Should DMVPN work over the MG21? I have got it to work and stay up all night. But to test stability, I shut/no-shut the tunnel interface on the router and DMVPN will not come back up. At some random point through the  day, it may come back up. But I've never had this much trouble with DMVPN before and am beginning to wonder if the MG21 is denying access in.   Thoughts? ... View more