We have two sites that currently connect to each other over the internet with a VPN. Each site has their own T1 to the internet. We have ordered a point-to-point T1 to give us better speed and reliability between sites. Both sites use public IP's with full class-C addresses. I've never setup a cisco router to make such routing choices:
Site 1 Net 188.8.131.52/255.255.255.0 --> 172x cisco --> firewall --> T1 Internet Router --> Internet
Site 2 Net 184.108.40.206/255.255.255.0 --> 172x cisco --> firewall --> T1 Internet Router --> Internet
At minimum we would like to have the 172x's route through the private line traffic destined for the other site and through the firewall if it is for any other network. Ideally, the 172x's would failover to the firewall if the private line were down. Some help with the configs would be really great.