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AR Router Troubleshooting Guide

This Product Documentation provides guidance for maintaining AR Enterprise Router, covering common information collection and fault diagnostic commands, typical fault troubleshooting guide, and troubleshooting.
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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Replacing an Optical Module

Replacing an Optical Module


Invisible laser beams will cause eye damage. When replacing optical modules, do not look into bores of optical modules or connectors of optical fibers without eye protection.

  • A router must use Huawei-certified optical modules. Non-Huawei-certified optical modules cannot ensure transmission reliability and may affect service stability. Huawei is not responsible for any problem caused by the use of non-Huawei-certified optical modules and will not fix such problems.
  • Replacing an optical module interrupts service transmission on the corresponding interface. Therefore, replace an optical module only when you confirm that the optical module has failed.
  • Optical modules are hot swappable, and you do not need to power off the switch when replacing optical modules.
  • Do not insert an optical module reversely. If an optical module cannot be completely inserted into an optical interface, do not force it into the interface. Turn the optical module over and try again.
  • Install or remove optical fibers carefully to avoid damages to fiber connectors.
  • After removing the optical fibers from an optical module, cover the fiber connectors with dust caps. Place the optical fibers in an appropriate place to prevent them from swinging.


  • ESD wrist strap
  • Spare optical module
  • Dust caps
  • Optical port dust plug


  1. Wear an ESD wrist strap. Ensure that the ESD wrist strap is grounded and in a close contact with your wrist.
  2. Remove the optical fibers on the optical module.

    Mark the positions of the Tx and Rx optical fibers on the bores of the optical module, and then remove the optical fibers.

  3. Cover the removed optical fibers with dust caps.
  4. Remove the optical module.
    1. Rotate the handle of the optical module down.

    2. Pull the handle of the optical module and press the router panel with your thumb to remove the optical module.

  5. Insert a new optical module into the optical interface until the optical module is secured in the optical interface.
  6. Connect the Tx and Rx optical fibers to the marked positions.
  7. Check the LINK indicator on the optical interface. If the LINK indicator turns green, the new optical module works normally.
Updated: 2019-05-10

Document ID: EDOC1000079719

Views: 452878

Downloads: 4311

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