Re: [Dcpel] questions related to DCPEL scope
Paulo Mendes <mendes@docomolab-euro.com> Fri, 03 March 2006 13:49 UTC
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Date: Fri, 03 Mar 2006 14:49:08 +0100
From: Paulo Mendes <mendes@docomolab-euro.com>
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To: Georgios Karagiannis <karagian@cs.utwente.nl>
Subject: Re: [Dcpel] questions related to DCPEL scope
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Hi Georgios, IMO, a state of the art study about centralized approaches should not have an impact on the DCPEL BOF/WG charter. The major reason is that the internetworking approach followed by IETF and other organizations, such as 3GPP, is different: IETF vision of internetworking was always more close to a distributed approach, while other organizations have been following a more centralized approach. Nevertheless, I agree that existing centralized resource management approaches should be analyzed. But, IMO, this should be done against the DCPEL requirements I-D. This is, if some of those approaches fulfill the requirements agreed within DCPEL, they (intact, changed or simplified) may be candidates to integrate a DiffServ control plane. But, I also want to stress that the DCPEL requirements I-D mention also distributed control approaches as suitable for the DiffServ control plane, following a more IETF way of doing internetworking. Cheers Paulo Georgios Karagiannis wrote: > Hi Kathie > > Please do not understand me wrong! > I am in favour of starting the DCPEL WG. > My concerns are related to the match between the DCPEL charter activities > and the work that has been by theITU-t, ETSI-tispan, DSL, packetcable, > 3gpp, 3gpp2, > ipshere, wimax goups on the area of centralized control plane > architectures. > I think that it is useful to start the work in DCPEL WG considering as > starting point > the work that has been done already in the other groups. > > Best Regards, > Georgios > > > > ----- Original Message ----- From: "Kathleen Nichols" > <nichols@pollere.com> > To: "Georgios Karagiannis" <karagian@cs.utwente.nl> > Cc: <dcpel@ietf.org> > Sent: Thursday, February 23, 2006 10:47 PM > Subject: Re: [Dcpel] questions related to DCPEL scope > > >> >> Trimmed to reply (in-line) to your comments: >> >> Georgios Karagiannis wrote: >> ... >> >>>> >> [G]>>> Could you specify what do you mean by a distributed Difsserv >> control >> >>>>> plane approach? Will this distributed approach impact an individual >>>>> Diffserv router, e.g., a Diffserv core router? >>>> >> [K]>> I'm just giving a short answer here. A distributed DiffServ >> control >> >>>> plane is one where the control plane actions do not reside in >>>> one physical location and probably not in one logical location. >>>> We would expect an impact on DiffServ edge routers, but probably >>>> not DiffServ core routers. >>> >>> >>> Georgios: But I suppose that this will of depend on the specified PDBs. >>> What if a PDB requires a control plane support for a core Diffserv >>> router? >>> >> >> If by core Diffserv router you mean a diffserv router interior to a >> domain, one would not normally expect the need for control of >> classifiers and policers, but just configuration of the PHBs as >> realized by queues and their scheduler, as described in RFC 2475 >> and other diffserv documents. However, this doesn't preclude an >> operator from using the diffserv "edge" functions interior to a >> network if desired. >> >> ... >> >>> Georgios: Maybe it is very useful to perform an extensive state of the >>> art study on the area of centralized control plane architectures that >>> are developed in ITU-t, ETSI-tispan, DSL, packetcable, 3gpp, 3gpp2, >>> ipshere, wimax. The outcome of this state of the art study could then >>> help to define >>> the final charter of the DCPEL BOF/WG. >>> >> >> Do you believe that the work of these groups obviates an IETF DCPEL WG? >> >> regards, >> Kathie >> > > > > _______________________________________________ > Dcpel mailing list > Dcpel@ietf.org > https://www1.ietf.org/mailman/listinfo/dcpel > _______________________________________________ Dcpel mailing list Dcpel@ietf.org https://www1.ietf.org/mailman/listinfo/dcpel
- [Dcpel] questions related to DCPEL scope Georgios Karagiannis
- Re: [Dcpel] questions related to DCPEL scope Kathleen Nichols
- Re: [Dcpel] questions related to DCPEL scope Georgios Karagiannis
- Re: [Dcpel] questions related to DCPEL scope Kathleen Nichols
- Re: [Dcpel] questions related to DCPEL scope Georgios Karagiannis
- Re: [Dcpel] questions related to DCPEL scope Paulo Mendes