2 of my lan ports have stopped working. Superhub 3.
Have you tried swapping cables and devices between the ethernet ports ?
It may be a good idea to carry out a factory reset on the Hub …
Instructions for Hub 3
With the Hub Powered on use a paperclip or similar and do a pinhole reset.
Depress the pinhole switch for a timed 60 seconds then release.
DO NOT reboot the hub but allow it 5 to 10 minutes for it to boot itself up.
Once a steady white and no other lights are illuminated check your system again.