With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
carSWHistEventTime
car Switch History Event Time
1.3.6.1.4.1.9.9.458.1.2.5.1.6
The local date and time when the switchover event occurred and was logged to the system.
Back to CISCO-APPLIANCE-REDUNDANCY-MIB MIB page.
IPHost Network monitor allows you to monitor carSWHistEventTime 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.