[CentOS] the wandering MAC?

Giles Coochey giles at coochey.net
Wed Oct 13 12:46:03 EDT 2010


  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

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?


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