> No, they are NOT unique. They _are_ "relatively unique" -- which is to say
> the manufacturer sequentially numbers the MAC when the card is ready to
> leave the plant (i.e. after QC, etc.) Eventually, the counter will roll
> over -- how many NICs has 3Com and Intel made?
No it never rolls over. In fact 3com became the first network vendor
to exhaust their range and get a second one I believe.
Other common misunderstanding. The base address is guaranteed to be unique
per host not per interface
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