Subject: Re: MAC address for PCI hme (Re: CVS commit: syssrc/sys/arch/i386/conf)
To: None <tech-kern@netbsd.org>
From: Ignatios Souvatzis <ignatios@theory.cs.uni-bonn.de>
List: tech-kern
Date: 08/28/2001 12:15:55
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On Tue, Aug 28, 2001 at 03:21:21PM +0900, Curt Sampson wrote:
>=20
> Another option might be to use the output of a pseudo-random number
> number generator seeded from the hostname to construct the lower half
> of the MAC address (leaving us with only a one in sixteen million
> chance of a collision), though where we get an appropriate IEEE OUI
> (Organizationally Unique Identifier) for the upper half would still be
> an open question. We could spend $1250 and buy an OUI from IEE, but I'd
> suggest we just steal one from a company that's not likely to use theirs
> for Ethernet, such as Atari (00-00-36). :-)
Let me respectfully disagree here.
The correct approach would be to use a random value with the first bit zero
(unicast) and the 2nd bit one (not globally unique) on the wire, that is
abcdef10:XX:XX:XX:XX:XX for us computer types that have those bits
backwards ;-)
Regards,
-is
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