peer sa-request-policy

Function

The peer sa-request-policy command configures the filtering policy to respond to the SA Request messages sent by a specified MSDP peer. Once the SA Request message passes the filtering, the switch responds to the SA message immediately.

The undo peer sa-request-policy command restores the default configuration.

By default, the switch responds to all SA request messages sent by all MSDP peers.

Format

peer peer-address sa-request-policy [ acl basic-acl-number ]

undo peer peer-address sa-request-policy

Parameters

Parameter	Description	Value
peer-address	Specifies the address of MSDP peer that sends the SA Request message.	The address is in dotted decimal notation.
acl	Indicates an ACL. If the ACL is not specified, all SA Requests messages of the MSDP peer are ignored. If the ACL is specified, only the SA Request messages of the group that meets the requirements of the ACL are processed.	-
basic-acl-number	Indicates the number of the basic ACL.	The number is an integer that ranges from 2000 to 2999.

Parameter

Description

Value

peer-address

Specifies the address of MSDP peer that sends the SA Request message.

The address is in dotted decimal notation.

acl

Indicates an ACL.

If the ACL is not specified, all SA Requests messages of the MSDP peer are ignored. If the ACL is specified, only the SA Request messages of the group that meets the requirements of the ACL are processed.

basic-acl-number

Indicates the number of the basic ACL.

The number is an integer that ranges from 2000 to 2999.

Views

MSDP view of the public network instance or MSDP view of the VPN instance

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

When a local MSDP peer receives SA Request messages, the MSDP peer responds to all SA Request messages by default. To configure the switch to respond only to certain SA Request messages, configure the peer sa-request-policy command.

Prerequisites

MSDP peers have been configured using the peer connect-interface (MSDP) command.

Precautions

The peer sa-request-policy and acl commands are used together.

In the basic ACL view, you can set the multicast group address range of SA messages that are forwarded by the MSDP peer by specifying the source parameter in the rule command.

Example

# Configure the ACL for filtering SA request messages sent by the MSDP peer 10.58.6.5: only SA request messages bound for the group whose address is 225.1.1.0/24 are received.

<HUAWEI> system-view
[HUAWEI] acl number 2001
[HUAWEI-acl-basic-2001] rule permit source 225.1.1.0 0.0.0.255
[HUAWEI-acl-basic-2001] quit
[HUAWEI] multicast routing-enable
[HUAWEI] msdp
[HUAWEI-msdp] peer 10.58.6.5 connect-interface vlanif 100 
[HUAWEI-msdp] peer 10.58.6.5 sa-request-policy acl 2001