I'm having a weird problem with an IPSEC GRE tunnel I have. The setup is a central router (2801) connected to internet and a remote location (1811 i think) bringing up a secure tunnel between the locations.
The tunnel will come up and be fine. If the remote router loses power (happens fairly often), the only way to re-establish the connection is to clear crypto sa on the 2801 router.
The ISAKMP peers show as up "QM_IDLE", but the Tunnel interface is UP/DOWN. I will post IOS / configs when I get access to them. Anyone had this same problem?