With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cipSecTunHcInOctets
Cisco IPSec Sec Tunnel Hc In Octets
1.3.6.1.4.1.9.9.171.1.3.2.1.27
A high capacity count of the total number of octets received by this IPsec Phase-2 Tunnel. This value is accumulated BEFORE determining whether or not the packet should be decompressed.
Back to CISCO-IPSEC-FLOW-MONITOR-MIB MIB page.
IPHost Network monitor allows you to monitor cipSecTunHcInOctets on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.