Server - Two Internet Coections - T1 line & Broadband - Static IPs

Setting up a new server to replace an existing.

Server does DNS, web, e-mail services.

The current server is coected to a network with a Broadband coection with a static IP address. It has a VM installed over the top of it that is then used to use the T1 coection with a static IP address.

Goal is to make use of both Inteet coections for redundancy (coected to the same switch, just different default gateways). If The Broadband line is down, access is still available to the server from the T1 IP address. Vice-versa if the T1 is down.

Not sure if this is possible. The other option would be to only use one Inteet coection with a cron script that pings an outside IP. Upon a failure, a script would be ran to change the default gateway on the server to start using the other coection.

Or, just stick with the way the current server is setup except modify it so there is the KVM host with two VMs ruing on top with each pointing out the different coection. Then that means setting up NFS to share the home directories for e-mail and the web directory to share the website resources.