I'm running into problems trying to build a network that can automatically fail over between two different public Internet connections, with edge firewalls that don't support any routing protocols.
I've got a multi-site MPLS based WAN network, all tied together with Adtran routers. One of the sites on the MPLS WAN also has a public Internet connection connected to a Meraki firewall, and that public Internet connection is the gateway for all the MPLS sites. So all public traffic flows through this single site, which is great but creates a single point of failure. To avoid this, we're looking to add another public Internet line on another Meraki firewall, in a different site on the MPLS WAN.
So, the new network map would have two locations, each with an Adtran router on the MPLS side, and a Meraki firewall hooked to the public Internet.
The problem here is that the Meraki firewalls don't support any routing protocols. The Adtrans will run BGP so that traffic can be dynamically redirected, but I can't see a way of notifying the Adtrans that the primary Internet route is down, so they fail over to the backup. Anyone know of a way to do this without adding more hardware?