With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ptopoConnAgentNetAddr
ptopo Connection Agent Net Addr
1.3.6.1.2.1.79.1.1.1.1.11
This object identifies a network address which may be used to reach an SNMP agent entity containing information for the chassis and port components represented by the associated 'ptopoConnRemoteChassis' and 'ptopoConnRemotePort' objects. If no such address is known, then this object shall contain an empty string. This object may not be modified if the associated ptopoConnRowStatus object has a value of active(1).
Back to PTOPO-MIB MIB page.
IPHost Network monitor allows you to monitor ptopoConnAgentNetAddr on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.