With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cipSecPhase2GWInDecryptFails
Cisco IPSec Sec Phase2 GW In Decrypt Fails
1.3.6.1.4.1.9.9.171.1.3.5.1.13
The total number of inbound decryption's which ended in failure by all current and previous IPsec Phase-2 Tunnels.
Back to CISCO-IPSEC-FLOW-MONITOR-MIB MIB page.
IPHost Network monitor allows you to monitor cipSecPhase2GWInDecryptFails on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.