peer as-path-filter import (BGP-IPv4 multicast address family view)

Function

The peer as-path-filter import command configures a policy based on an AS_Path list for filtering BGP routes received from a peer.

The undo peer as-path-filter import command cancels this configuration.

By default, no policy based on an AS_Path list is configured for filtering BGP routes received from a peer, and all the BGP routes will be received from the peer.

Format

peer peerIpv4Addr as-path-filter { number | name } import

undo peer peerIpv4Addr as-path-filter { number | name } import

Parameters

Parameter	Description	Value
peerIpv4Addr	Specifies the IP address of an MBGP peer.	The value is in dotted decimal notation.
number	Specifies the number of an AS_Path filter.	The value is an integer ranging from 1 to 256.
name	Specifies the name of an AS_Path filter.	The value is a string of 1 to 51 case-sensitive characters, spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string.

Parameter

Description

Value

peerIpv4Addr

Specifies the IP address of an MBGP peer.

The value is in dotted decimal notation.

number

Specifies the number of an AS_Path filter.

The value is an integer ranging from 1 to 256.

name

Specifies the name of an AS_Path filter.

The value is a string of 1 to 51 case-sensitive characters, spaces not supported.

When double quotation marks are used around the string, spaces are allowed in the string.

Views

BGP-IPv4 multicast address family view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
bgp	write

Usage Guidelines

Usage Scenario

After the peer as-path-filter import command is used to apply a route filtering policy based on an AS_Path list to BGP routes to be received from a specified peer, the routers that do not match the policy are filtered out.

Prerequisites

The ip as-path-filter command has been run to define an AS-Path filter.

Precautions

Only one AS_Path filter can be used to filter routes to be received from the same peer.

The peer as-path-filter import command is mutually exclusive with the peer route-filter import commands.

Example

# Configure an MBGP routing policy based on an AS_Path list for a peer.

<HUAWEI> system-view
[~HUAWEI] ip as-path-filter 3 permit 1
[*HUAWEI] bgp 100
[*HUAWEI-bgp] peer 1.1.1.1 as-number 10
[*HUAWEI-bgp] ipv4-family multicast
[*HUAWEI-bgp-af-multicast] peer 1.1.1.1 enable
[*HUAWEI-bgp-af-multicast] peer 1.1.1.1 as-path-filter 3 import