From nobody Tue Jan 26 20:21:53 2021 Return-Path: X-Original-To: tcpm@ietfa.amsl.com Delivered-To: tcpm@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 87AEF3A1209; Tue, 26 Jan 2021 20:21:51 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.319 X-Spam-Level: X-Spam-Status: No, score=-1.319 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, SPF_HELO_NONE=0.001, SPF_NEUTRAL=0.779, URIBL_BLOCKED=0.001] autolearn=no autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=strayalpha.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 OiwftAqD-pMM; Tue, 26 Jan 2021 20:21:50 -0800 (PST) Received: from server217-2.web-hosting.com (server217-2.web-hosting.com [198.54.115.98]) (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 EC9D03A1208; Tue, 26 Jan 2021 20:21:49 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=strayalpha.com; s=default; h=To:References:Message-Id: Content-Transfer-Encoding:Cc:Date:In-Reply-To:From:Subject:Mime-Version: Content-Type:Sender:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=pdRSg8tnYWG1MzZ2S79qHBDUjzNCd6SFdiG2r3R/o2w=; b=Tr64u9195Y4k0wkTNMqOdC8t0 9Bwgb7ypzRoOrk0nb7gpq1NqpjL8qdojpodeUMVTle4VErEhKhxfsVUBy6oQNq3nNysIcnCAwd7E5 FIyyi+pKm6Spk3dC2Zw5Dn+IoHsjzlzR59rf4Gn5X6ko6w6VwKG8PZ+optpN2a3cYZzIOC9x5onHd Z6Yu3HgxbjT6UW6viVfMNirnJ9Cf12zqZb5KpQ4IF9ynaMhkn6CGdooPtTb2XdKnQO8+4v89cHXj+ P6jCbgo+11laJp/ExvTtBbMyfiK+QCOrC8FALENenZSglXQ2qYr4dNYPkf7syFO+KVRiQS+Dw8PMz 8o4lPqNrA==; Received: from cpe-172-250-225-198.socal.res.rr.com ([172.250.225.198]:51636 helo=[192.168.1.14]) by server217.web-hosting.com with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.93) (envelope-from ) id 1l4cKr-002Cyy-RY; Tue, 26 Jan 2021 23:21:46 -0500 Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 14.0 \(3654.40.0.2.32\)) From: Joseph Touch In-Reply-To: Date: Tue, 26 Jan 2021 20:21:42 -0800 Cc: tcpm IETF list , "Scheffenegger, Richard" , Michael Tuexen , Mirja Kuehlewind , tcpm-chairs@ietf.org Content-Transfer-Encoding: quoted-printable Message-Id: <8B6B13CD-94B5-4C0B-8771-F008C390A661@strayalpha.com> References: <2A6CB682-8D99-48AE-A053-1685BA480BB3@apple.com> <880A9E0C-FBC9-4ADC-A11D-C5D3FDDDCE14@strayalpha.com> To: Vidhi Goel X-Mailer: Apple Mail (2.3654.40.0.2.32) X-OutGoing-Spam-Status: No, score=-1.0 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - server217.web-hosting.com X-AntiAbuse: Original Domain - ietf.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - strayalpha.com X-Get-Message-Sender-Via: server217.web-hosting.com: authenticated_id: touch@strayalpha.com X-Authenticated-Sender: server217.web-hosting.com: touch@strayalpha.com X-Source: X-Source-Args: X-Source-Dir: X-From-Rewrite: unmodified, already matched Archived-At: Subject: Re: [tcpm] AccECN field order X-BeenThere: tcpm@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: TCP Maintenance and Minor Extensions Working Group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 27 Jan 2021 04:21:52 -0000 > On Jan 26, 2021, at 7:47 PM, Vidhi Goel = wrote: >=20 >> Please see my note from 12/3/20, which shows how a single codepoints = would suffice without increasing length.=20 >=20 > If the TCP option code points is not a scarce resource, They are. Very much so. > then why not just keep it simple with "two different codepoints=E2=80=9D= ? Is there a reason that you think we should use only one code point? That=E2=80=99s the core of the discussion we=E2=80=99ve been having. > Regarding your suggestion of using 1 bit from the 24-bit counter = field, do you mean specify ordering once before the first ECN counter = field or specify before every counter field? > For example, if all three counters are present, are you suggesting, a) = or b)? To me b) would make more sense but that makes the implementation = complex as the fields have different length. >=20 > a) Kind | Length | 1-bit ordering | 23-bit EE1B | 1-bit ordering | = 23-bit ECEB | 1-bit ordering | 23-bit EE0B > b) Kind | Length | 1-bit ordering | 23-bit EE1B | 24-bit ECEB | 24-bit = EE0B The point of the bit is to encode the different kinds. (b) does this = just fine. If we want all three counters to be the same length, simply = do so and require the other two =E2=80=9Cfirst bits=E2=80=9D to be zero. Joe