I tried the current Armbian images for RockPi E and found that eth0 (1GBit) is not working. I tried both Sid and Lunar Armbian flavours. Both with the same result.
I tried the Armbian images with the older V1.2 board version and everything works well. I guess the problem is related to the new RTL8211F chip.
In dmesg I can find the following errors:
mdio_bus stmmac-0: MDIO device at address 1 is missing.
rk_gmac-dwmac ff540000.ethernet end0: no phy found
rk_gmac-dwmac ff540000.ethernet end0: __stmmac_open: Cannot attach to PHY (error: -19)
I hope that somebody can help me.