With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
mcastEnableRgmp
mcast Enable Rgmp
1.3.6.1.4.1.9.5.1.12.4
Protocol is enabled on the device or not. When RGMP is enabled in conjunction with Cisco routers running RGMP, multicast data traffic is forwarded only to those multicast routers that are interested to receive that data traffic. IGMP snooping feature must be enabled on the system to make RGMP feature operational.
Back to CISCO-STACK-MIB MIB page.
IPHost Network monitor allows you to monitor mcastEnableRgmp on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.