[AusNOG] Internal use MAC addresses

[Wade Roberts]

On 2013-02-23, at 20:27, Geordie Guy <elomis at gmail.com> wrote:

> Hey folks,
> 
> Is there a "555" style best practice for MAC addresses?  I'm mucking around with programming electronics and writing Ethernet bits and pieces and while it's commonplace for me to hardcode 192.168.0/24 addresses to projects, I also need to code MAC addresses.  Is there an OUI equivalent of 172.16/192.168/10.?  or does nobody care because it's not relevant outside a layer 2 domain...
> 
> 
> - Geordie
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2 Options:

1: Pick anything not allocated here: http://standards.ieee.org/develop/regauth/oui/oui.txt

2: Make one up, set the 7th bit (see U/L or X bit) to 1 to make it local only.

--
Wade