I've connected a 10Gb ethernet to my iMac via the SanLink3 T1 and the system is recognizing the connection via the Thunderbolt slot (in my Network settings) but I no longer have any connection to my server. If I bypass the SanLink3 T1, the computer connects to the server without any issues.
I have downloaded the latest drivers and upgraded my O.S. to Mojave.
There is something I'm missing but I'm not sure what it is.