IETF Logo Mail Archive

Re: ICMP6 redirect

Philipp Kern <phil@philkern.de> Wed, 25 July 2012 09:19 UTC

Return-Path: <pkern@spike.0x539.de>
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 AB2EB21F857A for <ipv6@ietfa.amsl.com>; Wed, 25 Jul 2012 02:19:13 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.6
X-Spam-Level:
X-Spam-Status: No, score=-2.6 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, NO_RELAYS=-0.001]
Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 8w-VELilyU1V for <ipv6@ietfa.amsl.com>; Wed, 25 Jul 2012 02:19:12 -0700 (PDT)
Received: from hub.kern.lc (hub.kern.lc [IPv6:2a00:1158:3::c7]) by ietfa.amsl.com (Postfix) with ESMTP id EBD5221F8575 for <ipv6@ietf.org>; Wed, 25 Jul 2012 02:19:11 -0700 (PDT)
Received: from [2001:470:720c:0:7c26:800f:8492:6266] (helo=spike.0x539.de) by hub.kern.lc with esmtpsa (TLS1.2:DHE_RSA_AES_128_CBC_SHA1:128) (Exim 4.80) (envelope-from <pkern@spike.0x539.de>) id 1StxkE-0002Xp-4t for ipv6@ietf.org; Wed, 25 Jul 2012 11:19:02 +0200
Received: from pkern by spike.0x539.de with local (Exim 4.80) (envelope-from <pkern@spike.0x539.de>) id 1StxkK-0004Hc-Bh for ipv6@ietf.org; Wed, 25 Jul 2012 11:19:08 +0200
Date: Wed, 25 Jul 2012 11:19:08 +0200
From: Philipp Kern <phil@philkern.de>
To: ipv6@ietf.org
Subject: Re: ICMP6 redirect
Message-ID: <20120725091908.GB14875@spike.0x539.de>
References: <CC3464CC.26C27%hesham@elevatemobile.com> <1DC7DA96-0DF2-4C79-BDEF-0DD038257B41@gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Disposition: inline
In-Reply-To: <1DC7DA96-0DF2-4C79-BDEF-0DD038257B41@gmail.com>
User-Agent: Mutt/1.5.21 (2010-09-15)
X-BeenThere: ipv6@ietf.org
X-Mailman-Version: 2.1.12
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: <http://www.ietf.org/mail-archive/web/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: Wed, 25 Jul 2012 09:19:13 -0000

Andrew,

am Wed, Jul 25, 2012 at 07:11:53PM +1200 hast du folgendes geschrieben:
> However, if it is not a misconfiguration, and you wish to redirect traffic
> that has a better first hop, or is on-link but the host for whatever reason
> does not know that, is that possible?  Should it be?

I still wonder how the devices should figure out that there's a better first
hop apart from network misdesigns[1].

Are people really diverging from "one subnet per VLAN" with two routers
connected to a segment and routing the traffic to the other router over that
segment? (But that's possibly an ops question.)

Kind regards
Philipp Kern

[1] http://www.cymru.com/gillsr/documents/icmp-redirects-are-bad.pdf

v2.23.0 | Report a Bug | By Email