MAC Address issue - OPi Zero H2+ (Armbian Debian Stretch)

Hi,

I am newbie in Debian. I have an inquiry regarding this matter.

I am having USB Wifi Dongle installed @ my OPi Zero H2+. It has built-in NIC (Eth0 & WLAN1) for the Debian Stretch.

I am using this PI for the FlightAware purposes.

1. I connect to Eth0 from the beginning to access SSH and update all required updates.

2. I use nmtui for the USB Wireless connected to the Wireless AP.

3. Reboot the PI.

4. Install my PiAware 3.5.3 as per their instruction.

5. All Installed without any issue.

I noticed that the MAC address of the USB Wireless Dongle is as follow:-

wlx7c8bca1f3ad1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.194  netmask 255.255.255.0  broadcast 192.168.1.255
        inet6 fe80::1b71:b02c:b5dd:22f9  prefixlen 64  scopeid 0x20<link>
        ether 7c:8b:ca:1f:3a:d1  txqueuelen 1000  (Ethernet)
        RX packets 10302  bytes 2304649 (2.1 MiB)
        RX errors 0  dropped 391  overruns 0  frame 0
        TX packets 3567  bytes 1221201 (1.1 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
 

Built-in Wifi:-

wlan1: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether 12:42:2f:e3:99:f8  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 ( 0.0 b )
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 ( 0.0 b )
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

On Board Ethernet:-

eth0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether 02:42:2f:e3:99:f8  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 ( 0.0 b )
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 ( 0.0 b )
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device interrupt 37
 

Now I want to set the wireless router to forward the port and I tried to put my USB Wifi Dongle  MAC Address "7c:8b:ca:1f:3a:d1" but end up and it link/loop to the eth0 MAC Address "02:42:2f:e3:99:f8" at router.

What should I do to resolve this issue?

Thank you.

Regards,

SaiHou