Switch>sho ip igmp snooping groups vlan 950
Switch>sho ip igmp snooping groups vlan 950
Vlan      Group          Type        Version     Port List
-------------------------------------------------------------
950       224.5.6.7      igmp        v2          Fa1/0/1, Fa1/0/4
Switch># host 11 starts listening
Switch>sho ip igmp snooping groups vlan 950
Vlan      Group          Type        Version     Port List
-------------------------------------------------------------
950       224.5.6.7      igmp        v2          Fa1/0/1, Fa1/0/4
Switch>sho ip igmp snooping groups vlan 950
Switch># host 11 left
Switch>