We have a T1 with a 2651 Cisco router connecting us to the Internet. We are looking to install an additional Internet T1 with another 2651 router at one of our other branch locations. Both T1's will point to the same ISP, but differnt POP's.
I would like to know what is the best way to configure the routers for Internet failover? We want to use our main site as the main internet connection, but if that goes down we want the other router to come up from hot standby.
What would be the best protocol to use BGP, HSRP?
We talked with out ISP and they suggest just switching DNS records but that would take at least a day. There has to be a better way.