Date: Tue, 3 Mar 2009 08:42:16 +0200 From: Saku Ytti <saku+nanog@ytti.fi>
On (2009-03-02 17:31 -0800), Kevin Oberman wrote:
http://standards.ieee.org/regauth/oui/oui.txt 02-07-01 (hex) RACAL-DATACOM
Would be interesting to see what are the historical reasons.Perhaps they simply predate the scheme or some might not even co-exist in ethernet network to begin with, in which case they might be better documented elsewhere.
IEEE after 802.3 was ratified. IEEE agreed to retain existing registrations and they have remained there.
So where does this leave the current local scape addresses being globally assigned? Is it possible that we will run into legit 02 MAC addresses in the wild?
Thee are properly "locally assigned",not "local scope" addresses, but the effect is the same. This is only a problem if you have multiple systems running DECnet (or some other protocol using this) with the same layer 3 address. That should never happen, so there should be no duplication. The only real issue I see is with IPv6 EUI-64 addresses and even in that case, there would have to be two systems getting their address space from the same router interface before there is a conflict. -- R. Kevin Oberman, Network Engineer Energy Sciences Network (ESnet) Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab) E-mail: oberman@es.net Phone: +1 510 486-8634 Key fingerprint:059B 2DDF 031C 9BA3 14A4 EADA 927D EBB3 987B 3751