With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cvpdnTunnelBytesOut
cvpdn Tunnel Bytes Out
1.3.6.1.4.1.9.10.51.1.1.1.1.5
The total number of output bytes through the tunnel.
Back to CISCO-VPDN-MGMT-EXT-MIB MIB page.
IPHost Network monitor allows you to monitor cvpdnTunnelBytesOut 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.