With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cIpMRouteNextHopIfIndex
Cisco Ip Multicast Route Next Hop If Index
1.3.6.1.4.1.9.10.117.1.1.3.1.5
The ifIndex value of the interface for the outgoing interface for this next-hop.
Back to CISCO-IETF-IPMROUTE-MIB MIB page.
IPHost Network monitor allows you to monitor cIpMRouteNextHopIfIndex 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.