Re: OSPF Weird Issue

Few things:-

Can you shut down all routers except R1 and R2's interface to the FR and
see. (divide and conquer..;))
You may need to establish the Ospf adj one by one between devices and check
when this issue pops in.

Neighbor statements are required only at one end, so unless you completely
wipe if off of all the interfaces
you may still see it up.

Best Regards,
Tharak Abraham Luke

On Mon, Jun 13, 2011 at 12:59 PM, Routing Freak <routingfreak_at_gmail.com>wrote:

> Hey,
> Just try this scenario dude
>
> R1
> R2
>
> | |
> |
> |
> I |
> | |
> | |
> |
> | |
> | |
> | |
> R5
> | |
> | |
> | |
> | |
> | |
> |
> |
> R3 R4
>
> R5 is the FR Switch, and R1,R2,R3 and R4 uses FR physical interface to form
> OSPF neighborship and they are using neighbor commands on R1 and R2 and R3
> So it is forming neighborship
>
> Full mesh frame-relay mapping is present and each router can ping each
> routers interface
>
> now when i remove the neighbor statements it should not form neighbor ship
> but still the neighborship stays up
>
>
>
>
>
> On Mon, Jun 13, 2011 at 12:50 PM, Manouchehr Omari <
> manouchehr1979_at_gmail.com> wrote:
>
>>
>> I labed the same scenario and i see no issue works great.
>>
>> btw, I'm also running dynamips on windows.
>>
>>
>>
>> On Mon, Jun 13, 2011 at 3:18 AM, Routing Freak <routingfreak_at_gmail.com>wrote:
>>
>>> Hey,
>>> This is not hub and spoke , full mesh frame relay mapping and evryone can
>>> reach evryone in the topology so I dont think so any issues with the L2
>>> connectivity.All L2 and L3 are up and running. So no issue with DR and BDR
>>> also
>>> When i clear the process also, i m getting the same issue.
>>>
>>>
>>> On Mon, Jun 13, 2011 at 12:45 PM, Abraham, Tharak <
>>> tharakabraham_at_gmail.com> wrote:
>>>
>>>> Can you define the hub as the DR and try ?
>>>>
>>>> Best Regards,
>>>> Tharak Abraham Luke
>>>>
>>>>
>>>> On Mon, Jun 13, 2011 at 12:41 PM, Routing Freak <
>>>> routingfreak_at_gmail.com> wrote:
>>>>
>>>>> HI muhammad,
>>>>> I used ospf over FR physial interface.
>>>>> So by default everything is nonbroadcast network type
>>>>> So i used neighbor command for unicast hello packets, so it forms
>>>>> neighborship but when i removed the neighbor command ,still the
>>>>> neighborship
>>>>> is up and i see some messages that neighbor is flapping and i get this
>>>>> error
>>>>> OSPF Nonneighbor,Sending hellp packets to unknown neighbor
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> On Mon, Jun 13, 2011 at 12:21 PM, muhammad adnan <
>>>>> taurusadnan19_at_gmail.com>wrote:
>>>>>
>>>>> > Dear did you configure correct ospf network type? ip ospf network
>>>>> > point-to-multi nonbroa
>>>>> >
>>>>> >
>>>>> > please post your configration.....
>>>>> >
>>>>> > Thanks a lot
>>>>> > Muhammad Adnan
>>>>> >
>>>>> >
>>>>> > On Mon, Jun 13, 2011 at 11:07 AM, Routing Freak <
>>>>> routingfreak_at_gmail.com>wrote:
>>>>> >
>>>>> >> Dude ,The nieghbor is in nonbradcast mode and i have given neighbor
>>>>> >> statements to all the neighbors
>>>>> >> thats all the command i have configured
>>>>> >>
>>>>> >>
>>>>> >> On Mon, Jun 13, 2011 at 11:35 AM, Manouchehr Omari <
>>>>> >> manouchehr1979_at_gmail.com
>>>>> >> > wrote:
>>>>> >>
>>>>> >> >
>>>>> >> >
>>>>> >> > Can you just paste the config of those 3 routers.
>>>>> >> >
>>>>> >> > Thanks,
>>>>> >> > Manny
>>>>> >> >
>>>>> >> >
>>>>> >> > On Mon, Jun 13, 2011 at 1:58 AM, Routing Freak <
>>>>> routingfreak_at_gmail.com
>>>>> >> >wrote:
>>>>> >> >
>>>>> >> >> 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?
>>>>> >> >>
>>>>> >> >>
>>>>> >> >> Blogs and organic groups at http://www.ccie.net
>>>>> >> >>
>>>>> >> >>
>>>>> _______________________________________________________________________
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>>>>>
>>>>>
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>>>>>
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Received on Mon Jun 13 2011 - 13:11:41 ART