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CLI-based Configuration Guide - IP Multicast

AR100, AR120, AR160, AR1200, AR2200, AR3200, and AR3600 V300R003

This document provides the basic concepts, configuration procedures, and configuration examples of the interfaces supported by the device.
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(Optional) Configuring the Router-Alert Option

(Optional) Configuring the Router-Alert Option

Context

By default, the router does not check whether Multicast Listener Discovery (MLD) packets contain the Router-Alert option and sends all the MLD packets to the upper-layer routing protocol no matter whether the packets contain the Router-Alert option. Checking the Router-Alert option can improve system performance, reduce route costs, and increase network security. When the received MLD packets do not contain the Router-Alert option, the router discards the packets.

By default, the router sends MLD packets with the Router-Alert option.

For details about the Router-Alert option, see RFC 2113.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run vlan vlan-id

    The VLAN view is displayed.

  3. Run mld-snooping require-router-alert

    The router is configured to check the Router-Alert option in MLD packets.

  4. Run mld-snooping send-router-alert

    The Router-Alert option is added to the MLD packets sent by the router.

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Updated: 2019-03-06

Document ID: EDOC1100069332

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