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.

Usage guidelines

This command is available only on an ABR to summarize multiple contiguous networks into one network.

To enable ABR to advertise more-specific routes, issue the undo abr-summary command.

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)

Use area to create an area and enter area view.

Use undo area to remove an area.

Syntax

area area-id

undo area area-id

Default

No OSPF area is created.

Views

OSPF view

Predefined user roles

network-admin

mdc-admin

Parameters

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

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

Use asbr-summary to configure a summary route on an ASBR.

Use undo asbr-summary to remove a summary route on an ASBR.

Syntax

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

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

Default

No route summarization is configured on an ASBR.

Views

OSPF view

Predefined user roles

network-admin

mdc-admin

Parameters

ip-address: Specifies the destination IP address of the summary route.

mask: Specifies the mask in dotted decimal notation.

mask-length: Specifies the mask length 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. Without this keyword, the command advertises the route.

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

Usage guidelines

With the asbr-summary command configured, an ASBR summarizes redistributed routes that fall into the specified address range into a single route and advertises the summary route in a Type-5 LSA to neighbors. If the ASBR resides in an NSSA area, it advertises the summary route in a Type-7 LSA.

With the asbr-summary command configured, an NSSA ABR summarizes matching routes described by Type-5 LSAs that are translated from Type-7 LSAs, and advertises the summary route to neighbors. This command does not take effect on non NSSA ABRs.

To enable ASBR to advertise more-specific routes, issue the undo asbr-summary command.

Examples

# Summarize redistributed static routes into a single route, and specify 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

Related commands

display ospf asbr-summary

authentication-mode

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

Use undo authentication-mode to restore the default.

Syntax

authentication-mode { md5 | simple }

undo authentication-mode

Default

No authentication mode is configured for an area.

Views

OSPF area view

Predefined user roles

network-admin

mdc-admin

Parameters

md5: Specifies the MD5 authentication mode.

simple: Specifies the simple authentication mode.

Usage guidelines

Routers that reside in the same area must have the same authentication mode: no authentication, simple, or MD5.

Examples

# Configure OSPF Area 0 to use the MD5 authentication mode.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] area 0

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

Related commands

ospf authentication-mode

bandwidth-reference (OSPF view)

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

Use undo bandwidth-reference to restore the default value.

Syntax

bandwidth-reference value

undo bandwidth-reference

Default

The default value is 100 Mbps.

Views

OSPF view

Predefined user roles

network-admin

mdc-admin

Parameters

value: Specifies the bandwidth reference value for link cost calculation, in the range of 1 to 4294967 Mbps.

Usage guidelines

If no cost values are configured for links, OSPF calculates their cost values by using the formula: 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

Use default to configure default parameters for redistributed routes.

Use undo default to remove the configuration.

Syntax

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

undo default { cost | tag | type } *

Default

The cost is 1, the tag is 1, and the route type is 2.

Views

OSPF view

Predefined user roles

network-admin

mdc-admin

Parameters

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

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

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

Examples

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

<Sysname> system-view

[Sysname] ospf 100

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

Related commands

import-route

default-cost (OSPF area view)

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

Use undo default-cost to restore the default value.

Syntax

default-cost cost

undo default-cost

Default

The cost is 1.

Views

OSPF area view

Predefined user roles

network-admin

mdc-admin

Parameters

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

Usage guidelines

This command takes effect only on the ABR of a stub area or the ABR/ASBR of an NSSA area.

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

Related commands

· nssa

· stub

default-route-advertise (OSPF view)

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

Use undo default-route-advertise to restore the default.

Syntax

undo default-route-advertise

Default

No default route is redistributed into the OSPF routing domain.

Views

OSPF view

Predefined user roles

network-admin

mdc-admin

Parameters

always: Generates a default route in a Type-5 LSA into the OSPF routing domain regardless of whether or not 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: Enables OSPF to calculate default routes received from other routers. Without this keyword, OSPF does not calculate default routes from other routers. If the router does not generate any 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 by its name, a case-sensitive string of 1 to 63 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 no type is specified, the default type for the Type-5 LSA specified by the default type command applies.

summary: Advertises the specified default route in a Type-3 LSA. This keyword is available only for VPNs.

Usage guidelines

This command redistributes a default route in a Type-5 LSA, which cannot be redistributed with the import-route command. If the local routing table has no default route, you must provide the always keyword for the command.

The default-route-advertise summary cost command is applicable only to VPNs. It enables a PE router to redistribute a default external route in a Type-3 LSA to CE routers.

Examples

# Generate a default route into the OSPF routing domain, regardless of whether the default route exists in the local routing table.

<Sysname> system-view

[Sysname] ospf 100

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

Related commands

· default

· import-route

description (OSPF/OSPF area view)

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

Use undo description to restore the default.

Syntax

description description

undo description

Default

No description is configured for an OSPF process or area.

Views

OSPF view, OSPF area view

Predefined user roles

network-admin

mdc-admin

Parameters

description: Configures a description for the OSPF process in OSPF view, or for the OSPF area in OSPF area view. The description argument specifies a string of 1 to 80 characters.

Usage guidelines

The description specified by this command is used to identify an OSPF process or area.

Examples

# Describe OSPF process 100 as abc.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] description abc

# Describe OSPF area 0 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

Use display ospf abr-asbr to display routes to the ABR or ASBR.

Syntax

display ospf [ process-id ] abr-asbr

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Parameters

process-id: Specifies an OSPF process by its ID in the range of 1 to 65535.

Usage guidelines

If no process ID is specified, this command displays routes to the ABR/ASBR for all OSPF processes.

If you use this command on routers in a stub area, the commands displays no ASBR information.

Examples

# Display information about routes to the ABR or 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 Command output

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 or ASBR.

display ospf asbr-summary

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

Syntax

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

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Parameters

process-id: Specifies an OSPF process by its ID in the range of 1 to 65535.

ip-address: Specifies an IP address in dotted decimal notation.

mask: Specifies the mask in dotted decimal notation.

mask-length: Specifies the mask length in the range of 0 to 32 bits.

Usage guidelines

If no OSPF process is specified, this command displays the summarized redistributed routes for all OSPF processes.

If no IP address is specified, this command displays all summarized redistributed routes.

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 Command output

Field	Description
Total Summary Address Count	Total number of summary routes.
Net	Address of the summary route.
Mask	Mask of the summary route address.
Tag	Tag of the summary route.
Status	Advertisement status of the summary route.
Cost	Cost to the summary network.
The Count of Route	Number of summarized routes.
Destination	Destination address of a summarized route.
Net Mask	Network mask of a summarized route.
Proto	Routing protocol.
Process	Process ID of the routing protocol.
Type	Type of a summarized route.
Metric	Metric of a summarized route.

Related commands

asbr-summary

display ospf brief

Use display ospf brief to display OSPF brief information.

Syntax

display ospf [ process-id ] brief

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Parameters

process-id: Specifies an OSPF process by its ID in the range of 1 to 65535.

Usage guidelines

If no OSPF process is specified, this command displays brief information about all OSPF processes.

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

SPF-schedule-interval: 5 50 200

LSA generation interval: 5

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

Graceful restart interval: 120

This process is currently bound to MIB

Area Count: 1 Nssa Area Count: 1

ExChange/Loading Neighbors: 0

SNMP trap rate limit interval: 2 Count: 300

Area: 0.0.0.1 (MPLS TE not enabled)

Authtype: None Area flag: NSSA

7/5 translator state: Disabled

7/5 translate stability timer interval: 0

SPF Scheduled Count: 5

ExChange/Loading Neighbors: 0

Interface: 192.168.1.2 (GigabitEthernet3/0/1)

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

FRR backup: enable

Table 3 Command output

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	Tag of redistributed routes.
Multi-VPN-Instance is not enabled	The OSPF process does not support multi-VPN-instance.
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—LSU transmit interval of the interface. · Count—Maximum number of LSU packets sent each time.
Default ASE Parameter	Default ASE Parameters: metric, tag, route type.
Route Preference	Internal route preference.
ASE Route Preference	External route preference.
SPF Computation count	SPF computation count of the OSPF process.
RFC1583 Compatible	Compatible with RFC 1583.
Area Count	Area number of the current process.
Nssa Area Count	NSSA area number of the current process.
SNMP trap rate limit interval	SNMP trap sending interval.
Count	Number of sent SNMP traps.
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—The translator is specified through commands. · Elected—The translator is designated through election. · Disabled—The device is not a translator that translates Type-7 LSAs to Type-5 LSAs.
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—No authentication. · Simple—Simple authentication. · MD5—MD5 authentication.
Area flag	Type of the area: · Normal. · Stub. · StubNoSummary (totally stub area). · NSSA. · NSSANoSummary (totally NSSA 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.
Timers	OSPF timers: · Hello—Interval for sending hello packets. · Dead—Interval within which the neighbor is down. · Poll—Interval for sending hello packets. · Retransmit—Interval for retransmitting LSAs.
FRR backup	Indicates whether Loop Free Alternate (LFA) calculation is enabled on an interface.

display ospf cumulative

Use display ospf cumulative to display OSPF statistics.

Syntax

display ospf [ process-id ] cumulative

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Parameters

process-id: Specifies an OSPF process by its ID in the range of 1 to 65535.

Usage guidelines

If no process is specified, this command displays statistics for all OSPF processes.

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 Command output

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

Use display ospf error to display OSPF error information.

Syntax

display ospf [ process-id ] error

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Parameters

process-id: Specifies an OSPF process by its ID in the range of 1 to 65535.

Usage guidelines

If no process is specified, this command displays OSPF error information for all OSPF processes.

Examples

# Display OSPF error information.

<Sysname> display ospf error

OSPF Process 1 with Router ID 192.168.1.112

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 unnumbered 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 : 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: Unknown LSA type 0 : LS UPD: Received less recent LSA

Table 5 Command output

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 unnumbered 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 graceful-restart

Use display ospf graceful-restart to display GR information for an OSPF process.

Syntax

display ospf [ process-id ] graceful-restart [ verbose ]

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Parameters

process-id: Specifies an OSPF process by its ID in the range of 1 to 65535.

verbose: Displays detailed GR information.

Usage guidelines

If no process ID is specified, this command displays GR information for all processes.

Examples

# Display detailed GR information.

<Sysname> display ospf graceful-restart verbose

OSPF Process 1 with Router ID 1.1.1.1

Graceful Restart information

Graceful Restart capability : Enable(IETF)

Graceful Restart support : Planned and un-planned,Partial

Helper capability : Enable(IETF)

Helper support : Planned and un-planned(IETF),Strict LSA check

Current GR state : Normal

Graceful Restart period : 40 seconds

Number of neighbors under Helper: 0

Number of restarting neighbors : 0

Last Restarter exit reason : None

Last Helper exit reason : None

Area: 0.0.0.0

Authtype: None Area flag: Normal

Area up Interface count: 2

Interface: 40.4.0.1 (Vlan-interface40)

Restarter state: Normal State: P-2-P Type: PTP

Neighbor count of this interface: 1

Neighbor IP address GR state Last Helper exit reason

3.3.3.3 40.4.0.3 Normal None

Virtual-link Neighbor-ID -> 4.4.4.4, Neighbor-State: Full

Restarter state: Normal

Interface: 20.2.0.1 (Vlink)

Transit Area：0.0.0.1

Neighbor IP address GR state Last Helper exit reason

4.4.4.4 20.2.0.4 Normal Reset neighbor

Table 6 Command output

Field	Description
OSPF Process 1 with Router ID 1.1.1.1 Graceful Restart information	GR information for OSPF process 1 with router ID 1.1.1.1.
Graceful Restart capability	Indicates whether GR is enabled: · Enable(IETF)—IETF GR is enabled. · Enable(nonstandard)—Non-IETF GR is enabled. · Disable—GR is disabled.
Graceful Restart support	GR modes that the process supports (the modes are displayed only when GR is enabled): · Planned and un-planned—Supports both planned and unplanned GR. · Planned only—Supports only planned GR. · Partial—Supports partial GR. · Global—Supports global GR.
Helper capability	Helper capability that the process supports: · Enable (IETF)—Supports IETF GR Helper capability. · Enable (Nonstandard)—Supports non IETF GR Helper capability. · Enable (IETF and nonstandard)—Supports both IETF GR Helper capability and non IETF GR Helper capability. · Disable—Does not support GR Helper capability.
Helper support	Displays policies that the Helper supports (the policies are displayed only when Helper is enabled): · Strict lsa check—The Helper supports strict LSA checking. · Planned and un-planned—The Helper supports planned and unplanned GR. · Planned only—The Helper supports only planned GR.
Current GR state	GR state: · Normal—Normal state. · Under GR—GR is in process. · Under Helper—The process is acting as Helper.
Area	Area ID in IP address format.
Authtype	Authentication type of the area: · None—No authentication. · Simple—Simple authentication. · MD5—MD5 authentication.
Area flag	Type of the area: · Normal. · Stub. · StubNoSummary (totally stub area). · NSSA. · NSSANoSummary (totally NSSA area).
Area up Interface count	Number of up interfaces in the area.
Interface	Interface in the area.
Restarter state	Restarter state on the interface.
State	Interface state.
Type	Interface network type.
Neighbor count of this interface	Neighbors of an interface.
Neighbor	Neighbor router ID.
IP address	Neighbor IP address.
GR state	Neighbor GR state: · Normal—Normal state. · Under GR—GR is in process. · Under Helper—The process is acting as GR Helper.
Last Helper exit reason	Reason that the Helper exited last time.
Virtual-link Neighbor-ID	Router ID of the virtual link's neighbor.
Neighbor-State	Neighbor state: Down, Init, 2-Way, ExStart, Exchange, Loading, and Full.
Interface	Output interface of the virtual link.

display ospf interface

Use display ospf interface to display OSPF interface information.

Syntax

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

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Parameters

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

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

verbose: Displays the OSPF information for all interfaces.

Usage guidelines

If no OSPF process is specified, this command displays the OSPF interface information for all OSPF processes.

If you do not provide the interface or the verbose keyword, this command displays OSPF brief information for all interfaces.

Examples

# Display all OSPF interface brief 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 7 Command output

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: · DOWN—No protocol traffic can be sent or received on the interface. · Waiting—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—The interface will send Hello packets at the interval of HelloInterval, and try to establish an adjacency with the neighbor. · DR—The router is the designated router on the network. · BDR—The router is the backup designated router on the network. · DROther—The router is a DROther router on the attached network.
Cost	Interface cost.
Pri	Router priority.
DR	DR on the interface's network segment.
BDR	BDR on the interface's network segment.

# Display detailed information about VLAN-interface 7.

<Sysname> display ospf interface Vlan-interface 7

OSPF Process 1 with Router ID 192.168.1.1

Interfaces

Interface: 172.16.0.1 (Vlan-interface7)

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

Priority: 1

Designated Router: 172.16.0.1

Backup Designated Router: 0.0.0.0

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

FRR backup: enable

Table 8 Command output

Field	Description
Interface	Information about the interface, such as the IP address.
Timers	OSPF timers: hello, dead, poll, retransmit, and transmit delay.
FRR backup	Indicates whether LFA calculation is enabled on an interface.

display ospf lsdb

Use display ospf lsdb to display OSPF LSDB information.

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 ] ]

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Parameters

process-id: Specifies an OSPF process by its 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: Specifies a 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.

Usage guidelines

If no OSPF process is specified, this command displays LSDB information for all OSPF processes.

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

Type 9 Opaque (Link-Local Scope) Database

Flags: * -Vlink interface LSA

Type LinkState ID AdvRouter Age Len Sequence Interfaces

*Opq-Link 3.0.0.0 7.2.2.1 8 14 80000001 10.1.1.2

*Opq-Link 3.0.0.0 7.2.2.2 8 14 80000001 20.1.1.2

Table 9 Command output

Field	Description
Area	LSDB information of the area.
Type	LSA type (see Table 4).
LinkState ID	Link state ID.
AdvRouter	Advertising router.
Age	Age of the LSA.
Len	Length of the LSA.
Sequence	Sequence number of the LSA.
Metric	Cost of the LSA.
*Opq-Link	Opaque LSA generated by a virtual link.

# Display Type-2 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 10 Command output

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 peer

Use display ospf peer to display information about OSPF neighbors.

Syntax

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

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Parameters

process-id: Specifies an OSPF process by ID in the range of 1 to 65535.

verbose: Displays detailed neighbor information.

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

neighbor-id: Specifies a neighbor router ID.

Usage guidelines

If no OSPF process is specified, this command displays OSPF neighbor information for all OSPF processes.

If the verbose keyword is not specified, this command displays brief OSPF neighbor information.

If no interface is specified, this command displays the neighbor information for all interfaces.

If no neighbor ID is specified, this command displays all neighbor information.

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(GigabitEthernet3/0/1)'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

Options is 0x02 (-|-|-|-|-|-|E|-)

Dead timer due in 33 sec

Neighbor is up for 02:03:35

Authentication Sequence: [ 0 ]

Neighbor state change count: 6

Table 11 Command output

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—Initial state of a neighbor conversation. · Init—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 at a longer interval to keep neighbor relationship. · 2-Way—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—The router is sending DD packets to the neighbor, describing its entire link-state database. · Loading—The router sends LSRs packets to the neighbor, requesting more recent LSAs. · Full—The neighboring routers are fully adjacent.
Mode	Neighbor mode for LSDB synchronization.
Priority	Neighboring router priority.
DR	DR on the interface’s network segment.
BDR	BDR on the interface’s network segment.
MTU	Interface MTU.
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.
Dead timer due in 33 sec	This dead timer will expire 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 GE3/0/1 Full/DR

Table 12 Command output

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

Use display ospf peer statistics to display OSPF neighbor statistics.

Syntax

display ospf [ process-id ] peer statistics

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Parameters

process-id: Specifies an OSPF process by its ID in the range of 1 to 65535.

Usage guidelines

If no OSPF process is specified, this command displays OSPF neighbor statistics for all OSPF processes.

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 13 Command output

Field	Description
Area ID	The state statistics information 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 under the same state: Down, Attempt, Init, 2-Way, ExStart, Exchange, Loading, or Full.

display ospf request-queue

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

Syntax

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

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Parameters

process-id: Specifies an OSPF process by its ID in the range of 1 to 65535.

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

neighbor-id: Specifies a neighbor's router ID.

Usage guidelines

If no OSPF process is specified, this command displays the OSPF request queue information for all OSPF processes.

If no interface is specified, this command displays the OSPF request queue information for all interfaces.

If no neighbor is specified, this command displays the OSPF request queue information for all OSPF neighbors.

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 14 Command output

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

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

Syntax

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

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Parameters

process-id: Specifies an OSPF process by its ID in the range of 1 to 65535.

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

neighbor-id: Specifies a neighbor's router ID.

Usage guidelines

If no OSPF process is specified, this command displays retransmission queue information for all OSPF processes.

If no interface is specified, this command displays retransmission queue information for all interfaces.

If no neighbor is specified, this command displays retransmission queue information for all neighbors.

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 15 Command output

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

Use display ospf routing to display OSPF routing information.

Syntax

display ospf [ process-id ] routing [ ip-address { mask | mask-length } ] [ interface interface-type interface-number ] [ nexthop nexthop-address ] [ verbose ]

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Parameters

process-id: Specifies an OSPF process by its ID in the range of 1 to 65535.

ip-address: Specifies a destination IP address.

mask: Specifies the mask in dotted decimal notation.

mask-length: Specifies mask length in the range of 0 to 32 bits.

interface interface-type interface-number: Displays routes passing the specified output interface.

nexthop nexthop-address: Displays routes passing the specified next hop.

verbose: Displays detailed OSPF routing information.

Usage guidelines

If no OSPF process is specified, this command displays the routing information for all OSPF processes.

If no interface is specified, this command displays OSPF routing information for all interfaces.

If no next hop is specified, this command displays all OSPF routing information.

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 16 Command output

Field	Description
Destination	Destination network.
Cost	Cost to destination.
Type	Route type: intra-area, transit, stub, inter-area, Type-1 external, Type-2 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 detailed OSPF routing information.

<Sysname> display ospf routing verbose

OSPF Process 2 with Router ID 192.168.1.112

Routing Tables

Routing for Network

Destination: 192.168.1.0/24

Cost: 1562 Type: Stub

AdvRouter: 192.168.1.2 Area: 0.0.0.0

SubProtoID: 0x1 Preference: 10

NextHop: 192.168.1.2 BkNextHop: N/A

NetworkType: Broadcast BkNetworkType: N/A

Destination: 172.16.0.0/16

Cost: 1563 Type: Inter

AdvRouter: 192.168.1.1 Area: 0.0.0.0

SubProtoID: 0x1 Preference: 10

NextHop: 192.168.1.1 BkNextHop: N/A

NetworkType: Broadcast BkNetworkType: N/A

Total Nets: 2

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

Table 17 Command output

Field	Description
SubProtoID	Sub protocol ID.
Preference	OSPF preference.
NbrId	Neighbor router ID.
NextHop	Primary next hop IP address.
BkNextHop	Backup next hop IP address.
NetworkType	Type of the network to which the primary next hop belongs.
BkNetworkType	Type of the network to which the backup next hop belongs.
Preference	OSPF route preference.

display ospf vlink

Use display ospf vlink to display OSPF virtual link information.

Syntax

display ospf [ process-id ] vlink

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Parameters

process-id: Specifies an OSPF process by its ID in the range of 1 to 65535.

Usage guidelines

If no OSPF process is specified, this command displays the OSPF virtual link information for all OSPF processes.

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 (GigabitEthernet3/0/1)

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 18 Command output

Field	Description
Virtual-link Neighbor-ID	ID of the neighbor on the virtual link.
Neighbor-State	Neighbor state: Down, Init, 2-Way, ExStart, Exchange, Loading, Full.
Interface	IP address and name of the local interface on the virtual link.
Cost	Interface route cost.
State	Interface state.
Type	Virtual link.
Transit Area	Transit area ID.
Timers	Values of timers: hello, dead, retransmit, and interface transmission delay.

display router id

Use display router id to display the global router ID.

Syntax

display router id

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Examples

# Display the global router ID.

<Sysname> display router id

Configured router ID is 1.1.1.1

enable link-local-signaling

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

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

Syntax

enable link-local-signaling

undo enable link-local-signaling

Default

OSPF link-local signaling capability is disabled.

Views

OSPF view

Predefined user roles

network-admin

mdc-admin

Examples

# Enable link-local signaling for OSPF process 1.

<Sysname> system-view

[Sysname] ospf 1

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

enable out-of-band-resynchronization

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

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

Syntax

enable out-of-band-resynchronization

undo enable out-of-band-resynchronization

Default

The OSPF out-of-band resynchronization capability is disabled.

Views

OSPF view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

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

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

Related commands

enable link-local-signaling

fast-reroute (OSPF view)

Use fast-reroute to configure OSPF FRR.

Use undo fast-reroute to restore the default.

Syntax

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

undo fast-reroute

Default

OSPF FRR is disabled.

Views

OSPF view

Predefined user roles

network-admin

mdc-admin

Parameters

lfa: Uses the LFA algorithm to calculate a backup next hop for all routes.

abr-only: Uses the next hop of the route to the ABR as the backup next hop.

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

Usage guidelines

Do not use OSPF FRR and BFD for OSPF at the same time. Otherwise, OSPF FRR might fail to work.

Do not use the fast-reroute lfa command together with the command vlink-peer, sham-link, enable traffic-adjustment, or enable traffic-adjustment advertise in MPLS Command Reference.

Examples

# Enable FRR to calculate a backup next hop for all routes by using LFA algorithm in OSPF process 1.

<Sysname> system-view

[Sysname] ospf 1

[Sysname-ospf-1] fast-reroute lfa

filter (OSPF area view)

NOTE:

This command is available only on an ABR.

Use filter to configure OSPF to filter inbound/outbound Type-3 LSAs on an ABR.

Use undo filter to disable Type-3 LSA filtering.

Syntax

filter { acl-number | prefix-list prefix-list-name | route-policy route-policy-name } { export | import }

undo filter { export | import }

Default

Type-3 LSAs are not filtered.

Views

OSPF area view

Predefined user roles

network-admin

mdc-admin

Parameters

acl-number: Specifies an ACL by its number in the range of 2000 to 3999 to filter inbound/outbound Type-3 LSAs.

prefix-list-name: Specifies an IP prefix list by its name, a case-sensitive string of 1 to 63 characters, to filter inbound/outbound Type-3 LSAs.

route-policy-name: Specifies a routing policy by its name, a case-sensitive string of 1 to 63 characters, to filter inbound/outbound Type-3 LSAs.

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

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

Examples

# Use IP prefix list my-prefix-list to filter inbound Type-3 LSAs, and use 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 prefix-list my-prefix-list import

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

filter-policy export (OSPF view)

Use filter-policy export to configure OSPF to filter redistributed routes.

Use undo filter-policy export to remove the configuration.

Syntax

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

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

Default

Redistributed routes are not filtered.

Views

OSPF view

Predefined user roles

network-admin

mdc-admin

Parameters

acl-number: Specifies an ACL by its number in the range of 2000 to 3999 to filter redistributed routes by destination address.

prefix-list-name: Specifies an IP prefix list by its name, a case-sensitive string of 1 to 63 characters, to filter redistributed routes by destination address.

protocol: Filters routes redistributed from the specified routing protocol, which can be bgp, direct, isis, ospf, rip, and static. If no protocol is specified, this command filters all redistributed routes.

process-id: Specifies a process by its ID in the range of 1 to 65535. This argument is available only when the protocol is rip, ospf or isis.

Usage guidelines

To reference an advanced ACL (with a number from 3000 to 3999) in the command, configure the ACL using one of the following methods:

· To deny/permit a route with the specified destination, use the rule [ rule-id ] { deny | permit } ip source sour-addr sour-wildcard command.

· To deny/permit a route with the specified destination and mask, use the rule [ rule-id ] { deny | permit } ip source sour-addr sour-wildcard destination dest-addr dest-wildcard command.

The source keyword specifies the destination address of a route and the destination keyword specifies the subnet mask of the route. The specified subnet mask must be contiguous. Otherwise, the mask configuration does not take effect.

Examples

# Use ACL 2000 to filter redistributed routes.

<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 export

# Configure ACL 3000 to permit only route 113.0.0.0/16. Use 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

Related commands

import-route

filter-policy import (OSPF view)

Use filter-policy import to configure OSPF to filter routes calculated using received LSAs.

Use undo filter-policy import to restore the default.

Syntax

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

undo filter-policy import

Default

Routes calculated using received LSAs are not filtered.

Views

OSPF view

Predefined user roles

network-admin

mdc-admin

Parameters

acl-number: Specifies an ACL by its number in the range of 2000 to 3999 to filter inbound routes by destination.

gateway prefix-list-name: Specifies an IP prefix list by its name, a case-sensitive string of 1 to 63 characters, to filter inbound routes by next hop.

prefix-list prefix-list-name: Specifies an IP prefix list by its name, a case-sensitive string of 1 to 63 characters, to filter inbound routes by destination.

route-policy route-policy-name: Specifies a routing policy by its name, a case-sensitive string of 1 to 63 characters, to filter inbound routes.

Usage guidelines

To reference an advanced ACL (with a number from 3000 to 3999) in the command or in the specified routing policy, configure the ACL in one of the following ways:

· To deny/permit a route with the specified destination, use the rule [ rule-id ] { deny | permit } ip source sour-addr sour-wildcard command.

· To deny/permit a route with the specified destination and mask, use the rule [ rule-id ] { deny | permit } ip source sour-addr sour-wildcard destination dest-addr dest-wildcard command.

The source keyword specifies the destination address of a route and the destination keyword specifies the subnet mask of the destination address. The specified subnet mask must be contiguous. Otherwise, the mask configuration does not take effect.

Examples

# Use ACL 2000 to filter inbound routes.

<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. Use ACL 3000 to filter inbound 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)

Use graceful-restart to enable OSPF GR.

Use undo graceful-restart to disable OSPF GR.

Syntax

graceful-restart [ ietf | nonstandard ] [ global | planned-only ] *

undo graceful-restart

Default

OSPF GR is disabled.

Views

OSPF view

Predefined user roles

network-admin

mdc-admin

Parameters

ietf: Enables IETF GR.

nonstandard: Enables non-IETF GR.

global: Enables global GR. In global GR mode, a GR process can be completed only when all GR Helpers exist. A GR process fails if a GR Helper fails (for example, the interface connected to the GR Helper goes down). Without this keyword, this command enables partial GR. In partial GR mode, a GR process can be completed if a GR Helper exists.

planned-only: Enables planned only GR. Without this keyword, this command enables both planned GR and unplanned GR.

Usage guidelines

GR includes planned GR and unplanned GR:

· Planned GR—Manually restart OSPF or perform an active/standby switchover. Before OSPF restart or active/standby switchover, the GR Restarter sends Grace-LSAs to GR Helpers.

· Non-planned GR—OSPF restarts or an active/standby switchover occurs because of device failure. Before OSPF restart or active/standby switchover, the GR Restarter does not send Grace-LSAs to GR Helpers.

Before enabling IETF GR for OSPF, enable Opaque LSA advertisement and reception with the opaque-capability enable command.

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

If you do not provide the nonstandard or ietf keyword, the command enables non-IETF GR for OSPF.

Examples

# Enable IETF GR 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 GR 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

Related commands

· enable link-local-signaling

· enable out-of-band-resynchronization

· opaque-capability enable

graceful-restart helper enable

Use graceful-restart helper enable to enable OSPF GR Helper capability.

Use undo graceful-restart helper enable to disable OSPF GR Helper capability.

Syntax

graceful-restart helper enable [ planned-only ]

undo graceful-restart helper enable

Default

OSPF GR Helper capability is enabled.

Views

OSPF view

Predefined user roles

network-admin

mdc-admin

Parameters

planned-only: Enable only planned GR for the GR Helper. Without this keyword, this command enables both planned GR and unplanned GR for the GR Helper.

Usage guidelines

The planned-only keyword is available only for the IETF GR Helper.

Examples

# Enable GR Helper capability for OSPF process 1.

<Sysname> system-view

[Sysname] ospf 1

[Sysname-ospf-1] graceful-restart helper enable

graceful-restart helper strict-lsa-checking

Use graceful-restart helper strict-lsa-checking to enable strict LSA checking capability for GR Helper.

Use undo graceful-restart helper strict-lsa-checking to disable strict LSA checking capability for GR Helper.

Syntax

graceful-restart helper strict-lsa-checking

undo graceful-restart helper strict-lsa-checking

Default

Strict LSA checking capability for GR Helper is disabled.

Views

OSPF view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

When an LSA change on the GR Helper is detected, the GR Helper device exits the GR Helper mode.

Examples

# Enable strict LSA checking capability for GR Helper in OSPF process 1.

<Sysname> system-view

[Sysname] ospf 1

[Sysname-ospf-1] graceful-restart helper strict-lsa-checking

graceful-restart interval (OSPF view)

Use graceful-restart interval to configure the GR interval.

Use undo graceful-restart interval to restore the default GR interval.

Syntax

graceful-restart interval interval-value

undo graceful-restart interval

Default

The GR interval is 120 seconds.

Views

OSPF view

Predefined user roles

network-admin

mdc-admin

Parameters

interval-value: Specifies the GR interval in the range of 40 to 1800 seconds.

Usage guidelines

The value of the GR restart interval cannot be smaller than the maximum OSPF neighbor dead time of all the OSPF interfaces. Otherwise, GR restart might fail.

Examples

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

<Sysname> system-view

[Sysname] ospf 1

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

Related commands

ospf timer dead

host-advertise

Use host-advertise to advertise a host route.

Use undo host-advertise to remove a host route.

Syntax

host-advertise ip-address cost

undo host-advertise ip-address

Default

No host route is advertised.

Views

OSPF area view

Predefined user roles

network-admin

mdc-admin

Parameters

ip-address: Specifies the IP address of a host.

cost: Specifies a cost for the route, in the range of 1 to 65535.

Examples

# Advertise host route 1.1.1.1 with a cost of 100.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] area 0

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

import-route (OSPF view)

Use import-route to redistribute AS-external routes from another routing protocol.

Use undo import-route to disable route redistribution from another routing protocol.

Syntax

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

Default

OSPF does not redistribute AS-external routes from any other routing protocol.

Views

OSPF view

Predefined user roles

network-admin

mdc-admin

Parameters

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

process-id: Specifies an process by its 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 redistribution of IBGP routes. It is available only when the protocol is bgp.

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

route-policy route-policy-name: Uses the specified routing policy to filter redistributed routes. The route-policy-name argument is a case-sensitive string of 1 to 63 characters.

tag tag: Specifies a tag for marking external LSAs, in the range of 0 to 4294967295. The default is 1.

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

Usage guidelines

This command redistributes routes destined for other ASs from another protocol. AS external routes include the following types:

· Type-1 external route

· Type-2 external route

A Type-1 external route has high reliability. Its cost is comparable with the cost of OSPF internal routes. The cost from an OSPF router to a Type-1 external route's destination equals the cost from the router to the ASBR plus the cost from the ASBR to the external route's destination.

A Type-2 external route has low credibility. OSPF considers the cost from the ASBR to the destination of a Type-2 external route is much bigger than the cost from the ASBR to an OSPF internal router. 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.

The import-route command cannot redistribute default external routes.

The import-route bgp command redistributes only EBGP routes. Because the import-route bgp allow-ibgp command redistributes both EBGP and IBGP routes and might cause routing loops, use it with caution.

Only active routes can be redistributed. To view information about active routes, use the display ip routing-table protocol command.

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

Related commands

default-route-advertise

ispf enable

Use ispf enable to enable OSPF incremental SPF (ISPF).

Use undo ispf enable to disable OSPF ISPF.

Syntax

ispf enable

undo ispf enable

Default

OSPF ISPF is enabled.

Views

OSPF view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

Upon topology changes, ISPF recomputes only the affected part of the SPT, instead of the entire SPT.

Examples

# Enable ISPF for OSPF process 100.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] ispf enable

log-peer-change

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

Use undo log-peer-change to disable the logging of OSPF neighbor state changes.

Syntax

log-peer-change

undo log-peer-change

Default

The logging of OSPF neighbor state changes is enabled.

Views

OSPF view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

After you enable this feature, the information about OSPF neighbor state changes will be output to 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

Use lsa-arrival-interval to specify the LSA arrival interval.

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

Syntax

lsa-arrival-interval interval

undo lsa-arrival-interval

Default

The LSA arrival interval is 1000 milliseconds.

Views

OSPF view

Predefined user roles

network-admin

mdc-admin

Parameters

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

Usage guidelines

If an LSA that has the same LSA type, LS ID, originating router ID as the previous LSA is received within the interval, OSPF discards the LSA. This feature helps protect resources from being over consumed due to frequent network changes.

The interval set with the lsa-arrival-interval command should be smaller or equal to the initial interval set with the lsa-generation-interval command.

Examples

# Set the LSA arrival interval to 200 milliseconds.

<Sysname> system-view

[Sysname] ospf 100

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

Related commands

lsa-generation-interval

lsdb-overflow-interval

Use lsdb-overflow-interval to configure the interval that OSPF exits overflow state.

Use undo lsdb-overflow-interval to restore the default.

Syntax

lsdb-overflow-interval interval

undo lsdb-overflow-interval

Default

The OSPF exit overflow interval is 300 seconds.

Views

OSPF view

Predefined user roles

network-admin

mdc-admin

Parameters

interval: Specifies the interval that OSPF exits overflow state, in the range of 0 to 2147483647 seconds.

Usage guidelines

When the number of LSAs in the LSDB exceeds the upper limit, the LSDB is in an overflow state. In this state, OSPF does not receive any external LSAs and deletes the external LSAs generated by itself to save system resources.

You can configure the interval that OSPF exits overflow state. An interval of 0 indicates that the timer is not started and OSPF does not exit overflow state.

Examples

# Configure the OSPF exit overflow interval as 10 seconds.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] lsdb-overflow-interval 10

lsa-generation-interval

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

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

Syntax

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

undo lsa-generation-interval

Default

The maximum interval is 5 seconds, the minimum interval is 0 milliseconds, and the incremental interval is 0 milliseconds.

Views

OSPF view

Predefined user roles

network-admin

mdc-admin

Parameters

maximum-interval: Specifies the maximum LSA generation interval in the range of 1 to 60 seconds.

minimum-interval: Specifies the minimum LSA generation interval in the range of 10 to 60000 milliseconds. 0 indicates that the minimum interval can be any value.

incremental-interval: Specifies the LSA generation incremental interval in the range of 10 to 60000 milliseconds.

Usage guidelines

When network changes are not frequent, LSAs are generated at the minimum-interval. If network changes become frequent, the LSA generation interval is incremented by incremental-interval × 2^n-2 (n is the number of generation times) each time a LSA generation occurs until the maximum-interval is reached.

The minimum interval and the incremental interval cannot be greater than the maximum 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

Related commands

lsa-arrival-interval

lsdb-overflow-limit

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

Use undo lsdb-overflow-limit to restore the default.

Syntax

lsdb-overflow-limit number

undo lsdb-overflow-limit

Default

The number of external LSAs is not limited.

Views

OSPF view

Predefined user roles

network-admin

mdc-admin

Parameters

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

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)

Use maximum load-balancing to specify the maximum number of equal-cost multi-path (ECMP) routes for load balancing.

Use undo maximum load-balancing to restore the default.

Syntax

maximum load-balancing maximum

undo maximum load-balancing

Default

The maximum number of ECMP routes is 32.

Views

OSPF view

Predefined user roles

network-admin

mdc-admin

Parameters

maximum: Specifies the maximum number of ECMP routes, in the range of 1 to 32. No ECMP load balancing is available when the number is set to 1.

Examples

# Specify the maximum number of ECMP routes as 2.

<Sysname> system-view

[Sysname] ospf 100

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

maximum-routes

Use maximum-routes to specify the maximum number of OSPF routes.

Use undo maximum-routes to restore the default.

Syntax

maximum-routes number

undo maximum-routes

Default

The maximum number of OSPF routes is 4294967295.

Views

OSPF view

Predefined user roles

network-admin

mdc-admin

Parameters

number: Specifies the maximum number of OSPF routes, in the range of 0 to 4294967295.

Examples

# Specify the maximum number of OSPF routes as 500.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] maximum-routes 500

network (OSPF area view)

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

Use undo network to disable OSPF for the interface attached to the specified network in the area.

Syntax

network ip-address wildcard-mask

undo network ip-address wildcard-mask

Default

OSPF is not enabled for any interface.

Views

OSPF area view

Predefined user roles

network-admin

mdc-admin

View

OSPF area view

Parameters

ip-address: Specifies the IP address of a network.

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

Usage guidelines

This command enables OSPF on the interface attached to the specified network. The interface's primary IP address must be in the specified network. If only the interface's secondary IP address is in the network, the interface cannot run 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

Related commands

ospf

nssa

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

Use undo nssa to restore the default.

Syntax

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

undo nssa

Default

No area is configured as an NSSA area.

Views

OSPF area view

Predefined user roles

network-admin

mdc-admin

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 area regardless of whether a default route is available in the routing table. If it is configured on an ASBR, the ASBR generates a default route in a Type-7 LSA only when the default route is available in the routing table.

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 correct external routes are redistributed.

no-summary: Usable only on an NSSA ABR to advertise a default route in a Type-3 summary LSA into the NSSA area and to not advertise other summary LSAs 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, during which the translator can maintain its translating capability after a device with a higher priority becomes the new translator. The value argument is the stability interval in the range of 0 to 900 seconds and defaults to 0 (which means the translator does not maintain its translating capability when a new translator arises).

Usage guidelines

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

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

Related commands

default-cost

opaque-capability enable

Use opaque-capability enable to enable opaque LSA advertisement and reception.

Use undo opaque-capability to disable opaque LSA advertisement and reception.

Syntax

opaque-capability enable

undo opaque-capability

Default

The feature is enabled.

Views

OSPF view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

After the opaque LSA advertisement and reception is enabled, OSPF can receive and advertise Type-9, Type-10, and Type-11 opaque LSAs.

Examples

# Disable opaque LSA advertisement and reception.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] undo opaque-capability

ospf

Use ospf to enable an OSPF process.

Use undo ospf to disable an OSPF process.

Syntax

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

undo ospf [ process-id ]

Default

No OSPF process is enabled.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

process-id: Specifies an OSPF process by its ID in the range of 1 to 65535.

router-id router-id: Specifies an OSPF router ID in dotted decimal notation.

vpn-instance vpn-instance-name: Specifies an MPLS L3VPN by its name, a case-sensitive string of 1 to 31 characters. If no VPN is specified, the OSPF process runs on the public network.

Usage guidelines

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

Enable an OSPF process 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

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

Use undo ospf authentication-mode to remove specified configuration.

Syntax

For MD5/HMAC-MD5 authentication:

ospf authentication-mode { hmac-md5 | md5 } key-id { cipher cipher-string | plain plain-string }

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

For simple authentication:

ospf authentication-mode simple { cipher cipher-string | plain plain-string }

undo ospf authentication-mode simple

Default

No authentication is configured.

Views

Interface view

Predefined user roles

network-admin

mdc-admin

Parameters

hmac-md5: Enables HMAC-MD5 authentication.

md5: Enables MD5 authentication.

simple: Enables simple authentication.

key-id: Specifies a key by its ID in the range of 1 to 255.

cipher: Sets a ciphertext key.

cipher-string: Specifies a ciphertext key. For simple authentication, specify a case-sensitive key of 33 to 41 characters. For MD5/HMAC-MD5 authentication, specify a key of 33 to 53 characters.

plain: Sets a plaintext key.

plain-string: Specifies a plaintext key. For simple authentication, specify a case-sensitive key of 1 to 8 characters. For MD5/HMAC-MD5 authentication, specify a key of 1 to 16 characters.

Usage guidelines

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

For secrecy, all keys, including keys configured in plain text, are saved in cipher text.

Examples

# Enable MD5 authentication for the network 131.119.0.0/16 in Area 1. Set the interface key ID to 15, and plaintext authentication password to 123456.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] area 1

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

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

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

[Sysname-ospf-100] quit

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] ospf authentication-mode md5 15 plain 123456

# Enable simple authentication for the network 131.119.0.0/16 in Area 1. Set the plaintext authentication password to 123456.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] area 1

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

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

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

[Sysname-ospf-100] quit

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] ospf authentication-mode simple plain 123456

Related commands

authentication-mode

ospf bfd enable

Use ospf bfd enable to enable BFD on an OSPF interface.

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

Syntax

ospf bfd enable [ echo ]

undo ospf bfd enable

Default

BFD for OSPF is disabled.

Views

Interface view

Predefined user roles

network-admin

mdc-admin

Parameters

echo: Enables BFD single-hop echo detection. Without this keyword, this command enables BFD bidirectional control detection.

Usage guidelines

Do not use OSPF FRR and BFD for OSPF at the same time. Otherwise, OSPF FRR might fail to take effect.

Examples

# Enable BFD for OSPF 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

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

Use undo ospf cost to restore the default.

Syntax

ospf cost value

undo ospf cost

Default

An interface computes its OSPF cost according to the interface bandwidth.

Views

Interface view

Predefined user roles

network-admin

mdc-admin

Parameters

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

Usage guidelines

The ospf cost command sets an OSPF cost for an interface. If you do not use this command, the interface automatically computes its OSPF cost.

Examples

# Set the OSPF cost on VLAN-interface 10 to 65.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] ospf cost 65

ospf dr-priority

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

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

Syntax

ospf dr-priority priority

undo ospf dr-priority

Default

The router priority is 1.

Views

Interface view

Predefined user roles

network-admin

mdc-admin

Parameters

priority: Specify the router priority for the interface, in the range of 0 to 255.

Usage guidelines

The greater the value, the higher the priority for DR/BDR election. If a device has a priority of 0, it will not be elected as a DR or BDR.

Examples

# Set the router priority on VLAN-interface 10 to 8.

<Sysname> system-view

[Sysname] interface vlan-interface 10

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

ospf fast-reroute lfa-backup

Use ospf fast-reroute lfa-backup to enable LFA on the interface.

Use undo ospf fast-reroute lfa-backup to disable LFA on the interface.

Syntax

ospf fast-reroute lfa-backup

undo ospf fast-reroute lfa-backup

Default

LFA is enabled on the interface.

Predefined user roles

network-admin

mdc-admin

Usage guidelines

If you enable LFA on an interface, it can be selected as a backup interface. After you disable LFA on the interface, it cannot be selected as a backup.

Examples

# Disable VLAN-interface 11 from calculating a backup next hop by using the LFA algorithm.

<Sysname> system-view

[Sysname] interface vlan-interface 11

[Sysname-Vlan-interface11] undo ospf fast-reroute lfa-backup

ospf mib-binding

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

Use undo ospf mib-binding to restore the default.

Syntax

ospf mib-binding process-id

undo ospf mib-binding

Default

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

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

process-id: Specifies an OSPF process by its ID in the range of 1 to 65535.

Examples

# Bind MIB operation to OSPF process 100.

<Sysname> system-view

[Sysname] ospf mib-binding 100

ospf mtu-enable

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

Use undo ospf mtu-enable to restore the default.

Syntax

ospf mtu-enable

undo ospf mtu-enable

Default

The MTU in DD packets is 0.

Views

Interface view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

After a virtual link is established through a Virtual-Template or Tunnel, two devices on the link from different vendors might have different MTU values. To make them consistent, restore the interfaces' MTU to the default value 0.

After you configure this command, the interface checks whether the MTU in a received DD packet is greater than its own MTU. If yes, the interface discards the packet.

Examples

# Enable VLAN-interface 10 to add the interface MTU value into DD packets.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] ospf mtu-enable

ospf network-type

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

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

Syntax

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

undo ospf network-type

Default

The network type of an interface is broadcast.

Views

Interface view

Predefined user roles

network-admin

mdc-admin

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.

Usage guidelines

If a router on a broadcast network does not support multicast, configure the network type for the connected interfaces as NBMA.

If any two routers on an NBMA network are directly connected through a virtual link, the network is fully meshed, and you can configure the network type for the connected interfaces as NBMA. If two routers are not directly connected, configure the P2MP network type so that the two routers can exchange routing information through another router.

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

If only two routers run OSPF on a network, you can configure the network type for the connected interfaces as P2P.

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

Examples

# Configure the OSPF network type for VLAN-interface 10 as NBMA.

<Sysname> system-view

[Sysname] interface vlan-interface 10

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

Related commands

ospf dr-priority

ospf timer dead

Use ospf timer dead to set the neighbor dead interval.

Use undo ospf timer dead to restore the default.

Syntax

ospf timer dead seconds

undo ospf timer dead

Default

The dead interval is 40 seconds for broadcast and P2P interfaces. The dead interval is 120 seconds for P2MP and NBMA interfaces.

Views

Interface view

Predefined user roles

network-admin

mdc-admin

Parameters

seconds: Specifies the dead interval in the range of 1 to 2147483647 seconds.

Usage guidelines

If an interface receives no hello packet from a 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. Routers attached to the same segment must have the same dead interval.

Examples

# Configure the dead interval for VLAN-interface 10 as 60 seconds.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] ospf timer dead 60

Related commands

ospf timer hello

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

Use undo ospf timer hello to restore the default.

Syntax

ospf timer hello seconds

undo ospf timer hello

Default

The hello interval is 10 seconds for P2P and broadcast interfaces, and is 30 seconds for P2MP and NBMA interfaces.

Views

Interface view

Predefined user roles

network-admin

mdc-admin

Parameters

seconds: Specifies the hello interval in the range of 1 to 65535 seconds.

Usage guidelines

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

Examples

# Configure the hello interval on VLAN-interface as 20 seconds.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] ospf timer hello 20

Related commands

ospf timer dead

ospf timer poll

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

Use undo ospf timer poll to restore the default.

Syntax

ospf timer poll seconds

undo ospf timer poll

Default

The poll interval is 120 seconds on an interface.

Views

Interface view

Predefined user roles

network-admin

mdc-admin

Parameters

seconds: Specifies the poll interval in the range of 1 to 2147483647 seconds.

Usage guidelines

When an NBMA interface finds its neighbor is down, it sends hello packets at the poll interval.

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

Examples

# Set the poll timer interval on VLAN-interface 10 to 130 seconds.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] ospf timer poll 130

Related commands

ospf timer hello

ospf timer retransmit

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

Use undo ospf timer retransmit to restore the default.

Syntax

ospf timer retransmit interval

undo ospf timer retransmit

Default

The LSA retransmission interval is 5 seconds on an interface.

Views

Interface view

Predefined user roles

network-admin

mdc-admin

Parameters

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

Usage guidelines

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

To avoid unnecessary retransmissions, set the retransmission interval as needed.

Examples

# Set the LSA retransmission interval to 8 seconds on VLAN-interface 10.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] ospf timer retransmit 8

ospf trans-delay

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

Use undo ospf trans-delay to restore the default.

Syntax

ospf trans-delay seconds

undo ospf trans-delay

Default

The LSA transmission delay is 1 second.

Views

Interface view

Predefined user roles

network-admin

mdc-admin

Parameters

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

Usage guidelines

Each LSA in the LSDB has an age that is incremented by 1 every second, but the age does not change during transmission. Adding a transmission delay into the age time is important in low speed networks.

Examples

# Set the LSA transmission delay to 3 seconds on VLAN-interface 10.

<Sysname> system-view

[Sysname] interface vlan-interface 10

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

peer

Use peer to specify a neighbor and a DR priority for the neighbor.

Use undo peer to remove the configuration.

Syntax

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

undo peer ip-address

Default

No neighbor is specified.

Views

OSPF view

Predefined user roles

network-admin

mdc-admin

Parameters

ip-address: Specifies a 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 neighbor DR priority, in the range of 0 to 255. The default neighbor DR priority is 1.

Usage guidelines

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.

Routers on the network cannot find neighbors through broadcasting hello packets, so you must 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 applies only to P2MP neighbors. 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.

Examples

# Specify the neighbor 1.1.1.1.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] peer 1.1.1.1

Related commands

ospf dr-priority

preference

Use preference to set a preference for OSPF.

Use undo preference to restore the default.

Syntax

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

undo preference [ ase ]

Default

The preference is 10 for OSPF internal routes and 150 for OSPF external routes (or ASE routes).

Views

OSPF view

Predefined user roles

network-admin

mdc-admin

Parameters

ase: Sets a preference for OSPF external routes. Without this keyword, the command sets a preference for OSPF internal routes.

route-policy route-policy-name: Specifies a routing policy by its name, a case-sensitive string of 1 to 63 characters, to set a preference for the specified routes.

value: Specifies the preference value in the range of 1 to 255. The smaller the value, the higher the preference.

Usage guidelines

If multiple routing protocols find routes to the same destination, the router uses the route found by the protocol with the highest preference.

Examples

# Set a preference of 200 for OSPF external routes.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] preference ase 200

# Use a routing policy to set a preference.

<Sysname> system-view

[Sysname] ip prefix-list test index 10 permit 100.1.1.0 24

[Sysname] route-policy pre permit node 10

[Sysname-route-policy-pre-10] if-match ip-prefix test

[Sysname-route-policy-pre-10] quit

[Sysname] ospf 100

[Sysname-ospf-100] preference route-policy pre

reset ospf counters

Use reset ospf counters to clear OSPF statistics.

Syntax

reset ospf [ process-id ] counters

Views

User view

Predefined user roles

network-admin

mdc-admin

Parameters

process-id: Clears the statistics an OSPF process specified by its ID in the range of 1 to 65535.

Examples

# Clear OSPF statistics for all processes.

<Sysname> reset ospf counters

reset ospf process

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

Syntax

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

Views

User view

Predefined user roles

network-admin

mdc-admin

Parameters

process-id: Specifies an OSPF process by its ID in the range of 1 to 65535.

graceful-restart: Resets the OSPF process by using GR.

Usage guidelines

If no process is specified, this command restarts all OSPF processes.

The reset ospf process command performs the following actions:

· Clears all invalid LSAs without waiting for their timeouts.

· Makes a newly configured Router ID take effect.

· Starts a new round of DR/BDR election.

· Does not remove previous OSPF configurations.

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

Examples

# Reset all OSPF processes.

<Sysname> reset ospf process

Reset OSPF process? [Y/N]:y

reset ospf redistribution

Use reset ospf redistribution to restart route redistribution.

Syntax

reset ospf [ process-id ] redistribution

Views

User view

Predefined user roles

network-admin

mdc-admin

Parameters

process-id: Specifies an OSPF process by its ID in the range of 1 to 65535.

Usage guidelines

If no process ID is specified, this command restarts route redistribution for all OSPF processes.

Examples

# Restart route redistribution.

<Sysname> reset ospf redistribution

rfc1583 compatible

Use rfc1583 compatible to enable compatibility with RFC 1583.

Use undo rfc1583 compatible to disable compatibility with RFC 1583.

Syntax

rfc1583 compatible

undo rfc1583 compatible

Default

Compatibility with RFC 1583 is enabled.

Views

OSPF view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

RFC 1583 specifies a different method than RFC 2328 for selecting the best route from multiple AS external routes destined for the same network. Using this command makes 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

Use router id to configure a global router ID.

Use undo router id to restore the default.

Syntax

router id router-id

undo router id

Default

No global router ID is configured.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

router-id: Specifies the router ID, in the format of an IPv4 address.

Usage guidelines

OSPF uses a router ID to identify a device. If no router ID is specified, the global router ID is used.

If no global router ID is configured, the highest loopback interface IP address 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 (up or down).

During an active/standby switchover, the new active main processing unit (MPU) checks whether the previously backed up router ID is valid. If not, it selects a new router ID.

A new router ID is selected only when the interface IP address used as the router ID is removed or changed. Other events will not trigger a router ID re-selection. For example, router ID re-selection is not triggered when the interface goes down, you change the router ID to the address of a loopback interface after a physical interface address is selected as the router ID, or a higher interface IP address is configured as the router ID.

After a router ID is changed, you must use the reset command to enable it.

Examples

# Configure a global router ID as 1.1.1.1.

<Sysname> system-view

[Sysname] router id 1.1.1.1

silent-interface (OSPF view)

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

Use undo silent-interface to remove the configuration.

Syntax

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

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

Default

An interface can send and receive OSPF packets.

Views

OSPF view

Predefined user roles

network-admin

mdc-admin

Parameters

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

all: Specifies all interfaces.

Usage guidelines

A disabled interface is a passive interface that cannot send or receive any hello packets.

To disable a network from receiving OSPF routes, issue the command on the interface connected to the network.

Examples

# Disable VLAN-interface 10 from sending and receiving OSPF packets.

<Sysname> system-view

[Sysname] ospf 100

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

snmp-agent trap enable ospf

Use snmp-agent trap enable ospf to enable the sending of SNMP traps for a specific OSPF process.

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

Syntax

Default

OSPF trap sending is enabled.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

authentication-failure: Specifies traps about authentication failures on an interface.

bad-packet: Specifies traps about error messages received on an interface.

config-error: Specifies traps about error configuration of an interface.

grhelper-status-change: Specifies traps about GR Helper state change.

grrestarter-status-change: Specifies traps about GR Restarter state change.

if-state-change: Specifies traps about interface state change.

lsa-maxage: Specifies LSA max age traps.

lsa-originate: Specifies traps about locally generated LSAs.

lsdb-approaching-overflow: Specifies traps about approaching LSDB overflows.

lsdb-overflow: Specifies LSDB overflow traps.

neighbor-state-change: Specifies traps about neighbor state change.

nssatranslator-status-change: Specifies traps about NSSA translator state change.

retransmit: Specifies traps about packets that are received and forwarded on an interface.

virt-authentication-failure: Specifies traps about authentication failures on a virtual interface.

virt-bad-packet: Specifies traps about error messages received on a virtual interface.

virt-config-error: Specifies traps about error configuration of a virtual interface.

virt-retransmit: Specifies traps about packets that are received and forwarded on a virtual interface.

virtgrhelper-status-change: Specifies traps about neighbor GR Helper state changes of a virtual interface.

virtif-state-change: Specifies traps about virtual interface state change.

virtneighbor-state-change: Specifies traps about the neighbor state change of a virtual interface.

Examples

# Enable OSPF to send SNMP traps about authentication failures on an interface.

<Sysname> system-view

[Sysname] snmp-agent trap enable ospf authentication-failure

snmp trap rate-limit

Use snmp trap rate-limit to configure the number of output traps in a specific time.

Use undo snmp trap rate-limit to restore the default.

Syntax

snmp trap rate-limit interval trap-interval count trap-number

undo snmp trap rate-limit

Default

OSPF outputs 7 traps in 10 seconds.

Views

OSPF view

Predefined user roles

network-admin

mdc-admin

Parameters

trap-interval: Specifies the trap output interval in the range of 1 to 60 seconds.

trap-number: Specifies the number of output traps in a specific time, in the range of 0 to 300.

Examples

# Configure OSPF to output 10 traps in 5 seconds.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] snmp trap rate-limit interval 5 count 10

spf-schedule-interval

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

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

Syntax

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

undo spf-schedule-interval

Default

The maximum calculation interval is 5 seconds, the minimum interval is 50 milliseconds, and the incremental interval is 200 milliseconds.

Views

OSPF view

Predefined user roles

network-admin

mdc-admin

Parameters

maximum-interval: Specifies the maximum OSPF SPF calculation interval in the range of 1 to 60 seconds.

minimum-interval: Specifies the minimum OSPF SPF calculation interval in the range of 10 to 60000 milliseconds.

incremental-interval: Specifies the incremental OSPF SPF calculation interval in the range of 10 to 60000 milliseconds.

Usage guidelines

Based on the LSDB, an OSPF router uses SPF to calculate a shortest path tree with itself as the root. OSPF uses the shortest path tree to determine the next hop to a destination. By adjusting the SPF calculation interval, you can prevent bandwidth and router resources from being over-consumed due to frequent topology changes.

When network changes are not frequent, OSPF performs SPF calculations at the minimum-interval. If network changes become frequent, the SPF calculation interval is incremented by the incremental-interval each time a calculation happens until the maximum-interval is reached.

The minimum interval and the incremental interval cannot be greater than the maximum interval.

Examples

# Configure the maximum SPF calculation interval as 10 seconds, minimum interval as 500 milliseconds and incremental interval as 300 milliseconds.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] spf-schedule-interval 10 500 300

stub (OSPF area view)

Use stub to configure an area as a stub area.

Use undo stub to restore the default.

Syntax

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

undo stub

Default

No area is a stub area.

Views

OSPF area view

Predefined user roles

network-admin

mdc-admin

Parameters

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 Type-3 LSA into the stub area only when at least one FULL-state neighbor exists in the backbone area.

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 without advertising any other Type-3 LSAs (such a stub area is a totally stub area).

Usage guidelines

To remove the default-route-advertise-always or stub no-summary configuration on the ABR, execute the stub command again to overwrite it.

To configure an area as a stub area, issue the stub command on all routers attached to the area.

Examples

# Configure Area 1 as a stub area.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] area 1

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

Related commands

default-cost

stub-router

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

Use undo stub-router to restore the default.

Syntax

stub-router

undo stub-router

Default

No router is a stub router.

Views

OSPF view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

The router LSAs sent by the stub router over different links contain different link type values. A value of 3 represents a link to a stub network, and the cost of the link is not changed. A value of 1, 2, or 4 represents a point-to-point link, a link to a transit network, or a virtual link, and the cost of such links is set to 65535. Neighbors on such links will not send packets to the stub router as long as they have a route with a smaller cost.

Examples

# Configure a stub router.

<Sysname> system-view

[Sysname] ospf 100

[Sysname-ospf-100] stub-router

transmit-pacing

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

Use undo transmit-pacing to restore the default.

Syntax

transmit-pacing interval interval count count

undo transmit-pacing

Default

An OSPF interface sends up to three LSU packets every 20 milliseconds.

Views

OSPF view

Predefined user roles

network-admin

mdc-admin

Parameters

interval interval: Specifies an interval at which an interface sends LSU packets, in the range of 10 to 1000 milliseconds. If the router has multiple OSPF interfaces, increase this interval to reduce the total number of LSU packets sent by the router every second.

count count: Specifies the maximum number of LSU packets sent by an interface at each interval, in the range of 1 to 200. If the router has multiple OSPF interfaces, decrease the maximum number to reduce the total number of LSU packets sent by the router every second.

Examples

# Configure all the interfaces running 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)

Use vlink-peer to configure a virtual link.

Use undo vlink-peer to remove a virtual link.

Syntax

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

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

Default

No virtual link is configured.

Views

OSPF area view

Predefined user roles

network-admin

mdc-admin

Parameters

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

hello seconds: Sets the hello interval in the range of 1 to 8192 seconds. The default is 10. It must be identical with the hello interval on the virtual link neighbor.

retransmit seconds: Sets the retransmission interval in the range of 1 to 3600 seconds. The default is 5.

trans-delay seconds: Sets the transmission delay interval in the range of 1 to 3600 seconds. The default is 1.

dead seconds: Sets the dead interval in the range of 1 to 32768 seconds. The default is 40. It must be identical with that on the virtual link neighbor. The dead interval is at least four times the hello interval.

md5: Enables MD5 authentication.

hmac-md5: Enables HMAC-MD5 authentication.

simple: Enables simple authentication.

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

cipher: Sets a ciphertext key.

cipher-string: Specifies a ciphertext key. For simple authentication, specify a key of 33 to 41 characters. For MD5/HMAC-MD5 authentication, specify a key of 33 to 53 characters.

plain: Sets a plaintext key.

plain-string: Specifies a plaintext key. For simple authentication, specify a key of 1 to 8 characters. For MD5/HMAC-MD5 authentication, specify a key of 1 to 61 characters.

Usage guidelines

As defined in RFC 2328, 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.

When you configure this command, follow these guidelines:

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

· A retransmission interval that is too small can cause unnecessary retransmissions. A large value is appropriate for a low speed link.

· Specify an appropriate transmission delay with the trans-delay keyword.

The authentication mode at the non-backbone virtual link end is determined by the authentication mode at the backbone virtual link end. The two authentication modes (MD5 or simple) are independent, and you cannot specify either mode.

For secrecy, all keys, including keys configured in plain text, are saved in cipher text.

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

Related commands

· authentication-mode

· display ospf vlink

06-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)

fast-reroute (OSPF view)

filter (OSPF area view)

filter-policy export (OSPF view)

filter-policy import (OSPF view)

graceful-restart helper strict-lsa-checking

import-route (OSPF view)

maximum load-balancing (OSPF view)

maximum-routes

network (OSPF area view)

reset ospf redistribution

silent-interface (OSPF view)

stub (OSPF area view)

vlink-peer (OSPF area view)

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