RE: OSPF Weird Issue

Hi
NBMA mode send hello as unicast and it need the neighbor statement and also
perform DR/BDR election.also it require layer 3 to layer 2 resolution in FR.
Configure the DR which have full connectivity to the others routers in your
case it should me hub. the spoke cannt beDR becuase it does not have full
layer 2 connectivity with each other. manually set the OSPF pri to zero.
Disable inverse arp in FR. and also HUB have to FR statement point to the
spoke and spoke point to hubfirst configure the FR and check and test and then
configure the OSPF.
> Date: Mon, 13 Jun 2011 11:28:29 +0530
> Subject: OSPF Weird Issue
> From: routingfreak_at_gmail.com
> To: ccielab_at_groupstudy.com
>
> Hi all
> I got this log message when i m doing OSPF labs
>
> 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?
>
> What is meant by OSPF NonNeighbor and unknown neighbor?
>
>
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Received on Mon Jun 13 2011 - 15:20:48 ART