On Sun, 2 Jan 2011, Steven Bellovin wrote:
This was actually the intended way to use MAC addresses, to used as
host addresses rather than as individual interface addresses, according
to the following paper -
48-bit Absolute Internet and Ethernet Host Numbers
Yogan K. Dalal and Robert
On Sun, 2 Jan 2011, Lynda wrote:
Google does NOT know all. I was there. I have had to deal with a
building full of such wickedness. I administered DNS (in my copious
spare time) for two subdomains, and managed the network in the building
(a not inconsiderable /22, and also in my spare
On Mon, jan 03, 2011 at 07:05:24, Mikael Abrahamsson wrote:
Subject: Re: The tale of a single MAC
On Mon, 3 Jan 2011, Dobbins, Roland wrote:
I remember that there were several high-profile instances of
duplicate
MAC addresses being burnt into NICs during the 1990s - once every
2-3
On 01/01/2011 09:33 PM, Graham Wooden wrote:
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
One interesting aside to all of this... HP Lefthand SAN actually licenses
the SAN/IQ software off of the NIC1 MAC address. I can't help but wonder if
the MAC address is set to that specific address to possibly get around that
(perhaps a leaked license or something).
If nothing else... You can
Date: Mon, 3 Jan 2011 08:45:54 +1030
From: Mark Smith na...@85d5b20a518b8f6864949bd940457dc124746ddc.nosense.org
Hi,
On Sun, 2 Jan 2011 08:50:42 -0500
Steven Bellovin s...@cs.columbia.edu wrote:
On Jan 1, 2011, at 11:33 24PM, Mark Smith wrote:
On Sat, 01 Jan 2011 20:59:16
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.
On Jan 1, 2011, at 11:33 24PM, Mark Smith wrote:
On Sat, 01 Jan 2011 20:59:16 -0700
Brielle Bruns br...@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
About 11-12 years ago, we ghosted Compaq Prosignia 330? desktops with
Intel NICs. When we ghosted them, some of the desktops ended up with
the same MAC addresses on the NICs. It turned out that there were two
different models of Intel NICs in the desktops and ghosting the
desktop with the second
-- Original Message ---
From: Graham Wooden gra...@g-rock.net
Hi there,
I encountered an interesting issue today and I found it so bizarre
so I thought I would share it.
I brought online a spare server to help offload some of the recent
VMs that I have been deploying.
I should note -- this isn't that surprising. The IPv6 stateless autoconfig
RFCs have always assumed that this could happen, which is why duplicate
address detection is mandatory.
Fresh install and the NICs are Broadcom b57 10/100/1000, I believe.
- Reply message -
From: Randy McAnally r...@fast-serv.com
Date: Sun, Jan 2, 2011 8:53 am
Subject: The tale of a single MAC
To: Graham Wooden gra...@g-rock.net, nanog@nanog.org
-- Original Message ---
In the early 90's a friend of mine got a box of 10 HP cards with all the same
MAC address.
- Original Message -
From: Graham Wooden gra...@g-rock.net
To: nanog@nanog.org
Sent: Sunday, 2 January, 2011 4:33:46 PM
Subject: The tale of a single MAC
Hi there,
I encountered an interesting
Hi,
On Sun, 2 Jan 2011 08:50:42 -0500
Steven Bellovin s...@cs.columbia.edu wrote:
On Jan 1, 2011, at 11:33 24PM, Mark Smith wrote:
On Sat, 01 Jan 2011 20:59:16 -0700
Brielle Bruns br...@2mbit.com wrote:
On 1/1/11 8:33 PM, Graham Wooden wrote:
snip
Excellent example is, IIRC,
On Sat, Jan 01, 2011 at 09:33:46PM -0600, Graham Wooden wrote:
Hi there,
I encountered an interesting issue today and I found it so bizarre ? so I
thought I would share it.
I brought online a spare server to help offload some of the recent VMs that
I have been deploying. Around the same
On Jan 2, 2011, at 5:15 54PM, Mark Smith wrote:
Hi,
On Sun, 2 Jan 2011 08:50:42 -0500
Steven Bellovin s...@cs.columbia.edu wrote:
On Jan 1, 2011, at 11:33 24PM, Mark Smith wrote:
On Sat, 01 Jan 2011 20:59:16 -0700
Brielle Bruns br...@2mbit.com wrote:
On 1/1/11 8:33 PM, Graham
On Jan 2, 2011, at 1:24 PM, Franck Martin wrote:
In the early 90's a friend of mine got a box of 10 HP cards with all the same
MAC address.
In my early days of network admining, a coworker told me a (apocryphal) story
of 3com shipping a batch of 80K cards with identical MAC addresses, which
On Jan 2, 2011, at 8:39 PM, Corey Quinn wrote:
On Jan 2, 2011, at 1:24 PM, Franck Martin wrote:
In the early 90's a friend of mine got a box of 10 HP cards with all the
same MAC address.
In my early days of network admining, a coworker told me a (apocryphal) story
of 3com shipping a
On 1/2/2011 6:00 PM, Marshall Eubanks wrote:
On Jan 2, 2011, at 8:39 PM, Corey Quinn wrote:
On Jan 2, 2011, at 1:24 PM, Franck Martin wrote:
In the early 90's a friend of mine got a box of 10 HP cards with
all the same MAC address.
In my early days of network admining, a coworker told
On Jan 3, 2011, at 10:31 AM, Lynda wrote:
My guess is that you'll never find it on Google, since it happened around
1993-4 or so.
I remember that there were several high-profile instances of duplicate MAC
addresses being burnt into NICs during the 1990s - once every 2-3 years, IIRC.
And
On Mon, 3 Jan 2011, Dobbins, Roland wrote:
I remember that there were several high-profile instances of duplicate
MAC addresses being burnt into NICs during the 1990s - once every 2-3
years, IIRC. And those were just the ones that were discussed publicly.
D-Link shipped NAT-boxes around
I've seen duplicate MAC addresses but only on no name made in china
NICs installed on cheap (assembled from parts) PCs at a school
computer lab.
On Sun, Jan 2, 2011 at 9:03 AM, Graham Wooden gra...@g-rock.net wrote:
In the last 15 years of being in IT, I have never encountered a ³burned-in²
Seen this on six-figure gateways.
-RR
On 1/1/11, Suresh Ramasubramanian ops.li...@gmail.com wrote:
I've seen duplicate MAC addresses but only on no name made in china
NICs installed on cheap (assembled from parts) PCs at a school
computer lab.
On Sun, Jan 2, 2011 at 9:03 AM, Graham Wooden
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
On Jan 2, 2011, at 10:33 AM, Graham Wooden wrote:
What are the odds, that HP would dup’d them and that both would eventually
end up at my shop?
There may be some setting you're overlooking or a bug which needs an update to
fix, or you may simply have purchased HP ProLiant *cases*, rather
So along simlar lines, Ubiquiti sell routerstation pro boards with
sequential MAC addresses.
The trouble is they've allocated a single MAC for the first port - the
second ethernet port (also attached to the bridge) doesn't get a second
MAC.
So in a purchase of a few hundred boards, we had plenty
On Sat, 01 Jan 2011 20:59:16 -0700
Brielle Bruns br...@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
i have seen dups in 3com, dell, and hp kit over the years.
the best was moving mac addresses btwn 802,3 and 802.5 cards.
--bill
On Sun, Jan 02, 2011 at 03:03:24PM +1030, Mark Smith wrote:
On Sat, 01 Jan 2011 20:59:16 -0700
Brielle Bruns br...@2mbit.com wrote:
On 1/1/11 8:33 PM, Graham
No - these are Genuine HP Servers. Both servers have the latest BIOSs and
firmware applied to the board as well as cards.
The search results that I have seen didn't apply to the actual bios, rather
to guest Oss mucking or teamming.
On 1/1/11 9:56 PM, Dobbins, Roland rdobb...@arbor.net wrote:
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
issue.
On 1/1/11 9:59 PM, Brielle Bruns br...@2mbit.com wrote:
On 1/1/11 8:33
On 02/01/2011, at 2:33 PM, Graham Wooden wrote:
I encountered an interesting issue today and I found it so bizarre – so I
thought I would share it.
Had a fun one with D-Link ADSL modems a few years ago. The MAC address used to
source PPPoE frames from the ADSL interface was the same in a
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
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