Re: [Diffserv-interest] Re: Diffserv-interest digest, Vol 1 #113 - 3 msgs
Brian E Carpenter <brc@zurich.ibm.com> Fri, 14 November 2003 13:45 UTC
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Date: Fri, 14 Nov 2003 14:43:08 +0100
From: Brian E Carpenter <brc@zurich.ibm.com>
Organization: IBM
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To: Jing Shen <jshen_cad@yahoo.com.cn>, diffserv-interest@ietf.org
Subject: Re: [Diffserv-interest] Re: Diffserv-interest digest, Vol 1 #113 - 3 msgs
References: <20031114121416.15063.qmail@web15213.mail.bjs.yahoo.com>
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Whether a service class is over provisioned or under provisioned (i.e. overbooked) is just an operational choice by the ISP. For a PDB built using the EF PHB, it would be bizarre to under-provision, but for the class selector PHBs, the default PHB, or an AF class, under-provisioning would be a possible choice. In fact, in a diffserv deployment, I would expect the default PDB to be under-provisioned - otehrwise, there would be little reason to offer "better than default" PDBs. Brian Jing Shen wrote: > > I'm not so clear with "overbooking" in DiffServ > network. To my understanding, there will be no > end-to-end explicit bandwidth allocation in DiffServ > Networks. At that of current IP network, ISP just > provides internet access to customers and core network > is overprovisioned to guarantee service quality. So, > to my expection "logical Golden Service Network" in > DiffServ will not has explict e2e tunnel at all. Where > comes overbooking? > > --- "John H. Shuler" <johnshuler@mac.com> µÄÕýÎÄ£º> > Brian, > > > > I agree. My suggestion would be to keep it simple so > > as to be easily > > implemented as a common denominator standard that > > works, then refine it over > > time after experience demonstrates a need. If it > > starts out too complicated, > > it will be too expensive to implement and therefore > > usurp the purpose. > > > > ===== > Jing Shen > > Data Communication Center > HangZhou TeleCom > HangZhou ZJ 310027 > P.R.China > > ' spamcontrol ' > > __________________________________________________ > Do You Yahoo!? > Tired of spam? Yahoo! Mail has the best spam protection around > http://mail.yahoo.com -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Brian E Carpenter Distinguished Engineer, Internet Standards & Technology, IBM NEW ADDRESS <brc@zurich.ibm.com> PLEASE UPDATE ADDRESS BOOK _______________________________________________ Diffserv-interest mailing list Diffserv-interest@ietf.org https://www1.ietf.org/mailman/listinfo/diffserv-interest
- [Diffserv-interest] Re: Diffserv-interest digest,… John H. Shuler
- Re: [Diffserv-interest] Re: Diffserv-interest dig… Brian E Carpenter
- Re: [Diffserv-interest] Re: Diffserv-interest dig… John H. Shuler
- Re: [Diffserv-interest] Re: Diffserv-interest dig… Jing Shen
- Re: [Diffserv-interest] Re: Diffserv-interest dig… Brian E Carpenter
- [Diffserv-interest] Overbooking John H. Shuler