Comments on: Force VMWare to Generate a new MAC Address

By: Randy

Randy — Fri, 11 Feb 2011 17:18:30 +0000

I screwed it up in exactly the way you described and your fix worked perfectly. You’d think that VMWare would recognize the duplicate MAC’s and give you the option to force a generated instead of just posting an entry to the log…

Thank you very much for the information.

Randy

By: rob

rob — Sun, 22 Aug 2010 09:52:18 +0000

Hi Phil,

Thanks for sharing this. It worked a treat.

regards,
rob

By: Tobias

Tobias — Wed, 17 Feb 2010 14:37:42 +0000

Thanks for sharing this. I made a linked clone (of a linked clone) with Workstation 7 and for some reason it did not generate new uids/macs.

Regards, Tobias

By: Phil Wiffen

Phil Wiffen — Fri, 29 Jan 2010 09:38:58 +0000

Try this….

Edit the .vmx file and locate the following generated MAC address:

Ethernet0.addressType =
and
Ethernet0.generatedAddress =

Change the value for ethernet0.addressType from “vpx” to “static”

Change ethernet0.GeneratedAddress to ethernet0.Address

Change the current MAC to a MAC address in the following range:
00:50:56:00:00:00-00:50:56:3F:FF:FF

I got the instructions from here: http://virtrix.blogspot.com/2007/04/vmware-configuring-static-mac-address.html

By: Paul Rowley

Paul Rowley — Fri, 29 Jan 2010 08:55:04 +0000

Hi Phil,

Found this article, however…..

What I need to do is assign a static mac address, is this possible in VMware player? and if so how?

Thanks,

Paul

By: Phil Wiffen

Phil Wiffen — Thu, 21 Jan 2010 09:32:20 +0000

atomsnine: From memory, if you move one of the VMs in the host’s filesystem, and then open it up in VMware Workstation it should ask you whether you moved it, or whether you copied it. If you say you copied it, it’ll make new a new UUID and hopefully a different MAC too!

By: Sebastian

Sebastian — Mon, 18 Jan 2010 16:12:40 +0000

Great solution, I found it very useful. Cheers

By: atomsnine

atomsnine — Mon, 11 Jan 2010 22:48:32 +0000

Hi Phil,

The procedure you detailed above works correctly. I shutdown the guest, delete the MAC and UUID info, save the change, restart and the entries are regenerated. My problem remains however – The entries generated are identical to the previous.

I have two vm’s that have identical MAC’s and UUID bios info.

As you eloquently stated – I am experiencing some network weirdness because of the duplicate MAC. Ideas?

By: Abelard

Abelard — Thu, 27 Aug 2009 19:06:51 +0000

Thanks, Phil, that was exactly what I needed!