With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cisMulticastGroupInclHostCount
Cisco IGMP Snooping Multicast Group Incl Host Count
1.3.6.1.4.1.9.9.263.1.7.2.1.10
This object indicates the number of hosts that are in INCLUDE mode for the group.
Back to CISCO-IGMP-SNOOPING-MIB MIB page.
IPHost Network monitor allows you to monitor cisMulticastGroupInclHostCount on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco optical switches right now.