IGMP Snooping Commands 195
Command Mode
Interface Configuration (VLAN) mode.
User Guidelines
• The leave timeout should be set greater than the maximum time that a host is allowed to respond to
an IGMP query.
•Use
immediate leave
only where there is just one host connected to a port.
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
Disabled.
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 than 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 would disable itself if it detects IGMP traffic from a Multicast router. It
would restart itself after host-time-out/2.
Console(config)# interface vlan 2
Console(config-if)# ip igmp snooping leave-time-out 60
book.book Page 195 Thursday, December 18, 2008 7:40 PM
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