From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161081AbXCGHNz (ORCPT ); Wed, 7 Mar 2007 02:13:55 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1161092AbXCGHNz (ORCPT ); Wed, 7 Mar 2007 02:13:55 -0500 Received: from netcore.fi ([193.94.160.1]:35416 "EHLO netcore.fi" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1161081AbXCGHNy (ORCPT ); Wed, 7 Mar 2007 02:13:54 -0500 X-Greylist: delayed 1689 seconds by postgrey-1.27 at vger.kernel.org; Wed, 07 Mar 2007 02:13:53 EST Date: Wed, 7 Mar 2007 08:42:39 +0200 (EET) From: Pekka Savola To: Chris Friesen cc: Stephen Hemminger , David Miller , jeremy@goop.org, ak@muc.de, akpm@linux-foundation.org, linux-kernel@vger.kernel.org, virtualization@lists.osdl.org, xen-devel@lists.xensource.com, chrisw@sous-sol.org, zach@vmware.com, rusty@rustcorp.com.au, ian.pratt@xensource.com, Christian.Limpach@cl.cam.ac.uk, netdev@vger.kernel.org, jeff@garzik.org Subject: Re: [RFC] ARP notify option In-Reply-To: <45EDDA8F.5060106@nortel.com> Message-ID: References: <20070301164214.4a40bc59@freekitty> <45E7764A.7000100@goop.org> <20070301173030.754514ec@freekitty> <20070305.203536.92584097.davem@davemloft.net> <20070306105132.52c77491@freekitty> <45EDDA8F.5060106@nortel.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 6 Mar 2007, Chris Friesen wrote: > Stephen Hemminger wrote: >> +arp_notify - BOOLEAN >> + Define mode for notification of address and device changes. >> + 0 - (default): do nothing >> + 1 - Generate gratuitous arp replies when device is brought up >> + or hardware address changes. > > Did you consider using gratuitous arp requests instead? I remember reading > about some hardware that updated its arp cache on gratuitous requests but not > gratuitous replies. You might be interested in taking a look at: http://tools.ietf.org/id/draft-cheshire-ipv4-acd There has been some follow-up discussion on this in the thread starting at: http://www1.ietf.org/mail-archive/web/int-area/current/msg00611.html In particular, you may be interested in this comment about ARP request and ARP reply for gratuitous ARP: http://www1.ietf.org/mail-archive/web/int-area/current/msg00669.html -- Pekka Savola "You each name yourselves king, yet the Netcore Oy kingdom bleeds." Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings