Is it possible to have 2 separate internet connections coming into one router, and just route connections through one and not the other unless the one goes down? Would you do this with static routes:
ip route 0.0.0.0 0.0.0.0 serial0
ip route 0.0.0.0 0.0.0.0 fa0/1 254
Would that work?
you can do exactly in this way:
the second default route is used only if the first one fails.
You may also use object tracking:
in this case you can define other events that will make the router to use the backup default route (for example ip reachability of some specific address)
Hope to help