nanog mailing list archives

Re: what about 48 bits?


From: Mikael Abrahamsson <swmike () swm pp se>
Date: Sun, 4 Apr 2010 17:41:34 +0200 (CEST)

On Sun, 4 Apr 2010, jim deleskie wrote:

I've seen duplicate addresses in the wild in the past, I assume there
is some amount of reuse, even though they are suppose to be unique.

5 percent of the mac addresses in a ADSL population used the same MAC address. Turned out to be some D-link device that didn't have unique address but they all had the same, and had a feature where you could "clone" the internal PC MAC address if you wanted to, otherwise it used some default address.

D-link support responded to customer inquiries with "yes, we know that they're not unique enough". Nuff said, avoid.

--
Mikael Abrahamsson    email: swmike () swm pp se


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