How to check the optical ports on a Huawei switch

Use the display transceiver and display interface commands to view optical module information, diagnostics, and power levels on Huawei switches.Viewing Optical Module InformationTo check the optical port on a Huawei switch, you can use the following commands:Display all optical modules: display transceiver This command lists all optical ports and their module types, connector types, wavelengths, transfer distances, and vendor information .Display a specific optical port: display transceiver interface Replace and with the actual interface, e.g., GigabitEthernet 0/0/1. This shows detailed information for that port, including digital diagnostic monitoring (DMM) data, vendor, serial number, and manufacturing date .Verbose output for power and diagnostics: display transceiver [interface ] verbose This provides receive (RX) and transmit (TX) power levels, voltage, bias current, and alarm thresholds. If the current power is within the limits, the optical module is functioning correctly; otherwise, alarms indicate too high or too low optical power .Diagnostic check: display transceiver diagnosis interface This command provides diagnostic parameters to help identify faults in the optical module .Checking Interface StatusInterface overview: display interface brief Lists all interfaces with their link status (UP/DOWN), speed, and traffic statistics. A link must be UP for normal optical module operation .Detailed interface check: display interface Shows interface rate, module type, link status, and traffic statistics, which can help troubleshoot connectivity issues .Troubleshooting TipsVerify module certification: Always use Huawei-certified optical modules. Non-certified modules may not be recognized, can cause data bus errors, or damage the interface due to nonstandard sizes .Check optical power: Use the verbose command or an optical power meter to ensure RX and TX power are within the specified thresholds .Loopback testing: Form a loop on the port using an optical fiber to verify the port can go UP. For long-distance modules, use optical attenuators if necessary .Configuration check: Ensure auto-negotiation and other interface settings match the remote port configuration .Module replacement: If the module is faulty or non-certified, replace it with a Huawei-certified module. If issues persist, reboot the switch or check the software version . By following these commands and checks, you can effectively monitor, diagnose, and troubleshoot optical ports on Huawei switches, ensuring proper operation and network reliability.