Checking optical power of Huawei switches
You can check the optical power on Huawei switches using the display transceiver and display transceiver diagnosis interface commands to view TX and RX power levels and other module diagnostics.
Checking Optical Power
- Basic Interface Information
- Run the command:
display interface <interface-type> <interface-number>This shows the interface status, link state, and traffic statistics, which is a prerequisite for checking optical power (the link must be UP) .
- Run the command:
- Viewing Optical Module Details
- Use the command:
display transceiver [ interface <interface-type> <interface-number> | slot <slot-id> ] [ verbose ]This displays detailed information about the optical module, including TX power, RX power, wavelength, vendor, and module type .
- Use the command:
- Checking Digital Diagnostic Monitoring (DDM)
- Run:
display transceiver diagnosis interface <interface-type> <interface-number>This command provides TX power, RX power, voltage, bias current, and temperature of the optical module, allowing you to monitor real-time performance and detect abnormalities .
- Run:
- Interpreting TX/RX Power
- Typical TX/RX optical power ranges depend on module type (e.g., SFP, SFP+, 10G). For example, a 1000BASE-SX SFP may have:
- TX Power: -6.99 dBm to -2.22 dBm
- RX Power: -16.99 dBm to 0.00 dBm These thresholds are displayed in the
display transceiveroutput and help determine if the optical link is within normal operating range .
- Typical TX/RX optical power ranges depend on module type (e.g., SFP, SFP+, 10G). For example, a 1000BASE-SX SFP may have:
- Optional: Viewing All Interfaces
- If you are unsure of the interface number, run:
display interface briefThis lists all interfaces and their types, helping you identify the correct interface for optical power checks .
- If you are unsure of the interface number, run:
Tips
- Ensure the optical module is Huawei-certified to avoid compatibility issues and inaccurate readings .
- Use the
verboseoption to get more detailed diagnostic information. - Regularly monitor TX/RX power to detect fiber degradation, connector issues, or module faults early. By following these commands, you can effectively check and monitor the optical power on Huawei switches, ensuring proper link performance and troubleshooting potential optical issues.
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