Re: [v6ops] Scope of Unique Local IPv6 Unicast Addresses (Fwd: New Version Notification for draft-gont-6man-ipv6-ula-scope-00.txt)

Brian E Carpenter <brian.e.carpenter@gmail.com> Thu, 07 January 2021 22:40 UTC

Return-Path: <brian.e.carpenter@gmail.com>
X-Original-To: v6ops@ietfa.amsl.com
Delivered-To: v6ops@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A49B03A0B60; Thu, 7 Jan 2021 14:40:30 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.361
X-Spam-Level:
X-Spam-Status: No, score=-2.361 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, FREEMAIL_FROM=0.001, NICE_REPLY_A=-0.262, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.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 hcMtVuIdNxpV; Thu, 7 Jan 2021 14:40:29 -0800 (PST)
Received: from mail-pf1-x42a.google.com (mail-pf1-x42a.google.com [IPv6:2607:f8b0:4864:20::42a]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 7D0A33A0B58; Thu, 7 Jan 2021 14:40:29 -0800 (PST)
Received: by mail-pf1-x42a.google.com with SMTP id c79so4968114pfc.2; Thu, 07 Jan 2021 14:40:29 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=isJhehR/Lx5KryYWUyXiXdsKsDPxDqgzvGIQPqTi3a0=; b=TCnLCuj6XypXny9QhAp4KG7uxXxq2LKUHWkpBXUuJrBFpz623SeTF+7tuYqmhCIdYl cXRB+965PomLn4F+guY10jMpBK566tXDjE9QGHL8y580WWelfv7aWwaOwAghGiPI3fKl Rfm6fmDqQPoR31hBbbEX8sjjBn6moDIwyiWyGTUNErlH2obtfBjGCLZrYydo4lidS5c6 wWmtmMqMYDx0YLKon5MyLS0mxJ9+YEJ+qY4EAbVyf6i+bqHvMznRVL/mCk/zFWm67rHA ZgctE5sfUlZRH+PL369t1/vyW+fcB9rOxVIrvutHJrSKC5hQPsizNcd0DXV35WopGaJT dRZw==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=isJhehR/Lx5KryYWUyXiXdsKsDPxDqgzvGIQPqTi3a0=; b=mtGvG49fV6uyW2poL7+2Rlgd01sXBHEtfmDnyZa5wgRZ5Jn9L1lfQR6nIe5LkvxDmI SuHxH+2jSNm4iJjcIFIpFEFK34M/7p6078eaTQzntOUazh3MIDnJ0GqVsDwR0DN28RO4 M4CHpJUfYtfQgx/MmjiMPSaE+yQy36AB9nbHGblrBVPjczVq6T3pdBL8vuUBxlHspCD/ orZVDL7puyO4/+fjkdzvTftN6cBUdEi5gTaE99+G7lJSfO19AFPaBTgjet8LDRGG+By3 pdx5Rv61X75az3Or0DWrsTdeUy8Igzo2Dsg/Rsqol1JKUhy8JJwKWu1ppPuRNwPV47ua 9MLA==
X-Gm-Message-State: AOAM530OOgietRIo00/0qxTEoZm2XPEf8085zyasftLW5im87g++/WiZ YaOOayrquTVkfl11vgDJVefnQaOCBKu7Gg==
X-Google-Smtp-Source: ABdhPJyNV+n1dSlQDEBGCociFAQcqvS9f7dBhDRiI7burF6fKVV8kHGrORBX5d5Nkq8ODyfnsdEqJw==
X-Received: by 2002:a63:5023:: with SMTP id e35mr4007909pgb.56.1610059228561; Thu, 07 Jan 2021 14:40:28 -0800 (PST)
Received: from [192.168.178.20] ([151.210.131.28]) by smtp.gmail.com with ESMTPSA id q35sm2924495pjh.38.2021.01.07.14.40.26 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Thu, 07 Jan 2021 14:40:27 -0800 (PST)
To: Philip Homburg <pch-ipv6-ietf-7@u-1.phicoh.com>, ipv6@ietf.org
Cc: IPv6 Operations <v6ops@ietf.org>
References: <160989494094.6024.7402128068704112703@ietfa.amsl.com> <6fe3a45e-de65-9f88-808d-ea7e2abdcd16@si6networks.com> <CAO42Z2wR-3vbHi-NrBBMmCTNDq5fgqvSmBUbYK7P+63QTNfxkg@mail.gmail.com> <CAKD1Yr014PzVJj9Y6O=PBGc_QSVtur-0wMpaNkFA0dqr8FHGuA@mail.gmail.com> <44e7ac61-523a-d35e-9024-7e6df81e4226@gmail.com> <be92f523-eeaa-8ed4-afdf-4a537f53748c@si6networks.com> <CAN-Dau2S9pXYAwrRbfT9aMyXPw-NYaOxKF+nXRg_14zqTr8F0g@mail.gmail.com> <m1kxTpt-0000CxC@stereo.hq.phicoh.net> <2faf76fd-1393-5bc5-52bf-9ee4ba3167a8@gmail.com> <CAO42Z2xBhipQJxX7aauHO7-Y+d0bUhdAxM2OcBxWWi1pGPJ=Vg@mail.gmail.com> <m1kxd1U-0000EhC@stereo.hq.phicoh.net>
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Message-ID: <9677fd8c-a61c-3292-a21a-2f7a31072a74@gmail.com>
Date: Fri, 8 Jan 2021 11:40:23 +1300
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.9.1
MIME-Version: 1.0
In-Reply-To: <m1kxd1U-0000EhC@stereo.hq.phicoh.net>
Content-Type: text/plain; charset=utf-8
Content-Language: en-US
Content-Transfer-Encoding: 7bit
Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/5iGHtvgUIfxK19Ql2AZMxieg2m4>
Subject: Re: [v6ops] Scope of Unique Local IPv6 Unicast Addresses (Fwd: New Version Notification for draft-gont-6man-ipv6-ula-scope-00.txt)
X-BeenThere: v6ops@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: v6ops discussion list <v6ops.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/v6ops>, <mailto:v6ops-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/v6ops/>
List-Post: <mailto:v6ops@ietf.org>
List-Help: <mailto:v6ops-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/v6ops>, <mailto:v6ops-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 07 Jan 2021 22:40:31 -0000

On 08-Jan-21 10:40, Philip Homburg wrote:
>> While I do agree that interface ID is much more closer to the truth, it
>> seems that one reason for zone rather than interface ID for link-locals in
>> RFC 4007 was to inform a multi-interface node that it had multiple
>> interfaces attached to the same link, informing it that the corresponding
>> interface link-local addresses are attached to the same link.
> 
> Are there any implementation that do this? And in particular how does
> that work with the socket interface? I.e., with if_nametoindex and
> if_indextoname.

The machine on which I am typing has interface 6 and interface 22
both up and running.
On interface 6,  the default router is fe80::2e3a:fdff:fea4:dde7%6
On interface 22, the default router is fe80::2e3a:fdff:fea4:dde7%22

Yes, they are the same thing because the default router is also a transparent
Ethernet-to-WiFi bridge. Interface 6 and interface 22 both connect to
the same LAN, but the IP stack has no way to know it.

The zone index as described in RFC4007 is a hallucination.

    Brian