With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cpsmPortBindLastActTime
Cisco Port Security Manager Port Bind Last Act Time
1.3.6.1.4.1.9.9.364.1.1.2.1.3
The sysUpTime at which the valid port bindings on this VLAN/VSAN were last activated. If the last activation took place prior to 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 cpsmPortBindLastActTime on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco optical switches right now.