From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner+willy=40w.ods.org@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S271756AbTHRND2 (ORCPT <rfc822;willy@w.ods.org>);
	Mon, 18 Aug 2003 09:03:28 -0400
Received: (majordomo@vger.kernel.org) by vger.kernel.org id S271741AbTHRNDL
	(ORCPT <rfc822;linux-kernel-outgoing>);
	Mon, 18 Aug 2003 09:03:11 -0400
Received: from pizda.ninka.net ([216.101.162.242]:35565 "EHLO pizda.ninka.net")
	by vger.kernel.org with ESMTP id S271744AbTHRNDE (ORCPT
	<rfc822;linux-kernel@vger.kernel.org>);
	Mon, 18 Aug 2003 09:03:04 -0400
Date: Mon, 18 Aug 2003 05:55:55 -0700
From: "David S. Miller" <davem@redhat.com>
To: Stephan von Krawczynski <skraw@ithnet.com>
Cc: willy@w.ods.org, alan@lxorguk.ukuu.org.uk, carlosev@newipnet.com,
       lamont@scriptkiddie.org, davidsen@tmr.com, bloemsaa@xs4all.nl,
       marcelo@conectiva.com.br, netdev@oss.sgi.com, linux-net@vger.kernel.org,
       layes@loran.com, torvalds@osdl.org, linux-kernel@vger.kernel.org
Subject: Re: [2.4 PATCH] bugfix: ARP respond on all devices
Message-Id: <20030818055555.248f2a01.davem@redhat.com>
In-Reply-To: <20030818145316.3a81f70c.skraw@ithnet.com>
References: <20030728213933.F81299@coredump.scriptkiddie.org>
	<200308171509570955.003E4FEC@192.168.128.16>
	<200308171516090038.0043F977@192.168.128.16>
	<1061127715.21885.35.camel@dhcp23.swansea.linux.org.uk>
	<200308171555280781.0067FB36@192.168.128.16>
	<1061134091.21886.40.camel@dhcp23.swansea.linux.org.uk>
	<200308171759540391.00AA8CAB@192.168.128.16>
	<1061137577.21885.50.camel@dhcp23.swansea.linux.org.uk>
	<200308171827130739.00C3905F@192.168.128.16>
	<1061141045.21885.74.camel@dhcp23.swansea.linux.org.uk>
	<20030817224849.GB734@alpha.home.local>
	<20030817223118.3cbc497c.davem@redhat.com>
	<20030818133957.3d3d51d2.skraw@ithnet.com>
	<20030818044419.0bc24d14.davem@redhat.com>
	<20030818143401.1352d158.skraw@ithnet.com>
	<20030818053007.7852ca77.davem@redhat.com>
	<20030818145316.3a81f70c.skraw@ithnet.com>
X-Mailer: Sylpheed version 0.9.2 (GTK+ 1.2.6; sparc-unknown-linux-gnu)
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
X-Mailing-List: linux-kernel@vger.kernel.org

On Mon, 18 Aug 2003 14:53:16 +0200
Stephan von Krawczynski <skraw@ithnet.com> wrote:

> _And_ you did not explain so far why these implementations should
> not be RFC-conform or else illegal.

Both responding and not responding on all interfaces for ARPs
is RFC conformant.  This means both Linux and other systems
are within the rules.

Under Linux, by default, IP addresses are owned by the system
not by interfaces.  This increases the likelyhood of successful
communication on a subnet.

For scenerios where this doesn't work, we have ways to make the
kernel behave the way you want it to.

There is no discussion about changing the default, because that
might break things for some people.  So this discussion is pretty
useless.