guys,
i use a multipoint connections ...these are no different from ordinary
connections ...they can just accept multiple network`s
we have mulitple ospf area`s ...also have multiple class A`s all terminating
at these multipoint int`s
also when i said cost i meant the cost of having 10 point to point leased
lines connecting to 10 router int`s (central office) and one each at the
remote ( yeah i know you would never do it but using sub-ints saves you a
lot of money..... i would need a 3660 int the central office without
sub-ints and a 3620 with )
but agian you are right about the frame stuff
cheers for the info
steve
>From: "John Neiberger"
>Reply-To: "John Neiberger"
>To: [EMAIL PROTECTED]
>Subject: Re: OSPF over NBMA [7:7941]
>Date: Mon, 11 Jun 2001 13:16:39 -0400
>
>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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