I bought this device to use it as a router. I flashed it with nanopi-r1s-h5_sd_friendlycore-xenial_4.14_arm64_20191219.img from this source: http://dl.friendlyarm.com/nanopir1sh5. It uses kernel 4.14.111. As I need to use VLAN tagging on my LAN and for VDSL, I tried to configure a VLAN interface, bu...