On 13 August 2007, Johnny Hughes <johnny at centos.org> wrote: <snip> > How can 2 nics from different companies have the same mac address .... > I don't think that is possible. > each card needs a separate MAC address, at least the way I understand > networking. I agree with Doug and Johnny. My belief is that every NIC in the world is supposed to have a unique MAC address. Although the OP has been using these boards without problems, I suspect there is a defect on the boards.