VPN stats for Cisco routers

[FlorinAndrei]

The basic Cisco router template is fine for CPU usage and network traffic, but are there any templates dealing with VPN on, say, a 28xx router?

I could graph the traffic on the tunnel interface, and that should give me some info about the status of VPN, but is there a way to count the number of sessions, etc? I'm looking to do this for a DMVPN grid, as well as for a network of static VPN tunnels - on separate devices.