SMC Networks TigerAccess SMC7816M - Manual (Page 881)

IGMP S
NOOPING
C
OMMANDS
35-5
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
ip igmp snooping immediate-leave
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 the ip
igmp snooping query-max-response-time (see page 35-10).
• If immediate-leave is enabled, the switch assumes that only one host
is connected to the interface. Therefore, immediate leave should only
be enabled on an interface if it is connected to only one
IGMP-enabled device, either a service host or a neighbor running
IGMP snooping.
• This command is only effective if IGMP snooping is enabled, and
IGMPv2 or IGMPv3 snooping is used.
Example
The following shows how to enable immediate leave.
Console(config)#interface vlan 1
Console(config-if)#ip igmp snooping immediate-leave
Console(config-if)#