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

Joe Touch <touch@isi.edu> Tue, 17 May 2016 15:55 UTC

Return-Path: <touch@isi.edu>
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 3F38B12DA33 for <homenet@ietfa.amsl.com>; Tue, 17 May 2016 08:55:15 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -8.326
X-Spam-Level:
X-Spam-Status: No, score=-8.326 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, RP_MATCHES_RCVD=-1.426] 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 OkL4TVhN7O5A for <homenet@ietfa.amsl.com>; Tue, 17 May 2016 08:55:13 -0700 (PDT)
Received: from vapor.isi.edu (vapor.isi.edu [128.9.64.64]) (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 BBA2E12DA32 for <homenet@ietf.org>; Tue, 17 May 2016 08:55:13 -0700 (PDT)
Received: from [192.168.1.130] (cpe-172-250-251-17.socal.res.rr.com [172.250.251.17]) (authenticated bits=0) by vapor.isi.edu (8.13.8/8.13.8) with ESMTP id u4HFsW4R019621 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT); Tue, 17 May 2016 08:54:43 -0700 (PDT)
References: <87wpms8zvo.wl-jch@pps.univ-paris-diderot.fr>
In-Reply-To: <87wpms8zvo.wl-jch@pps.univ-paris-diderot.fr>
Mime-Version: 1.0 (1.0)
Content-Transfer-Encoding: quoted-printable
Content-Type: text/plain; charset=us-ascii
Message-Id: <1EB127FA-8E52-4288-AEA2-E76006CAC4E7@isi.edu>
X-Mailer: iPad Mail (13E238)
From: Joe Touch <touch@isi.edu>
Date: Tue, 17 May 2016 08:54:31 -0700
To: Juliusz Chroboczek <jch@pps.univ-paris-diderot.fr>
X-ISI-4-43-8-MailScanner: Found to be clean
X-MailScanner-From: touch@isi.edu
Archived-At: <http://mailarchive.ietf.org/arch/msg/homenet/aBxKw8ZYictdX96JAgEeujR5t44>
Cc: homenet@ietf.org
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: Tue, 17 May 2016 15:55:15 -0000


> On May 17, 2016, at 8:31 AM, Juliusz Chroboczek <jch@pps.univ-paris-diderot.fr> wrote:
> 
> Hi,
> 
> I just received a bug report for shncpd from somebody who noted that
> shncpd's DHCPv4 server will happily assign addresses a.b.c.0 and a.b.c.255
> to clients.  That's obviously broken.

Not since 1993 and RFC 1519, depending on the subnet mask.

See also RFC 3021.

> Which addresses must be avoided, for both v4 and v6?

All 0's and all 1's within a subnet range except for /31 in IPv4.

I don't think there are prohibited or reserved interface or group IDs in IPv6. 

Specific addresses and ranges for both, but I think that's a different issue.

Joe

>  I'm already setting
> the g and u bits in modified EUI-64 to 0 (silly as it is), what else
> should I take care of?
> 
> -- Juliusz
> 
> _______________________________________________
> homenet mailing list
> homenet@ietf.org
> https://www.ietf.org/mailman/listinfo/homenet