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

Run system-view
The system view is displayed.
Run interface interface-type interface-number
The interface view is displayed.
(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.

Only the S5720-EI, S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-EI, S6720-HI, S6720S-EI, S6730-H, S6730S-H, S6730-S, and S6730S-S support switching between Layer 2 and Layer 3 modes.
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.