From owner-freebsd-net@FreeBSD.ORG Thu May 29 04:39:02 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 71ACA37B401; Thu, 29 May 2003 04:39:02 -0700 (PDT) Received: from silver.he.iki.fi (silver.he.iki.fi [193.64.42.241]) by mx1.FreeBSD.org (Postfix) with ESMTP id 01C0D43F75; Thu, 29 May 2003 04:39:01 -0700 (PDT) (envelope-from pete@he.iki.fi) Received: from he.iki.fi (localhost.he.iki.fi [127.0.0.1]) by silver.he.iki.fi (8.12.9/8.11.4) with ESMTP id h4TBctk8086758; Thu, 29 May 2003 14:38:57 +0300 (EEST) (envelope-from pete@he.iki.fi) Message-ID: <3ED5F14E.8070205@he.iki.fi> Date: Thu, 29 May 2003 14:38:54 +0300 From: Petri Helenius User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.3) Gecko/20030501 X-Accept-Language: English [en],Finnish [fi] MIME-Version: 1.0 To: Ruslan Ermilov References: <63340-22003532823577384@M2W054.mail2web.com> <20030529083223.GA52253@sunbay.com> In-Reply-To: <20030529083223.GA52253@sunbay.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit cc: freebsdnic@mailbox.cps.intel.com cc: "akanwar@digitarchy.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 11:39:02 -0000 I haven't looked that deep into why, but em is quite slow on coming up compared to fxp for example. Probably something to do with hardware re-initialization. Pete Ruslan Ermilov wrote: >On Wed, May 28, 2003 at 07:57:07PM -0400, akanwar@digitarchy.com wrote: > > >>Hi all, >> >>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. >>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. >> >>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 interface. >> >>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 ? >> >> >> >Yes, I can reproduce this too, no gratuitous ARP is sent. > > >Cheers, > >