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Re: QUIC ossification

Christian Huitema <huitema@huitema.net> Thu, 14 February 2019 01:57 UTC

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To: Spencer Dawkins at IETF <spencerdawkins.ietf@gmail.com>, Roberto Peon <fenix@fb.com>
Cc: Ted Hardie <ted.ietf@gmail.com>, David Benjamin <davidben@google.com>, Martin Duke <martin.h.duke@gmail.com>, Ian Swett <ianswett=40google.com@dmarc.ietf.org>, David Schinazi <dschinazi.ietf@gmail.com>, Mikkel Fahnøe Jørgensen <mikkelfj@gmail.com>, "quic@ietf.org" <quic@ietf.org>, Martin Thomson <mt@lowentropy.net>
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From: Christian Huitema <huitema@huitema.net>
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Date: Wed, 13 Feb 2019 15:56:57 -1000
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Subject: Re: QUIC ossification
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On 2/13/2019 12:21 PM, Spencer Dawkins at IETF wrote:

> Hi, Roberto, 
>
> On Wed, Feb 13, 2019 at 3:52 PM Roberto Peon <fenix@fb.com
> <mailto:fenix@fb.com>> wrote:
>
>     Better that they have to explicitly block than they accidentally
>     block?
>
>
> Well, right, but I'm not sure why someone accidentally blocking
> (especially QUICv1) is less likely to do that because we created a
> registry. 
>
> But I asked Christian a question just before the IAB telechat today,
> so I should probably wait to give him a chance to explain what he was
> thinking.


OK, back to basics. The middle-boxes will only not do something if it
hurts them. Blocking a little guy or blocking some experiment will not
hurt them, because there will be few complaints. Blocking Google or some
other big site, on the other hand, yes that could hurt -- calls to
support line, complaints from ISP who bought the box, etc. So the
version will only not ossify if the big players grease it in a
meaningful way, or change it frequently.

There are two plausible ways there. One would be a "version of the
month", with at least a change in the clear text encryption key. The
other would be "versions for extensions", tied to for example the
negotiation of new transport parameters. In both cases, having something
like an IANA registry for the version number would help.

-- Christian Huitema

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