u-boot/net/Kconfig

#
# Network configuration
#

menuconfig NET
	bool "Networking support"

if NET

config NET_RANDOM_ETHADDR
	bool "Random ethaddr if unset"
	select LIB_RAND
	help
	  Selecting this will allow the Ethernet interface to function
	  even when the ethaddr variable for that interface is unset.
	  A new MAC address will be generated on every boot and it will
	  not be added to the environment.

endif   # if NET