Cherry PUMA SOM-RK3399-Q7 User Manual page 31

To set your own Universally Administered Address, you overwrite the U-Boot environment variable ethaddr. On
the U-Boot prompt, with XX:XX:XX:XX:XX:XX replaced by your MAC address:
setenv ethaddr XX:XX:XX:XX:XX:XX
saveenv
The MAC address can be queried from the U-Boot prompt using:
printenv ethaddr
To reset the MAC address to the default value, run:
env delete ethaddr
saveenv
RK3399-Q7 User Manual v1.6
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