With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
dlswCircuitStateTime
dlsw Circuit State Time
1.3.6.1.4.1.2011.2.34.5.2.1.16
The amount of time (in hundredths of a second) since this circuit entered the current state.
Back to DLSW-MIB MIB page.
IPHost Network monitor allows you to monitor dlswCircuitStateTime 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.