With frame relay, this is not exactly the case. Suppose we had 10
remote sites with one PVC to each. All ten PVCs could point back to a
single interface on a hub router. If they all point to the same local
DLCI, then the configuration is point-to-multipoint. If they point to
different DLCIs, then the configuration is point-to-point and
subinterfaces can be used.
As far as I know there is no cost difference between these two
configurations, but since I've never ordered any multipoint connections
I really don't know for certain.
John
>>> "Stephen Skinner" 6/11/01 10:37:13 AM
>>>
one other thing no-one has seemed to say is cost....
point to point requires a point to point link (i.e 2 interfaces)
Full Mesh
point to multipoint requires 1 and X (x bieng how many remote sites you
have).....
Star topology
E.G
we have 40 remotes sites . running anything form 128k to 4 meg and we
have 2
multipoint 10 meg int`s at the central side
saves time money and configs
steve
>From: "John Neiberger"
>Reply-To: "John Neiberger"
>To: [EMAIL PROTECTED]
>Subject: Re: OSPF over NBMA [7:7941]
>Date: Mon, 11 Jun 2001 11:11:54 -0400
>
>One reason that comes to mind might be if you had a limited number of
>addresses and conservation was necessary. Using multipoint PVCs all
>endpoints would be in the same subnet. If you wanted to use PVCs,
each PVC
>would be in a separate subnet. The effect of this could be
alleviated
>somewhat by intelligent use of VLSM but I suppose it could still be a
>problem for some.
>
>I could see this situation happening if you were using registered
>addresses.
>Now that NAT is so prevalent this wouldn't be an issue in a new
network
>design.
>
>At least I don't think it would be.
>
>Another very good reason to learn about this topic is that Cisco seems
to
>like to test people on it. :-)
>
>Regards,
>John (who is off to the coffee maker now....)
>
>Avs Rule!! (Hey, is the sky turning maroon or is that just me??)
>
>| Whenever reading about OSPF there seems to be a great deal of
emphasis
>on
>| NBMA in a multipoint enviroment.
>| Why would you want to implement mulipoint when you could uses point
to
>point
>| between remote offices connecting back to area0 ??
>|
>| Chris Burnham,
>| Systems Engineer,
>| Delphis Consulting Plc.
>| Tel: +(44) 020 7916 0200
>| Mob: +(44) 07799403576
>| [EMAIL PROTECTED]
>|
>|
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