Not sure that this will address the Rockon issue, however it seems that your board is using Realtek hardware for the network device, which are not included in the Rockstor install at this time.
Based on this:
you can try to install them from the OpenSUSE repo using: zypper in kernel-firmware-realtek
or follow @Flox instructions further down in the thread to get the very latest ones, however that is a little bit more involved.