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Article Overview

Use the display transceiver and display interface commands to view optical module information, diagnostics, and power levels on Huawei switches.

Viewing Optical Module Information

To 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 <interface-type> <interface-number> Replace <interface-type> and <interface-number> 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 <interface-type> <interface-number>] 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 <interface-type> <interface-number> This command provides diagnostic parameters to help identify faults in the optical module .

Checking Interface Status

  • Interface 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 <interface-type> <interface-number> Shows interface rate, module type, link status, and traffic statistics, which can help troubleshoot connectivity issues .

Troubleshooting Tips

  • Verify 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.

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