nanog mailing list archives
RE: The tale of a single MAC
From: "Daniel Dib" <daniel.dib () reaper nu>
Date: Mon, 3 Jan 2011 10:40:02 +0100
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 ofduplicateMAC addresses being burnt into NICs during the 1990s - once every 2-3 years, IIRC. And those were just the ones that were discussedpublicly. D-Link shipped NAT-boxes around 2003-2004 or so with identical MAC addresses (and a "clone your PC mac address to the WAN interface"- functionality). I checked my then employer ADSL network and 5% of the customer ports had the same MAC address, D-Link support alledgedly said something about the MAC address not being "unique enough" and directed their customers to the cloning functionality to "solve" the
problem.
-- Mikael Abrahamsson email: swmike () swm pp se
Years ago D-link and Linksys and maybe other vendors used the source MAC of 00:00:00:00:00:00 which isn't very nice and could cause interesting issues. At my current job we used to have a routine to find these MACs and tell the users to change to a valid address.
Current thread:
- Re: The tale of a single MAC, (continued)
- Re: The tale of a single MAC Graham Wooden (Jan 02)
- Re: The tale of a single MAC Eric Tow (Jan 02)
- Re: The tale of a single MAC Randy McAnally (Jan 02)
- Re: The tale of a single MAC Steven Bellovin (Jan 02)
- Re: The tale of a single MAC Franck Martin (Jan 02)
- Re: The tale of a single MAC Corey Quinn (Jan 02)
- Re: The tale of a single MAC Marshall Eubanks (Jan 02)
- Re: The tale of a single MAC Lynda (Jan 02)
- Re: The tale of a single MAC Dobbins, Roland (Jan 02)
- Re: The tale of a single MAC Mikael Abrahamsson (Jan 02)
- RE: The tale of a single MAC Daniel Dib (Jan 03)
- Re: The tale of a single MAC Corey Quinn (Jan 02)
- Re: The tale of a single MAC Jethro R Binks (Jan 06)