debug ip igmp group

Matches the IGMP-enabled group based on the IP address.
Syntax
debug ip igmp group ipaddr
no debug ip igmp group ipaddr
Parameters
ipaddr
Refers to the IP address of the IGMP group.
Modes

Privileged EXEC mode

Examples
device# debug ip igmp group 10.11.66.62
IGMP: No L3 mcast, pkt S=10.11.66.62 to 225.1.1.167, on v8 (phy 1/2/4),
igmp_size=8
IGMP: rcvd Report-V2(t=22) g=225.1.1.167 resp=0, pkt S=10.11.66.62 to
225.1.1.167, on VL8 (phy 1/2/4), igmp_size=8