Configures fast leave for IGMP V2.

multicast fast-leave-v2
no multicast fast-leave-v2

Fast leave for IGMP V2 is not configured.

VLAN configuration mode

The no form of this command restores the default; fast leave for IGMP V2 is not configured.

When a device receives an IGMP V2 leave message, it sends out multiple group-specific queries. If no other client replies within the waiting period, the device stops forwarding traffic. When the multicast fast-leave-v2 command is configured, and when the device receives a leave message, it immediately stops forwarding to that port. The device does not send group specific-queries. When the multicast fast-leave-v2 command is configured on a VLAN, you must not have multiple clients on any port that is part of the VLAN.

In a scenario where two devices connect, the querier device should not be configured for fast-leave-v2 because the port might have multiple clients through the non-querier.

You can configure the ip multicast leave-wait-time command to set the number of queries and the waiting period.

This example configures fast leave for IGMP on VLAN 10.

Device(config)#vlan 10
Device(config-vlan-10)#multicast fast-leave-v2