With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cpimExtRPSetExpiryTime
cpim Ext RP Set Expiry Time
1.3.6.1.4.1.9.10.120.1.1.7.1.9
The minimum time remaining before the RP denoted by this entry will be declared down. In case of 'bsr' cpimExtRPSetType, if the local router is not the BSR, this value is 0.
Back to CISCO-IETF-PIM-EXT-MIB MIB page.
IPHost Network monitor allows you to monitor cpimExtRPSetExpiryTime 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.