The tale of a single MAC

Seth Mattinen sethm at
Sun Jan 2 00:56:24 CST 2011

On 1/1/11 7:33 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?
> In the last 15 years of being in IT, I have never encountered a ³burned-in²
> duplicated MACs across two physically different machines.  What are the
> odds, that HP would dup¹d them and that both would eventually end up at my
> shop?  Or maybe this type of thing isn¹t big of deal... ?

None of the HP servers I have contain duplicate MAC addresses. (I just
looked through all the iLO2 cards to make sure I wasn't lying.) I'll
send you some details offlist.


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