if-match ip group-address

Function

The if-match ip group-address command configures a filtering rule that is based on multicast group addresses.

The undo if-match ip group-address command cancels the configuration.

By default, no filtering rule based on multicast group addresses is configured.

Format

if-match ip group-address acl { acl-number | acl-name }

if-match ip group-address ip-prefix ip-prefix-name

undo if-match ip group-address acl { acl-number | acl-name }

undo if-match ip group-address [ ip-prefix ip-prefix-name ]

Parameters

Parameter	Description	Value
acl-number	Specifies the number of a basic ACL.	The value is an integer that ranges from 2000 to 2999.
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).
ip-prefix ip-prefix-name	Specifies the name of the IP prefix list.	The name is a string of 1 to 169 case-sensitive characters, with spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string.
acl	Specifies the ACL for route filtering.	-

Views

Route-policy view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
route-base	write

Usage Guidelines

Usage Scenario

The if-match ip command is widely applied. The filtering rule configured using this command takes effect only after an IP prefix or an ACL is configured. For example:

If the if-match ip next-hop ip-prefix aa command is used but the IP prefix aa is not configured, all routes are permitted. This is the same case when the ACL is used.
If the if-match ip next-hop ip-prefix aa command is used after the ip ip-prefix aa permit 1.1.1.1 32 command is used, the routes with the next hop address 1.1.1.1 are permitted. This is the same case when the ACL is used.

Prerequisites

A route-policy has been configured using the route-policy command.

An ACL has been configured using the acl command or an IP prefix has been configured using the ip ip-prefix command.

Configuration Impact

When you filter routes based on the multicast group address, the routes that match the filtering rule are permitted and the route that do not match the filtering rule are denied.

Precautions

The if-match ip group-address command takes effect only when a policy is applied to the BGP-MDT address family.

Example

# Define a rule to match the routes with the next hop address in the IP prefix list named p1.

<HUAWEI> system-view
[~HUAWEI] ip ip-prefix p1 permit 10.0.192.0 8 greater-equal 17 less-equal 18
[*HUAWEI] route-policy policy permit node 10
[*HUAWEI-route-policy] if-match ip group-address ip-prefix p1