With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cpsmPortBindLastChangeTime
Cisco Port Security Manager Port Bind Last Change Time
1.3.6.1.4.1.9.9.364.1.1.5.1.2
The value of sysUpTime when the last change was made to the configuration port binding database on this VSAN/VLAN. If it has not been modified since the last re-initialization of the agent, then this object will contain a zero value.
Back to CISCO-PSM-MIB MIB page.
IPHost Network monitor allows you to monitor cpsmPortBindLastChangeTime on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.
