IETF Logo Mail Archive

Re: I-D Action: draft-linkova-6man-default-addr-selection-update-00.txt

Jen Linkova <furry13@gmail.com> Fri, 07 April 2017 12:54 UTC

Return-Path: <furry13@gmail.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 607D9126557 for <ipv6@ietfa.amsl.com>; Fri, 7 Apr 2017 05:54:42 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.45
X-Spam-Level:
X-Spam-Status: No, score=-2.45 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_LOW=-0.7, 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 3Qycss5FHQgB for <ipv6@ietfa.amsl.com>; Fri, 7 Apr 2017 05:54:39 -0700 (PDT)
Received: from mail-io0-x22d.google.com (mail-io0-x22d.google.com [IPv6:2607:f8b0:4001:c06::22d]) (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 2062E129468 for <ipv6@ietf.org>; Fri, 7 Apr 2017 05:54:32 -0700 (PDT)
Received: by mail-io0-x22d.google.com with SMTP id z13so48885050iof.2 for <ipv6@ietf.org>; Fri, 07 Apr 2017 05:54:32 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=54yeR7zVa6stDseQajkcgOnxFNWqVjDIn4ryj8PZQos=; b=p1kVCeL1gtguboDGQYQ/PmXT2WuD+Ir+64bQu6597mVwkA8JQhHxj5IJmoCjRQdpSH PVtSBJqoKc3eu4PkVYAEZ+eQ5Ytuc9pKn6DpGpVrHCzDyonSulxV5bk7R4nTE+Lk2aZ4 4inBO20GkLnRqA8mXqdhqFv7WWlJ11mZsqFsQvm+dn9fPZIfX7GbZdtE+2CEAieYXLkT jY05h/HsWs+71asgfXXO3P3O/mEe0veXIh6wdR8RzSACFUYRm9LlHMrF7wGcbMDpUB41 aCXi8LTvnmtsHP/f7kxUhtum80E4zajhaakPFAY2p8HaHY7blcVJ2kznA4+6YhekNZp1 o5jQ==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=54yeR7zVa6stDseQajkcgOnxFNWqVjDIn4ryj8PZQos=; b=OJYUnZD7yZPAO9iPMbUfALM9S+YYSfMgSXGmkmaH7AJ9/1ASsgGlTzXPwLi6ukqFrn /zg1l48zcLA3MutGYsltgRDyFEnY77QsLSCz071/2ISE1QOv20W93Sgvnb4moO18qY4l nvZMZEcPLeCh4X5VNdvWYT2/NOfzsI53ZRPXQsdENashqoZNQItTUvlOgDRZbcOqJY7x fhcQ9nRJggLz5CMADL1A4J7tFRtF/bvn3jKvtj2VP+g0ODg0h8jVeM7yoJLEUb7Pbv5I 0laLewTqZDChTEKYgrxzouGY8edQQgU7xLhYzZbAGFlFdbZ6SXBBDbkcjqTYHn3fLP3P zsew==
X-Gm-Message-State: AFeK/H0fHY+NuMDtisQFNs+MhLSU2pkZL1qPVBAQInsKQ4PR/ryQvTz7y40SrOPrv1Y0yf4OQl4YpuOAxkjM7A==
X-Received: by 10.107.136.96 with SMTP id k93mr37596999iod.20.1491569671485; Fri, 07 Apr 2017 05:54:31 -0700 (PDT)
MIME-Version: 1.0
Received: by 10.107.184.197 with HTTP; Fri, 7 Apr 2017 05:54:10 -0700 (PDT)
In-Reply-To: <1f8d497b-3286-2074-7c2e-f224ceda55a8@gmail.com>
References: <149093611351.8864.5121956820429281359@ietfa.amsl.com> <1f8d497b-3286-2074-7c2e-f224ceda55a8@gmail.com>
From: Jen Linkova <furry13@gmail.com>
Date: Fri, 07 Apr 2017 14:54:10 +0200
Message-ID: <CAFU7BASwiTaPcJeDqqZSC-d1=3fVaNT3awZzYj9beZjHLYb9XA@mail.gmail.com>
Subject: Re: I-D Action: draft-linkova-6man-default-addr-selection-update-00.txt
To: Brian E Carpenter <brian.e.carpenter@gmail.com>
Cc: 6man <ipv6@ietf.org>
Content-Type: text/plain; charset="UTF-8"
Archived-At: <https://mailarchive.ietf.org/arch/msg/ipv6/OR3fgYWiCwB_dOu84RD1BSylZmY>
X-BeenThere: ipv6@ietf.org
X-Mailman-Version: 2.1.22
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: Fri, 07 Apr 2017 12:54:42 -0000

On Wed, Apr 5, 2017 at 12:18 AM, Brian E Carpenter
<brian.e.carpenter@gmail.com> wrote:
> As far as I can see this proposal makes sense and should work.

Thanks a lot for reviewing!

>But:
>
>>    1.  The link-local address of the router in the new layer 2 domain
>>        might be the same as the link-local address of the "old" router
>>        (it's quite common to have link-local address on routers to be
>>        explicitly configured, especially in VRRP-enabled environments)
>
> Wow. Shouldn't there also be an operational recommendation to configure
> non-clashing or at least highly-unlikely-to-clash addresses for
> such routers?

Well, maybe we should write smth about it. However link-local
addresses are meaningful and should be unique *on link*.
I can not see how/why we shall require them to be unique among all
interfaces on two (or more) routers.
I do see people configure fe80::1 as a vrrp link-local-address and I'm
afraid that even we try to convince the whole world that
it's not a good idea, we might not achieve 100% success ;)

-- 
SY, Jen Linkova aka Furry

v2.23.0 | Report a Bug | By Email