[AusNOG] Internal use MAC addresses

[Glen Turner]

On Sat, 2013-02-23 at 22:08 +1100, Wade Roberts wrote:
> Not quite, setting the 'next-to-least-significant-bit of first octet
> of OUI', or the 7th bit, to 1 would make 02-00-00 the simplest example
> of this rule.

"Locally administered" isn't quite the same idea as IP's "private
internets" addressing.

Some protocols used locally administered MAC addresses as a well known
network services address or to avoid a ARP. Those protocols used
allocated addresses in the locally administered 02:, aa: and ab: locally
administered unicast ranges. So best to stay away from those.

As far as I know there's no range of locally administered unicast
addresses reserved by the IEEE for private networks. Last time I went
through all of the used-by-someone locally administered addresses I
arrived at 06:... as the lowest numbered initial byte which was
available for uncontested use.

-glen