Enable IGS on a Specific VLAN Interface

When IGS is enabled globally, it is enabled in all of the existing VLAN interfaces. When IGMP snooping is disabled globally, it is disabled in all of the existing VLAN interfaces.

1. Enter the configuration mode for the VLAN interface.

   SEFOS# configure terminal
   SEFOS(config)# vlan 2
   

2. Enable IGS on the interface.

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

3. Review the configuration.

   SEFOS# show ip igmp snooping vlan 2
    
   Snooping VLAN Configuration for the VLAN 2
     IGMP Snooping enabled
     IGMP configured version is V3
     Fast leave is disabled
     Snooping switch is configured as Non-Querier
     Snooping switch is acting as Non-Querier
     Query interval is 125 seconds
     Port Purge Interval is 260 seconds
     Max Response Code is 100, Time is 10 seconds
   

   When IGS is enabled and disabled globally, but not enabled on VLAN 2, the show command produces:

   Snooping VLAN Configuration for the VLAN 2
     IGMP Snooping is disabled
     IGMP configured version is V3
     Fast leave is disabled
     Snooping switch is configured as Non-Querier
     Snooping switch is acting as Non-Querier
     Query interval is 125 seconds
     Port Purge Interval is 260 seconds
     Max Response Code is 100, Time is 10 seconds