[CentOS] the wandering MAC?

Timo Schoeler timo.schoeler at riscworks.net
Wed Oct 13 13:00:58 EDT 2010


On 10/13/2010 06:46 PM, Giles Coochey wrote:
>    On 13/10/2010 18:37, Boris Epstein wrote:
>> On Wed, Oct 13, 2010 at 12:35 PM, Benjamin Franz<jfranz at freerun.com>   wrote:
>>> On 10/13/2010 09:28 AM, Boris Epstein wrote:
>>>> What's happening is, it is showing up under one of the two MAC's:
>>>> either 00:0a:cd:1a:c1:71 or 00:00:00:00:c1:71. If you reboot it the
>>>> MAC stays the same; if you shutdown and do a full powerdown it seems
>>>> to change.
>>>>
>>> I would say the card is probably dying and replace it.
>>>
>> Thanks.
>>
>> That's possible, sure. I wonder though - it seems to work just fine
>> when it's up, pretty fast, no abnormal error rate, it is brand new.
>> But you could be right, of course.
>>
> I've tended to find that when a card is failing the MAC address starts
> setting itself to FF:FF:FF:FF:FF:FF not 00:00:00:XX:XX:XX

FF:FF:FF:FF:FF:FF is broadcast.

> The first three bytes are Vendor ID on a MAC address, you haven't got
> anything in there that might fiddle with that? Is it an OEM card?

Timo



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