are you seeing any messages about tunnel and routing loop?
if the "tunnel destination" turns out to resolve to a route
accessible via ospf/tunnel0 interface you will see the
behavior you describe.
Typically what i've done to resolve this in the past is to
static route the "tunnel dest" address out of the network.
- jared
On Tue, Feb 19, 2002 at 04:46:31PM -0800, Joe McGuckin wrote:
> 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
-- Jared Mauch | pgp key available via finger from jared@puck.nether.net clue++; | http://puck.nether.net/~jared/ My statements are only mine.
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