Our main office is connected to satellite office via a layer 2 1gbps EPL, and both offices are on the same subnet. The main office's gateway is 172.16.4.1 which is the on-prem firewall connected to a 1gbps DIA circuit. The satellite office's gateway is 172.16.5.1 which is on on-prem firewall connected to a 1gbps DIA circuit. We have DHCP setup at each office which provides the appropriate gateway when assigning an IP. DHCP traffic is not allowed to traverse the EPL.
To provide a backup to the satellite office DIA without having to pay for a second circuit, would it be possible to configure the ASA to route traffic to 172.16.4.1 instead of the outside IP in case the DIA circuit went down?
