We have dark fiber ran between our local sites. Everything is terminated at a 6500 and appears as a locally connected route. Someone proposed using a DMVPN as a backup should our fiber get severed. DMVPN doesnt appear to be the correct solution since everything terminates at the 6500. With 2901 routers in hand is there a way to utilize them to make a trunk port over comcast/att should the fiber go down?