wat-edge-1>sho ip igmp group fa7/37
IGMP Connected Group Membership
Group Address    Interface                Uptime    Expires   Last Reporter
224.5.6.7        FastEthernet7/37         00:01:54  00:02:27  128.59.7.10
wat-edge-1>sho ip igmp interface fa7/37
wat-edge-1>
# host 10 leaves
wat-edge-1>sho ip igmp group fa7/37    
IGMP Connected Group Membership
Group Address    Interface                Uptime    Expires   Last Reporter