With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
atmVcCrossConnectH2LLastChange
Cisco ATM Vc Cross Connect H 2 L Last Change
1.3.6.1.2.1.37.1.11.1.12
The value of sysUpTime at the time this VC cross-connect entered its current operational state in high to low direction.
Back to ATM-MIB MIB page.
IPHost Network monitor allows you to monitor atmVcCrossConnectH2LLastChange on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco wireless switches right now.