openwrt/target/linux/gemini/base-files/etc/preinit.arch

CONFIG_PARTITION="$(grep "VCTL" /proc/mtd | cut -d: -f1)"
MAC1="$(strings /dev/$CONFIG_PARTITION |grep MAC|cut -d: -f2|cut -c3-14|sed -e 's,\(..\),:\1,g' -e 's,^:,,')"
MAC2="$(strings /dev/$CONFIG_PARTITION |grep MAC|cut -d: -f8|cut -c3-14|sed -e 's,\(..\),:\1,g' -e 's,^:,,')"

ifconfig eth0 hw ether $MAC1 2>/dev/null
ifconfig eth1 hw ether $MAC2 2>/dev/null