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| Sun Ethernet Fabric Operating System ### IGS Administration Guide

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## 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

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