How To Setup Customer Ethernet MAC Address

Check Ethernet MAC address

  • Check Ethernet MAC address via cmdline
khadas@Khadas:~$ cat /proc/cmdline
root=UUID=be7fd8e4-c575-444f-832f-00bf27631d9f rootfstype=ext4 rootflags=data=writeback rw ubootpart=NULL console=ttyS0,115200n8 console=tty0 no_console_suspend consoleblank=0 loglevel=7 logo=osd0,loaded,0x3d800000,1080p60hz vout=1080p60hz,enable hdmimode=1080p60hz  fsck.repair=yes net.ifnames=0 ddr_size= wol_enable=0 max_freq_a53=2208 max_freq_a73=2400 jtag=disable mac=c8:63:14:70:43:e4 androidboot.mac=c8:63:14:70:43:e4  fan=auto khadas_board=VIM3 hwver=VIM3.V12 coherent_pool=2M reboot_mode=normal imagetype=EMMC uboottype=vendor

You can see from the mac and androidboot.mac fields that the address is c8:63:14:70:43:e4

  • Check Ethernet MAC address via ifconfig command
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.118  netmask 255.255.255.0  broadcast 192.168.1.255
        inet6 fe80::17e7:5b1e:c841:a035  prefixlen 64  scopeid 0x20<link>
        ether c8:63:14:70:43:e4  txqueuelen 1000  (Ethernet)
        RX packets 210  bytes 20318 (20.3 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 236  bytes 23009 (23.0 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device interrupt 14

You can see from the ether fields that the address is c8:63:14:70:43:e4

Setup Customer Ethernet MAC Address

  • open /boot/env.txt file,
khadas@Khadas:~$ sudo vim /boot/env.txt
  • Modify custom_ethmac, customize it to the MAC address you want, the format is xx:xx:xx:xx:xx:xx, for example, c8:63:14:70:43:e6,
custom_ethmac=c8:63:14:70:43:e6
  • Reboot to take effect
khadas@Khadas:~$ sync
khadas@Khadas:~$ sudo reboot

Confirm whether the modification is effective

  • Check Ethernet MAC address via cmdline
cat /proc/cmdline
root=UUID=be7fd8e4-c575-444f-832f-00bf27631d9f rootfstype=ext4 rootflags=data=writeback rw ubootpart=NULL console=ttyS0,115200n8 console=tty0 no_console_suspend consoleblank=0 loglevel=7 logo=osd0,loaded,0x3d800000,1080p60hz vout=1080p60hz,enable hdmimode=1080p60hz  fsck.repair=yes net.ifnames=0 ddr_size= wol_enable=0 max_freq_a53=2208 max_freq_a73=2400 jtag=disable mac=c8:63:14:70:43:e6 androidboot.mac=c8:63:14:70:43:e6  fan=auto khadas_board=VIM3 hwver=VIM3.V12 coherent_pool=2M reboot_mode=normal imagetype=EMMC uboottype=vendor
  • Check Ethernet MAC address via ifconfig command
khadas@Khadas:~$ ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.120  netmask 255.255.255.0  broadcast 192.168.1.255
        inet6 fe80::17e7:5b1e:c841:a035  prefixlen 64  scopeid 0x20<link>
        ether c8:63:14:70:43:e6  txqueuelen 1000  (Ethernet)
        RX packets 100  bytes 10737 (10.7 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 151  bytes 16279 (16.2 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device interrupt 14

note:

  1. If there is no custom_ethmac field in boot/env.txt, you can add it at the end.
  2. The custom Ethernet must comply with the rules. If your custom URL does not comply with the rules, when you view it in the ifconfig command, it will display a result that is different from your custom address.