Re: Note: WGLC Announcement for draft-ietf-tsvwg-byte-pkt-congest-07
John Leslie <john@jlc.net> Fri, 30 March 2012 15:50 UTC
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Date: Fri, 30 Mar 2012 11:50:02 -0400
From: John Leslie <john@jlc.net>
To: Gorry Fairhurst <gorry@erg.abdn.ac.uk>
Subject: Re: Note: WGLC Announcement for draft-ietf-tsvwg-byte-pkt-congest-07
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Gorry Fairhurst <gorry@erg.abdn.ac.uk> wrote: > > Please respond to the WGLC that ends on Friday 30th March 2012. > > Notes to the list would be helpful to complete the WGCC. I cannot support this draft as written. Perhaps some background would help... It will be no secret to anyone following the ConEx WG that Bob and I fundamentally disagree about whether to model congestion as per-packet or per-byte. I strongly believe that it's packets that are congested, and that we'll do better to accurately count congested packets than estimate congested bytes; Bob seems to strongly believe that we'll do better to estimate congested bytes than accurately count congested packets. When I previously skimmed this document, I believed it contained only common ground: that AQM should drop/mark packets without favoring small packets, and that to whatever extent packet size _is_ considered, that should be a transport-layer responsibility. Alas, when I read it carefully this week, I find that Bob is actually saying that transport-layer should _only_ consider "congested bytes", not "congested packets". In fact, Bob openly endorses replacing TCP congestion-control with an algorithm which calculates "fair-share bytes" and doesn't back off at all (even in the presence of 20% packet loss) unless you're already sending more than this "fair-share". I do not believe that is the consensus of this WG; and I believe if that were the consensus it would exceed our charter. The draft contains a number of things I _do_ support; and I'd be happy to support a considerably shorter draft which concentrates on the AQM recommendation, omitting any suggestions of modifying TCP congestion control. -- John Leslie <john@jlc.net>
- WGLC Announcement for draft-ietf-tsvwg-iana-ports… Gorry Fairhurst
- Re: WGLC Announcement for draft-ietf-tsvwg-iana-p… t.petch
- Re: WGLC Announcement for draft-ietf-tsvwg-iana-p… Magnus Westerlund
- Re: WGLC Announcement for draft-ietf-tsvwg-iana-p… t.petch
- Re: WGLC Announcement for draft-ietf-tsvwg-iana-p… Magnus Westerlund
- Re: WGLC Announcement for draft-ietf-tsvwg-iana-p… t.petch
- WGLC Announcement for draft-ietf-tsvwg-source-que… Gorry Fairhurst
- WGLC Announcement for draft-ietf-tsvwg-byte-pkt-c… Gorry Fairhurst
- Note: WGLC Announcement for draft-ietf-tsvwg-byte… Gorry Fairhurst
- Re: Note: WGLC Announcement for draft-ietf-tsvwg-… John Leslie
- RE: Note: WGLC Announcement for draft-ietf-tsvwg-… philip.eardley
- Re: Note: WGLC Announcement for draft-ietf-tsvwg-… Bob Briscoe
- Re: Note: WGLC Announcement for draft-ietf-tsvwg-… John Leslie
- Re: [tsvwg] Note: WGLC Announcement for draft-iet… Manner Jukka
- [tsvwg] WGLC Announcement for draft-ietf-tsvwg-sc… Gorry Fairhurst
- Re: [tsvwg] WGLC Announcement for draft-ietf-tsvw… Black, David
- [tsvwg] WGLC Announcement for draft-ietf-tsvwg-sc… Gorry Fairhurst
- Re: [tsvwg] WGLC Announcement for draft-ietf-tsvw… Michael Tuexen
- Re: [tsvwg] WGLC Announcement for draft-ietf-tsvw… Black, David
- Re: [tsvwg] WGLC Announcement for draft-ietf-tsvw… Michael Tuexen
- Re: [tsvwg] WGLC Announcement for draft-ietf-tsvw… Yoshifumi Nishida
- Re: [tsvwg] WGLC Announcement for draft-ietf-tsvw… Michael Tuexen
- Re: [tsvwg] WGLC Announcement for draft-ietf-tsvw… Michael Welzl
- Re: [tsvwg] WGLC Announcement for draft-ietf-tsvw… Michael Tuexen
- Re: [tsvwg] WGLC Announcement for draft-ietf-tsvw… Yoshifumi Nishida
- Re: [tsvwg] WGLC Announcement for draft-ietf-tsvw… Thomas Dreibholz
- Re: [tsvwg] WGLC Announcement for draft-ietf-tsvw… Thomas Dreibholz
- Re: [tsvwg] WGLC Announcement for draft-ietf-tsvw… Michael Welzl
- Re: [tsvwg] WGLC Announcement for draft-ietf-tsvw… Becke, Martin
- Re: [tsvwg] WGLC Announcement for draft-ietf-tsvw… Becke, Martin
- Re: [tsvwg] WGLC Announcement for draft-ietf-tsvw… Michael Welzl
- Re: [tsvwg] WGLC Announcement for draft-ietf-tsvw… Thomas Dreibholz
- Re: [tsvwg] WGLC Announcement for draft-ietf-tsvw… Thomas Dreibholz
- Re: [tsvwg] WGLC Announcement for draft-ietf-tsvw… Michael Tuexen
- Re: [tsvwg] WGLC Announcement for draft-ietf-tsvw… Michael Tuexen
- Re: [tsvwg] WGLC Announcement for draft-ietf-tsvw… Michael Welzl
- Re: [tsvwg] WGLC Announcement for draft-ietf-tsvw… Michael Tuexen
- Re: [tsvwg] WGLC Announcement for draft-ietf-tsvw… Michael Welzl
- Re: [tsvwg] WGLC Announcement for draft-ietf-tsvw… Anna Brunstrom
- Re: [tsvwg] WGLC Announcement for draft-ietf-tsvw… Irene Rüngeler
- Re: [tsvwg] WGLC Announcement for draft-ietf-tsvw… Michael Tuexen
- Re: [tsvwg] WGLC Announcement for draft-ietf-tsvw… Anna Brunstrom
- Re: [tsvwg] WGLC Announcement for draft-ietf-tsvw… Michael Tuexen
- [tsvwg] WGLC for draft-ietf-tsvwg-sctp-sack-immed… gorry
- Re: [tsvwg] WGLC for draft-ietf-tsvwg-sctp-sack-i… Michael Tuexen
- Re: [tsvwg] WGLC Announcement for draft-ietf-tsvw… Randy Stewart
- Re: [tsvwg] WGLC Announcement for draft-ietf-tsvw… Yoshifumi Nishida