What about Virtual-links too, aren't they considered a traffic type?
>>>Brian
>From: "Howard C. Berkowitz" <[EMAIL PROTECTED]>
>Reply-To: "Howard C. Berkowitz" <[EMAIL PROTECTED]>
>To: [EMAIL PROTECTED]
>Subject: RE: DR Election
>Date: Wed, 31 Jan 2001 12:19:07 -0500
>
> >There are three main types on environments (I hope)
>
>Correct, but also let me add:
>
> Demand circuit
>
>
> >
> >Broadcast
> >Point-to-Point
> >NBMA (Non-Broadcast Multi-Access)
> >
> >Point to Point would not be a multi-access segment. The other two would.
>An
> >Example of Broadcast is Ethernet, while an example of NBMA would be
> >Frame-Relay. Following this logic ' DR and BDR concepts ' would not have
>to
> >be broadcast, only multi-access. Point to point creates an adjacency
>instead
> >of using DR's and BDR's.
> >
> >I hope the diagram below turns out, but the first one is point to point,
>so
> >information is exchanged directly, however in a multi-access environment
> >both other routers only exchange information with the DR so as not to
>have
> >to have an adjacency with every single router.
> >
> >X-------X
> >
> > ----O
> >X-|
> > ----O
> >
> >If OSPF worked that way and you had 10 routers connected via Ethernet,
>each
> >would each have to exchange information with the other 9. That would
>create
> >45 adjacency's. Way to much traffic would have to exchanged. With those
>same
> >10 Routers using OSPF DR and BDR concepts, you could have 1 Router with
>10
> >"Adjacency's" total. Much less routing traffic. I hope I haven't muddled
> >things to much.
> >
> >Joey
> >
> >-----Original Message-----
> >From: pinoal [mailto:[EMAIL PROTECTED]]
> >Sent: Wednesday, January 31, 2001 2:58 AM
> >To: [EMAIL PROTECTED]
> >Subject: DR Election
> >
> >
> >
> >
> >Hi ,
> >
> >From the OSPF Design Guide - Sam Halabi
> >
> >' DR and BDR concepts are per multiaccess segment '
> >
> >My question is what type of segments are considered as "multiaccess
> >segment" ?
> >
> >Ethernet , FR with Point-to-Multipoint with broadcast option enabled ,
>any
> >others??????????
> >
> >What does he mean by 'per multiaccess segment ' ?
> >
> >thanks
> >
> >
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