LevelOne FGL-2870 - Manual (Page 744)

Command Line Interface
4-378
4
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
query-max-response-time (see 4-381).
• 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.
show ip igmp snooping
This command shows the IGMP snooping and query configuration.
Default Setting
None
Command Mode
Privileged Exec
Command Usage
See "Configuring IGMP Snooping and Query Parameters" on page 3-276 for a
description of the displayed items.
Example
The following shows the current IGMP snooping configuration:
Console(config)#interface vlan 1
Console(config-if)#ip igmp snooping immediate-leave
Console(config-if)#
Console#show ip igmp snooping
Service status: Enabled
Querier status: Enabled
Leave proxy status: Disabled
Query count: 10
Query interval: 100 sec
Query max response time: 20 sec
Router port expire time: 300 sec
Immediate Leave Processing: Disabled on all VLAN
IGMP snooping version: Version 2
Console#