Hi, On Wed, Jul 21, 2010 at 07:33:56PM -0600, Quinn Kuzmich wrote: > To make this stranger, it's only ONE end of the tunnel going down. > The other side stays up.
That's not overly surprising as there is no signalling protocol on a GRE
tunnel (unless keepalives are configured) that could affect this.
My bet is that you're losing the route to the tunnel destination for a
moment, for whatever reason - and then IOS will make the tunnel "down".
Try setting up "debug ip routing" (caveat: don't do this on a box that
has a full Internet routing table, or lots of other instabilities in its
routing table).
gert
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