The tale of a single MAC
bruns at 2mbit.com
Sat Jan 1 21:59:16 CST 2011
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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