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Multicast Filtering Commands
4-383
4
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
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)
Command Usage
• If immediate-leave is
not
used, a multicast router (or querier) will send a
group-specific query message when an IGMPv2/v3 group leave message is
received. The router/querier stops forwarding traffic for that group only if no
host replies to the query within the specified timeout period. Note that the
timeout period is determined by
ip igmp snooping
Console(config)#ip igmp snooping leave-proxy
Console(config)#
Summary of Contents for 6152PL2 FICHE
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Page 56: ...Initial Configuration 2 10 2 ...
Page 378: ...Configuring the Switch 3 322 3 ...
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