Did you enter the VPN address in the network audio setting in the softphone?Settings->Audio->Network Audio SettingsIn IP Address Settings select "specify address" and type in you vpn address there. If you are behind a hardware VPN app, then you'll ne...
You can do a "sho mac" and it will tell you the ammount of traffic accross each port. At the bottom, it will show you the last time the counters were cleared. You could clear the counters wait a couple of days, the do your "sho mac" and see if anyone...