IGMP Snooping Commands 199
Example
The following example configures the host leave-time-out to 60 seconds.
ip igmp snooping querier enable
The ip igmp snooping querier enable Interface Configuration mode command enables Internet Group
Management Protocol (IGMP) querier on a specific VLAN. Use the no form of this command to disable
IGMP querier on a VLAN interface.
Syntax
• ip igmp snooping querier enable
• no ip igmp snooping querier enable
Default Configuration
IGMP querier is d
isabled.
Command Mode
Interface Configuration (VLAN) mode.
User Guidelines
• IGMP snooping querier can be enabled on a VLAN only if IGMP snooping is enabled for that VLAN.
No more then one switch can be configured as an IGMP Querier for a VLAN.
When IGMP Snooping Querier is enabled, it starts after host-time-out/2 with no IGMP traffic
detected from a Multicast router.
The IGMP Snooping Querier disables itself if it detects IGMP traffic from a Multicast router.
It
restarts itself after host-time-out/2.
Following are the IGMP Snooping Querier parameters as function of the IGMP Snooping parameters:
• QueryMaxResponseTime: host-time-out/15.
• QueryInterval: host-time-out/ 3.
Example
The following example enables IGMP querier on a specific VLAN.
Console (config)# interface vlan 2
Console (config-if)# ip igmp snooping leave-time-out 60
Console (config)#
ip igmp snooping querier enable
5400_CLI.book Page 199 Wednesday, December 17, 2008 4:33 PM
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