With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cscRdrDestInetAddressType
csc Rdr Dest Inet Address Type
1.3.6.1.4.1.9.9.637.1.2.1.2
This object indicates the type of Internet address by which the RDR destination server is reachable.
Back to CISCO-SERVICE-CONTROL-RDR-MIB MIB page.
IPHost Network monitor allows you to monitor cscRdrDestInetAddressType 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.