LevelOne FGL-2870 - Manual (Page 743)

Multicast Filtering Commands
4-377
4
ip igmp snooping leave-proxy
This command enables IGMP leave proxy on the switch. Use the no form to disable
the feature.
Syntax
[no] ip igmp snooping leave-proxy
Default Setting
Disabled
Command Mode
Global Configuration
Command Usage
• This function is only effective if IGMP snooping is enabled.
• The IGMP snooping leave-proxy feature suppresses all unnecessary IGMP
leave messages so that the non-querier switch forwards an IGMP leave
packet only when the last dynamic member port leaves a multicast group.
• The leave-proxy feature does not function when a switch is set as the querier.
• When the switch a non-queier, the receiving port is not the last dynamic
member port in the group, the receiving port is not a router port, and no
IGMPv1 member port exists in the group, the switch will generate and send a
GS-query to the member port which received the leave message, and then
start the last member query timer for that port.
• When the conditions in the preceding item all apply, except that the receiving
port is a router port, then the switch will not send a GS-query, but will
immediately start the last member query timer for that port.
Example
ip igmp snooping immediate-leave
This command immediately deletes a member port of a multicast service if a leave
packet is received at that port and immediate-leave is enabled for the parent VLAN.
Use the no form to restore the default.
Syntax
[no] ip igmp snooping immediate-leave
Default Setting
Disabled
Command Mode
Interface Configuration (VLAN)
Console(config)#ip igmp snooping leave-proxy
Console(config)#