From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sebastian Fett Subject: ARP response with link local IP, why not broadcast Date: Tue, 21 Jul 2015 16:38:16 +0200 Message-ID: <55AE5958.3020009@gmx.de> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit To: netdev@vger.kernel.org Return-path: Received: from mout.gmx.net ([212.227.15.15]:64023 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754598AbbGUOiU (ORCPT ); Tue, 21 Jul 2015 10:38:20 -0400 Received: from [192.168.11.112] ([94.186.167.49]) by mail.gmx.com (mrgmx001) with ESMTPSA (Nemesis) id 0Lt2BW-1YoVW71sTK-012WbL for ; Tue, 21 Jul 2015 16:38:17 +0200 Sender: netdev-owner@vger.kernel.org List-ID: Hello! According to RFC3927 every ARP packet (reply and request) should be sent as link layer broadcast as long as the sender IP is a link local address. (see chapter 2.5). That functionality would help me a lot with a use case I have with our application. But it is not implemented in the kernel that way. Does anyone know why? Regards, Sebastian