Is there a way, either via the CLI or PDM to monitor individual VPN tunnels? Our PIX firewalls are 515Es with running FOS v.6.2(2) FOS and PDM v.2.1(1).
Take a look at this news: This product helps monitor IPSec VPNs as well as L2TP and PPTP VPNs, and IPSec based site-to-site and remote access VPNs. Tunnel throughput, active tunnel and session activity etc. can be monitored.