Re: mac duplication

["dreamwvr () dreamwvr com" <dreamwvr () dreamwvr com>]

On Sat, Dec 13, 2003 at 11:23:57PM -0600, Burton M. Strauss III wrote:
> Um...
>
> The burned in address is (supposed to be) globally unique.  As a
> {vendor|OEM} you need to get a block from IEEE (See their OUI files) and are
> responsible for that block.  You can't get another one until you assert
> you've issued something like 90%+ of the last one.  So according to the very
> definition of the MAC address, it is globally unique.
>
> Which isn't to say it doesn't happen that mistakes are made during the
> manufacturing processes.   This does happen and - as someone else indicated
> on this thread - can be a brass plated b*tch to find.
in theory yes, however in practice see for example sea.c
which demonstrates that one can't trust this to be true.

Best Regards,
dreamwvr () dreamwvr com

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