Re: Promise card no longer work as ide0/1?

From: Chad Miller (
Date: Wed May 03 2000 - 07:08:33 EST

> On Tue, 2 May 2000, Tim Coleman wrote:
> > Isn't there a problem with this in that it is possible (although not
> > necessary all that likely) for two nics to have the same MAC address?

On Tue, May 02, 2000 at 07:12:05PM -0700, Matthew Dharm wrote:
> My understanding on this was that it's not possible... the first byte or
> two is assigned to a manufacturer and the rest is supposed to be unique
> within that manufacturer. So all MAC addresses should be unique.

All are unique by default, but you can usually set the address to
whatever you wish, and indeed, some high-availability ideas suggest
using this mutability.

So, yes, it's possible to do this on the same machine, but is it ever
useful? If not, then addresses are a great index, assuming you're never
changing addresses willy-nilly.

                                                - chad

Chad Miller <>     URL:
"Any technology distinguishable from magic is insufficiently advanced".
First corollary to Clarke's Third Law (Jargon File, v4.2.0, 'magic')

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