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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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Configuring the Aging Time of a Dynamic Member Interface

Configuring the Aging Time of a Dynamic Member Interface

Context

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

  • When the member interface receives a Done message from a downstream host, the switch sets the aging time of the interface to: Robustness variable x Group-specific query interval.

When deploying a Layer 2 multicast network, ensure that all the Layer 2 multicast devices use the same parameter settings to calculate the aging time of dynamic member interfaces, 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

    MLD snooping general query interval is configured.

    By default, the MLD snooping general query interval is 125 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 query max-response-time max-response-time

    The maximum response time for MLD snooping messages is configured.

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

  6. Run mld snooping query last-member-interval query-interval

    MLD snooping group-specific query interval is configured.

    By default, the MLD snooping group-specific 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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