Re: DAD question

[Bob Hinden <[e-mail]>]

Michael,

On Aug 12, 2012, at 9:20 AM, Michael Richardson wrote:

> 
>>>>>> "Bob" == Bob Hinden <[e-mail]> writes:
>    Bob> True, but the odds of this happening are very low.  I wonder if
>    Bob> we have any data on DAD detecting duplicate addresses and their
>    Bob> cause. 
> 
> In my experience, MAC address duplicates are almost always the result of
> too-true copy&paste'ing of virtual machine configurations :-)
> (You want to duplicate the virtual machine in order to try an upgrade...)
> 
>    Bob> For example, has any seen any actual duplicate MAC addresses?
>    Bob> It would be good to collect some data. 
> 
> if you remove 00:00:00:00:00:00 and ff:ff:ff:ff:ff:ff from the list,
> I've never seen a duplicate.  (all-zeros and all-ones are the result of
> the eeprom dying in various ways, or a driver getting confused.  Both
> will work until you get a second machine with the same problem)
> 

Thanks, very helpful.

Bob