I don't wether its still available since HP got involved but Compaq have a great SNMP based tool call Compaq Network Management Software (CNMS) which I use a lot to get real time performance stats. This is a free downloadable tool.Compaq file you nee...
You can do a real-time snapshot using netflowOn the interface configuration add ip route-cache flowFrom exec use sho ip cache flow This will show you the individual traffic flows and packet rates Etc
Checkout bug CSCdr36482 - I've been having the same problems.Try moving the tunnel config from Tunnel 0 to Tunnel 1 on both routers- I know it sounds strange but i've had some sucess doing this.Sometimes just deleting and re-adding the tunnel interfa...