>What about Virtual-links too, aren't they considered a traffic type?
I might be getting in trouble here answering off the top of my head,
but IIRC they are treated as point-to-point links terminating in the
router ID at each end.
>
>>>>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
>>>
>>>
>>>_________________________________
>>>FAQ, list archives, and subscription info:
>>>http://www.groupstudy.com/list/cisco.html
>>>Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
>>>
>>>_________________________________
>>>FAQ, list archives, and subscription info:
>>>http://www.groupstudy.com/list/cisco.html
>>>Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
>>
>>_________________________________
>>FAQ, list archives, and subscription info:
>>http://www.groupstudy.com/list/cisco.html
>>Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
>
>_________________________________________________________________
>Get your FREE download of MSN Explorer at http://explorer.msn.com
_________________________________
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
