How to change the speed of Huawei optical module port

You can change the speed of a Huawei optical module port by configuring auto-negotiation or manually setting the interface rate, ensuring both ends of the link match.

Steps to Configure Port Speed

1. Access the Interface View

• Log in to the Huawei switch and enter system view.
• Enter the Ethernet interface view for the port you want to configure. 2. Auto-Negotiation Mode
• By default, Huawei Ethernet interfaces work in auto-negotiation mode, where the port negotiates the speed with the connected device.
• To enable auto-negotiation, run:

  negotiation auto

• If the negotiated speed is not suitable, you can use the rate decrease auto-negotiation function to allow the interface to adjust to lower speeds compatible with the cable or module:

  set ethernet speed down-grade

• This ensures the interface can go Up even if the optical module or cable cannot support the maximum speed . 3. Non-Auto-Negotiation Mode
• To manually set the port speed, disable auto-negotiation:

  undo negotiation auto

• Then set the desired speed (for example, 1000 Mbit/s):

  speed 1000

• Ensure the remote interface is configured with the same speed and duplex mode to establish a successful link . 4. Fast-Up Mode for 10GE Optical Ports
• For 10GE optical interfaces, you can enable port mode fast-up to reduce the time it takes for the interface to go Up:

  port mode fast-up

• If the interface does not go Up after installing an optical module, either replace the module with a supported type (GE, 10GBASE-LR, 10GBASE-SR, 10GBASE-USR) or run:

  undo port mode fast-upcommit Then re-install the optical module . 5. Troubleshooting

• If the interface still does not go Up:
  • Remove and re-insert the optical module properly.
  • Verify that the optical module type, fiber type, and transmission distance meet specifications.
  • Use an optical power meter to check transmit and receive power levels and correct any abnormal attenuation .

Key Considerations

• Always ensure both ends of the link are configured with compatible speeds and duplex modes.
• Some optical modules may not support manual speed changes; check the switch and module specifications.
• Fast-up mode is only supported on certain 10GE optical interfaces and may require specific module types . By following these steps, you can successfully change the speed of a Huawei optical module port and ensure stable connectivity.