Leo Bicknell wrote:
> * Users wish to replace a card but have it use the same MAC
>   address due to filters, static arp entries, caches that take too
>   long to expire, bootp entries that are based on MAC address, etc.
>   For years cards had the MAC in a separate ROM to make this possible
>   with a chip swap too.

I forgot this one.

Mostly, though, this is done for licensing software that uses
the MAC as the machine serial number.  Lot of code does that
on Windows... and not a little code on UNIX.

-- Terry

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