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Configuration Guide - IP Multicast

CloudEngine 8800, 7800, 6800, and 5800 V200R005C10

This document describes the configurations of IP multicast, including IP multicast basics, IGMP, MLD, PIM (IPv4), PIM (IPv6), MSDP, multicast VPN, multicast route management (IPv4), multicast route management (IPv6), IGMP snooping, MLD snooping, static multicast MAC address, multicast VLAN, multicast network management.
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Setting the Aging Time of Group Member Ports

Setting the Aging Time of Group Member Ports

Context

The switch determines the aging time of a group member port depending on the IGMP message 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 the 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 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 igmp snooping query interval query-interval

    The IGMP snooping general query interval is configured.

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

  4. Run igmp snooping robust-count robust-count

    The IGMP snooping robustness variable is configured.

    By default, the IGMP snooping robustness variable is 2.

  5. Run igmp snooping query 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 query last-member-interval last-member-interval

    The IGMP snooping last member query interval is configured.

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

  7. Run commit

    The configuration is committed.

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Updated: 2019-04-20

Document ID: EDOC1100075361

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