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In Windows 7 I tried setting my MAC address by changing it via adapter properties (Locally Administered MAC Address), but ipconfig /all still shows the old address, even after rebooting. Any hints?

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2 Answers

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It's possible your card does not support changing your mac address.

You may also have more luck with a mac address changing utility.

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Are you sure that this is something that the network card would need to support? Unless you have a network accelerator card, aren't Ethernet headers are generated in-kernel? – Yang Jan 11 at 4:23
Interesting thought. I think after the driver calls NdisReadNetworkAddress() it can decide whether or not to accept the user-provided address before saving it in hardware registers. The burned-in one can definitely never be changed, but I was under the impression it was optional for a device to accept user-defined mac addresses. – BlueNovember Jan 11 at 11:25
I found a couple references, through a quick google, that show that this will not work in every situation... – bencnscp Jan 12 at 8:52
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http://devices.natetrue.com/macshift/ will succeed where others have failed. Though sometimes the MAC address is burned into the EEEPROM of the card.

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The page says it only works for XP.... – Yang Feb 2 at 15:41

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