Re: [tsvwg] [saag] TSVWG WGLC: draft-ietf-tsvwg-transport-encrypt-08, closes 23 October 2019

"Lubashev, Igor" <ilubashe@akamai.com> Tue, 15 October 2019 21:32 UTC

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From: "Lubashev, Igor" <ilubashe@akamai.com>
To: Tom Herbert <tom@herbertland.com>, Joe Touch <touch@strayalpha.com>
CC: Christian Huitema <huitema@huitema.net>, "tsvwg@ietf.org" <tsvwg@ietf.org>
Thread-Topic: [tsvwg] [saag] TSVWG WGLC: draft-ietf-tsvwg-transport-encrypt-08, closes 23 October 2019
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Date: Tue, 15 Oct 2019 21:32:22 +0000
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Subject: Re: [tsvwg] [saag] TSVWG WGLC: draft-ietf-tsvwg-transport-encrypt-08, closes 23 October 2019
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> On Sat, Oct 12, 2019 at 12:02 PM Tom Herbert <tom@herbertland.com> wrote:
> 
> I do believe that there will be valid use cases for hosts to signal the network
> for services. There is a least one robust, explicit, and transport agnostic
> method to allow hosts to signal the network with transport related
> information and even application layer information-- that's Hop-by-Hop
> Options extension header. A critical difference with parsing transport layers,
> is that the end host is in control of what information is exposed in HBH
> options. As I've said several times, I believe this draft is missing on the
> opportunity to propose this as the "solution" to middleboxes losing visibility
> because of encryption.

+1
An explicit signal-to-network, such as IPv6 HBH option, is architecturally far superior to a hotch-podge of protocol-specific signals.  I think it would be great for this draft to encourage design and standardization of such explicit signal.

We know too well, unfortunately, that such signal, IPv6 HBH option, will not work for most of Internet traffic today (IPv4 traffic and IPv6 traffic flowing over links blocking IPv6 HBH option). The speed with which we can deploy encrypted-header protocols (i.e. QIUC) and a reliable explicit-signal-to-network HBH option differ greatly. What are we to do in the interim?

> Tom

- Igor