Re: [tsvwg] L4S DSCP (was: L4S drafts: Next Steps)

Ruediger.Geib@telekom.de Wed, 24 March 2021 15:04 UTC

Return-Path: <Ruediger.Geib@telekom.de>
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 F127F3A2E46 for <tsvwg@ietfa.amsl.com>; Wed, 24 Mar 2021 08:04:30 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.348
X-Spam-Level:
X-Spam-Status: No, score=-2.348 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.251, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_NONE=0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=telekom.de
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 4j-Hr5jk0nVt for <tsvwg@ietfa.amsl.com>; Wed, 24 Mar 2021 08:04:26 -0700 (PDT)
Received: from mailout21.telekom.de (mailout21.telekom.de [194.25.225.215]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 130573A2E40 for <tsvwg@ietf.org>; Wed, 24 Mar 2021 08:04:25 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=telekom.de; i=@telekom.de; q=dns/txt; s=dtag1; t=1616598266; x=1648134266; h=from:to:cc:subject:date:message-id:references: in-reply-to:content-transfer-encoding:mime-version; bh=wnvqLRQ/HYdkmjk4mBehSTG6FqBb+cgehfmFNzeTISY=; b=QZ1/kYMSp3nRIzwoimTlTqzmadPXsiv5A8bOoBHNtgHcQXtr66tC1EHw UyIrB0EyLa04JB1guUZv3mmtc21KtfBLa0FTWM9rNLJL08IYwIluNMc1a H+H0L+Ipeazkxl2dWsP1hS408JlO6CZ3YhcH0eTG0JNX6Nm1K/utdBSg/ OWGDZpfNcijq5juU4X7DRpRbNiyNj0sjN517jUAroF5JujOQ3i5i5/16I wl0Z0vxk0mcShOd7nwiz8elLyiUfW3t6e4y/7mqGG5FKo7LPNSzCUo4eg Eg8Hqbtc99lW6zpjez/IU2mlIrl9HW2vAyUBf5+6Qe2RTbCHY1AOouZBp A==;
IronPort-SDR: J4Cl8kmT8eUapJJjznl2O1LIZ/bPIimJHGt4ZPxWezo+qdaRZesGmHIQZRlaPF53/tyM50I9Gu VeSDvWG4ursQ==
IronPort-HdrOrdr: A9a23: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
Received: from qdec94.de.t-internal.com ([10.171.255.41]) by MAILOUT21.dmznet.de.t-internal.com with ESMTP/TLS/ECDHE-RSA-AES128-GCM-SHA256; 24 Mar 2021 16:04:22 +0100
IronPort-SDR: gGXlOPSYWhBh7wzrvzPbmbvAT+GVHp55GeXUTncF/fszbAonnBo5/AlJlhFYm4i65bfxezWX9u hphpyyx2k1qYn8hxxRkZ03iN7daaIRzIo=
X-IronPort-AV: E=Sophos;i="5.81,274,1610406000"; d="scan'208";a="304216887"
X-MGA-submission: MDFBBOcd+uds5VnIPYIRit9xcCMbVa6q7V90G9idUEPZzXxOBQitS8ZcnV2YkpwIe1nojk/hscXtefdIErC4tBPq/K1jkq97r5Umgpjh5jQwOgsRqttjcSxfn9yLdJWT712ZEj9lCTS1ND/VQXY2n+ODtDszHpYvOQ7lT8MdlQSVng==
Received: from he105715.emea1.cds.t-internal.com ([10.169.118.51]) by QDEC97.de.t-internal.com with ESMTP/TLS/ECDHE-RSA-AES128-SHA256; 24 Mar 2021 16:04:22 +0100
Received: from HE105715.EMEA1.cds.t-internal.com (10.169.118.51) by HE105715.emea1.cds.t-internal.com (10.169.118.51) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 24 Mar 2021 16:04:21 +0100
Received: from HE106564.emea1.cds.t-internal.com (10.171.40.16) by HE105715.EMEA1.cds.t-internal.com (10.169.118.51) with Microsoft SMTP Server (TLS) id 15.0.1497.2 via Frontend Transport; Wed, 24 Mar 2021 16:04:21 +0100
Received: from DEU01-BE0-obe.outbound.protection.outlook.com (104.47.7.177) by O365mail01.telekom.de (172.30.0.234) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 24 Mar 2021 16:04:17 +0100
ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=ARjx9DFvrrQY1Y1KncSchS1nCSWyOzvUeFVu0tE2Kwtx0QURodlT2JoOmHwbTImyNhLsQ/lLaJIMS1uLRDazOvFmd6J0F9OT578+D49tmOZ4u3uCoIKmBsvVtSk4kSl4GyyxQLzmXo8jEj3Md07yXsqFg+tXjvG3qIjFbFXgoHNByizPWbO94b8eFwgHNWHiqNn17BWvl1DFTWMs3Qv0B/8DoAWZdlDBz44BJWMDnoAvhXRXbb3AZSHD2HUwAh2hEvbSgjIdoK/7nH5mrPamellmZGXnYVlyvEfgqHC5+UlY0jj1co+VyMI1B5BU8ne/nkieHth/nNH58bj4JcdvHg==
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=wnvqLRQ/HYdkmjk4mBehSTG6FqBb+cgehfmFNzeTISY=; b=H9TgyHI2Xb8UWEGayiAe4knRa0GGIMY+oP7yJnACxfBSpo5nyhJrud+tfOdPLN+Lc35pJMQbKQ3Fdy2mdhqkRPnJuLPtfawVeE2JuE59YXiMeauBWDsMgA2DxDIGXDPdERl+Gzt/vhn+WToVo8NYflWDf5EZk1KW6VmxyEPwlyuzCCxd3YHc0m0g1FDb3NNM4yGMu+UyVRfCYCSUhl+Dti7YQiX4AuaOwdhxPhrWfkKa6uAr6aXU7PTcUJCHJArcLSuEeN6lCM1v9J1oRhTvaNPY55CzLGMCfxbspD9zAJC8yJY9a35NdGUndXXvCywTMkvMX+BkMsFwVXqxIa0DFA==
ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=telekom.de; dmarc=pass action=none header.from=telekom.de; dkim=pass header.d=telekom.de; arc=none
Received: from FRYP281MB0112.DEUP281.PROD.OUTLOOK.COM (2603:10a6:d10:2::11) by FR2P281MB0372.DEUP281.PROD.OUTLOOK.COM (2603:10a6:d10:3b::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3977.9; Wed, 24 Mar 2021 15:04:20 +0000
Received: from FRYP281MB0112.DEUP281.PROD.OUTLOOK.COM ([fe80::e40f:c4ab:db76:e885]) by FRYP281MB0112.DEUP281.PROD.OUTLOOK.COM ([fe80::e40f:c4ab:db76:e885%3]) with mapi id 15.20.3977.025; Wed, 24 Mar 2021 15:04:20 +0000
From: Ruediger.Geib@telekom.de
To: gorry@erg.abdn.ac.uk
CC: tsvwg@ietf.org
Thread-Topic: [tsvwg] L4S DSCP (was: L4S drafts: Next Steps)
Thread-Index: AdcfUdg330SgU1t/Rc2OwNBrVFfTigBIBcmAAAHwyGAAA3u2gAAD0ycAAAGJZAAAA6kjgAACNApwAABFtQAAAhp9UA==
Date: Wed, 24 Mar 2021 15:04:20 +0000
Message-ID: <FRYP281MB01127FA1395F5CD82E3B76E79C639@FRYP281MB0112.DEUP281.PROD.OUTLOOK.COM>
References: <HE1PR0701MB2299CB5A933F0C4BCB121F70C2639@HE1PR0701MB2299.eurprd07.prod.outlook.com> <8C9A54B1-8ACF-461E-B8F1-A6ED240870B5@erg.abdn.ac.uk> <145B3C2A-86CC-40ED-9F3B-7DE80D64D150@gmail.com> <f1ad733bde4cbc8da6bccac7a7535b805fff86e9.camel@heistp.net> <6cfad69b-dba8-609a-7f65-b24afcf17df1@erg.abdn.ac.uk> <MN2PR19MB404550070C30B6B314B5A2C083639@MN2PR19MB4045.namprd19.prod.outlook.com> <5832d95c-454d-3bb3-3b25-adf47747ef45@erg.abdn.ac.uk>
In-Reply-To: <5832d95c-454d-3bb3-3b25-adf47747ef45@erg.abdn.ac.uk>
Accept-Language: de-DE, en-US
Content-Language: de-DE
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
authentication-results: erg.abdn.ac.uk; dkim=none (message not signed) header.d=none;erg.abdn.ac.uk; dmarc=none action=none header.from=telekom.de;
x-originating-ip: [87.147.144.196]
x-ms-publictraffictype: Email
x-ms-office365-filtering-correlation-id: 8ac57504-4544-4c20-3363-08d8eed61a88
x-ms-traffictypediagnostic: FR2P281MB0372:
x-microsoft-antispam-prvs: <FR2P281MB037262E33F7656039E5D60D89C639@FR2P281MB0372.DEUP281.PROD.OUTLOOK.COM>
x-ms-oob-tlc-oobclassifiers: OLM:9508;
x-ms-exchange-senderadcheck: 1
x-microsoft-antispam: BCL:0;
x-microsoft-antispam-message-info: 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
x-forefront-antispam-report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:FRYP281MB0112.DEUP281.PROD.OUTLOOK.COM; PTR:; CAT:NONE; SFS:(39860400002)(376002)(396003)(136003)(346002)(366004)(85202003)(85182001)(55016002)(53546011)(296002)(7696005)(8936002)(71200400001)(6506007)(33656002)(64756008)(66476007)(76116006)(6916009)(66946007)(316002)(38100700001)(66556008)(66446008)(4326008)(52536014)(186003)(478600001)(2906002)(5660300002)(86362001)(9686003)(8676002)(26005)(66574015)(83380400001); DIR:OUT; SFP:1101;
x-ms-exchange-antispam-messagedata: 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
x-ms-exchange-transport-forked: True
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
MIME-Version: 1.0
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-AuthSource: FRYP281MB0112.DEUP281.PROD.OUTLOOK.COM
X-MS-Exchange-CrossTenant-Network-Message-Id: 8ac57504-4544-4c20-3363-08d8eed61a88
X-MS-Exchange-CrossTenant-originalarrivaltime: 24 Mar 2021 15:04:20.7564 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: bde4dffc-4b60-4cf6-8b04-a5eeb25f5c4f
X-MS-Exchange-CrossTenant-mailboxtype: HOSTED
X-MS-Exchange-CrossTenant-userprincipalname: o+8q2upttHP3MRY0p/KtM4Ay5OM381PTQbV9mV93A5eqdentH1t2C5E4B7Fe9PafF/hUDqyKLgWUanS0WsXqRFC6IReJwudVRktTSWLSj0U=
X-MS-Exchange-Transport-CrossTenantHeadersStamped: FR2P281MB0372
X-TM-SNTS-SMTP: 8A13C113B4F816929637AC7AECE8CC89241829D92917E5CC2175204D81A39C352000:8
X-OriginatorOrg: telekom.de
Archived-At: <https://mailarchive.ietf.org/arch/msg/tsvwg/AbwadRsKS1DrAB8x5WtZQmZunw8>
Subject: Re: [tsvwg] L4S DSCP (was: L4S drafts: Next Steps)
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: Wed, 24 Mar 2021 15:04:31 -0000

Hi Gorry,

My take was that a CDN or content owner might be interested in L4S and start experiments without asking operators for co-operation. Then innocent bystanders may get hit and a specified DSCP might allow for protection.

An operator testing L4S is likely able to find an environment where L4S doesn't create harm. A DSCP isn't required for such an experiment and if the operator desires to use one, standardization isn't a requirement, I guess.

Regards,

Ruediger

-----Ursprüngliche Nachricht-----
Von: tsvwg <tsvwg-bounces@ietf.org> Im Auftrag von Gorry Fairhurst
Gesendet: Mittwoch, 24. März 2021 14:57
An: Black, David <David.Black@dell.com>; Pete Heist <pete@heistp.net>; tsvwg@ietf.org
Betreff: Re: [tsvwg] L4S DSCP (was: L4S drafts: Next Steps)

On 24/03/2021 13:53, Black, David wrote:
>> The interaction with DSCPs was revisited in 2018 
>> (draft-briscoe-tsvwg-l4s-diffserv-00), after RFC8311 enabled such a 
>> deployment experiment using ECT(1).  That which explains how the two 
>> approaches interact, how they can be arranged to complement each 
>> other and in which cases one can stand alone without needing the other.
> My recollection is that this draft was not taken forward due to lack of interest at the time.
>
> Thanks, --David

True, the discussion of Diffserv goes has to date gone in cycles - with few (if any) operators stepping-up and saying that they would like to deploy L4S with a DSCP.

Gorry

>
> -----Original Message-----
> From: tsvwg <tsvwg-bounces@ietf.org> On Behalf Of Gorry Fairhurst
> Sent: Wednesday, March 24, 2021 8:47 AM
> To: Pete Heist; tsvwg@ietf.org
> Subject: Re: [tsvwg] L4S DSCP (was: L4S drafts: Next Steps)
>
>
> [EXTERNAL EMAIL]
>
> So injecting a little more history here.
>
> Some previous discussions are:
>
> The earliest discussion of L4S in the IETF that I recall was in 2015.
> When discussing, it was known that RFC4774 would allow experimentation 
> with a diffserv domain (e.g., as in RFC 6660), but the practicalities 
> of deploying an end-to-end Internet transport required an RFC to use a 
> method that was not protected by a DSCP. The discussion on whether the 
> ECN Plus a Diffserv Codepoint (DSCP) was also noted in the appendix of
> draft-briscoe-tsvwg-ecn-l4s-id-00 in 2015.  R
>
> Tradeoffs that lead to using ECT(1) were described in the proposal to 
> the AQM working group in draft-briscoe-aqm-dualq-coupled-00 in 2015.
>
> The interaction with DSCPs was revisited in 2018 
> (draft-briscoe-tsvwg-l4s-diffserv-00), after RFC8311 enabled such a 
> deployment experiment using ECT(1).  That which explains how the two 
> approaches interact, how they can be arranged to complement each other 
> and in which cases one can stand alone without needing the other.
>
> Gorry
>
> On 24/03/2021 11:01, Pete Heist wrote:
>> I'll just add to the sentiment that I think the use of DSCP is still 
>> worthy of consideration. Beyond the use of a single DSCP on all 
>> traffic, there may be other alternatives that address at least some 
>> of the concerns in B.4.
>>
>> Pete