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RE: ECN support in QUIC

Ingemar Johansson S <ingemar.s.johansson@ericsson.com> Thu, 22 December 2016 10:18 UTC

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From: Ingemar Johansson S <ingemar.s.johansson@ericsson.com>
To: Ian Swett <ianswett@google.com>
Subject: RE: ECN support in QUIC
Thread-Topic: ECN support in QUIC
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Date: Thu, 22 Dec 2016 10:18:43 +0000
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Hi

I decided that it is high time to get started with this after the holidays.
The prosed ECN TODO items are described in https://github.com/quicwg/base-drafts/issues/68 .

  *   ECN echo in protocol, preferrably as a mandatory to implement part, RFC7560 can provide with valuable input in the design
  *   ECN negotiation, the work on updated ECN semanticts in TSVWG should be addressed (L4S support)
  *   Fallback for in various failure cases, RFC6679 and draft-kuehlewind-tcpm-ecn-fallback-01 may provide input
  *   Address user space limitation, collect best current practice to read/write ECN bits for different OS.
  *   Align meaning of ECN-CE marking of ECT(0) and ECT(1) traffic with TSVWG

My thinking is that it is perhaps best to start with a draft that describes how these TODOs are solved ?. As it evolves, select parts of it can be moved  to the applicable WG drafts, most likely this ECN in QUIC can silently expire unless there are parts that don’t fit in an existing WG draft.
Does this sound reasonable ?

/Ingemar

From: Ian Swett [mailto:ianswett@google.com]
Sent: den 3 december 2016 16:40
To: Ingemar Johansson S <ingemar.s.johansson@ericsson.com>
Cc: quic@ietf.org
Subject: Re: ECN support in QUIC

Good point, I added an open issue for ECN.  Feel free to add any comments there.

https://github.com/quicwg/base-drafts/issues/68

On Fri, Dec 2, 2016 at 7:09 AM, Ingemar Johansson S <ingemar.s.johansson@ericsson.com<mailto:ingemar.s.johansson@ericsson.com>> wrote:
Hi

I commented a little on  draft-iyengar-quic-loss-recovery-01
https://mailarchive.ietf.org/arch/msg/quic/qhYslAmlbPPCaF57Qm70_Trg4XQ
Realize that he draft was renamed to draft-ietf-quic-recovery shortly  after. I will read it and see if my comments are still valid.

I have one question though as regards to ECN support in QUIC, where will this be described. I can imagine that parts of it will go in quic-recovery but I assume that quic-transport needs an update for the protocol specifics, does the handshake and negotiation as well as possible fallback upon failure go there as well.

/Ingemar

==================================
Ingemar Johansson  M.Sc.
Master Researcher

Ericsson AB
Wireless Access Networks
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