From owner-freebsd-net@FreeBSD.ORG Wed May 28 16:56:39 2003 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id C32FF37B401 for ; Wed, 28 May 2003 16:56:39 -0700 (PDT) Received: from relay2.softcomca.com (relay2.softcomca.com [168.144.1.68]) by mx1.FreeBSD.org (Postfix) with ESMTP id EFD3B43F3F for ; Wed, 28 May 2003 16:56:38 -0700 (PDT) (envelope-from akanwar@digitarchy.com) Received: from M2W054.mail2web.com ([168.144.251.161]) by relay2.softcomca.com with Microsoft SMTPSVC(5.0.2195.5576); Wed, 28 May 2003 20:00:23 -0400 Message-ID: <63340-22003532823577384@M2W054.mail2web.com> X-Priority: 3 X-Originating-IP: 66.162.33.181 X-URL: http://mail2web.com/ From: "akanwar@digitarchy.com" To: freebsd-net@freebsd.org Date: Wed, 28 May 2003 19:57:07 -0400 MIME-Version: 1.0 Content-type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable X-OriginalArrivalTime: 29 May 2003 00:00:23.0226 (UTC) FILETIME=[4D2641A0:01C32575] Subject: gratuitous ARP with em interface. X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: akanwar@digitarchy.com List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 28 May 2003 23:56:40 -0000 Hi all, =20 Is there a known issue with alias IPs on em interfaces not sending out gratuitous arps ? The situation is as follows: I am running a custom redundancy daemon that migrates the IP address of a= server from one interface to another in case the active network path fails= =2E Till now I was experimenting with two fxp interfaces and everything worked= perfectly=2E i=2Ee=2E when the ip address moved over (using a perl script = to run ifconfig commands) it sent out grat=2E arps for each of its alias IPs=2E T= his allowed the router to update its Arp table and talk to the newly active interface=2E Now when I try running the code with em (gigabit Ethernet over copper) NICs, I simply do not see the gratuitous arps come out of the new interfac= e=2E I am at a loss to understand what has changed=2E Could it be that the line= DOWN -> UP time of the em interface is longer thereby causing a loss of ARPs ? Any suggestions ? Thank you=2E =20 =20 -------------------------------------------------------------------- mail2web - Check your email from the web at http://mail2web=2Ecom/ =2E