This, I guess, is a basic design question. I have a T1 between my main location and a remote location. I also have Internet connections at both locations with firewalls. Both locations have routers behind the firewalls that interface the T1 and the Internet (via the firewalls).
My question is: what is the best way to send all traffic over the VPN connection until that is not available and then switch to the T1? Will OSPF make those descisions, should I be testing the connection with something like RTR, should I be using MPLS?