We are trying to connect a partner to our network with support for dynamic routing and failover between a primary T1 connection and a backup Internet L2L IPSec connection. We use EIGRP internally, but because of the firewalls in between us and the partner, I don't believe that EIGRP end-to-end will work. How have other sites connected networks in this fashion? What is a good solution that offers dynamic failover between links when the link or the router goes down and the remote network becomes unavailable?
Attached is a brief diagram.
Thanks for the help!