With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cswmForwardingEntry
cswm Forwarding Entry
1.3.6.1.4.1.9.9.504.1.6.1.1
A conceptual row of cswmForwardingTable, containing multicast forwarding information on a particular interface for every Internet address type supported.
Back to CISCO-SWITCH-MULTICAST-MIB MIB page.
IPHost Network monitor allows you to monitor cswmForwardingEntry 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.