We have two sites connected with redundant 1gb & 100mb point to point links. At both sites we have Cisco 3750 switch stacks vlaned with c3750-advipservicesk9-mz.122-40.SE installed. Internet is at each site with different ISPs and connect to the switch stacks via ASA 5510 v7.2(2) firewalls. We are running EIGRP internally. The point to point links are connected straight to the switch stacks which have been changed to router ports using "Ã‚Â€Ã‚Âœno switchport".
Site A has servers and the fastest internet connection. Site B has servers, users and a much slower internet connection.
We want to configure routing so internet traffic for both sites goes through site A. If site A' internet goes down traffic should route through site B.
We cannot use BGP or change the internet connections in any way, it needs to be done with the existing hardware.
Any thoughts on the best way to tackle this?
Many thanks in advance