With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cpimExtMRouteSourceTimer
cpim Ext M Route Source Timer
1.3.6.1.4.1.9.10.120.1.1.4.1.2
The time before this router ceases originating State Refresh messages for this route.
Back to CISCO-IETF-PIM-EXT-MIB MIB page.
IPHost Network monitor allows you to monitor cpimExtMRouteSourceTimer on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco wireless switches right now.