Technical

Troubleshooting a VPN is no different from troubleshooting any other routed network. The only difference is that before you troubleshoot VPN you need to make sure that the underlaying wan infrastructure (frame relays, internet links, etc.) is functioning properly. Once done, you can forget about the "virtual" part and go ahead with checking set up of your VPN connections, equipment, routing, address translation, etc.

To simulate a unit in a remote office you'll need to set up a test networkwith a VPN router (you can use a PC with RRAS) that mantains a tunnel to your "hub"-office. Use cloud emulation sw/hw (for example The Cloud from Shunra Software) to simulate a WAN link between the offices.