With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cipSecTunIkeTunnelAlive
Cisco IPSec Sec Tunnel Ike Tunnel Alive
1.3.6.1.4.1.9.9.171.1.3.2.1.3
An indicator which specifies whether or not the IPsec Phase-1 IKE Tunnel currently exists.
Back to CISCO-IPSEC-FLOW-MONITOR-MIB MIB page.
IPHost Network monitor allows you to monitor cipSecTunIkeTunnelAlive on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.