IETF Logo Mail Archive

Re: [dhcwg] [homenet] What to do when we lose DHCPv4 election?

Juliusz Chroboczek <jch@pps.univ-paris-diderot.fr> Mon, 17 August 2015 18:09 UTC

Return-Path: <jch@pps.univ-paris-diderot.fr>
X-Original-To: dhcwg@ietfa.amsl.com
Delivered-To: dhcwg@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 543FA1ACE44; Mon, 17 Aug 2015 11:09:24 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.55
X-Spam-Level:
X-Spam-Status: No, score=-1.55 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HELO_EQ_FR=0.35] autolearn=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 by6ufgS8HMBG; Mon, 17 Aug 2015 11:09:23 -0700 (PDT)
Received: from korolev.univ-paris7.fr (korolev.univ-paris7.fr [IPv6:2001:660:3301:8000::1:2]) (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 6BFFC1A88F6; Mon, 17 Aug 2015 11:09:23 -0700 (PDT)
Received: from mailhub.math.univ-paris-diderot.fr (mailhub.math.univ-paris-diderot.fr [81.194.30.253]) by korolev.univ-paris7.fr (8.14.4/8.14.4/relay1/56228) with ESMTP id t7HI9Kf8014481; Mon, 17 Aug 2015 20:09:20 +0200
Received: from mailhub.math.univ-paris-diderot.fr (localhost [127.0.0.1]) by mailhub.math.univ-paris-diderot.fr (Postfix) with ESMTP id 0391961FA9; Mon, 17 Aug 2015 20:09:22 +0200 (CEST)
X-Virus-Scanned: amavisd-new at math.univ-paris-diderot.fr
Received: from mailhub.math.univ-paris-diderot.fr ([127.0.0.1]) by mailhub.math.univ-paris-diderot.fr (mailhub.math.univ-paris-diderot.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id 0q_desZ9ejyK; Mon, 17 Aug 2015 20:09:21 +0200 (CEST)
Received: from ijon.pps.univ-paris-diderot.fr (unknown [78.194.40.74]) (Authenticated sender: jch) by mailhub.math.univ-paris-diderot.fr (Postfix) with ESMTPSA id 1372461F9A; Mon, 17 Aug 2015 20:09:20 +0200 (CEST)
Date: Mon, 17 Aug 2015 20:09:21 +0200
Message-ID: <87614dvlbi.wl-jch@pps.univ-paris-diderot.fr>
From: Juliusz Chroboczek <jch@pps.univ-paris-diderot.fr>
To: Michael Richardson <mcr+ietf@sandelman.ca>
In-Reply-To: <17393.1439833544@sandelman.ca>
References: <87pp2oioik.wl-jch@pps.univ-paris-diderot.fr> <26135.1439773503@sandelman.ca> <87k2suw6w2.wl-jch@pps.univ-paris-diderot.fr> <25711.1439826616@sandelman.ca> <87k2stvrfa.wl-jch@pps.univ-paris-diderot.fr> <17393.1439833544@sandelman.ca>
User-Agent: Wanderlust/2.15.9
MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue")
Content-Type: text/plain; charset="US-ASCII"
X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.7 (korolev.univ-paris7.fr [194.254.61.138]); Mon, 17 Aug 2015 20:09:20 +0200 (CEST)
X-Miltered: at korolev with ID 55D22350.001 by Joe's j-chkmail (http : // j-chkmail dot ensmp dot fr)!
X-j-chkmail-Enveloppe: 55D22350.001 from mailhub.math.univ-paris-diderot.fr/mailhub.math.univ-paris-diderot.fr/null/mailhub.math.univ-paris-diderot.fr/<jch@pps.univ-paris-diderot.fr>
X-j-chkmail-Score: MSGID : 55D22350.001 on korolev.univ-paris7.fr : j-chkmail score : . : R=. U=. O=. B=0.000 -> S=0.000
X-j-chkmail-Status: Ham
Archived-At: <http://mailarchive.ietf.org/arch/msg/dhcwg/ueBsPAk4eBcgGEvrWDeEGauQIvo>
Cc: dhcwg <dhcwg@ietf.org>, Homenet <homenet@ietf.org>
Subject: Re: [dhcwg] [homenet] What to do when we lose DHCPv4 election?
X-BeenThere: dhcwg@ietf.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: <dhcwg.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/dhcwg>, <mailto:dhcwg-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/dhcwg/>
List-Post: <mailto:dhcwg@ietf.org>
List-Help: <mailto:dhcwg-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/dhcwg>, <mailto:dhcwg-request@ietf.org?subject=subscribe>
X-List-Received-Date: Mon, 17 Aug 2015 18:09:24 -0000

>> The old prefix is no longer announced over the routing protocol, so the
>> old addresses are unreachable now.  (Or are you suggesting that we

> That's not entirely true.  Nodes on the same link (such as 99% of current
> home setups) don't need the routing protocol to reach things.

It doesn't matter -- the old prefix is no longer applied to the link, so
in order to route to the hosts with the old addresses, I'll need to
install host routes.  And if I install them, I might as well announce them
over the routing protocol -- it's actually less code than filtering them
out.

I guess it could be done, but I'm not sure what consequences it would
have, especially if the old prefix is reused by a different link.

-- Juliusz

v2.23.0 | Report a Bug | By Email