Re: [Diffserv-interest] size of a DiffServ domain
Brian E Carpenter <brian@hursley.ibm.com> Mon, 27 August 2001 16:52 UTC
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Date: Mon, 27 Aug 2001 11:49:10 -0500
From: Brian E Carpenter <brian@hursley.ibm.com>
Organization: IBM
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To: Jaeyoung Kim <jay@enisei.postech.ac.kr>
CC: diffserv-interest@ietf.org
Subject: Re: [Diffserv-interest] size of a DiffServ domain
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Jaeyoung Kim wrote: > > On Mon, Aug 27, 2001 at 09:10:12AM -0500, Aaron D Striegel wrote: > > I think Jaeyoung might have meant to inquire what a typical size was > > as opposed to a proper size in order to have a practical foundation for > > simulations. > > > > Aaron > > > > At 12:47 PM 8/27/2001 +0200, Marcus Brunner wrote: > > >Yes, DiffServ itself is scalable, however, don't forget the > > management/control systems (e.g., bandwidth bokers etc.). Depending on the > > architecture, the services you want to provide, and the number of customers > > you want to service, the mgt systems might be a bottleneck. > > > > > >Marcus > > Thank you, Aaron and Marcus, for clarifying what I meant in my previous > question. Theoretically, Mr. Carpenter's comment is correct. Absolutely > I agree on that DiffServ is scalable. > > However, when it comes to managing DiffServ networks, it is good to have > information in advance on how big the network of concern is. Although > there is no theoretical limitation on the size of DiffServ domain, my > intuition is saying that a practical size of one DiffServ domain will not > be over a size of 50 routers. Besides, the number of edge routers might > be less than 10 or 15. These numbers seem low to me. 50 routers is not even a large sized campus network, let alone a backbone. > > This estimation is important when devising simulation scenarios which > are as realistic as possible. Indeed. It would be very interesting to know the size-dependency as well - do the statistics look different as the network gets bigger? Brian > > I think it is helpful if I know the actual size of network domains of > some big backbone network providers. Anybody? > > Anyway, thank you for your valuable comments. > > Sincerely, > Jay Kim > > -- > ============================================================================ > __/\__ ** Remember Yesterday, Dream about Tomorrow, but ... LIVE TODAY !!! > \ /\ / ------------------------------------------------------------------- > /_\/_\ ** jay@postech.ac.kr http://home.postech.ac.kr/~jay > \/ ** Jaeyoung Kim Computer Science & Engineering, POSTECH, KOREA > > _______________________________________________ > Diffserv-interest mailing list > Diffserv-interest@ietf.org > http://www1.ietf.org/mailman/listinfo/diffserv-interest -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Brian E Carpenter Distinguished Engineer, Internet Standards & Technology, IBM On assignment for IBM at http://www.iCAIR.org Board Chairman, Internet Society http://www.isoc.org "We shall need a number of efficient librarian types to keep us in order." - Alan Turing, 1947. _______________________________________________ Diffserv-interest mailing list Diffserv-interest@ietf.org http://www1.ietf.org/mailman/listinfo/diffserv-interest
- [Diffserv-interest] size of a DiffServ domain Jaeyoung Kim
- Re: [Diffserv-interest] size of a DiffServ domain Brian E Carpenter
- Re: [Diffserv-interest] size of a DiffServ domain Marcus Brunner
- Re: [Diffserv-interest] size of a DiffServ domain Aaron D Striegel
- Re: [Diffserv-interest] size of a DiffServ domain Brian E Carpenter
- Re: [Diffserv-interest] size of a DiffServ domain Jaeyoung Kim
- Re: [Diffserv-interest] size of a DiffServ domain Brian E Carpenter