From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 7 Aug 2001 21:56:00 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 7 Aug 2001 21:55:50 -0400 Received: from [202.81.130.34] ([202.81.130.34]:31496 "EHLO seawall.perth.wni.com") by vger.kernel.org with ESMTP id ; Tue, 7 Aug 2001 21:55:42 -0400 Message-Id: <5.1.0.14.0.20010808094513.00ab72c8@mailhost> X-Mailer: QUALCOMM Windows Eudora Version 5.1 Date: Wed, 08 Aug 2001 09:58:12 +0800 To: linux-kernel@vger.kernel.org From: Stuart Duncan Subject: ARP's frustrating behavior 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 Hi, I'm noticing on a machine with dual NICs that they they all seem to answer ARP queries, even if the request is not directed to their IP. Here's an example: ---8<--- 10:52:03.177863 eth1 B arp who-has eddy tell soliton 10:52:03.177895 eth1 > arp reply eddy (0:3:47:8:1a:64) is-at 0:3:47:8:1a:64 (0:90:27:41:c9:f4) 10:52:03.177875 eth0 B arp who-has eddy tell soliton 10:52:03.177908 eth0 > arp reply eddy (0:b0:d0:78:bc:92) is-at 0:b0:d0:78:bc:92 (0:90:27:41:c9:f4) --8<-- This is a problem for me because eth1 is 1000Mb fibre while eth0 is 100Mb, and almost all of the clients are caching the response from eth0 in preference to the response from eth1. I know this appeared on the list once before (20/08/1999, Chris Leech. "ARP (mis)behavior") however there was no definite answer. My questions are: Is this ARP behavior intentional? (I can't recreate the fault in other UNIX's) and if it is, is there a way to turn it off? Thank you, Stuart Duncan ---- Stuart Duncan Systems Administrator WNI Weathernews 31 Bishop Street JOLIMONT WA 6014