Behaviour when ethernet MAC is 00:00:00:00:00:00 ?

Gilboa Davara gilboad at
Mon Nov 19 16:46:54 UTC 2007

On Mon, 2007-11-19 at 16:52 +0100, KH KH wrote:
> 2007/11/19, Michael Wiktowy <michael.wiktowy at>:
> > Hi,
> >
> > It seems recently one of my two onboard NICs has decided to not
> > remember its MAC address between reboots. Since I just updated the
> > BIOS firmware, I suspect that as the culprit but I also upgraded to
> > Fedora 8 about the same time so it may be to blame. I don't know.
> When you update the bios, the tool accept a parameter for the mac
> address.. Each time you flash the bios, you need to give the mac
> address for the integrated ethernet (usually written on the top of the
> mainboard ), so it can be hardcoded into the bios...
> Nicolas (kwizart)

I've updated my share of BIOS... Large share.
Never seen a BIOS upgrade that erases the MAC address.

Most likely the on-board NIC has been fried.

P.S. AFAIR you manually set the MAC address by adding "MACADDR=00:..."
to /etc/sysconfig/network-scripts/ifcfg-ethX

- Gilboa

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