Analyzing Optical Attenuation in Huijue Switches

You can check optical attenuation on a Huawei switch by viewing the optical transceiver's received (Rx) and transmitted (Tx) power using the display transceiver and display transceiver diagnosis commands.Steps to Check Optical AttenuationAccess the Switch CLI Log in to the Huawei switch via console, SSH, or Telnet.Identify the Interface Determine the interface connected to the optical module. Use:CodeCopydisplay interface brief This shows all ports, their types, link status, and basic traffic statistics .View Optical Module Information To check detailed optical module parameters, including Tx and Rx power:CodeCopydisplay transceiver interface verbose Replace and with the actual port, e.g., xgigabitethernet0/0/2 .Check Diagnostic Data (DDM) For real-time monitoring of optical power and other parameters:CodeCopydisplay transceiver diagnosis interface This command provides digital diagnostic monitoring (DDM) information, including:Tx Power: Optical power transmitted by the moduleRx Power: Optical power received at the moduleTemperature, Voltage, and Current of the module Calculate Optical Attenuation Optical attenuation (loss) can be estimated as:CodeCopyAttenuation (dB) = Tx Power (dBm) - Rx Power (dBm) Compare the measured attenuation with the expected fiber link loss to determine if the link is within normal operating range .Troubleshooting TipsEnsure the fiber type matches the module (single-mode vs. multi-mode).Avoid using non-Huawei-certified modules, as they may report incorrect power or cause interface issues .If Rx power is too low or too high, check fiber connectors, patch cords, and any inline attenuators . By following these steps, you can effectively monitor optical attenuation and ensure your Huawei switch's fiber links are operating correctly.