[134268] in North American Network Operators' Group
Re: The tale of a single MAC
daemon@ATHENA.MIT.EDU (Graham Wooden)
Sun Jan 2 08:23:27 2011
Date: Sun, 02 Jan 2011 07:22:33 -0600
From: Graham Wooden <graham@g-rock.net>
To: Seth Mattinen <sethm@rollernet.us>,
<nanog@nanog.org>
In-Reply-To: <4D202198.4070506@rollernet.us>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Hey Seth, thanks for the reply.
I don't use the iLO port, so I didn't look at it's MAC within the BIOS,
however my issue isn't that the MACs are the same within a physical machine=
.
They're different, just like all the other HP gear ... It's that I have two
machines that the MACs are identical. Like Server-A's NIC1 matches
Server-B's NIC1 ... And the same goes for NIC2. Heck, maybe even their iLO
matches too. I just re-read my post and I can see where maybe I didn't
explain it properly. Yesterday was a long day ...
I guess it's not that big of deal now, I resolved it rather quickly by
putting Server-B on another VLAN.
On 1/2/11 12:56 AM, "Seth Mattinen" <sethm@rollernet.us> wrote:
> On 1/1/11 7:33 PM, Graham Wooden wrote:
>>=20
>> So =A1=A9 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. No=
t
>> spoofd and the OS drivers are not mucking with them ... They=A9=F6re burned-=
in =A1=A9
>> 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 =A9=F8W=
hat
>> the ...=A9=F7 is sitting fresh in my mind ... How can this be?
>>=20
>> In the last 15 years of being in IT, I have never encountered a =A9=F8burned=
-in=A9=F7
>> duplicated MACs across two physically different machines. What are the
>> odds, that HP would dup=A9=F6d them and that both would eventually end up at=
my
>> shop? Or maybe this type of thing isn=A9=F6t big of deal... ?
>>=20
>=20
>=20
> 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.
>=20
> ~Seth
>=20
