I have a 3845 and a 2821 router. I want to configure a router-to-router VPN as a backup to the WAN connect. If the WAN goes down the VPN on the 2821 will kick in and establish a connection to the 3845. I am using EIGRP and BGP on the network. Routing should update and traffic will pass on the new VPN tunnel. Does anyone know of any good config documents on this?
I have this problem too.