With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
vmpsMacConfigLastAccessed
vmps Mac Config Last Accessed
1.3.6.1.4.1.9.9.53.1.2.1.1.3
The value of sysUpTime when this entry was last used to map a MAC address to a VLAN name. Managers may opt to use this object to garbage collect entries that have not been used for a prolonged period of time.
Back to CISCO-VMPS-MIB MIB page.
IPHost Network monitor allows you to monitor vmpsMacConfigLastAccessed 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.