From owner-freebsd-questions@FreeBSD.ORG Mon Jan 24 19:45:39 2011 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id B4D6B106566C for ; Mon, 24 Jan 2011 19:45:39 +0000 (UTC) (envelope-from cswiger@mac.com) Received: from asmtpout021.mac.com (asmtpout021.mac.com [17.148.16.96]) by mx1.freebsd.org (Postfix) with ESMTP id 98D148FC0C for ; Mon, 24 Jan 2011 19:45:39 +0000 (UTC) MIME-version: 1.0 Content-transfer-encoding: 7BIT Content-type: text/plain; CHARSET=US-ASCII Received: from cswiger1.apple.com ([17.209.4.71]) by asmtp021.mac.com (Oracle Communications Messaging Exchange Server 7u4-20.01 64bit (built Nov 21 2010)) with ESMTPSA id <0LFJ00EN3LJLIAJ0@asmtp021.mac.com> for freebsd-questions@freebsd.org; Mon, 24 Jan 2011 11:45:22 -0800 (PST) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.2.15,1.0.148,0.0.0000 definitions=2011-01-24_08:2011-01-24, 2011-01-24, 1970-01-01 signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 ipscore=0 suspectscore=0 phishscore=0 bulkscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx engine=6.0.2-1012030000 definitions=main-1101240125 From: Chuck Swiger In-reply-to: <4D3DC87E.1010400@blakemfg.com> Date: Mon, 24 Jan 2011 11:45:21 -0800 Message-id: <68D41D76-35A9-447F-BB6F-6822E3B05589@mac.com> References: <20110123023834.19098.qmail@joyce.lan> <4D3D9CBC.7060700@herveybayaustralia.com.au> <4D3DC87E.1010400@blakemfg.com> To: Fred X-Mailer: Apple Mail (2.1082) Cc: freebsd-questions@freebsd.org Subject: Re: Changing the MAC address on a LAN adapter X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 24 Jan 2011 19:45:39 -0000 On Jan 24, 2011, at 10:44 AM, Fred wrote: > Ethernet MAC addresses are assigned by the manufacturer of the equipment. Each unit gets a unique address which generally can't be changed and shouldn't be changed. The manufacturer buys a block of addresses from the IEEE. Yes, although folks can set the locally administered bit in the 6-byte MAC address instead of using globally administered addresses & vendor-assigned blocks from IEEE OUI... Regards, -- -Chuck