Is it possible to change an interface MAC address??

[Allen_Fambro]

Hello,

  Is it possible to change the physical MAC address of an interface on the gateway (Gaia R80.30 3200 appliance)??  Troubleshooting a DHCP assigned IP address for the interface and want to change the MAC to prove the issue is on the DHCP server.  I know I could just use a different interface as well but that only changes the last digit in the MAC.  I'd like to use a totally different MAC.

  I tried changing it below but it doesn't seem to stick.  Any assistance would be greatly appreciated.  Thanks.