filter-lsa-out peer

Function

The filter-lsa-out peer command configures a device to filter the LSAs to be sent to the specified neighbor on a P2MP network.

The undo filter-lsa-out peer command cancels the configuration.

By default, the LSAs that are to be sent to the specified neighbor on a P2MP network are not filtered.

Format

filter-lsa-out peer peer-addr { all | { ase [ acl { ase-acl-num | ase-acl-name } ] | nssa [ acl { nssa-acl-num | nssa-acl-name } ] | summary [ acl { sum-acl-num | sum-acl-name } ] } ^* }

undo filter-lsa-out peer peer-addr

Parameters

Parameter	Description	Value
peer-addr	Specifies the IP address of a P2MP neighbor.	The value is in dotted decimal notation.
all	Filters all the outgoing LSAs except Grace LSAs.	-
ase	Filters outgoing AS external LSAs (Type 5).	-
acl sum-acl-num	Specifies the number of a basic ACL.	The value is an integer that ranges from 2000 to 2999.
acl sum-acl-name	Specifies the name of a named basic ACL.	The value is a string of 1 to 64 case-sensitive characters without spaces. The value must start with a letter (a to z or A to Z, case sensitive).
acl ase-acl-num	Specifies the number of a basic ACL.	The value is an integer that ranges from 2000 to 2999.
acl ase-acl-name	Specifies the name of a named basic ACL.	The value is a string of 1 to 64 case-sensitive characters without spaces. The value must start with a letter (a to z or A to Z, case sensitive).
acl nssa-acl-num	Specifies the number of a basic ACL.	The value is an integer that ranges from 2000 to 2999.
acl nssa-acl-name	Specifies the name of a named basic ACL.	The value is a string of 1 to 64 case-sensitive characters without spaces. The value must start with a letter (a to z or A to Z, case sensitive).
nssa	Filters outgoing NSSA LSAs (Type 7).	-
summary	Filters outgoing network summary LSAs (Type 3).	-

Views

OSPF view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
ospf	write

Usage Guidelines

Usage Scenario

On a P2MP network, when multiple P2MP links exist between two devices, you can configure the local router to filter the outgoing LSAs on the specified link. This can reduce unnecessary LSA retransmission attempts and save bandwidth resources.

For a named ACL, configure filtering rules, only the source address range that is specified by the source parameter and the period of time that is specified by the time-range parameter take effect.

Prerequisites

The network type has been changed to P2MP using the ospf network-type p2mp command.

Precautions

Configure a router to filter the outgoing LSAs on the specified OSPF interface, run the ospf filter-lsa-out command.

After the filter-lsa-out peer command is run, the LSAs that other devices have received before will not be deleted immediately, but it will be deleted after a period of time (usually no more than one hour).

Example

# On a P2MP network, configure a device to filter all the LSAs (except Grace LSAs) sent to neighbor 10.1.1.1.

<HUAWEI> system-view
[~HUAWEI] ospf 1
[*HUAWEI-ospf-1] filter-lsa-out peer 10.1.1.1 all