With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cikePeerActiveTime
Cisco IKE Peer Active Time
1.3.6.1.4.1.9.9.171.1.2.2.1.8
The length of time that the peer association has existed in hundredths of a second.
Back to CISCO-IPSEC-FLOW-MONITOR-MIB MIB page.
IPHost Network monitor allows you to monitor cikePeerActiveTime on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.