Problem wiht ethernet in NSA310 Linux Kernel 4.11.3 Kirkwood (1 reply)

Hello I made rootfs Debian 9.0 with debootstrap system boots everything works but not working ethernet = (is there any manual how to proceed with these devices? to get working ethernet

NSA310
U-boot : 2016.05 U-Boot Kirkwood
Kernel : Linux Kernel 4.11.3 Kirkwood