Re: [coLinux-devel] Choosing ethernet addresse (was: No network anmore?)

[<ric...@gm...>]

On 08 Dec 2007 16:19:00 +0100, Rainer Zocholl
<Use...@zo...> wrote:
> ric...@gm...(ric...@gm...)  06.12.07 23:40
>
>
> >It's worth reading the section "Locally administered addresses" at
> >http://en.wikipedia.org/wiki/MAC_address and picking a permanent MAC
> >address for the tap or winpcap device.
>
>
> Interresting reading to "refurbish" ethernet knowledge ;-)
>
> So:
> the generated MAC adresses of colinux should, emm "must" start at
> 02:xx:xx:xx:xx
> to have it indicated as "locally administered address".
>
> IOW:
> (only)the high nipples
> x2:
> x6:
> xA:
> xE:
> would be OK!

looks right to me, any of those nibbles will be LAA and therefore you
don't need to worry about conflicts with existing cards (of course, if
someone else on your LAN segment is also making up MAC address...)

>
>
>
> Question:
> Why do i want to set the non-OUI bit?
> Answer:
> As that bit is never set in a Organizationally Unique Identifier (OUI)
> you can be absoletely sure never ever to interfere with any official assigned
> MAC addresess, even been assigned in future.
>
> Or?
>
>
>
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