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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 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. 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.

    The mode switching function takes effect when the interface only has attribute configurations (for example, shutdown and description configurations). Alternatively, if configuration information supported by both Layer 2 and Layer 3 interfaces exists (for example, mode lacp and lacp system-id configurations), no configuration that is not supported after the working mode of the interface is switched can exist. If unsupported configurations exist on the interface, delete the configurations first and then run the undo portswitch command.

    NOTE:

    If many Ethernet interfaces need to be switched to Layer 3 mode, run the undo portswitch batch interface-type { interface-number1 [ to interface-number2 ] } &<1-10> command in the system view to switch these interfaces to Layer 3 mode in batches.

  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.

  5. Run commit

    The configuration is committed.

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Updated: 2019-04-20

Document ID: EDOC1100075361

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