With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cpimExtBidirDFRPAddress
cpim Ext Bidir DFRP Address
1.3.6.1.4.1.9.10.120.1.1.6.1.3
The Inetaddress of the RP for which the DF state is being maintained. Type of InetAddress presented in this object is same as that of cpimExtBidirDFRPAddressType in INDEX clause
Back to CISCO-IETF-PIM-EXT-MIB MIB page.
IPHost Network monitor allows you to monitor cpimExtBidirDFRPAddress on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.