I'm not positive at what you're looking for, but if you are talking about
the number of adjacencies that would be required to be fully meshed on a
broadcast or NBMA network then the formula you're looking for is (N * (N-1)
) / 2. Of course this doesn't happen in OSPF since it uses DRs and BDRs in
order to avoid having to have so many full adjacencies, so in OSPF each
router (excluding the DR and BDR) has only two full adjacencies, one with
the DR and one with the BDR and it is in a 2-way state with the rest of
it's neighbors.
Did that answer your question?
At 01:38 PM 1/12/01 -0600, you wrote:
>Hello,
>
>I am drawing a blank and am trying to remember the formula to figure the
>number of adjacencies a router would have.
>
>I know it's a simple question, I am just drawing a blank.
>
>Thank You,
>
>-Eric
>
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