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Date:      Mon, 24 Jan 2011 11:45:21 -0800
From:      Chuck Swiger <cswiger@mac.com>
To:        Fred <fred@blakemfg.com>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: Changing the MAC address on a LAN adapter
Message-ID:  <68D41D76-35A9-447F-BB6F-6822E3B05589@mac.com>
In-Reply-To: <4D3DC87E.1010400@blakemfg.com>
References:  <20110123023834.19098.qmail@joyce.lan> <AANLkTinB_CFrZN6oHGS3DA5TZnfafggc95MX=juTgKp=@mail.gmail.com> <alpine.BSF.2.00.1101230946080.93018@joyce.lan> <AANLkTi=S5FHNQwu7ZgavF_-TgckFW1AsiY8ZRUKMWawk@mail.gmail.com> <4D3D9CBC.7060700@herveybayaustralia.com.au> <4D3DC87E.1010400@blakemfg.com>

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On Jan 24, 2011, at 10:44 AM, Fred wrote:
> Ethernet MAC addresses are assigned by the manufacturer of the equipment.  Each unit gets a unique address which generally can't be changed and shouldn't be changed.  The manufacturer buys a block of addresses from the IEEE.

Yes, although folks can set the locally administered bit in the 6-byte MAC address instead of using globally administered addresses & vendor-assigned blocks from IEEE OUI...

Regards,
-- 
-Chuck




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