comments on draft-ietf-6man-enhanced-dad-04
Jouni Korhonen <jouni.nospam@gmail.com> Mon, 10 February 2014 16:05 UTC
Return-Path: <jouni.nospam@gmail.com>
X-Original-To: ipv6@ietfa.amsl.com
Delivered-To: ipv6@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 0F4481A086D for <ipv6@ietfa.amsl.com>; Mon, 10 Feb 2014 08:05:26 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2
X-Spam-Level:
X-Spam-Status: No, score=-2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, SPF_PASS=-0.001] autolearn=ham
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 V4f4Q9w0hxW9 for <ipv6@ietfa.amsl.com>; Mon, 10 Feb 2014 08:05:24 -0800 (PST)
Received: from mail-lb0-x22a.google.com (mail-lb0-x22a.google.com [IPv6:2a00:1450:4010:c04::22a]) by ietfa.amsl.com (Postfix) with ESMTP id C91121A0320 for <ipv6@ietf.org>; Mon, 10 Feb 2014 08:05:23 -0800 (PST)
Received: by mail-lb0-f170.google.com with SMTP id u14so5002509lbd.1 for <ipv6@ietf.org>; Mon, 10 Feb 2014 08:05:22 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:content-type:content-transfer-encoding:subject:message-id:date :to:mime-version; bh=ImzJfAg3vx1LvrvNWUo3lHllsNNxWreC3Acj4tigYUY=; b=yQGGeTb6SuQarRQAkJpuSlTridgBzvcr+4KkbPOxQkUJQGUHp4/lxxY7tuocZavzaS gg+5M4mnNmOBvNedxaUHyn4ZCYti5myD1g6vzwku3AEQIWBIl8HPKCKnaQ3z//A1wVjP HqBBgLngp4Y5G6rLtBOQQydK079zL0Mm/KpXUPJphwK/sCaTPr6QiCfDus9Vc4ZnUdOu mzbGprIAfFmflmeERnws1848xgtuSNyrCflTkUfzEjJteEbEkXe6KG+jAaa6a2HHuq+9 PBOo3vf31oY5BJeqtPohMpewBqmH1a68n3nlsQ4/MGddKeWIKsH9eOyFAO6RxMwhZpTO eD1Q==
X-Received: by 10.152.205.11 with SMTP id lc11mr22695667lac.29.1392048322846; Mon, 10 Feb 2014 08:05:22 -0800 (PST)
Received: from [188.117.15.108] ([188.117.15.108]) by mx.google.com with ESMTPSA id 10sm22915354lan.5.2014.02.10.08.05.21 for <multiple recipients> (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 10 Feb 2014 08:05:22 -0800 (PST)
From: Jouni Korhonen <jouni.nospam@gmail.com>
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
Subject: comments on draft-ietf-6man-enhanced-dad-04
Message-Id: <78AE6729-1A26-48EA-BD31-FBBDE85C829E@gmail.com>
Date: Mon, 10 Feb 2014 18:05:21 +0200
To: draft-ietf-6man-enhanced-dad@tools.ietf.org, IPv6 IPv6 List <ipv6@ietf.org>
Mime-Version: 1.0 (Mac OS X Mail 6.6 \(1510\))
X-Mailer: Apple Mail (2.1510)
X-BeenThere: ipv6@ietf.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: "IPv6 Maintenance Working Group \(6man\)" <ipv6.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/ipv6>, <mailto:ipv6-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/ipv6/>
List-Post: <mailto:ipv6@ietf.org>
List-Help: <mailto:ipv6-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/ipv6>, <mailto:ipv6-request@ietf.org?subject=subscribe>
X-List-Received-Date: Mon, 10 Feb 2014 16:05:26 -0000
Authors, I have a read on this document. I find it good and informative. Few comments and questions inline. ** Abstract o There is no mention that this document updates RFC4861 and RFC4862. ** Section 1 specified in [RFC4862]. Failure also includes if the Target Address is optimistic. Optimistic DAD is specified in [RFC4429]. o I do not understand the sentence "Failure also includes if the Target Address is optimistic." Some word missing there? ** Section 3.2 This solution requires no protocol changes. This solution SHOULD be enabled by default, and MUST be a configurable option. o I would clarify here, just to be clear on the context, that the above MUST applies only if the layer 2 has an ability to detect looped back messages. Proposed text: This solution requires no protocol changes. This solution SHOULD be enabled by default, and MUST be a configurable option if the layer 2 technology provides means for detecting loopback messages on an interface circuit. ** Section 4 SEND. See more details in the Impact on SEND section. Since a nonce ^^^^^^^^^^^^^^^^^^^^^^^ o I would point explicitly to the section number as well. o The algorithm description in the second paragraph is somewhat hard to follow. I had to read it quite many times.. On the other hand, the algorithm description in Section 4.2 is far more readable. Consider having the algorithm description only in one place. ** Section 4.2 The MAX_MULTICAST_SOLICIT number of NS(DAD) messages sequence continues until the stop condition is reached. o Or manual administrative actions are taken, right? o The stop condition and ending the probing means the interface moves the Target Address to assigned state, right? I would say that explicitly. ** Section 4.4 detecting looped back ND messages. If this document updates [RFC4862], SEND should be updated to integrate with the Enhanced DAD algorithm. A minor update to SEND would be to explicitly mention o "If this document updates.." well it does. Propose changing the text to something like "Since this document.." o Why there is no proposal for those "minor" SEND updates? ** Section 4.5 The following text is added to [RFC4862]. o Added where in RFC4862? Propose an explicit place. o The added text should probably have a reference to this document. ** Section 4.6 o Changes where exactly in RFC4861? Propose an explicit place. o The added text should probably have a reference to this document. ** Section 6 algorithm. SEND is recommended for this exploit. For any mitigation o I would say SEND is not recommend for this exploit rather SEND is recommended to circumvent this exploit. ** Section 9 o Obsolete normative reference to RFC1247 (obsoleted by RFC1583) o No reference to RFC2119 (also there is no typical RFC2119 boilerplate text) o draft-ietf-6man-impatient-nud -> RFC7048 - Jouni
- comments on draft-ietf-6man-enhanced-dad-04 Jouni Korhonen
- RE: comments on draft-ietf-6man-enhanced-dad-04 Hemant Singh (shemant)
- Re: comments on draft-ietf-6man-enhanced-dad-04 Jouni Korhonen