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You need to put a static route to the destination IP on each router
- -- that way the routers aren't learning about the destination via the
Tunnel.
- ----- Original Message -----
From: "Joe McGuckin" <joe@monk.via.net>
To: <cisco-nsp@puck.nether.net>
Sent: Tuesday, February 19, 2002 6:46 PM
Subject: [nsp] GRE tunnels and OSPF ?
> I'm trying to setup a backup connection using a GRE tunnel over a
> seperate ethernet network.
>
> For the tunnel I have:
>
> Router A:
>
> interface Tunnel0
> ip address 209.81.1.33 255.255.255.252
> no ip directed-broadcast
> ip mtu 1500
> tunnel source W.X.Y.Z
> tunnel destination A.B.C.D
>
> Router B:
>
> interface Tunnel0
> ip address 209.81.1.34 255.255.255.252
> no ip directed-broadcast
> ip mtu 1500
> tunnel source A.B.C.D
> tunnel destination W.X.Y.Z
>
>
> The tunnel comes up and OSPF on the 2 routers exchanges routes.
>
> Then, to test it, I unplug the primary net connection (a DS3).
>
> After about 10 seconds, the tunnel dies. Then after another 5
> seconds, the tunnel is re-established.
>
> The tunnel (and OSPF between the two routers) just bounces up and
> down forever.
>
> What am I doing wrong ?
>
> Thanks,
>
> Joe
>
>
> --
>
> Joe McGuckin
>
> ViaNet Communications
> 994 San Antonio Road
> Palo Alto, CA 94303
>
> Phone: 650-213-1302
> Cell: 650-207-0372
> Fax: 650-969-2124
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