Re: [RFC PATCH 2/5] OMAP2+: add cpu id register to MAC address helper

From: Andy Green
Date: Fri Mar 18 2011 - 05:13:19 EST

On 03/18/2011 08:52 AM, Somebody in the thread at some point said:

+ /* mark it as not multicast and outside official 80211 MAC namespace */
+ mac[0] = (mac[0]& ~1) | 2;

so here lies the answer to my question "From where do you get the MAC" :)

Is there a guarantee that this MAC will work in all Ethernet setups?

Yeah it's in 80211 spec. You have to buy the spec, I can't point you to it directly, but here is the wikipedia article showing the structure

the random mac addresses generated by the kernel also use this scheme.

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