We currently have the following setup:

2 - 2501 routers connected via a leased T1 line between our branch location and our main location.

1 Cisco 1720 router at our branch location connected to our ISP.

1 Cisco 1720 router at our main location connected to our ISP.

We currently have routing setup so that our branch location connects to a bank of severs at the main using only the 2501s via the leased T1 line.

We would like to set up routing so that if the leased line fails, our connections to the in-house servers will fail over to the 1720s.

Both the 2501 and the 1720 are outside the firewall at the main location so subnet we are routing to is the same over either set of routers. We have manually made the routing change during long periods of downtime with the leased line. So, we know that routing over the 1720s will work. We just want it to work automatically when the leased line goes down.

I can provide current configurations if this is doable.

Thanks in advance,

Ron