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New Member

adjacencies

Does this mean Neighbour ? and also do ospf routers form direct adjacencies with each other ? even without the DR/BDR or is this needed for them to see each other ?

  • Other Network Infrastructure Subjects
8 REPLIES

Re: adjacencies

Adjacency means neighbor relationship. On a broadcast multiaccess network like ethernet, OSPF routers donot form adjacencies directly with each other, they form it with DR and BDR only.

HTH, Please rate if it does.

-amit singh

New Member

Re: adjacencies

So do neighbours never form directly then ? they have to go via the DR ?

Re: adjacencies

Hi,

Yes, Only with the DR and BDR.The DR and BDR functaionality is to limit the number of adjancies that can be formed in an area thus reducing the OSPF convergence due to one neighor failure or a link failure.

HTH, Please rate if it does.

-amit singh

New Member

Re: adjacencies

Hi amit

Can you please tell me the steps that it goes through when finding an adjacency ? I always thought it would see directly the neighbour and add it to the routing table ?

Re: adjacencies

Hi Carl,

This link has all the neccesary info that yoiu are looking for :

http://www.cisco.com/warp/customer/104/1.html#t20

HTH, please rate if it does.

-amit singh

New Member

Re: adjacencies

I cant access the white paper im afraid !!

thanks

Re: adjacencies

You should now access it:

http://www.cisco.com/warp/public/104/1.html

-amit singh

New Member

Re: adjacencies

So if the DR and BR go off, the network would be uselesss, and so do all routers form no kind of direct neighbourship so to speak ?

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