With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cpimExtRPSetAddress
cpim Ext RP Set Address
1.3.6.1.4.1.9.10.120.1.1.7.1.7
The Inet Address of the RP. Type of InetAddress presented in this object is same as that of cpimExtRPSetAddrType in INDEX clause
Back to CISCO-IETF-PIM-EXT-MIB MIB page.
IPHost Network monitor allows you to monitor cpimExtRPSetAddress 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.