Re: rtl8187: Invalid hwaddr! Using randomly generated MAC address

John W. Linville
2007-08-17T17:44:29Z

Probably want to copy linux-wireless@vger.kernel.org on
wireless-related posts. Adding Michael Wu to the CC: as well...

John

On Fri, Aug 17, 2007 at 04:59:33PM +0100, Alan Jenkins wrote:
> I've just acquired this buggy piece of hardware otherwise known as a
> NetGear WG111v2. I googled and eventually found an explanation in the
> form of source code here:
>
> <http://www.gelato.unsw.edu.au/lxr/source/include/linux/etherdevice.h#L93>.
>
>
> It seems linux rejects the hardware MAC address because it is either all
> zero or a multicast address (ie the first byte has 0x01 set.
>
> On the side of this buggy piece of hardware is written:
>
> MAC 001B2F7604E6
>
> which AFAICS is valid; it's definitely not all zeros and the first byte
> has no bits set at all.
>
>
> Q. Udev can't access the invalid mac address. Does that mean there is
> no persistent identifier for the device? I know I could identify a
> device as a NetGear WG111v2, but I do have two of them. It would be
> nice if I could fix them by adding udev rules to identify individual
> devices, and set their MAC address to what it's "supposed" to be.
>
> /me scrabbles around for a Windows installation to find out whether the
> MAC address is somehow set correctly on the Other OS.
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--
John W. Linville
linville@tuxdriver.com