[Gen-art] Gen-ART review of draft-ietf-tcpm-tcp-soft-errors-08.txt
Black_David@emc.com Thu, 21 August 2008 21:38 UTC
Return-Path: <gen-art-bounces@ietf.org>
X-Original-To: gen-art-archive@optimus.ietf.org
Delivered-To: ietfarch-gen-art-archive@core3.amsl.com
Received: from [127.0.0.1] (localhost [127.0.0.1]) by core3.amsl.com (Postfix) with ESMTP id 141953A6A70; Thu, 21 Aug 2008 14:38:08 -0700 (PDT)
X-Original-To: gen-art@core3.amsl.com
Delivered-To: gen-art@core3.amsl.com
Received: from localhost (localhost [127.0.0.1]) by core3.amsl.com (Postfix) with ESMTP id 845053A6B7A; Thu, 21 Aug 2008 14:31:24 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -6.513
X-Spam-Level:
X-Spam-Status: No, score=-6.513 tagged_above=-999 required=5 tests=[AWL=0.086, BAYES_00=-2.599, RCVD_IN_DNSWL_MED=-4]
Received: from mail.ietf.org ([64.170.98.32]) by localhost (core3.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 7ta6S63dnr4O; Thu, 21 Aug 2008 14:31:23 -0700 (PDT)
Received: from mexforward.lss.emc.com (mexforward.lss.emc.com [128.222.32.20]) by core3.amsl.com (Postfix) with ESMTP id EE9903A6B87; Thu, 21 Aug 2008 14:31:22 -0700 (PDT)
Received: from mailhub.lss.emc.com (uraeus.lss.emc.com [10.254.144.14]) by mexforward.lss.emc.com (Switch-3.2.5/Switch-3.1.7) with ESMTP id m7LLUVrX001219 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Thu, 21 Aug 2008 17:30:32 -0400 (EDT)
Received: from corpussmtp3.corp.emc.com (corpussmtp3.corp.emc.com [10.254.64.53]) by mailhub.lss.emc.com (Switch-3.2.5/Switch-3.1.7) with ESMTP id m7LLU4jN017954; Thu, 21 Aug 2008 17:30:27 -0400 (EDT)
From: Black_David@emc.com
Received: from CORPUSMX80A.corp.emc.com ([10.254.89.202]) by corpussmtp3.corp.emc.com with Microsoft SMTPSVC(6.0.3790.1830); Thu, 21 Aug 2008 17:30:23 -0400
X-MimeOLE: Produced By Microsoft Exchange V6.5
Content-class: urn:content-classes:message
MIME-Version: 1.0
Date: Thu, 21 Aug 2008 17:30:23 -0400
Message-ID: <9FA859626025B64FBC2AF149D97C944A3C6EEA@CORPUSMX80A.corp.emc.com>
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
Thread-Topic: Gen-ART review of draft-ietf-tcpm-tcp-soft-errors-08.txt
Thread-Index: AckD1R69SCyykmf9Tza/VunwqLzZ2w==
To: fernando@gont.com.ar, gen-art@ietf.org
X-OriginalArrivalTime: 21 Aug 2008 21:30:23.0952 (UTC) FILETIME=[1EFC0500:01C903D5]
Cc: magnus.westerlund@ericsson.com, tcpm@ietf.org, david.borman@windriver.com, ietf@ietf.org, lars.eggert@nokia.com, weddy@grc.nasa.gov, Black_David@emc.com
Subject: [Gen-art] Gen-ART review of draft-ietf-tcpm-tcp-soft-errors-08.txt
X-BeenThere: gen-art@ietf.org
X-Mailman-Version: 2.1.9
Precedence: list
List-Id: "GEN-ART: General Area Review Team" <gen-art.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/listinfo/gen-art>, <mailto:gen-art-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/pipermail/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>
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Sender: gen-art-bounces@ietf.org
Errors-To: gen-art-bounces@ietf.org
I have been selected as the General Area Review Team (Gen-ART) reviewer for this draft (for background on Gen-ART, please see http://www.alvestrand.no/ietf/gen/art/gen-art-FAQ.html). Please resolve these comments along with any other Last Call comments you may receive. Document: draft-ietf-tcpm-tcp-soft-errors-08.txt Reviewer: David L. Black Review Date: 21 August 2008 IETF LC End Date: 26 August 2008 Summary: This draft is on the right track, but has open issues, described in the review. Comments: This is a good draft reporting on problems encountered in practice with TCP's handling of ICMP errors and what has been done about them. This draft has received extensive discussion in the Transport Area, and I believe it is wise to defer to the Transport Area decision that this draft will not make any changes to the TCP standard. While the draft is in generally good shape, I did find three open issues: (1) The I-D Tracker says that the v6ops-v6onbydefault draft is Dead. Relevant portions of that draft should be reproduced or otherwise explained in Section 3.2. As part of doing this, please state whether trying v6 and v4 connections in parallel is a good idea or not and why. (2) Section 4.1 describes a mechanism from RFC 3168 that retransmits a modified SYN when an RST is received in response to an ECN-setup SYN, and suggests that this mechanism is applicable to ICMP errors received in response to an ECN-setup SYN. This mechanism was specified in RFC 3168 because there were known deployed middleboxes with this problem-causing RST behavior, and the mechanism was necessary to deal with them. Are there any known middleboxes that send an ICMP error in response to a SYN that signals ECN capability? - If yes, state the specific ICMP error(s) that is(are) used and limit the recommendation to the actual error(s). - If no, remove this entire RFC 3168 discussion as speculative, or describe it as a possible response should this problem scenario ever arise in practice. (3) Section 5.3 describes a NAT behavior that causes a host TCP problem and then suggests changing the NAT to fix it. While that's a good idea in an ideal world (and needs to be stated in the draft), in practice, deployed NATs have to be dealt with as-is. In addition to recommending fixing the NAT, please discuss what could be done when the NAT cannot be fixed. Nits: Section 1 - reduce generality of this text. OLD: This document analyzes the fault recovery strategy of TCP [RFC0793], and the problems that may arise due to TCP's reaction to ICMP soft errors. NEW: This document analyzes problems that may arise due to TCP [RFC0793] fault recovery reactions to ICMP soft errors. It would be good to provide the text expansion of the codes in Figure 1, as was done in the text before the figure. In section 4, please provide the expansion of TCPM WG (TCP Maintenance Working Group). idnits 2.08.10 ran clean. Thanks, --David ---------------------------------------------------- David L. Black, Distinguished Engineer EMC Corporation, 176 South St., Hopkinton, MA 01748 +1 (508) 293-7953 FAX: +1 (508) 293-7786 black_david@emc.com Mobile: +1 (978) 394-7754 ---------------------------------------------------- _______________________________________________ Gen-art mailing list Gen-art@ietf.org https://www.ietf.org/mailman/listinfo/gen-art
- [Gen-art] Gen-ART review of draft-ietf-tcpm-tcp-s… Suresh Krishnan
- [Gen-art] Gen-ART review of draft-ietf-tcpm-tcp-s… Black_David
- Re: [Gen-art] Gen-ART review of draft-ietf-tcpm-t… Lars Eggert
- Re: [Gen-art] Gen-ART review of draft-ietf-tcpm-t… Fernando Gont
- Re: [Gen-art] Gen-ART review of draft-ietf-tcpm-t… Black_David
- Re: [Gen-art] Gen-ART review of draft-ietf-tcpm-t… Fernando Gont
- Re: [Gen-art] Gen-ART review of draft-ietf-tcpm-t… Lars Eggert
- Re: [Gen-art] Gen-ART review of draft-ietf-tcpm-t… Fernando Gont