With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cikeTunHistOutP2ExchgInvalids
Cisco IKE Tunnel History Out P2 Exchg Invalids
1.3.6.1.4.1.9.9.171.1.4.2.1.1.36
The total number of IPsec Phase-2 exchanges sent and found to be invalid by this IPsec Phase-1 IKE Tunnel.
Back to CISCO-IPSEC-FLOW-MONITOR-MIB MIB page.
IPHost Network monitor allows you to monitor cikeTunHistOutP2ExchgInvalids 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.