Hello sjose,
please consult the latest dts for correct physical interface names (ifname):
https://github.com/MarvellEmbeddedProcessors/openwrt-kernel/blob/openwrt_17.02_release/arch/arm64/boot/dts/marvell/armada-3720-community.dts#L138
e.g. try replacing ‘eth0.2’ with ‘lan0’ and ‘eth0.3’ with ‘lan1’.
