From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rick Jones Subject: Re: [RFC] ethernet: avoid pre-assigned OUI values in random_ether_addr Date: Fri, 13 May 2011 17:44:58 -0700 Message-ID: <1305333898.8149.715.camel@tardy> References: <20110513171729.247b126e@nehalam> <1305332905.8149.705.camel@tardy> <20110513173213.491c74a1@nehalam> Reply-To: rick.jones2@hp.com Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org To: Stephen Hemminger Return-path: Received: from g6t0184.atlanta.hp.com ([15.193.32.61]:8107 "EHLO g6t0184.atlanta.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759767Ab1ENAo7 (ORCPT ); Fri, 13 May 2011 20:44:59 -0400 In-Reply-To: <20110513173213.491c74a1@nehalam> Sender: netdev-owner@vger.kernel.org List-ID: On Fri, 2011-05-13 at 17:32 -0700, Stephen Hemminger wrote: > On Fri, 13 May 2011 17:28:25 -0700 > Rick Jones wrote: > > > On Fri, 2011-05-13 at 17:17 -0700, Stephen Hemminger wrote: > > > There are some addresses in the assigned vendor block that don't obey > > > the locally assigned convention. These should be avoided by random_ether_addr > > > assignment. > > > > How "recent" are these violations? Is there really a non-trivial chance > > of colliding? Much more than two or more stations in the same broadcast > > domain randomly picking the same random MAC anyway? > > > > At one level, avoiding using those OUIs seems to be a tacit approval of > > the violations. > > These were assigned long ago in the early days of Ethernet. > It makes sense to me to avoid them as just good policy. Well, then by a quick glance at http://standards.ieee.org/develop/regauth/oui/oui.txt it looks like there are more to add... (some overlap with your list, I've not checked the entire thing, how the name conflicts should be resolved I've no idea) raj@tardy:~$ grep ^02- oui.txt 02-07-01 (hex) RACAL-DATACOM 02-1C-7C (hex) PERQ SYSTEMS CORPORATION 02-60-86 (hex) LOGIC REPLACEMENT TECH. LTD. 02-60-8C (hex) 3COM CORPORATION 02-70-01 (hex) RACAL-DATACOM 02-70-B0 (hex) M/A-COM INC. COMPANIES 02-70-B3 (hex) DATA RECALL LTD 02-9D-8E (hex) CARDIAC RECORDERS INC. 02-AA-3C (hex) OLIVETTI TELECOMM SPA (OLTECO) 02-BB-01 (hex) OCTOTHORPE CORP. 02-C0-8C (hex) 3COM CORPORATION 02-CF-1C (hex) COMMUNICATION MACHINERY CORP. 02-E6-D3 (hex) NIXDORF COMPUTER CORPORATION The ieee's list doesn't have any 52's though. rick