Quick Reference Guide

IGMP Snooping Commands 211
DELL CONFIDENTIAL – PRELIMINARY 5/15/12 – FOR PROOF ONLY
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.
• Following are the IGMP Snooping Querier parameters as function of the IGMP Snooping
parameters:
• QueryMaxResponseTime: host-time-out/15.
• QueryInterval: host-time-out/ 3.
Console(config)# interface vlan 2
Console(config-if)# ip igmp snooping leave-time-out 60