With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cikeTunHistStartTime
Cisco IKE Tunnel History Start Time
1.3.6.1.4.1.9.9.171.1.4.2.1.1.19
The value of sysUpTime in hundredths of seconds when the IPsec Phase-1 IKE tunnel was started.
Back to CISCO-IPSEC-FLOW-MONITOR-MIB MIB page.
IPHost Network monitor allows you to monitor cikeTunHistStartTime 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.