[oclug] ethernet MAC Address
doug at jumpgate.homeip.net
Sun Feb 11 09:32:49 EST 2001
On Sunday 11 February 2001 08:40, you wrote:
> On Sun, Feb 11, 2001 at 07:11:01AM -0500, bbarnett at l8r.net wrote:
> > Yup.. I used to use it in Vancouver with the really old modems.. if I
> > took my one firewall box offline, I'd use the same mac address on the
> > other box's ethernet card to keep the same ip.
> > Worked like a charm.
> I don't think it works with all NICs, just the newer ones. Older ones
> had fixed MAC addresses, while the newer ones are configurable in firmware,
> I think. How a network admin is supposed to ensure they're all unique, I
> have no idea. It's supposed to be up to the manufacturer, so you'd better
> write down what your original MAC address was before you change it.
Trivia of the day - any DEC network card, or card compatible with DECNet,
will allow you to change the MAC address. It's part of the DECNet protocol -
DECNet changed the MAC address so that the DECNet address could be derived
from the MAC.
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