I've got a bit of a troublesome issue with the GRE tunnel here, and any help will certainly be appreciated.
I have a GRE tunnel initiating from a Cisco 3845, thro' a Cisco ASA 7.2(4) and terminating on a Cisco 2811.
Thing is, every now and then, the tunnel hangs up and we have to shutdown both ends (interfaces), wait for 5 mins and then bring them back up. This is Cisco's recommendation.
However, this is happening on a more frequent basis and shut , no shut is not a workable option.
Any suggestions on how I can keep the tunnel from hanging up?