Huawei Switch Optical Port Power

Huawei switch optical port power can be monitored using the display transceiver commands to check TX (transmit) and RX (receive) power, ensuring it is within normal ranges for proper optical link operation.

Viewing Optical Power

To check the optical power of a specific port on Huawei switches, use the following commands:

• Display all optical modules: display transceiver This shows basic information for all optical ports, including module type, wavelength, and DDM support .
• Display a specific port with detailed diagnostics: display transceiver interface interface-type interface-number verbose This command provides TX power, RX power, voltage, bias current, and temperature for the optical module .
• Check for abnormal optical power: display transceiver diagnosis interface interface-type interface-number This command helps identify high or low transmit/receive power alarms and other module faults .

Typical TX/RX Power Ranges

• Gigabit SFP modules: TX power typically ranges from -9 dBm to -3 dBm, and RX power should be within the module's specified sensitivity range .
• 10G SFP+ modules: TX power usually ranges from -5 dBm to 0 dBm, with RX power depending on fiber type and distance .
• Power outside these ranges may trigger alarms such as hwOpticalInvalid or hwOpticalPowerAbnormal .

Troubleshooting Optical Power Issues

1. Check module compatibility: Ensure the optical module matches the switch port speed and fiber type (single-mode vs. multi-mode) to avoid abnormal power readings .
2. Inspect fiber connections: Clean connectors and verify proper insertion. Dirty or loose connectors can reduce RX power.
3. Avoid mixing module types: Using non-Huawei-certified modules may cause abnormal power, interface errors, or even hardware damage .
4. Loopback test: Connect the fiber jumper to the same module to verify if the port can transmit and receive normally .
5. Check port status: Use display interface xgigabitethernet0/0/2 to ensure the port is not administratively down .

Best Practices

• Always use Huawei-certified optical modules to ensure proper power levels and compatibility .
• Monitor optical power regularly using DDM to detect early degradation of fiber links.
• Configure combo ports carefully, as only one of the optical or electrical ports can operate at a time . By following these steps, you can effectively monitor and maintain optical port power on Huawei switches, ensuring stable and reliable network connectivity.