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I use DHCP reservation rather than static IP for convenience, and that relies on the MAC address of my computer.

I recently bridged my main adapter with my VirtualBox adapter. When things stopped working, I realized that the MAC address is now different. Is there some way to keep it the same every time I bridge or unbridge or do I need to reconfigure the router every time?

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up vote 7 down vote accepted

To change the MAC Address of a network adapter manually:

Open the Registry Editor:

Navigate to the folowing key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002BE10318}

Go through the numbered subkeys until you find one that matches your network adapter configuration. Modify the value named NetworkAddress to reflect the desired MAC address, but without hyphens/colons, if you want 00-B3-A0-03-00-1F, set the value to 00B3A003001F

Voila!

Reference: http://www.windowsreference.com/networking/how-to-change-mac-address-in-windows-registry/

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Good point jscott, let me clear this mess up –  Mathias R. Jessen Dec 31 '11 at 0:38
    
@jscott Better? :-) –  Mathias R. Jessen Dec 31 '11 at 0:47
    
Yes, much actually and +1. –  jscott Dec 31 '11 at 1:41
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