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Date:      Tue, 25 Jan 2011 09:03:05 +1000
From:      Da Rock <freebsd-questions@herveybayaustralia.com.au>
To:        freebsd-questions@freebsd.org
Subject:   Re: Changing the MAC address on a LAN adapter
Message-ID:  <4D3E0529.8090404@herveybayaustralia.com.au>
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 01/25/11 04:44, Fred wrote:
> Da Rock wrote:
>> On 01/25/11 01:14, Paul B Mahol wrote:
>>> On Sun, Jan 23, 2011 at 3:47 PM, John R. Levine<johnl@iecc.com>  wrote:
>>>>>> Is this a known problem?  As far as I know, it's supposed to work.
>>>>> How you change MAC address? With "ether" command?
>>>> # ifconfig em0 ether 01:17:a4:8f:04:5d
>>> Well, if it does not work it can be driver bug.
>>>
>>> In iwn case try to set MAC address of iwn before creating wlan or
>>> you will need to set same MAC on wlanX and iwn.
>> Actually I can confirm that. I use lagg for failover, and I remember 
>> now you have to set the 'real' interface to the MAC of the other lagg 
>> member, not a 'psuedo-device' or it won't work. Same principle 
>> applies here.
>>
>> HTH
>> _______________________________________________
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>>
>>
> 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.
>
> Best regards,
> Fred
Yes, but for lagg to work both adapters need the same MAC- otherwise 
routing wouldn't work properly (long story short).

BTW, my wifi is iwn and I have had no trouble.



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