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I've tried to change MAC address on a notebook Toshiba Satellite A200-14E Windows Vista without success. I've tried to change it via Network settings - Adapter settings. I've set Network address property for ethernet adapter, but ipconfig /all still shows another address even after reboot.

Could someone please tell me what am I doing wrong?

Thanks in advance!

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migrated from serverfault.com Feb 7 '11 at 12:21

This question came from our site for professional system and network administrators.

    
How are you trying to change the MAC and are you sure this is what you are trying to do, not the IP? Network address says to me it's the IP not the MAC. –  tombull89 Feb 7 '11 at 12:35
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@tombull89: You missed the Adapter settings part. Most NIC drivers offer a list of tunable settings, including the hardware address, in the property page of the device itself. –  grawity Feb 7 '11 at 12:47
    
@Andrey: Have you entered a valid address? AFAIK, any separators such as - or : are not allowed there. –  grawity Feb 7 '11 at 12:48
    
No, there is no - and : in the address. –  Andrey Feb 7 '11 at 13:31
    
@grawity, indeed I did. Thanks for pointing that out. –  tombull89 Feb 7 '11 at 13:49

2 Answers 2

Not every NIC does support changing the MAC. In theory, it should be immutable and worldwide unique. Why do you want to do it in the first place?

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The address can be changed as long as the software (NIC driver) generates the Ethernet frames (which I believe it does on today's PCs; not sure). –  grawity Feb 7 '11 at 12:41
    
As for "in theory"... It remains theory way too often. –  grawity Feb 7 '11 at 12:51
    
Ah this was to be expected, I guess, especially when NIC's got crappy mass products. This appears to be the only "legal" reason for me though to change your NIC's mac, with only shady "get around access controls" applications left otherwise. –  SvW Feb 7 '11 at 12:56
    
I want to connect this notebook to the internet but internet account is registered to another MAC. –  Andrey Feb 7 '11 at 13:31

I recommend you look up your wireless NIC. On google. My wireless NIC requres a certain formula to get it to work with a MAC address swap:

0a:23:xx:xx:xx:xx

yours may also. Just google something like:

"XXXXXX MAC address change"

or something of the sort.

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