Re: Interesting question - I saw recently

From: Ronnie Angello (ronnie.angello@gmail.com)
Date: Fri Dec 07 2007 - 23:31:40 ART


You have ospf network type point-to-point enabled on all of the routers?

On Dec 7, 2007 7:49 PM, Darby Weaver <darbyweaver@yahoo.com> wrote:

> Resetting OSPF neighbors on frame relay.
>
> Consider a fully-meshed frame-relay network with three
> routers. The three routers are connected to the the
> frame relay cloud with the IP addresses 10.10.10.1,
> 10.10.10.2 and 10.10.10.3 respectively. However, the
> neighbor relationship on all the routers constantly
> keeps getting reset with messages like the following -
>
>
> *Mar 4 16:10:01.333: %OSPF-5-ADJCHG: Process 100, Nbr
> 10.10.10.3 on Serial2 from LOADING to FULL, Loading
> Done
> *Mar 4 16:10:05.261: %OSPF-5-ADJCHG: Process 100, Nbr
> 10.10.10.3 on Serial2 from FULL to DOWN, Neighbor
> Down: Adjacency forced to reset
> *Mar 4 16:10:05.521: %OSPF-4-NONEIGHBOR: Received
> database description from unknown neighbor 10.10.10.3
> *Mar 4 16:10:08.813: %OSPF-5-ADJCHG: Process 100, Nbr
> 10.10.10.2 on Serial2 from EXSTART to DOWN, Neighbor
> Down: Adjacency forced to reset
> *Mar 4 16:10:11.485: %OSPF-4-NONEIGHBOR: Received
> database description from unknown neighbor 10.10.10.2
> *Mar 4 16:10:12.593: %OSPF-5-ADJCHG: Process 100, Nbr
> 10.10.10.3 on Serial2 from LOADING to FULL, Loading
> Done
> *Mar 4 16:10:14.905: %OSPF-5-ADJCHG: Process 100, Nbr
> 10.10.10.3 on Serial2 from FULL to DOWN, Neighbor
> Down: Adjacency forced to reset
> *Mar 4 16:10:19.013: %OSPF-5-ADJCHG: Process 100, Nbr
> 10.10.10.2 on Serial2 from EXCHANGE to DOWN, Neighbor
> Down: Adjacency forced to reset
>
>
> Given just this information, can you determine what
> the problem might be here?
>
> Now I found this in a blog, but I just had this
> problem in my own lab and it bothered me so much I had
> to fix it. I thought I had a bad WIC or a bad cable
> or even my frame switch had a bad serial interface at
> first.
>
> What do you think will fix it?
>
> Consider carefully, in the lab this would drive you
> nuts.
>
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-- 
Ronald Angello
CCIE #17846


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