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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 group member port based on IGMP messages received on the member port:
  • 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.

  • When the member port receives a Leave 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, especially the IGMP snooping general query interval. Otherwise, errors will 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 igmp-snooping query-interval query-interval

    The IGMP snooping general query interval is set.

    By default, the IGMP 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 IGMP and IGMP snooping general query intervals).

  4. Run igmp-snooping robust-count robust-count

    The IGMP snooping robustness variable is set.

    By default, the IGMP snooping robustness variable is 2.

  5. Run igmp-snooping max-response-time max-response-time

    The IGMP snooping maximum response time is set.

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

  6. Run igmp-snooping lastmember-queryinterval lastmember-queryinterval

    The IGMP snooping last member query interval is set.

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

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Updated: 2018-09-01

Document ID: EDOC1100037948

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