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VMware: The MAC Address entered is not in the valid range

After configuring a manual MAC address on a MAC based license server I received a error message:

The MAC Address entered is not in the valid range. Valid values are between 00:50:56:00:00:00 and 00:50:56:3F:FF:FF:FF

Error message:




Without additional setting in the .VMX config file you won’t be able to assign a static MAC address in the range your require. To disable mac address checking before boot add the following line in the .VMX file.

ethernetX.checkMACAddress = “false”




Re-upload the .VMX config to the datastore and add the virtual machine to the inventory:



Sander Daems is founder and author of this blog and working as a Lead (Sr.) Consultant by UNICA ICT Solutions. Sander has over 15 years experience in IT, primary focus: virtualization and modern worksplace.

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  1. June 9th, 2011  (Quote) at 06:06  (Quote) | #1


    If VM connected to dvSwitch, it doesn’t work.
    And I can’t find how it is possible with dvSwitch or Nexus.

  2. MarkM
    January 25th, 2012  (Quote) at 01:07  (Quote) | #2


    Hi Mikhail, did you find how to implement static MAC with dvswitch?

    It is easy with vswitch but with dvswitch not the same.

  3. Johan Timmer
    March 23rd, 2012  (Quote) at 23:06  (Quote) | #3

    Great one, this helped me a lot!

  1. at | #1
  2. at | #2