Use an optical power meter to test the receive power of the port and check whether the optical fiber is disconnected. If not, replace the optical module. If the optical module is installed on a GE port, run the display interfaceGigabitEthernet x/x/x command to view port information when the optical module is inserted, including the rate and wavelength. (Index=, EntityPhysicalIndex=, PhysicalName=" ", EntityTrapFaultID=, EnProblem: All optical ports cannot be connected, and the indicator lights are not on. Solution: To solve this problem, you can follow these steps: Check if the fiber and optical modules are compatible. Config log : As the port is disconnected from the application server or other devices.