Re: [homenet] Which IP addresses must be avoided?

otroan@employees.org Wed, 18 May 2016 08:03 UTC

Return-Path: <otroan@employees.org>
X-Original-To: homenet@ietfa.amsl.com
Delivered-To: homenet@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 50D7A12D176 for <homenet@ietfa.amsl.com>; Wed, 18 May 2016 01:03:06 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.336
X-Spam-Level:
X-Spam-Status: No, score=-1.336 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, SPF_HELO_PASS=-0.001, SPF_SOFTFAIL=0.665] autolearn=no autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=employees.org; domainkeys=pass (1024-bit key) header.from=otroan@employees.org header.d=employees.org
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 eLz7Kpr5x8Cx for <homenet@ietfa.amsl.com>; Wed, 18 May 2016 01:03:05 -0700 (PDT)
Received: from incoming.kjsl.com (inbound02.kjsl.com [IPv6:2001:1868:2002::144]) (using TLSv1.2 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 5E75D12D14C for <homenet@ietf.org>; Wed, 18 May 2016 01:03:04 -0700 (PDT)
Received: from cowbell.employees.org ([IPv6:2001:1868:a000:17::142]) by ironport02.kjsl.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 18 May 2016 08:03:02 +0000
Received: from cowbell.employees.org (localhost [127.0.0.1]) by cowbell.employees.org (Postfix) with ESMTP id 08DC89CC7D; Wed, 18 May 2016 01:03:02 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=employees.org; h=subject :mime-version:content-type:from:in-reply-to:date:cc:message-id :references:to; s=selector1; bh=0LcY6UKu6x7MNLt94mZYhE35ehw=; b= dlbEDYHmurtvkuTQNy8jBG/EpyHABdwY2BBEVjjObwIJRcb8I4RY0iuKZ8XDQa/c GHlPmyHR2E/V7EwvenafW+qi34brx1M4LUjcAOv5/uhDaAeFFtSRn/ToXBqrODyT XuFwJZb7KKlq0NLCp4wzUCjZR+QQlztCa1rp7BpaXc0=
DomainKey-Signature: a=rsa-sha1; c=nofws; d=employees.org; h=subject :mime-version:content-type:from:in-reply-to:date:cc:message-id :references:to; q=dns; s=selector1; b=QdMFmK7hfnABMlBIagyJH1Ajl/ 1GGZEQeWngxtJgpkpo8KJq+QdkP2WNAztZaSdRjVXFduh1gMv3pis8du+17xY9B3 ncBDeJyEIiOmBEheeDhMwwqEfgu1lTribhfC8iynl20/rJwDw1GuLO9lSOXmOF2Z r5wqKDFums7GPRyfE=
Received: from h.hanazo.no (unknown [173.38.220.39]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: otroan) by cowbell.employees.org (Postfix) with ESMTPSA id B5D759CC4E; Wed, 18 May 2016 01:03:01 -0700 (PDT)
Received: from [IPv6:::1] (localhost [IPv6:::1]) by h.hanazo.no (Postfix) with ESMTP id 7E3801692B30; Wed, 18 May 2016 10:03:01 +0200 (CEST)
Mime-Version: 1.0 (Mac OS X Mail 9.3 \(3124\))
Content-Type: multipart/signed; boundary="Apple-Mail=_1C5F7991-7D86-424F-8E2E-EB27C76128EE"; protocol="application/pgp-signature"; micalg=pgp-sha512
X-Pgp-Agent: GPGMail 2.6b2
From: otroan@employees.org
In-Reply-To: <87eg908mrs.wl-jch@pps.univ-paris-diderot.fr>
Date: Wed, 18 May 2016 10:02:58 +0200
Message-Id: <DC2842AD-58E0-4E21-AB45-0994C348C201@employees.org>
References: <87wpms8zvo.wl-jch@pps.univ-paris-diderot.fr> <573B4076.304@kit.edu> <87eg908mrs.wl-jch@pps.univ-paris-diderot.fr>
To: Juliusz Chroboczek <jch@pps.univ-paris-diderot.fr>
X-Mailer: Apple Mail (2.3124)
Archived-At: <http://mailarchive.ietf.org/arch/msg/homenet/fyH93gy9BLYJ-ltk8q9roveiDUw>
Cc: Markus Stenberg <homenet@ietf.org>, "Bless, Roland \(TM\)" <roland.bless@kit.edu>
Subject: Re: [homenet] Which IP addresses must be avoided?
X-BeenThere: homenet@ietf.org
X-Mailman-Version: 2.1.17
Precedence: list
List-Id: IETF Homenet WG mailing list <homenet.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/homenet>, <mailto:homenet-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/homenet/>
List-Post: <mailto:homenet@ietf.org>
List-Help: <mailto:homenet-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/homenet>, <mailto:homenet-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 18 May 2016 08:03:06 -0000

Juliusz,

>> https://tools.ietf.org/html/rfc5453
>> provides an answer w.r.t. IPv6.
> 
> Do I need to avoid these addresses when assigning a /128 or a /127?

no. if you assign a /128, that is a single address, the length of the IID is zero.
the case of /127 is a little trickier, since then one end will get the subnet-router anycast address.
as long as both ends of the /127 agree, that's not a problem.

Best regards,
Ole