From owner-freebsd-chat Wed Mar 17 10:53:55 1999 Delivered-To: freebsd-chat@freebsd.org Received: from mercury.webnology.com (mercury.webnology.com [209.155.51.2]) by hub.freebsd.org (Postfix) with ESMTP id 9571C14C0A for ; Wed, 17 Mar 1999 10:53:52 -0800 (PST) (envelope-from jooji@webnology.com) Received: from localhost (jooji@localhost) by mercury.webnology.com (8.9.2/8.9.2) with SMTP id MAA23194; Wed, 17 Mar 1999 12:54:46 -0600 (CST) Date: Wed, 17 Mar 1999 12:54:46 -0600 (CST) From: "Jasper O'Malley" To: Brett Glass Cc: Dag-Erling Smorgrav , Greg Lehey , The Hermit Hacker , Mark Ovens , freebsd-chat@FreeBSD.ORG Subject: Re: Intel PIII "Anti Piracy Feature"? In-Reply-To: <4.1.19990317093554.03e4dc60@localhost> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-chat@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Wed, 17 Mar 1999, Brett Glass wrote: > At 07:04 AM 3/17/99 +0100, Dag-Erling Smorgrav wrote: > > >No, what he means is that 16 of the 48 bytes of the MAC are the vendor > >code. But this is not relevant since the machine in question was an > >x86, and the vendor code might be anything (or nothing at all). > > Actually, the IEEE still assigns ranges of Ethernet addresses to vendors > in an attempt to avoid overlap between MAC addresses. It has nothing to > do with the type of CPU.... It's a semantic point, but the IEEE assigns Organizationally Unique Identifiers, which are 24-bit (not 16-bit) identification numbers that most network equipment manufacturers use for the first 24 bits of the MAC address on the equipment they sell. The OUI can and is used for other things, and lazy/sleazy NIC manufacturers use MAC addresses that have nothing to do with an OUI. Cheers, Mick The Reverend Jasper P. O'Malley dotdot:jooji@webnology.com Systems Administrator ringring:asktheadmiral Webnology, LLC woowoo:http://www.webnology.com/~jooji To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-chat" in the body of the message