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Configuration Guide - IP Multicast

S7700 and S9700 V200R010C00

This document describes IP multicast basics and how to configure IP multicast features, including IGMP/MLD, PIM (IPv4&IPv6), MSDP, multicast VPN, Layer 3 multicast CAC, Layer 2 multicast CAC, IGMP/MLD snooping, and multicast VLAN, IPv4&IPv6 multicast route management, static multicast MAC address, multicast network.
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Configuring the MLD Version

Configuring the MLD Version

Context

A multicast switch can identify Multicast Listener Discovery (MLD) messages of a version earlier than its own MLD version but cannot identify MLD messages of a later version. To ensure normal MLD operation, ensure that the switch runs the same MLD version as receiver hosts or a later MLD version.

If there are multiple multicast switches on a shared network segment of hosts, all host-side interfaces of these multicast switches must run the same MLD version. If they are running different MLD versions, MLD cannot function normally on the network.

Procedure

  1. Run:

    system-view

    The system view is displayed.

  2. Run:

    interface interface-type interface-number

    The interface view is displayed.

  3. (Optional) On an Ethernet interface, run undo portswitch

    The interface is switched to Layer 3 mode.

    By default, an Ethernet interface works in Layer 2 mode.

  4. Run:

    mld version { 1 | 2 }

    The MLD version is specified for the interface.

    By default, an interface runs MLDv2 after MLD is enabled on the interface.

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Updated: 2019-08-21

Document ID: EDOC1000141903

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