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S600-E V200R012C00 Configuration Guide - IP Multicast

This document describes the configurations of IP multicast, including IGMP snooping, MLD snooping, static multicast MAC address, multicast VLAN replication, controllable multicast, multicast network management.
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Setting the Aging Time of Group Member Ports

Setting the Aging Time of Group Member Ports

Context

A switch sets the aging time of a member port based on MLD message received:
  • When the member port receives a Report message from a downstream host, the switch sets the aging time to: Robustness variable x General Query interval + Maximum response time for General Query messages.

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

When deploying a Layer 2 multicast network, ensure that all Layer 2 multicast devices use the same parameter values to calculate the aging time of dynamic group member ports. In particular, ensure that the MLD snooping general query interval is consistent. Varying parameters will result in errors 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 125 seconds.

    NOTE:

    The default general query interval defined in RFC documents is 125 seconds, but some vendors define their own default general query intervals. It is recommended that all devices on a multicast network use the same general query intervals (including MLD and MLD snooping general query intervals).

  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: 2018-09-01

Document ID: EDOC1100037948

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