From owner-freebsd-net@FreeBSD.ORG Thu May 29 01:32:57 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 A68B037B401; Thu, 29 May 2003 01:32:57 -0700 (PDT) Received: from whale.sunbay.crimea.ua (whale.sunbay.crimea.ua [212.110.138.65]) by mx1.FreeBSD.org (Postfix) with ESMTP id 71D2843F75; Thu, 29 May 2003 01:32:51 -0700 (PDT) (envelope-from ru@whale.sunbay.crimea.ua) Received: from whale.sunbay.crimea.ua (ru@localhost [127.0.0.1]) h4T8WUEd052724 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Thu, 29 May 2003 11:32:30 +0300 (EEST) (envelope-from ru@whale.sunbay.crimea.ua) Received: (from ru@localhost) by whale.sunbay.crimea.ua (8.12.9/8.12.8/Submit) id h4T8WN5r052701; Thu, 29 May 2003 11:32:23 +0300 (EEST) (envelope-from ru) Date: Thu, 29 May 2003 11:32:23 +0300 From: Ruslan Ermilov To: "akanwar@digitarchy.com" , Prafulla Deuskar Message-ID: <20030529083223.GA52253@sunbay.com> References: <63340-22003532823577384@M2W054.mail2web.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="RnlQjJ0d97Da+TV1" Content-Disposition: inline In-Reply-To: <63340-22003532823577384@M2W054.mail2web.com> User-Agent: Mutt/1.5.4i cc: freebsdnic@mailbox.cps.intel.com cc: freebsd-net@FreeBSD.org Subject: Re: gratuitous ARP with em interface. X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 29 May 2003 08:32:58 -0000 --RnlQjJ0d97Da+TV1 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, May 28, 2003 at 07:57:07PM -0400, akanwar@digitarchy.com wrote: > Hi all, > =20 > Is there a known issue with alias IPs on em interfaces not sending out > gratuitous arps ? >=20 > 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 fail= s. > Till now I was experimenting with two fxp interfaces and everything worked > perfectly. i.e. when the ip address moved over (using a perl script to run > ifconfig commands) it sent out grat. arps for each of its alias IPs. This > allowed the router to update its Arp table and talk to the newly active > interface. >=20 > 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 interfa= ce. >=20 > I am at a loss to understand what has changed. Could it be that the line > DOWN -> UP time of the em interface is longer thereby causing a loss of > ARPs ? Any suggestions ? >=20 Yes, I can reproduce this too, no gratuitous ARP is sent. Cheers, --=20 Ruslan Ermilov Sysadmin and DBA, ru@sunbay.com Sunbay Software AG, ru@FreeBSD.org FreeBSD committer. --RnlQjJ0d97Da+TV1 Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (FreeBSD) iD8DBQE+1cWXUkv4P6juNwoRAp2CAJ9/+UGvcS65PByxUOYkJYwoR8ZJMgCdG6NP 1FKPKstk7WQiWlwbRL8QjVs= =JAvd -----END PGP SIGNATURE----- --RnlQjJ0d97Da+TV1--