Re: OSPF neighbor on non-broadcast OSPF network type

From: Anantha Subramanian Natarajan <anantha.natarajan_at_gravitant.com>
Date: Sun, 24 May 2009 18:12:48 -0500

Hi Rsharma,

 Sure will do that ...Meantime I have to erase the current config which I am
using for different topology and try to replicate the same config,which I
was using before .Once done will paste you the config provided the
neighborship comes back.

Thanks

Regards
Anantha Subramanian Natarajan

On Sun, May 24, 2009 at 6:10 PM, Rsharma <cciers09_at_gmail.com> wrote:

> Yes Its true that router will form neighborship in the case of one side
> ospf network broadcast and other side as Non_broadcast with adjusting timers
> ....as Broadcast side router will intiate neighborship process.
> But its strange to knw that Both sides are non-broadcast and still you are
> able to see ospf neighbor on it.
>
> Neighbors are discovered using multicast hello packets.successful neighbor
> discovery on a segment, the network must allow broadcasts or multicast
> packets to be sent.
>
> Kindly confirm your layer 2 configuration .....can you paste your config
> here to verify ???
>
> *Rsharma*
>
> On Mon, May 25, 2009 at 4:27 AM, Anantha Subramanian Natarajan <
> anantha.natarajan_at_gravitant.com> wrote:
>
>> Hi Divin,
>>
>> Both sides were non-broadcast
>>
>> Thanks
>>
>> Regards
>> Anantha Subramanian Natarajan
>>
>> On Sun, May 24, 2009 at 5:08 PM, Divin Mathew John <divinjohn_at_gmail.com
>> >wrote:
>>
>> > Broadcast and NBMA there wont be any nieghbourship formed due to timer
>> > mismatch by default.. you could tweak the timers and get it working.!
>> > Thanking You
>> >
>> > Yours Sincerely
>> >
>> > Divin Mathew John
>> > divinjohn_at_gmail.com
>> > divin_at_dide3d.com
>> > http://www.dide3d.com
>> > +91 9945430983
>> > +91 9846697191
>> > +974 5008916
>> > PGP PUBLIC KEY BLOCK @ http://www.dide3d.com/divin_Public_PGP_key.txt
>> > Sent from Bangalore, KA, India
>> >
>> > On Mon, May 25, 2009 at 3:38 AM, Santiago Enciso <
>> > senciso_at_infocenter.com.py> wrote:
>> >
>> >> Did the adjacency reached the full state?
>> >> Were both sides non-broadcast? BCAST and NBCAST are compatible network
>> >> types.
>> >>
>> >> Santiago E
>> >>
>> >> -----Mensaje original-----
>> >> De: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] En nombre de
>> >> Anantha Subramanian Natarajan
>> >> Enviado el: Domingo, 24 de Mayo de 2009 15:09
>> >> Para: hanan; Cisco certification
>> >> Asunto: Re: OSPF neighbor on non-broadcast OSPF network type
>> >>
>> >> Hi Hanan,
>> >>
>> >> Thanks and will try that.
>> >>
>> >> Regards
>> >> Anantha Subramanian Natarajan
>> >>
>> >> On Sun, May 24, 2009 at 1:47 PM, hanan <nouran_at_skynet.be> wrote:
>> >>
>> >> > Hi
>> >> >
>> >> > Its happen to me once and i didn't understand why but if you save
>> >> > configuration and reload the routers you will not have any neighbour
>> >> > anymore
>> >> > unless you put neighbour command.
>> >> >
>> >> >
>> >> > Regards
>> >> >
>> >> >
>> >> >
>> >> > -----Original Message-----
>> >> > From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf
>> Of
>> >> > Anantha Subramanian Natarajan
>> >> > Sent: Sunday, May 24, 2009 8:25 PM
>> >> > To: Cisco certification
>> >> > Subject: OSPF neighbor on non-broadcast OSPF network type
>> >> >
>> >> > Hi All,
>> >> >
>> >> > I ran OSPF on an non-broadcast OSPF network type between R1 and R2
>> and
>> >> > saw the neighbor came up without configuring explicitly "neighbor "
>> >> command
>> >> > under the OSPF process.I was assuming the neighbor command is
>> >> > required.Kindly let me know on this and also if missed some basic on
>> it.
>> >> >
>> >> > Thanks
>> >> >
>> >> > Regards
>> >> > Anantha Subramanian Natarajan
>> >> >
>> >> >
>> >> > Blogs and organic groups at http://www.ccie.net
>> >> >
>> >> >
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Received on Sun May 24 2009 - 18:12:48 ART

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