Rock64: MAC Address is NOT Unique!

[PDXpi]

I have two Rock64 boards:

• One is Version 2 (4GB).
  
• One is Version 3 (4GB).
  

I've installed DietPi 6.34.3 on both boards. But I'm not able to connect both to the same broadcast domain at the same time because each has board has the same MAC address (86:e0:c0:ea:fa:a9)!

So I started digging around. And I found that...

I'm not able to find the first 3 octets (86:e0:c0) in any OUI databases. But the kernel ring buffer had these entries...

Code:

e1000e: Intel(R) PRO/1000 Network Driver
e1000e: Copyright(c) 1999 - 2015 Intel Corporation.
igb: Intel(R) Gigabit Ethernet Network Driver
igb: Copyright (c) 2007-2014 Intel Corporation.
igbvf: Intel(R) Gigabit Virtual Function Network Driver

...and...

Code:

RTL8211F Gigabit Ethernet stmmac-0:00: attached PHY driver [RTL8211F Gigabit Ethernet] (mii_bus:phy_addr=stmmac-0:00, irq=POLL)
RTL8211F Gigabit Ethernet stmmac-0:01: attached PHY driver [RTL8211F Gigabit Ethernet] (mii_bus:phy_addr=stmmac-0:01, irq=POLL)

To state the obvious:

• The first one appears to be related to an Intel PRO/1000 NIC.
  
• The second one appears to be a Realtek RTL8211 NIC.
  

I've read a few of Mark's posts on the subject. And I know/believe that...

1. When setting the MAC address: It should begin with 00:06:dc (i.e., The OUI of Syabas Technology [Amquest]). [ Reference ]
   
2. The accepted solution is to specify the MAC address manually in /etc/uEnv.txt using the macaddr= and/or the eth_addr= settings. I may be wrong - But I believe that these settings are now located in /boot/armbianEnv.txt. [ Reference ]
   

But specifying either one or both has no affect on the MAC address (86:e0:c0:ea:fa:a9)! e.g., Neither setting appears in the Kernel command-line:

Code:

dietpi@DietPi:~$ grep addr  /boot/armbianEnv.txt
ethaddr=00:06:dc:00:00:01
mac_addr=00:06:dc:00:00:01

dietpi@DietPi:~$ ip add | grep ether | awk '{ print $2 }'
86:e0:c0:ea:fa:a9

dietpi@DietPi:~$ cat /proc/cmdline
root=UUID=1542112e-4bd9-4f4a-9660-e9405c792736 rootwait rootfstype=ext4  consoleblank=0 loglevel=4 ubootpart=72193746-01 usb-storage.quirks=0x2537:0x1066:u,0x2537:0x1068:u 

dietpi@DietPi:~$ sudo dmesg | grep 'Kernel command line' | sed 's/\[.*\] //'
Kernel command line: root=UUID=1542112e-4bd9-4f4a-9660-e9405c792736 rootwait rootfstype=ext4  consoleblank=0 loglevel=4 ubootpart=72193746-01 usb-storage.quirks=0x2537:0x1066:u,0x2537:0x1068:u

1. Have I overlooked something besides the solution proposed on the Wiki page? i.e., WNpctool.exe
   
2. Is there a solution for folks that don't have MS Windows in their environment? e.g., Linux "purists"
   

TIA!