GRE tunnel flapping

[scottshaw2]

Trying to create a GRE tunnel between two routers that cross another network.

I have the following configs on the routers, I can ping across the tunnel, everything seems to work until I try adding ospf.

then I  the following error: FULL to DOWN, Neighbor Down: Interface down or detached

GRE tunnel, Routing Protocols,

 

[Giuseppe Larosa]

Hello @scottshaw2 ,

the tunnel key provides a way to easily process the GRE packets so it may help in making hardware processed the tunnel traffic.

Usually it is used when there are multiple GRE tunnels with the same source IP address.

Hope to help

Giuseppe