[nsp] GRE tunnels and OSPF ?

From: Joe McGuckin (joe@monk.via.net)
Date: Tue Feb 19 2002 - 19:46:31 EST


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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