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CLI-based Configuration Guide - IP Multicast

AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 V200R007

This document describes the principles and configurations of IP multicast, and provides configuration examples.
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Filtering MLD Messages Based on Source IPv6 Addresses

Filtering MLD Messages Based on Source IPv6 Addresses

Context

MLD runs between member hosts and the Layer 3 multicast device that is directly connected to the host network segment. A multicast device processes all received Report messages. To improve security and prevent multicast services from being affected by MLD messages maliciously forged by other devices, you can configure the router to filter Multicast Listener Discovery (MLD) messages received on an interface. Messages that can be filtered include MLD Query messages, MLD Report and Done messages.

Before configuring MLD messages filtering based on source IPv6 addresses, configure an IPv6 access control list (ACL6) to define the range of source IPv6 addresses for packet filtering. For details about the ACL6 configuration, see "ACL Configuration" in the Huawei AR Series Access Routers Configuration Guide - Security.

Procedure

  1. Run:

    system-view

    The system view is displayed.

  2. Run:

    interface interface-type interface-number

    The interface view is displayed.

  3. Run:

    mld query ip-source-policy { basic-acl6-number | acl6-name acl6-name }

    A policy is configured to filter MLD Query messages.

    By default, the router does not filter Query messages and processes all the received Query messages.

    NOTE:

    When configuring an ACL6 rule for the interface, use the permit parameter to configure the interface to accept only Query messages with source addresses in a specified range. If no rule is configured in the ACL6, the interface discards Query messages from all source addresses.

  4. Run:

    mld ip-source-policy { basic-acl6-number | acl6-name acl6-name }

    A policy is configured to filter Report/Done messages.

    By default, the router does not filter Report/Done messages and processes all the received Report/Done messages.

    NOTE:

    When configuring an ACL6 rule for the interface, use the permit parameter to configure the interface to accept only Report and Done messages with source addresses in a specified range. If no rule is configured in the ACL6, the interface discards Report and Done messages from all source addresses.

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Updated: 2019-06-12

Document ID: EDOC1000097181

Views: 21522

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