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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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(Optional) Suppressing Report and Leave Messages

(Optional) Suppressing Report and Leave Messages

Context

IGMP periodically sends Query and Response messages to maintain group memberships. When multiple members join the same multicast group, they send a large number of duplicate Report message to the IGMP router. When IGMPv2 or IGMPv3 hosts leave a multicast group, they send a large number of duplicate Leave message. To conserve bandwidth, configure suppression of Report and Leave messages on the Layer 2 device.

After message suppression is configured, the router forwards a Report message only when the first member joins a multicast group or when it receives an IGMP Query message. and a Leave message only when the last member leaves the multicast group.

Procedure

  1. Run:

    system-view

    The system view is displayed.

  2. Run:

    vlan vlan-id

    The VLAN view is displayed.

  3. Run:

    igmp-snooping report-suppress

    The Report and Leave messages are suppressed.

    NOTE:

    When configuring message suppression, pay attention to the following points:

    • After message suppression is configured in a VLAN, Layer 3 multicast functions (such as IGMP and PIM) cannot be enabled on the corresponding VLANIF interface.
    • The device can suppress duplicate IGMPv1 or IGMPv2 Report messages even when IGMP message suppression is disabled. The default suppression time is 10 seconds. To change the suppression time, run the igmp-snooping suppress-time suppress-time command. If the suppress-time is set to 0, all the membership packets are forwarded immediately.

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Updated: 2019-06-12

Document ID: EDOC1000097181

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