I am trying to setup a VPN backup solution for one of our MPLS connected branch offices. I've configured the tunnel interfaces as required and that is working as expected, however I'm looking for suggestions on which direction to go with the routing.
The MPLS routers at both sites are running EIGRP (different AS's) and redistributing into BGP to traverse the provider MPLS network (both using same private AS number).
My original thought was to just use BGP and setup peering between the tunnel interfaces, but since the AS numbers are the same the routes learned via the backup path become iBGP and are prefered over the eBGP learned routes of the primary MPLS path.
Does anyone have any suggestions? Are there any best practices when it comes to GRE tunnel interfaces and routing?