Enable IGS as a Querier

By configuring the IGS switch as a querier, the switch starts sending general queries at regular time intervals. The querier message sent by the switch does not take part in querier election. If the switch receives a query from any other router, the switch stops acting as a querier.

1. Enter the configure mode for the VLAN.

   SEFOS# configure terminal
   SEFOS(config)# vlan 4
   

2. Enable the switch as the IGS querier.

   SEFOS(config-vlan)# ip igmp snooping querier
   SEFOS(config-vlan)# end
   SEFOS#
   

   The switch sends general queries on the member ports of VLAN 4 every 125 seconds.

3. Review the configuration.

   SEFOS# show ip igmp snooping vlan 4
    
   Snooping VLAN Configuration for the VLAN 4
     IGMP Snooping enabled
     IGMP configured version is V3
     Fast leave is disabled
     Snooping switch is configured as Querier
     Snooping switch is acting as Querier
     Query interval is 125 seconds
     Port Purge Interval is 260 seconds
     Max Response Code is 100, Time is 10 seconds