With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ciscoIpMRouteOctets
cisco Ip M Route Octets
1.3.6.1.4.1.9.10.2.1.1.2.1.30
The number of octets contained in IP datagrams which were received from these sources and addressed to this multicast group address, and which were forwarded by this router. This object is a 64-bit version of ipMRouteOctets.
Back to CISCO-IPMROUTE-MIB MIB page.
IPHost Network monitor allows you to monitor ciscoIpMRouteOctets on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.