nanog mailing list archives

Re: what about 48 bits?


From: David Andersen <dga () cs cmu edu>
Date: Sun, 4 Apr 2010 11:10:56 -0400

There are some classical cases of assigning the same MAC address to every machine in a batch, resetting the counter 
used to number them, etc.;  unless shown otherwise, these are likely to be errors, not accidental collisions.

  -Dave

On Apr 4, 2010, at 10:57 AM, 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.

-jim

On Sun, Apr 4, 2010 at 11:53 AM, A.B. Jr. <skandor () gmail com> wrote:
Hi,

Lots of traffic recently about 64 bits being too short or too long.

What about mac addresses? Aren't they close to exhaustion? Should be. Or it
is assumed that mac addresses are being widely reused throughout the world?
All those low cost switches and wifi adapters DO use unique mac addresses?






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