Router A: This is the primary Internet gateway. To get the failover working I'd like to forward all the Internet traffic to a Remote Router B
Router B: This is the secondary Internet gateway. This router is connected to Router A via 5 hops.
Now, How can I efficiently forward Internet traffic to Router B from Router A when Router A Internet connection fails? We run EIGRP and these routers are connected over private network. Is VPN Tunnel an option or route-map?