IETF Logo Mail Archive

Re: [tcpm] RFC793bis draft 14 Reserved Bits

Joe Touch <touch@strayalpha.com> Thu, 28 November 2019 03:53 UTC

Return-Path: <touch@strayalpha.com>
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 E059A120B34 for <tcpm@ietfa.amsl.com>; Wed, 27 Nov 2019 19:53:03 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.219
X-Spam-Level:
X-Spam-Status: No, score=-1.219 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, 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 kCpZesMZObw0 for <tcpm@ietfa.amsl.com>; Wed, 27 Nov 2019 19:53:00 -0800 (PST)
Received: from server217-3.web-hosting.com (server217-3.web-hosting.com [198.54.115.226]) (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 AB8731200D5 for <tcpm@ietf.org>; Wed, 27 Nov 2019 19:53:00 -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=TiDjy7pmlXT+/9hBKe9d47KIPFI8vS3IGP6vTbZKUjQ=; b=qZtt2MmJQF2rpIlYiO53C15bU bRNc6IU9Bs2cTuAaIHEx0k76MWGiCNcuEvogrpQWtJeAHwkWUKRF62O+8S5eU7xzV09rbheoJQ5uP iY+NQY3fa64t4SLkjCnLMPNHxywvltWQ0D7Dtja+IjScCzGZECD+E7qRUK9s9JbPYKpZrLYPiO+nr fsOje1jKIFWVJbk/VvivPy/F2k+zLgPkxQphSLDJ8yvT4DTjeKQPr54KkThXfFzxEHrBQTL4tBCeI wJYZawoYBCa11AopLArrpqR84jSC3m/vDlHZvq8FbGZDOlFWQZDQVwsJesNOrpgPoCyedONF+cLFh s+etbMkKQ==;
Received: from cpe-172-250-225-198.socal.res.rr.com ([172.250.225.198]:54316 helo=[192.168.1.10]) by server217.web-hosting.com with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.92) (envelope-from <touch@strayalpha.com>) id 1iaArO-000sSt-VH; Wed, 27 Nov 2019 22:52:59 -0500
Content-Type: text/plain; charset="utf-8"
Mime-Version: 1.0 (Mac OS X Mail 11.5 \(3445.9.1\))
From: Joe Touch <touch@strayalpha.com>
In-Reply-To: <201911280244.xAS2iX3T010083@gndrsh.dnsmgr.net>
Date: Wed, 27 Nov 2019 19:52:53 -0800
Cc: Mike Kosek <Mike.Kosek@comsys.rwth-aachen.de>, "tcpm@ietf.org" <tcpm@ietf.org>
Content-Transfer-Encoding: quoted-printable
Message-Id: <991312DB-9503-4253-8C87-3CBCA6AB99F1@strayalpha.com>
References: <201911280244.xAS2iX3T010083@gndrsh.dnsmgr.net>
To: "Rodney W. Grimes" <4bone@gndrsh.dnsmgr.net>
X-Mailer: Apple Mail (2.3445.9.1)
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: <https://mailarchive.ietf.org/arch/msg/tcpm/HupL2RmPfhCiOaD4T8QnVJm__FQ>
Subject: Re: [tcpm] RFC793bis draft 14 Reserved Bits
X-BeenThere: tcpm@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: TCP Maintenance and Minor Extensions Working Group <tcpm.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/tcpm>, <mailto:tcpm-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/tcpm/>
List-Post: <mailto:tcpm@ietf.org>
List-Help: <mailto:tcpm-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/tcpm>, <mailto:tcpm-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 28 Nov 2019 03:53:04 -0000


> On Nov 27, 2019, at 6:44 PM, Rodney W. Grimes <4bone@gndrsh.dnsmgr.net> wrote:
> 
>> Hi tcpm,
>> 
>> Sorry for bumping this, maybe it got overlooked during 106.
>> 
>> Catching up on draft-ietf-tcpm-rfc793bis-14, I was wondering why the rsrvd bits are not explicitly stated as a formal MUST requirement: 
>> 
>> "Must be zero in generated segments and must be ignored in received segments, if corresponding future features are unimplemented by the sending or receiving host."
>> 
>> To my understanding, the current phrasing is up to interpretation, i.e., someone might opt to not implement it as stated due to the missing formal MUST - Please prove me wrong if I am missing something.
> 
> I would even like to see it go further and add "they MUST be ignored by the network, and traverse the network unchanged.”

Perhaps further explicitly:

they MUST be ignored by the network and MUST traverse the network unchanged

v2.23.0 | Report a Bug | By Email