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Troubleshooting Guide
CloudEngine 16800, 12800, 12800E, 8800, 7800, 6800, and 5800 Series Switches
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An Optical Module Has Normal Transmit Power but Many Packets Are Dropped on the Interface Due to Bit Errors

An Optical Module Has Normal Transmit Power but Many Packets Are Dropped on the Interface Due to Bit Errors


  1. Use an optical power meter to measure the receive power of the optical module.
    Place the optical power meter close to the Rx end of a fiber to measure the receive power.
  2. If the receive power is below the normal range, check whether the fiber link is normal. This problem is usually caused by high connector loss or large bend radius of the fiber.
  3. Install another optical module on the interface and check whether the problem persists. If not, the previous optical module is faulty.
If no optical power meter is available, replace the optical module with another one of the same model and check whether the new optical module can work normally on the interface. Alternatively, run the display interface transceiver verbose command to check whether the transmit power and receive power of the optical module are consistent with the nominal values.
Updated: 2020-01-07

Document ID: EDOC1000060766

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