net Mask : 255.255.255.0

Attached Router 192.168.1.1

Attached Router 192.168.1.2

Table 8 Output description

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: · O—Opaque LSA advertisement capability · E—AS External LSA reception capability · EA—External extended LSA reception capability · DC—On-demand link support · N—NSSA external LSA support · P—Capability of an NSSA ABR to translate Type-7 LSAs into Type-5 LSAs
Seq#	LSA sequence number
Checksum	LSA checksum
Net Mask	Network mask
Attached Router	ID of the router that established adjacency with the DR, and ID of the DR itself

display ospf nexthop

Syntax

display ospf [ process-id ] nexthop [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

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

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

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-interface11

192.168.0.2 1 192.168.0.1 Vlan-interface12

192.168.1.1 1 192.168.1.1 Vlan-interface12

Table 9 Output description

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

display ospf peer

Syntax

display ospf [ process-id ] peer [ verbose ] [ interface-type interface-number ] [ neighbor-id ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

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

verbose: Displays detailed neighbor information.

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

neighbor-id: Neighbor router ID.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

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

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

· If the verbose keyword is specified, detailed information about neighbors of the specified OSPF process or 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 1.1.1.1

Neighbors

Area 0.0.0.0 interface 1.1.1.1(Vlan-interface11)'s neighbors

Router ID: 1.1.1.2 Address: 1.1.1.2 GR State: Normal

State: Full Mode: Nbr is Master Priority: 1

DR: 1.1.1.2 BDR: 1.1.1.1 MTU: 0

Dead timer due in 33 sec

Neighbor is up for 02:03:35

Authentication Sequence: [ 0 ]

Neighbor state change count: 6

Table 10 Output description

Field	Description
Area areaID interface IPAddress(InterfaceName)'s neighbors	Neighbor information of the interface in the specified area: · areaID—Area to which the neighbor belongs. · IPAddress—Interface IP address · InterfaceName—Interface name
Router ID	Neighbor router ID.
Address	Neighbor router address.
GR State	GR state.
State	Neighbor state: · Down—This is the initial state of a neighbor conversation. · Init—In this state, the router has seen a Hello packet from the neighbor. However, the router has not established bidirectional communication with the neighbor (the router itself did not appear in the neighbor's hello packet). · Attempt—Available only in an NBMA network, 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. · 2-Way—In this state, communication between the two routers is bidirectional. The router itself appears in the neighbor's Hello packet. · Exstart—The goal of this state is to decide which router is the master, and to decide upon the initial Database Description (DD) sequence number. · Exchange—In this state, the router is sending DD packets to the neighbor, describing its entire link-state database. · Loading—In this state, the router sends Link State Request packets to the neighbor, requesting more recent LSAs. · Full—In this state, the neighboring routers are fully adjacent.
Mode	Neighbor mode for LSDB synchronization: · Nbr is Master—Means the neighboring router is the master. · Nbr is Slave—Means the neighboring router is the slave.
Priority	Neighboring 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 33 sec	Dead timer times out in 33 seconds.
Neighbor is up for 02:03:35	The neighbor has been up for 02:03:35.
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 1.1.1.1

Neighbor Brief Information

Area: 0.0.0.0

Router ID Address Pri Dead-Time Interface State

1.1.1.2 1.1.1.2 1 40 Vlan11 Full/DR

Table 11 Output description

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

display ospf peer statistics

Syntax

display ospf [ process-id ] peer statistics [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

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

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

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 10.3.1.1

Neighbor Statistics

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

0.0.0.0 0 0 0 0 0 0 0 1 1

0.0.0.2 0 0 0 0 0 0 0 1 1

Total 0 0 0 0 0 0 0 2 2

Table 12 Output description

Field	Description
Area ID	The state statistics of all the routers in the area to which the router belongs is displayed
Down	Number of neighboring routers in Down state in the same area
Attempt	Number of neighboring routers in Attempt state in the same area
Init	Number of neighboring routers in Init state in the same area
2-Way	Number of neighboring routers in 2-Way state in the same area
ExStart	Number of neighboring routers in ExStart state in the same area
Exchange	Number of neighboring routers in Exchange state in the same area
Loading	Number of neighboring routers in Loading state in the same area
Full	Number of neighboring routers in Full state in the same area
Total	Total number of neighbors in the same state, namely, Down, Attempt, Init, 2-Way, ExStart, Exchange, Loading, or Full

display ospf request-queue

Syntax

display ospf [ process-id ] request-queue [ interface-type interface-number ] [ neighbor-id ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

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

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

neighbor-id: Neighbor’s router ID.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

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

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 13 Output description

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

display ospf retrans-queue

Syntax

display ospf [ process-id ] retrans-queue [ interface-type interface-number ] [ neighbor-id ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

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

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

neighbor-id: Neighbor’s router ID.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

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

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 14 Output description

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
Retrans List	Retransmission list
Type	LSA type
LinkState ID	Link state ID
AdvRouter	Advertising router
Sequence	LSA sequence number
Age	LSA age

display ospf routing

Syntax

display ospf [ process-id ] routing [ interface interface-type interface-number ] [ nexthop nexthop-address ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

process-id: OSPF process ID, in the range of 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.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

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 15 Output description

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

display ospf vlink

Syntax

display ospf [ process-id ] vlink [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

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

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

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-interface11)

Cost: 1562 State: P-2-P Type: Virtual

Transit Area: 0.0.0.1

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

Table 16 Output description

Field	Description
Virtual-link Neighbor-ID	ID of the neighbor connected to the router via the virtual link
Neighbor-State	Neighbor State—Down, 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

display router id

Syntax

display router id [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

Use the display router id command to display the global router ID.

Examples

# Display the global router ID.

<Sysname> display router id

Configured router ID is 1.1.1.1

enable link-local-signaling

Syntax

enable link-local-signaling

undo enable link-local-signaling

View

OSPF view

Default level

2: System level

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

enable log

Syntax

enable log [ config | error | state ]

undo enable log [ config | error | state ]

View

OSPF view

Default level

2: System level

Parameters

config: Enables configuration logging.

error: Enables error logging.

state: Enables state logging.

Description

Use the enable log command to enable specified OSPF logging.

Use the undo enable log 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

enable out-of-band-resynchronization

Syntax

enable out-of-band-resynchronization

undo enable out-of-band-resynchronization

View

OSPF view

Default level

2: System level

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.

Before configuring this command, you must enable the link-local signaling capability.

Related commands: enable link-local-signaling.

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

fast-reroute

Syntax

fast-reroute { auto [ abr-only ] | route-policy route-policy-name }

undo fast-reroute

View

OSPF view

Default level

2: System level

Parameters

auto: Calculates a backup next hop automatically for all routes.

abr-only: Selects only the route to the ABR as the backup path.

route-policy route-policy-name: References a routing policy to designate a backup next hop. The route-policy-name argument is a string of 1 to 63 case-sensitive characters.

Description

Use the fast-reroute command to configure OSPF fast reroute (FRR).

Use the undo fast-reroute command to restore the default.

By default, OSPF FRR is not configured.

NOTE:

· Do not use OSPF FRR and BFD (for OSPF) at the same time; otherwise, OSPF FRR may fail to take effect.

· Do not use the fast-reroute auto command with the following commands: vlink-peer and sham-link, enable traffic-adjustment, and enable traffic-adjustment advertise in MPLS Command Reference.

Examples

# Enable FRR to automatically calculate a backup next hop for all routes in OSPF process 100.

<Sysname> system-view

[Sysname] bfd echo-source-ip 1.1.1.1

[Sysname] ospf 100

[Sysname-ospf-100] fast-reroute auto

# Enable FRR to designate a backup next hop by using routing policy frr for OSPF process 100.

<Sysname> system-view

[Sysname] bfd echo-source-ip 1.1.1.1

[Sysname] ip ip-prefix abc index 10 permit 100.1.1.0 24

[Sysname] route-policy frr permit node 10

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

[Sysname-route-policy] apply fast-reroute backup-interface Vlan-interface 1000 backup-nexthop 193.1.1.8

[Sysname-route-policy] quit

[Sysname] ospf 100

[Sysname-ospf-100] fast-reroute route-policy frr

filter

Syntax

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

undo filter { export | import }

View

OSPF area view

Default level

2: System level

Parameters

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

ip-prefix-name: IP prefix list name, a string of up to 19 characters. For more information about IP prefix lists, see Layer 3—IP Routing Configuration Guide.

export: Filters Type-3 LSAs advertised to other areas.

import: Filters Type-3 LSAs advertised into the area.

Description

Use the filter command to configure incoming/outgoing Type-3 LSAs filtering on an ABR.

Use the undo filter command to disable Type-3 LSA filtering.

By default, Type-3 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

filter-policy export (OSPF view)

Syntax

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

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

View

OSPF view

Default level

2: System level

Parameters

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

ip-prefix-name: Name of an IP prefix list used to filter 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, ospf, isis or bgp. If no protocol is specified, all redistributed routes are filtered.

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

Description

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

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

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

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

If you want to reference an advanced ACL (with a number from 3000 to 3999) in the command, the ACL should be configured with the rule [ rule-id ] { deny | permit } ip source sour-addr sour-wildcard command to deny/permit a route with the specified destination, or with the rule [ rule-id ] { deny | permit } ip source sour-addr sour-wildcard destination dest-addr dest-wildcard command to deny/permit a route with the specified destination and mask. The source keyword specifies the destination address of a route while the destination keyword specifies the subnet mask of the route (the subnet mask must be valid; otherwise, the configuration is ineffective).

Related commands: import-route.

Examples

# Filter redistributed routes using ACL2000.

<Sysname> system-view

[Sysname] acl number 2000

[Sysname-acl-basic-2000] rule deny ip source 192.168.10.0 0.0.0.255

[Sysname-acl-basic-2000] quit

[Sysname] ospf 100

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

# Configure ACL 3000 to permit only route 113.0.0.0/16 to pass, and reference ACL 3000 to filter redistributed routes.

<Sysname> system-view

[Sysname] acl number 3000

[Sysname-acl-adv-3000] rule 10 permit ip source 113.0.0.0 0 destination 255.255.0.0 0

[Sysname-acl-adv-3000] rule 100 deny ip

[Sysname-acl-adv-3000] quit

[Sysname] ospf 100

[Sysname-ospf-100] filter-policy 3000 export

filter-policy import (OSPF view)

Syntax

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

undo filter-policy import

View

OSPF view

Default level

2: System level

Parameters

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

gateway ip-prefix-name: Name of an IP address prefix list used to filter routes based on the next hop of the routing information, a string of up to 19 characters. For more information about IP prefix lists, see Layer 3—IP Routing Configuration Guide.

ip-prefix ip-prefix-name: Name of an IP address prefix list used to filter incoming routes based on destination IP address. It is a string of up to 19 characters. For more information about IP prefix lists, see Layer 3—IP Routing Configuration Guide.

route-policy route-policy-name: Name of a routing policy used to filter incoming routes based on routing policy, a string of up to 63 case-sensitive characters. For more information about routing policy, see Layer 3—IP Routing Configuration Guide.

Description

Use the filter-policy import command to configure the filtering of routes calculated from received LSAs.

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

If you want to reference an advanced ACL (with a number from 3000 to 3999) in the command or in the routing policy, the ACL should be configured with the rule [ rule-id ] { deny | permit } ip source sour-addr sour-wildcard command to deny/permit a route with the specified destination, or with the rule [ rule-id ] { deny | permit } ip source sour-addr sour-wildcard destination dest-addr dest-wildcard command to deny/permit a route with the specified destination and mask. The source keyword specifies the destination address of a route while the destination keyword specifies the subnet mask of the route (the subnet mask must be valid; otherwise, the configuration is ineffective).

By default, the filtering is not configured.

Examples

# Filter incoming routes using ACL2000.

<Sysname> system-view

[Sysname] acl number 2000

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

[Sysname-acl-basic-2000] quit

[Sysname] ospf 100

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

# Configure ACL 3000 to permit only route 113.0.0.0/16 to pass, and reference ACL 3000 to filter incoming routes.

<Sysname> system-view

[Sysname] acl number 3000

[Sysname-acl-adv-3000] rule 10 permit ip source 113.0.0.0 0 destination 255.255.0.0 0

[Sysname-acl-adv-3000] rule 100 deny ip

[Sysname-acl-adv-3000] quit

[Sysname] ospf 100

[Sysname-ospf-100] filter-policy 3000 import

graceful-restart (OSPF view)

Syntax

graceful-restart [ ietf | nonstandard ]

undo graceful-restart

View

OSPF view

Default level

2: System level

Parameters

ietf: Enables the IETF GR capability.

nonstandard: Enables the non-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:

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

· 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.

· 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, and opaque-capability enable.

NOTE:

Do not configure OSPF NSR on a device that acts as a GR restarter. The graceful-restart command and the ospf non-stop-routing command are mutually exclusive and cannot be configured on a switch at the same time.

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

graceful-restart help

Syntax

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

undo graceful-restart help

View

OSPF view

Default level

2: System level

Parameters

acl-number: Basic or advanced ACL number, in the range of 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

# Enable IETF standard GR for OSPF process 1 and configure the router as a GR Helper for OSPF neighbors defined in the ACL 2001.

<Sysname> system-view

[Sysname] ospf 1

[Sysname-ospf-1] opaque-capability enable

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

# Enable non IETF standard GR for OSPF process 1 and configure the router as a GR Helper for OSPF neighbors defined in the ACL 2001.

<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 help 2001

graceful-restart interval (OSPF view)

Syntax

graceful-restart interval interval-value

undo graceful-restart interval

View

OSPF view

Default level

2: System level

Parameters

interval-value: Specifies the Graceful Restart interval, in the range of 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.

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

host-advertise

Syntax

host-advertise ip-address cost

undo host-advertise ip-address

View

OSPF area view

Default level

2: System level

Parameters

ip-address: IP address of a host

cost: Cost of the route, in the range of 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 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

import-route (OSPF view)

Syntax

undo import-route protocol [ process-id | all-processes ]

View

OSPF view

Default level

2: System level

Parameters

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

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

all-processes: Redistributes routes from all the processes of the specified routing protocol. This keyword takes effect 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 of 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, which is in the range of 0 to 4294967295 and defaults to 1.

route-policy route-policy-name: Specifies a routing policy to redistribute qualified routes only. A routing policy name is a string of up to 63 case-sensitive 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:

· Intra-area route

· Inter-area route

· Type1 External route

· 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 has high reliability and its 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 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:

· The import-route command cannot redistribute default routes.

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

· Only active routes can be redistributed. You can use the display ip routing-table protocol command to display route state information.

· The undo import-route protocol all-processes command removes only the configuration made by the import-route protocol all-processes command, instead of the configuration made by the import-route protocol process-id command.

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

ispf enable

Syntax

ispf enable

undo ispf enable

View

OSPF view

Default level

2: System level

Parameters

None

Description

Use the ispf enable command to enable OSPF ISPF.

Use the undo ispf enable command to disable OSPF ISPF.

By default, OSPF ISPF is disabled.

When a network topology is changed, ISPF allows the system to recomputes only the affected part of the shortest path tree (SPT), instead of the entire SPT.

Examples

# Enable OSPF ISPF.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] ispf enable

log-peer-change

Syntax

log-peer-change

undo log-peer-change

View

OSPF view

Default level

2: System level

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.

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

lsa-arrival-interval

Syntax

lsa-arrival-interval interval

undo lsa-arrival-interval

View

OSPF view

Default level

2: System level

Parameters

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

Description

Use the lsa-arrival-interval command to specify the LSA 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 arrival interval to 200 milliseconds.

<Sysname> system-view

[Sysname] ospf 100

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

lsa-generation-interval

Syntax

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

undo lsa-generation-interval

View

OSPF view

Default level

2: System level

Parameters

maximum-interval: Maximum LSA generation interval in seconds, in the range of 1 to 60. The default is 5.

initial-interval: Minimum LSA generation interval in milliseconds, in the range of 10 to 60000. The default is 0, that is, no limit to the minimum LSA generation interval.

incremental-interval: LSA generation incremental interval in milliseconds, in the range of 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.

By default, the maximum LSA generation interval is 5 seconds, the minimum interval is 0 milliseconds, and the incremental interval is 5000 milliseconds.

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

lsdb-overflow-limit

Syntax

lsdb-overflow-limit number

undo lsdb-overflow-limit

View

OSPF view

Default level

2: System level

Parameters

number: Specifies the upper limit of external LSAs in the LSDB, in the range of 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 restore the default.

External LSAs in the LSDB are not limited 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

maximum load-balancing (OSPF view)

Syntax

maximum load-balancing maximum

undo maximum load-balancing

View

OSPF view

Default level

2: System level

Parameters

maximum: Maximum number of equal cost routes for load balancing, in the range of 1 to 16. 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.

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

By default, the maximum number of equal cost routes for load balancing is 16.

Examples

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

<Sysname> system-view

[Sysname] ospf 100

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

network (OSPF area view)

Syntax

network ip-address wildcard-mask

undo network ip-address wildcard-mask

View

OSPF area view

Default level

2: System level

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 for the interface attached to the specified network in the area.

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

nssa

Syntax

nssa [ default-route-advertise | no-import-route | no-summary | translate-always | translator-stability-interval value ] *

undo nssa

View

OSPF area view

Default level

2: System level

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 Type-7 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 a totally NSSA area.

translate-always: Specifies the NSSA ABR as a translator to translate Type-7 LSAs to Type-5 LSAs.

translator-stability-interval value: Specifies the stability interval of the translator, that is, the interval during which the translator can maintain its translating capability after a switch with a higher priority becomes a new translator. The value argument is the stability interval in seconds, which is in the range of 0 to 900 and defaults to 0 (that is, the translator does not maintain its translating capability if a new translator arises).

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

opaque-capability enable

Syntax

opaque-capability enable

undo opaque-capability

View

OSPF view

Default level

2: System level

Parameters

None

Description

Use the opaque-capability enable command to enable opaque LSA advertisement and reception. With the command configured, the OSPF switch 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

ospf

Syntax

ospf [ process-id | router-id router-id | vpn-instance vpn-instance-name ] *

undo ospf [ process-id ]

View

System view

Default level

2: System level

Parameters

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

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

vpn-instance vpn-instance-name: Specifies an MPLS L3VPN that the OSPF process belongs to. vpn-instance-name is a case-sensitive string of 1 to 31 characters.

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.

You can enable multiple OSPF processes on a router and specify different Router IDs for these processes.

Enabling OSPF first is required before performing other tasks.

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]

ospf authentication-mode

Syntax

For MD5/HMAC-MD5 authentication:

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

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

For simple authentication:

ospf authentication-mode simple [ cipher | plain ] password

undo ospf authentication-mode simple

View

Interface view

Default level

2: System level

Parameters

hmac-md5: HMAC-MD5 authentication.

md5: MD5 authentication.

simple: Simple authentication.

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

cipher | plain: 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.

Related commands: authentication-mode.

Examples

# Configure VLAN-interface 10 to support MD5 cipher authentication, and set the key ID to 15, and authentication password to abc.

<Sysname> system-view

[Sysname] interface vlan-interface 10

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

# Configure VLAN-interface 10 to support simple authentication, and set for the interface the authentication password to abc, and password type to cipher.

<Sysname> system-view

[Sysname] interface vlan-interface 10

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

ospf bfd enable

Syntax

ospf bfd enable [ echo ]

undo ospf bfd enable

View

Interface view

Default level

2: System level

Parameters

echo: Configures BFD echo packet single-hop detection. If this keyword is not specified, BFD control packet bidirectional detection is enabled.

Description

Use the ospf bfd enable command to enable BFD for link failure detection on an OSPF interface.

Use the undo ospf bfd enable command to disable BFD on an OSPF interface.

By default, an OSPF interface is not enabled with BFD.

Examples

# Enable OSPF and BFD on VLAN-interface 11.

<Sysname> system-view

[Sysname] ospf

[Sysname-ospf-1] area 0

[Sysname-ospf-1-area-0.0.0.0] network 192.168.0.0 0.0.255.255

[Sysname] interface vlan-interface 11

[Sysname-Vlan-interface11] ospf bfd enable

ospf cost

Syntax

ospf cost value

undo ospf cost

View

Interface view

Default level

2: System level

Parameters

value: OSPF cost, in the range of 0 to 65535 for a loopback interface and 1 to 65535 for other interfaces.

Description

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

Use the undo ospf cost command to restore the default.

The default cost depends on the interface type: 1 for a VLAN interface; 0 for a loopback interface; computed according to the bandwidth for other interfaces with the formula: Interface OSPF cost = Bandwidth reference value (100 Mbps) ÷ Interface bandwidth (Mbps).

If the calculated cost is greater than 65535, the value of 65535 is used; if the calculated cost is smaller than 1, the value of 1 is used.

Examples

# Set the OSPF cost for the interface to 65.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] ospf cost 65

ospf dr-priority

Syntax

ospf dr-priority priority

undo ospf dr-priority

View

Interface view

Default level

2: System level

Parameters

priority: DR Priority of the interface, in the range of 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. If a switch has a priority of 0, it will not be elected as a DR or BDR.

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

ospf mib-binding

Syntax

ospf mib-binding process-id

undo ospf mib-binding

View

System view

Default level

2: System level

Parameters

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

Description

Use the ospf mib-binding command to bind an OSPF process to MIB operation for responding to SNMP requests.

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

By default, MIB operation is bound to the OSPF process with the smallest process ID.

Examples

# Bind OSPF process 100 to MIB operation.

<Sysname> system-view

[Sysname] ospf mib-binding 100

# Restore the default, that is, bind the OSPF process with the smallest process ID to MIB operation.

<Sysname> system-view

[Sysname] undo ospf mib-binding

ospf mtu-enable

Syntax

ospf mtu-enable

undo ospf mtu-enable

View

Interface view

Default level

2: System level

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.

After a virtual link is established via a Virtual-Template or Tunnel, two switches on the link from different vendors may have different MTU values. To make them consistent, set the attached interfaces’ default MTU to 0.

After this command is configured, upon receiving a DD packet, the interface checks whether the MTU in the packet is greater than its own MTU; if yes, the interface discards the packet.

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

ospf network-type

Syntax

ospf network-type { broadcast | nbma | p2mp [ unicast ] | p2p [ peer-address-check ] }

undo ospf network-type

View

Interface view

Default level

2: System level

Parameters

broadcast: Specifies the network type as Broadcast.

nbma: Specifies the network type as NBMA.

p2mp: Specifies the network type as P2MP.

unicast: Specifies the P2MP interface to unicast OSPF packets. By default, a P2MP interface multicasts OSPF packets.

p2p: Specifies the network type as P2P.

peer-address-check: Checks whether the peer address is on the same subnet when the network type of the OSPF interface is 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.

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

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.

When the network type of an interface is NBMA or P2MP unicast, you need to use the peer command to specify a neighbor.

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

When the network type of an interface is P2MP unicast, all OSPF packets are sent out the interface through unicast.

Related commands: ospf dr-priority.

Examples

# Configure the interface’s network type as NBMA.

<Sysname> system-view

[Sysname] interface vlan-interface 10

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

ospf non-stop-routing

Syntax

ospf non-stop-routing

undo ospf non-stop-routing

View

System view

Default level

2: System level

Parameters

None

Description

Use the ospf non-stop-routing command to enable OSPF NSR.

Use the undo ospf non-stop-routing command to disable OSPF NSR.

By default, OSPF NSR is disabled.

NOTE:

A device enabled with OSPF NSR cannot act as a GR Restarter. The opaque-capability enable or graceful-restart command and the ospf non-stop-routing command are mutually exclusive and cannot be configured on a switch at the same time.

Examples

# Enable OSPF NSR.

<Sysname> system-view

[Sysname] ospf non-stop-routing

ospf packet-process prioritized-treatment

Syntax

ospf packet-process prioritized-treatment

undo ospf packet-process prioritized-treatment

View

System view

Default level

2: System level

Parameters

None

Description

Use the ospf packet-process prioritized-treatment command to enable OSPF to give priority to receiving and processing Hello packets.

Use the undo ospf packet-process prioritized-treatment command to restore the default.

By default, this function is not enabled.

Examples

# Enable OSPF to give priority to receiving and processing Hello packets.

<Sysname> system-view

[Sysname] ospf packet-process prioritized-treatment

ospf timer dead

Syntax

ospf timer dead seconds

undo ospf timer dead

View

Interface view

Default level

2: System level

Parameters

seconds: Dead interval in seconds, in the range of 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.

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

ospf timer hello

Syntax

ospf timer hello seconds

undo ospf timer hello

View

Interface view

Default level

2: System level

Parameters

seconds: Hello interval in seconds, in the range of 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.

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

ospf timer poll

Syntax

ospf timer poll seconds

undo ospf timer poll

View

Interface view

Default level

2: System level

Parameters

seconds: Poll interval in seconds, in the range of 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.

NOTE:

The poll interval must be at least four times the hello interval.

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

ospf timer retransmit

Syntax

ospf timer retransmit interval

undo ospf timer retransmit

View

Interface view

Default level

2: System level

Parameters

interval: LSA retransmission interval in seconds, in the range of 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.

Examples

# Set the LSA retransmission interval to 8 seconds.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] ospf timer retransmit 8

ospf trans-delay

Syntax

ospf trans-delay seconds

undo ospf trans-delay

View

Interface view

Default level

2: System level

Parameters

seconds: LSA transmission delay in seconds, in the range of 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 LSA transmission delay defaults to 1 second.

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.

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

peer

Syntax

peer ip-address [ cost value | dr-priority dr-priority ]

undo peer ip-address

View

OSPF view

Default level

2: System level

Parameters

ip-address: Neighbor IP address.

cost value: Specifies the cost to reach the neighbor, in the range of 1 to 65535.

dr-priority dr-priority: Specifies the DR priority of the neighbor, which is in the range of 0 to 255, and defaults to 1.

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.

The cost set with the peer command is the cost to the specified neighbor on the P2MP link. If no cost is specified, the cost to the neighbor equals the local interface’s cost.

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

preference

Syntax

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

undo preference [ ase ]

View

OSPF view

Default level

2: System level

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 route-policy-name: Applies a routing policy to set priorities for specified routes. A route-policy-name is a string of 1 to 63 case-sensitive characters.

value: Priority value, in the range of 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 matching 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 200 for OSPF external routes.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] preference ase 200

reset ospf counters

Syntax

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

View

User view

Default level

1: Monitor level

Parameters

process-id: Clears the statistics of the specified OSPF process, which is in the range of 1 to 65535.

neighbor: Clears neighbor statistics.

interface-type interface-number: Clears the statistics of the neighbor connected to the specified interface.

router-id: Clears the statistics of the specified neighbor.

Description

Use the reset ospf counters command to clear OSPF statistics.

Examples

# Clear OSPF statistics.

<Sysname> reset ospf counters

reset ospf process

Syntax

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

View

User view

Default level

2: System level

Parameters

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

graceful-restart: Reset the OSPF process using GR.

Description

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

The reset ospf process command can do the following:

· Clear all invalid LSAs without waiting for their timeouts

· Make a newly configured Router ID take effect

· Start a new round of DR/BDR election

· 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

Warning : Reset OSPF process? [Y/N]:Y

# Reset all OSPF processes using GR.

<Sysname> reset ospf process graceful-restart

Warning : Reset OSPF process? [Y/N]:Y

reset ospf redistribution

Syntax

reset ospf [ process-id ] redistribution

View

User view

Default level

2: System level

Parameters

process-id: OSPF process ID, in the range of 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

rfc1583 compatible

Syntax

rfc1583 compatible

undo rfc1583 compatible

View

OSPF view

Default level

2: System level

Parameters

None

Description

Use the rfc1583 compatible command to enable compatibility with RFC 1583.

Use the undo rfc1583 compatible command to disable the function.

By default, compatibility with RFC1583 is enabled.

RFC 1583 and RFC 2328 use different rules for selecting the best route among multiple AS external routes destined for the same network. Using this command can make them compatible. If RFC 2328 is compatible with RFC 1583, the intra-area route in the backbone area is preferred, if not, the intra-area route in the non-backbone area is preferred to reduce the burden of the backbone area.

Examples

# Disable compatibility with RFC 1583.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] undo rfc1583 compatible

router id

Syntax

router id router-id

undo router id

View

System view

Default level

2: System level

Parameters

router-id: Router ID, in the form of a dotted decimal IPv4 address.

Description

Use the router id command to configure a global router ID.

Use the undo router id command to remove the global router ID.

By default, no global router ID is configured.

Some routing protocols use a router ID to identify a device. You can configure a global router ID, which is used by routing protocols that have no router ID configured.

If no global router ID is configured, the highest loopback interface IP address, if any, is used as the router ID. If no loopback interface IP address is available, the highest physical interface IP address is used, regardless of the interface status.

NOTE:

· During an active/standby switchover, the standby main board checks whether the previous router ID that is backed up before switchover is valid. If not, it selects a new router ID.

· If the interface whose IP address is the router ID is removed or modified, a new router ID is selected. Other events, (the interface goes down; after a physical interface address is selected as the router ID, an IP address is configured for a loopback interface; a higher interface IP address is configured) will not trigger a router ID re-selection.

· After a router ID is changed, you need to use the reset ospf process command to make it effective.

Examples

# Configure a global router ID.

<Sysname> system-view

[Sysname] router id 1.1.1.1

silent-interface (OSPF view)

Syntax

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

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

View

OSPF view

Default level

2: System level

Parameters

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

all: Disables all interfaces from sending OSPF packets.

Description

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

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

By default, an interface receives and sends OSPF packets.

A disabled interface is a passive interface, which cannot receive or 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 receiving and sending OSPF packets.

Examples

# Disable an interface from receiving and sending OSPF packets.

<Sysname> system-view

[Sysname] ospf 100

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

snmp-agent trap enable ospf

Syntax

View

System view

Default level

3: Manage level

Parameters

process-id: OSPF process ID, in the range of 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.

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.

See Network Management and Monitoring Command Reference for related information.

Examples

# Enable the sending of SNMP traps for OSPF process 1.

<Sysname> system-view

[Sysname] snmp-agent trap enable ospf 1

spf-schedule-interval

Syntax

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

undo spf-schedule-interval

View

OSPF view

Default level

2: System level

Parameters

maximum-interval: Maximum OSPF route calculation interval in seconds, in the range of 1 to 60.

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

incremental-interval: Incremental value in milliseconds, in the range of 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

stub (OSPF area view)

Syntax

stub [ no-summary | default-route-advertise-always ] *

undo stub

View

OSPF area view

Default level

2: System level

Parameters

no-summary: Usable only on a stub ABR. With this keyword, the ABR advertises only a default route in a Type-3 LSA into the stub area (such a stub area is known as a totally stub area).

default-route-advertise-always: Usable only on a stub ABR. With this keyword, the ABR advertises a default route in a Type-3 LSA into the stub area regardless of whether FULL-state neighbors exist in the backbone area. Without this keyword, the ABR advertises a default route in a Summary LSA into the stub area only when at least one FULL-state neighbor exists in the backbone 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.

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

To configure an area as a stub area, all routers attached to it must be configured with this command.

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

stub-router

Syntax

stub-router

undo stub-router

View

OSPF view

Default level

2: System level

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

transmit-pacing

Syntax

transmit-pacing interval interval count count

undo transmit-pacing

View

OSPF view

Default level

2: System level

Parameters

interval: Interval at which an interface sends LSU packets, in milliseconds. Its value is in the range of 10 to 1000. If the router has a number of OSPF interfaces, you are recommended to increase this interval to reduce the total numbers of LSU packets sent by the router every second.

count: Maximum number of LSU packets sent by an interface at each interval. It is in the range of 1 to 200. If the router has a number of OSPF interfaces, you are recommended to decrease this interval to reduce the total numbers of LSU packets sent by the router every second.

Description

Use the transmit-pacing command to configure the maximum number of LSU packets that can be sent every the specified interval.

Use the undo transmit-pacing command to restore the default.

By default, an OSPF interface sends up to three LSU packets every 20 milliseconds.

Examples

# Configure all the interfaces under OSPF process 1 to send up to 10 LSU packets every 30 milliseconds.

<Sysname> system-view

[Sysname] ospf 1

[Sysname-ospf-1] transmit-pacing interval 30 count 10

vlink-peer (OSPF area view)

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

Default level

2: System level

Parameters

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

hello seconds: Hello interval in seconds, in the range of 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 of 1 to 3600, which defaults to 5.

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

dead seconds: Dead interval in seconds, in the range of 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 of 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:

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

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

· 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 and display ospf vlink.

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

07-Layer 3 - IP Routing Command Reference

abr-summary (OSPF area view)

area (OSPF view)

bandwidth-reference (OSPF view)

default

default-cost (OSPF area view)

default-route-advertise (OSPF view)

description (OSPF/OSPF area view)

filter-policy export (OSPF view)

filter-policy import (OSPF view)

graceful-restart (OSPF view)

import-route (OSPF view)

maximum load-balancing (OSPF view)

network (OSPF area view)

reset ospf redistribution

silent-interface (OSPF view)

stub (OSPF area view)

vlink-peer (OSPF area view)

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