The mld-snooping send-query enable command enables the switch to send MLD General Query messages to non-router ports when receiving Layer 2 topology change events.
The undo mld-snooping send-query enable command disables the switch from sending MLD General Query messages when receiving Layer 2 topology change events.
By default, the switch does not send MLD General Query messages when receiving Layer 2 topology change events.
Usage Scenario
When the network topology changes, the switch receives a topology change event. By default, the switch does not send MLD General Query messages in this case. The network topology change triggers recalculation of the ring network protocol used (such as STP, MSTP, RRPP, SEP, and Smart Link). If the switch cannot respond to the topology change immediately, multicast data traffic cannot be switched to the new path in a timely manner. The mld-snooping send-query enable command enables the switch to send MLD General Query messages to update group memberships when the network topology changes. This ensures that multicast data traffic can be switched to the new transmission path.
Prerequisites
MLD snooping has been enabled globally using the mld-snooping enable command.
Follow-up Procedure
This command is used on a ring network. When the ring network topology changes, the switch sends MLD General Query messages with source IPv6 address FE80::0. When this address has been occupied by another device on the network, run the mld-snooping send-query source-address command to set the source IPv6 address to FE80::.
Precautions
Use this command only when a ring network protocol is enabled on the switch.