IETF Logo Mail Archive

RE: Running code (Was: I-D Action: draft-ietf-6man-ipv6only-flag-03.txt)

"Manfredi (US), Albert E" <albert.e.manfredi@boeing.com> Mon, 29 October 2018 02:08 UTC

Return-Path: <albert.e.manfredi@boeing.com>
X-Original-To: ipv6@ietfa.amsl.com
Delivered-To: ipv6@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A8158126CB6 for <ipv6@ietfa.amsl.com>; Sun, 28 Oct 2018 19:08:36 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.601
X-Spam-Level:
X-Spam-Status: No, score=-2.601 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
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 OmgVIsBWaswj for <ipv6@ietfa.amsl.com>; Sun, 28 Oct 2018 19:08:34 -0700 (PDT)
Received: from clt-mbsout-02.mbs.boeing.net (clt-mbsout-02.mbs.boeing.net [130.76.144.163]) (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 4D5A0128CE4 for <ipv6@ietf.org>; Sun, 28 Oct 2018 19:08:34 -0700 (PDT)
Received: from localhost (localhost [127.0.0.1]) by clt-mbsout-02.mbs.boeing.net (8.14.4/8.14.4/DOWNSTREAM_MBSOUT) with SMTP id w9T28Vc1012299; Sun, 28 Oct 2018 22:08:31 -0400
Received: from XCH16-01-07.nos.boeing.com (xch16-01-07.nos.boeing.com [144.115.65.217]) by clt-mbsout-02.mbs.boeing.net (8.14.4/8.14.4/UPSTREAM_MBSOUT) with ESMTP id w9T28Ntc012259 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=OK); Sun, 28 Oct 2018 22:08:23 -0400
Received: from XCH16-01-11.nos.boeing.com (144.115.66.39) by XCH16-01-07.nos.boeing.com (144.115.65.217) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.1.1466.3; Sun, 28 Oct 2018 19:08:22 -0700
Received: from XCH16-01-11.nos.boeing.com ([fe80::a96c:5d85:1337:4323]) by XCH16-01-11.nos.boeing.com ([fe80::a96c:5d85:1337:4323%4]) with mapi id 15.01.1466.003; Sun, 28 Oct 2018 19:08:22 -0700
From: "Manfredi (US), Albert E" <albert.e.manfredi@boeing.com>
To: Mark Smith <markzzzsmith@gmail.com>
CC: 6man WG <ipv6@ietf.org>
Subject: RE: Running code (Was: I-D Action: draft-ietf-6man-ipv6only-flag-03.txt)
Thread-Topic: Running code (Was: I-D Action: draft-ietf-6man-ipv6only-flag-03.txt)
Thread-Index: AQHUbJuG2Zjjso5+/km4+87SaUMNqaUwfHjwgAE2LoCAACLHMIAAg2aA//+OfUCAAKaPAP//pPRQgAFwdoCAACj2sIABCHiAgAA1yNCAANlwgP//jPZQAA/JCoAADlWf4A==
Date: Mon, 29 Oct 2018 02:08:22 +0000
Message-ID: <b9be753dc3134e3c92eac3c9f773c934@boeing.com>
References: <CAFU7BASO_ByzbanhLKnWV280O_fASd-8W+ujpj3sN6d2-whw2w@mail.gmail.com> <66759b73-0a22-e1a9-49db-21154e8e1267@gmail.com> <37ba23b3-df19-9c2a-bdbe-ba7a99d72d05@si6networks.com> <0d6008a4-337b-2ccb-2d9f-837f786eca65@gmail.com> <bfa4397a-aa7a-1184-4147-4cbfbfd13603@si6networks.com> <E8DE18B5-94FC-411C-A310-E49A382E0079@thehobsons.co.uk> <e0fa8fad1b4249c9af79788323b0a922@boeing.com> <3A03A073-72E2-43A8-90A4-5C29DF445361@thehobsons.co.uk> <27fdbd71125842d888c5136684bf6e7b@boeing.com> <9A4368D6-E4B1-474C-9838-B584AF6D70C8@thehobsons.co.uk> <a3a2d823c38f44d48b301e2ca657e352@boeing.com> <6EE067A5-3536-4EDD-80D9-D98783DE57CE@thehobsons.co.uk> <0be69133e9a34199b5796410684ab226@boeing.com> <308494108c0b466f91a9314f7d9367bc@boeing.com> <8E339E1C-6AC9-4012-AA63-1A39D64EEDAB@thehobsons.co.uk> <f805c8e5b3dc40a8b8f245f44b7c1c7a@boeing.com> <e421e5ef-137f-bac1-765f-13e6c9107671@gmail.com> <c305e6f01a5349728489cbd53e818ae0@boeing.com> <CAO42Z2wpKpw4dqHU2UCck91qyr9jWnj-h7mQRRkArVH=asbDVw@mail.gmail.com>
In-Reply-To: <CAO42Z2wpKpw4dqHU2UCck91qyr9jWnj-h7mQRRkArVH=asbDVw@mail.gmail.com>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
x-originating-ip: [137.137.12.6]
x-tm-snts-smtp: 714DB62CF7BED62C27FFACA4D620670D736B67964E203983FEDC92AFC28C89B42000:8
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
MIME-Version: 1.0
X-TM-AS-GCONF: 00
Archived-At: <https://mailarchive.ietf.org/arch/msg/ipv6/4opvtyQn05QtKrroh3PoFVX5IJ8>
X-BeenThere: ipv6@ietf.org
X-Mailman-Version: 2.1.29
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: <https://mailarchive.ietf.org/arch/browse/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, 29 Oct 2018 02:08:37 -0000

-----Original Message-----
From: Mark Smith <markzzzsmith@gmail.com> 

> You're misunderstanding the mechanism. This flag is not a router
capability flag.

Not meant to be, anyway:

   Hosts receiving the Router Advertisement SHOULD only process this
   flag if the advertising router is a Default Router.  Specifically, if
   the Lifetime field in the Router Advertisement is not zero, otherwise
   it SHOUD be ignored.  This is done to allow some IPv6 routers to
   advertise information without being a Default Router and providing
   IPv6 connectivity.

...

   If there are multiple IPv6 default routers on a link, they might send
   different values of the flag.  If at least one IPv6 default router
   sends the flag with value 0, a dual stack host SHOULD NOT assume that
   the link is IPv6-Only.  If all IPv6 default routers send the flag
   with value 1, a dual stack host SHOULD assume that this is an
   IPv6-Only link.

   A host that receives only RAs with the flag set to 1 SHOULD NOT
   attempt any IPv4 operations, unless it subsequently receives at least
   one RA with the flag set to zero.  As soon as such an RA is received,
   IPv4 operations SHOULD be started.

This seems to say that only when all "default routers" have the flag set, would the link truly be IPv6 only. (And even then, bring your own peripherals should not be precluded?) So in effect, all said and done, does this not say only that *this* router won't route IPv4?

Bert

v2.23.0 | Report a Bug | By Email