From owner-freebsd-questions@FreeBSD.ORG Tue Apr 8 02:43:28 2014 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 8B6CCB61 for ; Tue, 8 Apr 2014 02:43:28 +0000 (UTC) Received: from nm14-vm4.access.bullet.mail.bf1.yahoo.com (nm14-vm4.access.bullet.mail.bf1.yahoo.com [216.109.115.19]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 3D4A8162B for ; Tue, 8 Apr 2014 02:43:27 +0000 (UTC) Received: from [66.196.81.159] by nm14.access.bullet.mail.bf1.yahoo.com with NNFMP; 08 Apr 2014 02:41:27 -0000 Received: from [98.139.221.250] by tm5.access.bullet.mail.bf1.yahoo.com with NNFMP; 08 Apr 2014 02:41:27 -0000 Received: from [127.0.0.1] by smtp120.sbc.mail.bf1.yahoo.com with NNFMP; 08 Apr 2014 02:41:27 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rogers.com; s=s1024; t=1396924887; bh=TBnKOqf3gLQxInuJ2CSzgZ7nLKJOUuSg3uF25E8b6Y4=; h=X-Yahoo-Newman-Id:X-Yahoo-Newman-Property:X-YMail-OSG:X-Yahoo-SMTP:X-Rocket-Received:Date:From:To:Subject:Message-ID:In-Reply-To:References:X-Mailer:Mime-Version:Content-Type:Content-Transfer-Encoding; b=SzvrWy3uVFtoDKu/dkV/YjLR17xwRjPF5hnwe0SJV6XQJB4YKxylHVh6M/UyQ/nOAguyqSHPQ2yUdgDp6qzyiAdNaKTuPtJULX5MbNnwK9S6gL4gVWI6zpDt9oW9JiLjUWggYldycLHtHSHN7H1C67rwgIuryXOt5LdiaeW1R04= X-Yahoo-Newman-Id: 470368.34093.bm@smtp120.sbc.mail.bf1.yahoo.com X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: lt.FkcYVM1l3P_9ftWVpv2RuRtpZsZWEEJePctzOHCyNK4Z OQA8rSjpoe7gWPIFjbqkejeKaiMtYDti6MmzyhdSV.GtIim8OThzKQ1s92lF 6.SQoGjiIwpc4OgHn0b78XiOqTwIS.GK_u__TZ5jc4ex8rTSznaIVffPBXzL 6SacVeCaFxRmEjh70HsnGMB8Pi__z7fsTFBfH6NUEjPzZoDlWFjjPEh8itYm wGatOOzR3i2Opy8BWFKzdPACVs5DTowpsLdHhO7OymNCyCsOhhDywLIpglRC u2xFLVJK..0NyY0dOM.PyeC2LYGxDA0e9pLoJMoP7cS.HyrnkAY.7CcofINQ 5m9bMI_jbcvZCrjsIgdnWeifyr_o8bhhQHnVHWiuENwaBDatgLxzWraVSB9s WpoodbH0nbHcqIfAJy7QRyQNDKIW2YFcZDjE9BPOn_Y8VZ_c.7hKhD3EUcxh qUiWAlvk7MDslYWOfRorx3Vz1n_PMpYBhv.UWf8deLEN4weVEVhN777RTOUV M_z3qqOPhq1DoWCG.vOD_FCPk_e_YTIK16NNzEEgPtROA50rTV6sTbNWSgDh UDZISimpyhlIAnuEQpV8r_jpnFEVmamcFrnrvWqcB.dejlIp8ps42qW4- X-Yahoo-SMTP: N82WFx6swBBjwcHWPFR2CGt6udzA8RPrA.xm0enFFXaK2g-- X-Rocket-Received: from europa (mike.jeays@99.224.170.139 with plain [98.139.221.125]) by smtp120.sbc.mail.bf1.yahoo.com with SMTP; 08 Apr 2014 02:41:27 +0000 UTC Date: Mon, 7 Apr 2014 22:41:16 -0400 From: Mike Jeays To: freebsd-questions@freebsd.org Subject: Re: MAC address changed Message-ID: <20140407224116.4a10017c@europa> In-Reply-To: References: <20140407201832.5f89976b@europa> X-Mailer: Claws Mail 3.8.1 (GTK+ 2.24.17; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 08 Apr 2014 02:43:28 -0000 On Tue, 08 Apr 2014 03:05:40 +0200 "Michael Ross" wrote: > On Tue, 08 Apr 2014 02:18:32 +0200, Mike Jeays > wrote: > > > More hardware related than FreeBSD - I have an old Pentium 4 with > > a Realtek network card, that I use for backups. I had a power failure > > yesterday, and on reboot, the MAC address on the card has changed from > > 00:e0:18:94:55:89 > > to > > 00:e0:18:94:e0:89 > > > > Anyone have an explanation for this surprising behaviour? > > RealTek has produced really bad cards for a while, > you may have one of those ( especially if it is from the Pentium 4 days ). > > http://www.fefe.de/linuxeth/realtek.txt ( from 2001 ) > "For example RealTeks tend to change their MAC-Address wihtout motivation." > > I've never noticed MAC changes, but I've had bad performance problems > with 8139 cards -- maxing out at ~70MBit. > Best to use another one, really. > > > Michael > > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org" I tried Joshua Lokken's suggestion, and turned the machine off for half an hour or so. The MAC address magically reverted back to its original value. It is such an old machine I will put up with it for now, but the card is clearly due for replacement. Thanks for the suggestions. The link above is quite entertaining, and not at all complimentary.