The interface which shows as "No link" should not be port shielded with any of the other interface,it should be either unassigned or assigned static IP address. Step 2: Try to connect the computers using different cables and also try to connect different machines directly to the Sonicwall without any switch in between the SonicWall and the computers.
Iii) If Link speed shows up as "No link " follow the next step. Ii) If the LED light is active check the status of the link in Network | Interface | Link Status shows up the Link speed. I) Connect a computer directly to the interface and check if the activity of LED light is active. Step 4: Check if the port has been enabled. Step 2: Try to connect using different cables and try connecting different device to the interface. Step 1: Check the activity of Link LED's of the corresponding interface. Status of the interface shows up as "No Link" even though it is connected physically to any device.