multicast fast-leave-v2
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- Last UpdatedAug 13, 2021
- 1 minute read
Configures fast leave for IGMP 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