Re: [tsvwg] plan for L4S issue #29

Wesley Eddy <wes@mti-systems.com> Thu, 01 October 2020 15:33 UTC

Return-Path: <wes@mti-systems.com>
X-Original-To: tsvwg@ietfa.amsl.com
Delivered-To: tsvwg@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 5F4253A0B6B for <tsvwg@ietfa.amsl.com>; Thu, 1 Oct 2020 08:33:08 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.113
X-Spam-Level:
X-Spam-Status: No, score=-2.113 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, NICE_REPLY_A=-0.213, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=mti-systems-com.20150623.gappssmtp.com
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id SRB1BJFFZd4o for <tsvwg@ietfa.amsl.com>; Thu, 1 Oct 2020 08:33:07 -0700 (PDT)
Received: from mail-qv1-xf2a.google.com (mail-qv1-xf2a.google.com [IPv6:2607:f8b0:4864:20::f2a]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 120BE3A0AC3 for <tsvwg@ietf.org>; Thu, 1 Oct 2020 08:33:07 -0700 (PDT)
Received: by mail-qv1-xf2a.google.com with SMTP id db4so3174467qvb.4 for <tsvwg@ietf.org>; Thu, 01 Oct 2020 08:33:07 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mti-systems-com.20150623.gappssmtp.com; s=20150623; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-transfer-encoding:content-language; bh=hEx/lzKbDsP0nKfZkvPdVenll/fMSPlJx49DzMBGYq4=; b=zDfO26XSiqGuAdRT58FNW7m99hTH4XdXAMdoAeq7OBaUfFTWgT2WsIn9NzsSeP1yfc hHijb75Us/YqCsf6L0v6HM2LSSSaFbjnPMqcn8yJWIOMP9WwSNe3WKt/NOUMkuXTKbGG KThdoc6iUNP/NpVJ8pxQE1svW9SQdWU6lyaD1mHCsyMAWf00S9KGgqEvjKPzBC1qNsyg fl4xJVf5EBz27m/1DwqEtQFJLcK2rXvJP7b/wYg4hUgQF9Rn+MTR5koW0lf2Yh+f+q4x m59HF5a6ZS5bLqdpQqAro42rQI4nooqhd3rA+Lcuei1mbXAqs/HlmAOq+GJvieS9f6mm tcMw==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-transfer-encoding :content-language; bh=hEx/lzKbDsP0nKfZkvPdVenll/fMSPlJx49DzMBGYq4=; b=SvQkVMrOGm/ToDZdfDlhAz4VdqzncvGcZGu428Zfym7Vew382tymScGOza4mBxb4X8 baFusp5HwFtEbkxryzasLBPrFdYgunDIm2N43m0Jzia3+klqJfioC9+Ck9IwjbGTq+u/ BlpDjdBvkPfWow2T2iTkEtKRFpZAmmxq6LQer+zpL6aCJ9aGly+PtNgsqQoRUKEpkMYl DQ4VVVag63BM1kEzK8IRpi4NhEv0qPg/mH8CrHZ0mm1ItmxIMBaq9v19wD4N2hz6uzGP pK6/meCDrUsjhdSOcxn/MeAz3aUdi0fDagFgTyYarrQ3XhOvtGpm7QPVOeL3KJk5jHwG cdLw==
X-Gm-Message-State: AOAM533PsFgRx4EwSnkCg/5DJjV56Yi2Rt2RRTMeE75XRXZ6sPjPPUwn gWDzTa3/9z4QrfRuXJHfTuD4+Q==
X-Google-Smtp-Source: ABdhPJxjqxA7lq/CF0318ZE4lzI3+SMzyqTETQUhJL6pbSrChfShrxyTnbPyTaf31L5A2kCBI7dwTw==
X-Received: by 2002:a0c:f6c4:: with SMTP id d4mr8214325qvo.41.1601566385979; Thu, 01 Oct 2020 08:33:05 -0700 (PDT)
Received: from [192.168.1.7] (user-12l31c7.cable.mindspring.com. [69.81.133.135]) by smtp.gmail.com with ESMTPSA id p187sm6427363qkd.129.2020.10.01.08.33.04 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 01 Oct 2020 08:33:05 -0700 (PDT)
To: Sebastian Moeller <moeller0@gmx.de>
Cc: Greg White <g.white@CableLabs.com>, Gorry Fairhurst <gorry@erg.abdn.ac.uk>, "tsvwg@ietf.org" <tsvwg@ietf.org>, Mikael Abrahamsson <swmike=40swm.pp.se@dmarc.ietf.org>
References: <202009291549.08TFnvFV068509@gndrsh.dnsmgr.net> <c7080365-233c-5f1e-ef5c-1f42c969042a@erg.abdn.ac.uk> <73562E45-3EE7-43D4-B26B-76478AE19AF8@cablelabs.com> <C68807B2-EF30-4263-BD66-29106C62261D@gmx.de> <782d1848-db56-a6b2-0901-62bdcf844386@mti-systems.com> <CBB93DCD-84B8-4609-828C-D4EE94269B27@gmx.de>
From: Wesley Eddy <wes@mti-systems.com>
Message-ID: <b888cdd1-3884-28c1-8d5b-59f8f6fab730@mti-systems.com>
Date: Thu, 01 Oct 2020 11:33:02 -0400
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.12.0
MIME-Version: 1.0
In-Reply-To: <CBB93DCD-84B8-4609-828C-D4EE94269B27@gmx.de>
Content-Type: text/plain; charset="utf-8"; format="flowed"
Content-Transfer-Encoding: 8bit
Content-Language: en-US
Archived-At: <https://mailarchive.ietf.org/arch/msg/tsvwg/RvwUjnmJMLeOdwGg9-5As9zzpxU>
Subject: Re: [tsvwg] plan for L4S issue #29
X-BeenThere: tsvwg@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Transport Area Working Group <tsvwg.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/tsvwg>, <mailto:tsvwg-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/tsvwg/>
List-Post: <mailto:tsvwg@ietf.org>
List-Help: <mailto:tsvwg-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/tsvwg>, <mailto:tsvwg-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 01 Oct 2020 15:33:08 -0000

I am not sure if your questions are for me or others, but responding to 
the specific questions:

On 10/1/2020 3:05 AM, Sebastian Moeller wrote:
> [SM] Before this de-rails any further into abstract concepts, could you please answer a few questions:
>
> 1) Why you consider it essential for these safety tests that the L4S drafts reach RFC status first? Put differently, what unsurmountable obstacles exist today that make it impossible for the required safety tests to be performed right now?

I haven't heard anyone state this.  Many people have expressed that they 
are eager for wider experimentation.  I don't know where the word 
'required' is coming from in your question, but it sounds like your own 
requirement rather than something these people agree with.


> 2) And on the topic of failure, will the WG commit to a set of criteria up-front to assess whether a potential L4S experiment succeeded or failed?

I think the operational document Greg has started editing will be 
capturing the collected thoughts on what people working with L4S in 
their networks should be looking for.   But I'm doubtful this is what 
you're asking for, since you seem to be after more of a global pass/fail 
flag on all of L4S, if I understand correctly.  I don't recall seeing 
such in any other Exp. RFC, so it seems unusual to expect.


> 3) What to do in the case of failure? Do you consider it out of scope for the WG to require the L4S drafrs ot include explicit section how to un-roll the experiment in case of failure and the expected longer-term side-effects? If no, pleas elaborate why?

I think this would be good scope for the operational document. There 
have been some discussions in the working group, and getting the ideas 
matured and into a draft seems like it would be productive.


At higher level, the thread has diverged significantly from issue #29 
subject matter and I think lost that focus.