Re: [Gen-art] Genart last call review of draft-ietf-lwig-tcp-constrained-node-networks-10

Alissa Cooper <alissa@cooperw.in> Thu, 22 October 2020 13:40 UTC

Return-Path: <alissa@cooperw.in>
X-Original-To: gen-art@ietfa.amsl.com
Delivered-To: gen-art@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 71AB83A0A6A; Thu, 22 Oct 2020 06:40:30 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.098
X-Spam-Level:
X-Spam-Status: No, score=-2.098 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_PASS=-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=cooperw.in header.b=S4daFSiP; dkim=pass (2048-bit key) header.d=messagingengine.com header.b=H4M8AoTz
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 1GPmY4Zkg-qB; Thu, 22 Oct 2020 06:40:29 -0700 (PDT)
Received: from out4-smtp.messagingengine.com (out4-smtp.messagingengine.com [66.111.4.28]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id D21C03A044A; Thu, 22 Oct 2020 06:40:28 -0700 (PDT)
Received: from compute3.internal (compute3.nyi.internal [10.202.2.43]) by mailout.nyi.internal (Postfix) with ESMTP id 258EE5C0124; Thu, 22 Oct 2020 09:40:28 -0400 (EDT)
Received: from mailfrontend2 ([10.202.2.163]) by compute3.internal (MEProxy); Thu, 22 Oct 2020 09:40:28 -0400
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cooperw.in; h= content-type:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; s=fm1; bh=E Dn6+GJyrdLW/Vr0Z5vWZLP8ySvNGvUpWMgMn/nq3Bc=; b=S4daFSiPcixUL1rGX ORSJA5uh4mj8itW0cMco0MqWgA3ydvWGaP1EDozR31G/A5WLi3e4qV4Gx+z+lyiX +cPc4GZwXTFYADvMmFK5L5S5DR2X3vSMGKctFgtiSnkhYnRQW06O6rA7hWCjF7qw BsVDMQUEqjvZFDRFwxWcVsaYcDcmDClXG7qpfS9g67y6brPOff1QZmecMYRXtdzk zhYEOR8jD3JXf/pJCnIPuLXnA4ySyF7Dh1MmZvnCnA46qFW4XAEo4aAmAz5FBgNB A0TJK50VBXIl9SBZWUIfhBjes47yrakIKhcBff6tHDWIwVcSmIEn1YZhNPbf8F9v DTbZQ==
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:content-type :date:from:in-reply-to:message-id:mime-version:references :subject:to:x-me-proxy:x-me-proxy:x-me-sender:x-me-sender :x-sasl-enc; s=fm1; bh=EDn6+GJyrdLW/Vr0Z5vWZLP8ySvNGvUpWMgMn/nq3 Bc=; b=H4M8AoTzai2vfMsbQhj1WaW+TRTV2hEruz/KBG5TupTRh4N0qB6eLgxJy 1Y2x7JeREgTmkw0sPDSH2WQKzUZKzAH8avCsOceqHIHxzT4C19tZEEnxgdUjv9aw EZapr6zWQ4n/RnSf8BgkD6d8Xsp8fy+k7s5wF5FUU4uTgWfzdfrFzmw33VewVRc0 TBHpAXY4jvl+eHmJKglFrd65B8dtFZaJyXbzzE8dscxiWPHVE/Fae+99iPL8iF8q +x2fFbZQMSSyWR3hCHaHgwC5jLBVzTEo0E2lg30mq6hP7sYSV8GnoeKaNBSCre6m 4NRnmzsSQioa6TL1C+AoFtE5OgeVQ==
X-ME-Sender: <xms:y4uRX57JuCbIa5d70DSvmvediatQmiUMoEViUWXBJZ9BSPZgT5qqyA> <xme:y4uRX27ob6sUMbflSmaLZ2736UY03JA2Mlu6WAMP69eZLy3NpKGO9KM4c0YHtL4Uq bL1PBdZAUds4LW49Q>
X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedujedrjeejgdeihecutefuodetggdotefrodftvf curfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfghnecu uegrihhlohhuthemuceftddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenuc fjughrpegtggfuhfgjfffgkfhfvffosehtqhhmtdhhtddvnecuhfhrohhmpeetlhhishhs rgcuvehoohhpvghruceorghlihhsshgrsegtohhophgvrhifrdhinheqnecuggftrfgrth htvghrnhepfeduhffgtefgtedvvdffiedutdekffegvdejjedtieehfefgleefuedtledv gffgnecuffhomhgrihhnpehivghtfhdrohhrghenucfkphepudejfedrfeekrdduudejrd ektdenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepmhgrihhlfhhrohhmpegr lhhishhsrgestghoohhpvghrfidrihhn
X-ME-Proxy: <xmx:y4uRXwcjQSo4hVYD53h4MfpRkBE6UFZv9a_V0108VFCyoH4S6THSsg> <xmx:y4uRXyKgiyQtrVTjnnclg5rh3h6K_nduJzLAbE9oL8aWj58D1EXdoQ> <xmx:y4uRX9J-7VgoXM2rDy_paF7ipphqYBaydBwmK4wy-HcstE1tZCKwuw> <xmx:zIuRX7jNtcz6W50sUq9BY98CR0lU4jWL-JsqeM3Cn7lhlKZgafYpnw>
Received: from rtp-alcoop-nitro2.cisco.com (unknown [173.38.117.80]) by mail.messagingengine.com (Postfix) with ESMTPA id 66EEA306467E; Thu, 22 Oct 2020 09:40:27 -0400 (EDT)
Content-Type: text/plain; charset="us-ascii"
Mime-Version: 1.0 (Mac OS X Mail 13.4 \(3608.120.23.2.4\))
From: Alissa Cooper <alissa@cooperw.in>
In-Reply-To: <160096886489.2330.10263440081874090089@ietfa.amsl.com>
Date: Thu, 22 Oct 2020 09:40:26 -0400
Cc: IETF Gen-ART <gen-art@ietf.org>, draft-ietf-lwig-tcp-constrained-node-networks.all@ietf.org, lwip@ietf.org
Content-Transfer-Encoding: quoted-printable
Message-Id: <7CBC0201-079F-4DE9-BDA8-311D04C96C91@cooperw.in>
References: <160096886489.2330.10263440081874090089@ietfa.amsl.com>
To: Linda Dunbar <linda.dunbar@futurewei.com>
X-Mailer: Apple Mail (2.3608.120.23.2.4)
Archived-At: <https://mailarchive.ietf.org/arch/msg/gen-art/hW-epY-b-uZspJ3aloAE89ytaKQ>
Subject: Re: [Gen-art] Genart last call review of draft-ietf-lwig-tcp-constrained-node-networks-10
X-BeenThere: gen-art@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: "GEN-ART: General Area Review Team" <gen-art.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/gen-art>, <mailto:gen-art-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/gen-art/>
List-Post: <mailto:gen-art@ietf.org>
List-Help: <mailto:gen-art-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/gen-art>, <mailto:gen-art-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 22 Oct 2020 13:40:31 -0000

Linda, thanks for your review. I think on both points you raise what the document proposes is well supported given the use case. I entered a No Objection ballot.

Alissa

> On Sep 24, 2020, at 1:34 PM, Linda Dunbar via Datatracker <noreply@ietf.org> wrote:
> 
> Reviewer: Linda Dunbar
> Review result: Almost Ready
> 
> I am the assigned Gen-ART reviewer for this draft. The General Area
> Review Team (Gen-ART) reviews all IETF documents being processed
> by the IESG for the IETF Chair.  Please treat these comments just
> like any other last call comments.
> 
> For more information, please see the FAQ at
> 
> <https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.
> 
> Document: draft-ietf-lwig-tcp-constrained-node-networks-10
> Reviewer: Linda Dunbar
> Review Date: 2020-09-24
> IETF LC End Date: 2020-09-30
> IESG Telechat date: Not scheduled for a telechat
> 
> Summary:
> This document describes the guidance on how to configure TCP parameters in the
> Constrained-Node-Networks.
> 
> Major issues:
> 4.1.2. recommends ECN to be used  in the Constrained Node networks. In any
> network, especially when many IoT devices are attached , the congestion can be
> very short lived. Having Constrained node supporting ECN can cause traffic
> oscillation.  In addition, not many deployed internet supports ECN, it can be
> waste of processing of the CNN nodes.
> 
> Section 4.1.1 recommend packet size to be 1280 for IPv6 to avoid the need to
> support Path MTU Discovery. it is problematic.  There are many layers of
> tunneling and encapsulation in today's network, (let's not even assume SR), the
> actual packet size can be much larger.  Supporting Path MTU Discovery is far
> less processing intensive than supporting ECN.
> 
> Minor issues:
> 
> Nits/editorial comments:
> 
> Cheers,
> 
> Linda Dunbar
> 
> 
> _______________________________________________
> Gen-art mailing list
> Gen-art@ietf.org
> https://www.ietf.org/mailman/listinfo/gen-art