Dual tunnel interfaces DMVPN I need help

Brent Rockburn · ‎12-19-2008

I have a spoke that has a back tunnel interface. Tunnel10 works fine but tunnel 20 does not. When I reverse the interfaces that the tunnels int's are associated with then then tunel20 works and tunnel10 does not. I'm seeing a tunnel get formed but there are only encaps from the spoke and only decaps from the hubs. I'm assuming that I need some sort of vrf config here .. but I don't know and I have limited experience with VRF .. and by limited .. I mean none!

Thanks for the help!!

Giuseppe Larosa · ‎12-19-2008

Hello Brent,

may you post your config in order to get better help ?

It looks like that one physical inteface has some troubles, can you make an extended ping using the external ip addresses.

However, it also can be that from the point of view of hub routers one path is always preferred whatever you do at the spoke.

You should post show about topology on the hubs for internal LAN on the spoke.

What protocol is used in the DMVPN clouds ?

The usage of VRF can be required or not depending on your scenario.

Hope to help

Giuseppe