Re: [tsvwg] Stephen Farrell's No Objection on draft-ietf-tsvwg-diffserv-intercon-12: (with COMMENT)
<Ruediger.Geib@telekom.de> Mon, 05 December 2016 16:07 UTC
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From: Ruediger.Geib@telekom.de
To: David.Black@dell.com, brian.e.carpenter@gmail.com, stephen.farrell@cs.tcd.ie
Thread-Topic: [tsvwg] Stephen Farrell's No Objection on draft-ietf-tsvwg-diffserv-intercon-12: (with COMMENT)
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Date: Mon, 05 Dec 2016 16:01:48 +0000
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Cc: gorry@erg.abdn.ac.uk, iesg@ietf.org, tsvwg-chairs@ietf.org, draft-ietf-tsvwg-diffserv-intercon@ietf.org, tsvwg@ietf.org
Subject: Re: [tsvwg] Stephen Farrell's No Objection on draft-ietf-tsvwg-diffserv-intercon-12: (with COMMENT)
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Yes, rewording without judgement is better. Thanks, Ruediger -----Ursprüngliche Nachricht----- Von: Black, David [mailto:David.Black@dell.com] Gesendet: Freitag, 2. Dezember 2016 02:00 An: Brian E Carpenter; Stephen Farrell; The IESG Cc: gorry@erg.abdn.ac.uk; tsvwg-chairs@ietf.org; draft-ietf-tsvwg-diffserv-intercon@ietf.org; tsvwg@ietf.org; Black, David Betreff: RE: [tsvwg] Stephen Farrell's No Objection on draft-ietf-tsvwg-diffserv-intercon-12: (with COMMENT) > But "poor" is a judgment call, so Stephen has a point. s/poor/unusual/ > would be factual. Sure, or something like "has not been widely deployed in practice." Thanks, --David > -----Original Message----- > From: Brian E Carpenter [mailto:brian.e.carpenter@gmail.com] > Sent: Thursday, December 01, 2016 2:54 PM > To: Black, David; Stephen Farrell; The IESG > Cc: gorry@erg.abdn.ac.uk; tsvwg-chairs@ietf.org; > draft-ietf-tsvwg-diffserv- intercon@ietf.org; tsvwg@ietf.org > Subject: Re: [tsvwg] Stephen Farrell's No Objection on > draft-ietf-tsvwg-diffserv- > intercon-12: (with COMMENT) > > On 02/12/2016 04:38, Black, David wrote: > > Hi Stephen, > > > > We may be talking past each other - the "has proven to be a poor > > operational practice" statement is intended to be a "running code" > > observation that Joel (OPS AD) should be able to confirm. > > As a former diffserv WG chair: > > When we put that provision into the original diffserv model, we were > trying to give diffserv a chance of running end to end via ISPs that > didn't support diffserv - effectively by saying that those ISPs would > provide default service for the packets concerned. But in practice, > ISPs that have done anything at all about diffserv (i.e. have not > simply run their routers with factory defaults) have mainly *chosen* > to zero any DSCPs that they don't explicitly support, to prevent > unexpected behaviours. I don't think that statement requires > consensus, because it's a fact. > > But "poor" is a judgment call, so Stephen has a point. s/poor/unusual/ > would be factual. > > Brian > > > > > If you would like to see "rough consensus" on this, I may need to > > dust off my Kevlar (fire-resistant) vest ;-). > > > > Thanks, --David > > > >> -----Original Message----- > >> From: Stephen Farrell [mailto:stephen.farrell@cs.tcd.ie] > >> Sent: Thursday, December 01, 2016 10:32 AM > >> To: Black, David; The IESG > >> Cc: gorry@erg.abdn.ac.uk; tsvwg-chairs@ietf.org; > >> draft-ietf-tsvwg-diffserv- intercon@ietf.org; tsvwg@ietf.org > >> Subject: Re: Stephen Farrell's No Objection on > >> draft-ietf-tsvwg-diffserv- > intercon- > >> 12: (with COMMENT) > >> > >> > >> Hi David, > >> > >> On 01/12/16 15:12, Black, David wrote: > >>> Stephen, > >>> > >>> Thanks for the review and interest in this draft. > >>> > >>> Diffserv Intercon could become a standard, although I'd really > >>> like to see > >> broader operator interest before going there. > >>> > >>> On the "bad operational practice" point - the evidence is the > >>> widespread > >> operator deployment of "bleaching" > >>> DSCPs to zero at network interconnects. We could cite RFC 7657, > >>> which > >> contains this text in Section 3.2 > >>> on that point: > >>> > >>> So, for two arbitrary network endpoints, there can be no assurance > >>> that the DSCP set at the source endpoint will be preserved and > >>> presented at the destination endpoint. Rather, it is quite likely > >>> that the DSCP will be set to zero (e.g., at the boundary of a network > >>> operator that distrusts or does not use the DSCP field) or to a value > >>> deemed suitable by an ingress classifier for whatever network 5-tuple > >>> it carries. > >>> > >>> Would that help? > >> > >> Not really, but not because it's a bad thing to add:-) > >> > >> The thing I don't get is whether or not the claim in the document > >> is something that has IETF consensus or not. That's because I'm > >> ignorant about that topic, so I'm just as happy to believe you when > >> you tell me that it's fine, without text changes. > >> > >> Cheers, > >> S. > >> > >>> > >>> Thanks, --David > >>> > >>>> -----Original Message----- > >>>> From: Stephen Farrell [mailto:stephen.farrell@cs.tcd.ie] > >>>> Sent: Thursday, December 01, 2016 8:59 AM > >>>> To: The IESG > >>>> Cc: draft-ietf-tsvwg-diffserv-intercon@ietf.org; Gorry Fairhurst; > >>>> tsvwg- chairs@ietf.org; gorry@erg.abdn.ac.uk; tsvwg@ietf.org > >>>> Subject: Stephen Farrell's No Objection on > >>>> draft-ietf-tsvwg-diffserv- > intercon- > >> 12: > >>>> (with COMMENT) > >>>> > >>>> Stephen Farrell has entered the following ballot position for > >>>> draft-ietf-tsvwg-diffserv-intercon-12: No Objection > >>>> > >>>> When responding, please keep the subject line intact and reply to > >>>> all email addresses included in the To and CC lines. (Feel free > >>>> to cut this introductory paragraph, however.) > >>>> > >>>> > >>>> Please refer to > >>>> https://www.ietf.org/iesg/statement/discuss-criteria.html > >>>> for more information about IESG DISCUSS and COMMENT positions. > >>>> > >>>> > >>>> The document, along with other ballot positions, can be found here: > >>>> https://datatracker.ietf.org/doc/draft-ietf-tsvwg-diffserv-interc > >>>> on/ > >>>> > >>>> > >>>> > >>>> ----------------------------------------------------------------- > >>>> ----- > >>>> COMMENT: > >>>> ----------------------------------------------------------------- > >>>> ----- > >>>> > >>>> > >>>> - I'm puzzled by this being informational, it sure seems like > >>>> something that could/should be a standard. (I'm not objecting, > >>>> just puzzled.) > >>>> > >>>> - Section 2: For an IETF consensus document wouldn't it be good > >>>> to have some references for claims like "has proven to be a poor > >>>> operational practice"? Is that actually a statement where we're > >>>> confident of IETF consensus? (I have no clue, I'm just checking > >>>> based on the language and the Informational RFC status.) > >>>> > >>> > >
- [tsvwg] Stephen Farrell's No Objection on draft-i… Stephen Farrell
- Re: [tsvwg] Stephen Farrell's No Objection on dra… Black, David
- Re: [tsvwg] Stephen Farrell's No Objection on dra… Stephen Farrell
- Re: [tsvwg] Stephen Farrell's No Objection on dra… Black, David
- Re: [tsvwg] Stephen Farrell's No Objection on dra… Brian E Carpenter
- Re: [tsvwg] Stephen Farrell's No Objection on dra… Black, David
- Re: [tsvwg] Stephen Farrell's No Objection on dra… joel jaeggli
- Re: [tsvwg] Stephen Farrell's No Objection on dra… Ruediger.Geib
- Re: [tsvwg] Stephen Farrell's No Objection on dra… Tim Chown