With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
atmVplLastChange
Cisco ATM Vpl Last Change
1.3.6.1.2.1.37.1.6.1.4
The value of sysUpTime at the time this VPL entered its current operational state.
Back to ATM-MIB MIB page.
IPHost Network monitor allows you to monitor atmVplLastChange on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.