With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ptopoConnLastVerifyTime
ptopo Connection Last Verify Time
1.3.6.1.2.1.79.1.1.1.1.15
If the associated value of ptopoConnIsStatic is equal to 'false(2)', then this object contains the value of sysUpTime at the time the conceptual row was last verified by the agent, e.g., via reception of a topology protocol message, pertaining to the associated remote chassis and port. If the associated value of ptopoConnIsStatic is equal to 'true(1)', then this object shall contain the value of sysUpTime at the time this entry was last activated (i.e., ptopoConnRowStatus set to 'active(1)').
Back to PTOPO-MIB MIB page.
IPHost Network monitor allows you to monitor ptopoConnLastVerifyTime 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.