[AusNOG] Internal use MAC addresses

[Wade Roberts]

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.

--
Wade

 
On 2013-02-23, at 21:58, Keith Sinclair <kcsinclair at gmail.com> wrote:

> Geordie,
> 
> You are after a locally administered address
> 
> http://en.wikipedia.org/wiki/MAC_address
> 
> MAC's starting with 4000 are locally administered.
> 
> 
> Keith 
> 
> On 23/02/2013, at 8:06 PM, Lloyd Wood <lloyd.wood at yahoo.co.uk> wrote:
> 
>> "If it's not unique, it's not ethernet."
>> 
>> Um, no. See ausnog thread starting
>> http://lists.ausnog.net/pipermail/ausnog/2013-February/016484.html
>> 
>> On 23 Feb 2013, at 20:58, Paul Wilkins <paulwilkins369 at gmail.com> wrote:
>> 
>>> Alternatively, set B2 in the MAC's MSB to 1.This defines a locally administered address.
>>> 
>>> That said, if you buy a NIC that's branded "ethernet", the burnt in address will have been allocated by IANA to the manufacturer and will be unique. If it's not unique, it's not ethernet.
>>> 
>>> Paul Wilkins
>>> 
>>> On Sat, Feb 23, 2013 at 8:40 PM, Lloyd Wood <lloyd.wood at yahoo.co.uk> wrote:
>>> http://www.denx.de/wiki/DULG/WhereCanIGetAValidMACAddress
>>> 
>>> 
>>> On 23 Feb 2013, 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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