I have the following scenario:
Site A has a link to the Internet
Site B also has a link to the Internet.
Site A & B have a point-2-point link between them and running EIGRP.
Each site has a default route pointed to a Pix firewall.
Let's say Site A is 192.168.1.0/24 and Site B is 192.168.2.0/24 and running EIGRP. What's the easiest way for Site A to go through Site B in case it loses its Internet link and vice-versa for Site B?