The tale of a single MAC
graham at g-rock.net
Sat Jan 1 22:47:38 CST 2011
Two different suppliers - one was out of Wisconsin (I believe; it's been
some time), and the other of Phoenix for the most recent batch.
I have lots and lots of HP server gear - and never encountered such bizarre
On 1/1/11 9:59 PM, "Brielle Bruns" <bruns at 2mbit.com> wrote:
> On 1/1/11 8:33 PM, Graham Wooden wrote:
>> So here is the interesting part... Both servers are HP Proliant DL380 G4s,
>> and both of their NIC1 and NIC2 MACs addresses are exactly the same. Not
>> spoofd and the OS drivers are not mucking with them ... They¹re burned-in
>> I triple checked them in their respective BIOS screen. I acquired these two
>> machines at different times and both were from the grey market. The ³What
>> the ...² is sitting fresh in my mind ... How can this be?
> From the same grey market supplier?
> I know HP has a disc they put out which updates all the firmware/bios in
> a specific server model, its not too far fetched that a vendor might
> have a modified version that also either purposely or accidentally
> changes the MAC address. Off the top of my head, I'm not sure where the
> MAC is stored - maybe an eeprom or a portion of the bios flash. Or, it
> could be botched flashing that blew away the portion of memory where
> that was stored and the system defaulted to a built in value.
> Excellent example is, IIRC, the older sparc stuff, where the ethernet
> cards didn't have MAC addresses as part of the card, but were stored in
> non-volatile or battery backed memory. Memory goes poof, and you'll
> have problems. Some WRT54G/WAP54Gs suffer from the same problem when
> throwing third party firmware on there.
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