With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
csc Rdr Dest Priority
This object indicates the priority given to the RDR destination server. The RDR formatter determines the priority of a destination by the value of entPhysicalIndex and the RDR category of the destination. RDR formatter assigns the highest priority to the destination which has the same value of entPhysicalIndex and RDR category as that of the RDR formatter. The RDR formatter activates the destination server which is reachable and with the highest priority.
Back to CISCO-SERVICE-CONTROL-RDR-MIB MIB page.
IPHost Network monitor allows you to monitor cscRdrDestPriority on Cisco device via the SNMP protocol.
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Easy monitoring of cscRdrDestPriority with IPHost tools