We have a Cisco 1841 with a cdma cellular card. The router is configured to establish an IPSec tunnel back to our corporate office. This IPSec tunnel only allows GRE from the celluar interface to an Internal router at our corporate office. We then have a tunnel interface configured on this 1841 which establishes a GRE tunnel back to this internal router.
The above works great when the cellular interface is up, but when it goes down standard traffic doesn't bring it back up. Is there anyway to force this cellular interface to stay up no matter what? We have a true unlimited plan from Sprint so we're not worried about excessive data or usage.