On Thu, Nov 16, 2006 at 10:48:16AM +0100, Nicolas Boullis wrote: > > Half of all MAC-48 addresses are "locally administered": those with the > > second-least-significant bit of the first byte set. > > Uh? > Looking at the list of allocated OUI > (http://standards.ieee.org/regauth/oui/oui.txt), I see that the > following OUI are allocated:
yes, I see. 18 of the 9781 assigned OUIs in that listing do have that bit set. Thanks for pointing that out. > All of them have the second-least-significant bit of the first byte set. > If this rule about being locally administered written somewhere? It would seem to contradict http://standards.ieee.org/regauth/groupmac/tutorial.html, though that seems kind of old because it references ISO/IEC 10039 for the definition of MAC addresses, and that's been superceded in 1995 by ISO/IEC 15802-1. I don't have access to either one atm. > (And, more surprising, there is also 11-00-AA which has the LSB of the > first byte set.) indeed, though that allocation is private. So who knows what it's really used for. Jason ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ User-mode-linux-user mailing list User-mode-linux-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-user
