Cisco Systems 3560 Manual De Usuario

Immediate Leave is supported only on IGMP Version 2 hosts.

Beginning in privileged EXEC mode, follow these steps to enable IGMP Immediate Leave:

To disable IGMP Immediate Leave on a VLAN, use the no ip igmp snooping vlan vlan-id 
immediate-leave global configuration command.

This example shows how to enable IGMP Immediate Leave on VLAN 130:

Switch# configure terminal

Switch(config)# ip igmp snooping vlan 130 immediate-leave

Switch(config)# end

Follows these guidelines when configuring the IGMP leave timer:

You can configure the leave time globally or on a per-VLAN basis. 

Configuring the leave time on a VLAN overrides the global setting. 

The default leave time is 1000 milliseconds.

The IGMP configurable leave time is only supported on hosts running IGMP Version 2.

The actual leave latency in the network is usually the configured leave time. However, the leave 
time might vary around the configured time, depending on real-time CPU load conditions, network 
delays and the amount of traffic sent through the interface.

Beginning in privileged EXEC mode, follow these steps to enable the IGMP configurable-leave timer:

Enter global configuration mode.

ip igmp snooping vlan vlan-id 
immediate-leave

Enable IGMP Immediate Leave on the VLAN interface.

Return to privileged EXEC mode.

show ip igmp snooping vlan vlan-id

Verify that Immediate Leave is enabled on the VLAN interface.

(Optional) Save your entries in the configuration file.

Enter global configuration mode.

ip igmp snooping 
last-member-query-interval time

Configure the IGMP leave timer globally. The range is 100 to 
32768 milliseconds. The default is 1000 seconds.

ip igmp snooping vlan vlan-id 
last-member-query-interval time

(Optional) Configure the IGMP leave time on the VLAN interface. The 
range is 100 to 32768 milliseconds. 

Configuring the leave time on a VLAN overrides the globally 
configured timer.

Return to privileged EXEC mode.