From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: [net-next PATCH v3] ipv4: allow warming up the ARP cache with request type gratuitous ARP Date: Tue, 19 Jan 2010 02:11:38 -0800 (PST) Message-ID: <20100119.021138.172154379.davem@davemloft.net> References: <201001190058.44495.opurdila@ixiacom.com> <20100119100913.65177497@opy.nosense.org> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: opurdila@ixiacom.com, ja@ssi.bg, chavey@google.com, netdev@vger.kernel.org To: lk-netdev@lk-netdev.nosense.org Return-path: Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:60671 "EHLO sunset.davemloft.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755489Ab0ASKL2 (ORCPT ); Tue, 19 Jan 2010 05:11:28 -0500 In-Reply-To: <20100119100913.65177497@opy.nosense.org> Sender: netdev-owner@vger.kernel.org List-ID: From: Mark Smith Date: Tue, 19 Jan 2010 10:09:13 +1030 > I don't think this complies with the ARP RFC (RFC826). Walking through > the validation steps, Gratuitous ARP seems to only pass if there is an > existing entry in the table, otherwise they'd fail, as the target > address in the GA packet doesn't match that of the receiving host. It's fine if it's guarded by the per-device ARP_ACCEPT sysctl which defaults to off, and that's what he's doing.