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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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Setting the Aging Time of Group Member Ports

Setting the Aging Time of Group Member Ports

Context

A router sets the aging time of a member port depending on the Multicast Listener Discovery (MLD) message received:
  • When the member port receives a Report message from a downstream host, the device sets the aging time to: Robustness variable x General Query interval + Maximum response time for General Query messages.

  • When the member port receives a Done message from a downstream host, the device sets the aging time to: Last member query interval x Robustness variable.

When deploying a Layer 2 multicast network, ensure that all the Layer 2 multicast devices use the same parameter values to calculate the aging time of dynamic group member ports, especially the MLD snooping general query interval. Otherwise, errors may occur in Layer 2 multicast forwarding.

Procedure

  1. Run:

    system-view

    The system view is displayed.

  2. Run:

    vlan vlan-id

    The VLAN view is displayed.

  3. Run:

    mld-snooping query-interval query-interval

    The MLD snooping general query interval is configured.

    By default, the MLD snooping general query interval is 60 seconds.

  4. Run:

    mld-snooping robust-count robust-count

    The MLD snooping robustness variable is configured.

    By default, the MLD snooping robustness variable is 2.

  5. Run:

    mld-snooping max-response-time max-response-time

    The MLD snooping maximum response time is set.

    By default, the MLD snooping maximum response time is 10 seconds.

  6. Run:

    mld-snooping last-listener-query-interval query-interval

    The MLD snooping last member query interval is configured.

    By default, the MLD snooping last member query interval is 1 second.

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Updated: 2019-06-12

Document ID: EDOC1000097181

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