To replace an optical module on a Huawei switch, carefully remove the old module, ensure ESD protection, and install a compatible new module while maintaining fiber cleanliness and correct orientation.

Preparation and Safety

1. ESD Protection: Wear an ESD wrist strap or gloves and ensure proper grounding to prevent damage to sensitive optical modules .
2. Dust Plugs: Keep dust plugs on idle ports and cover fiber connectors when disconnected to prevent contamination .
3. Compatibility Check: Ensure the new optical module matches the old one in center wavelength, standard, and speed. Avoid mixing single-mode and multi-mode fibers or using modules with higher rates than the interface supports .

Removing the Old Optical Module

1. Disconnect Fibers: Remove optical fibers from the module and cover them with dust caps .
2. Labeling: Record fiber positions and label them clearly to ensure correct reconnection .
3. Module Removal: Rotate the handle of the module down, gently push, and pull the module out using the handle. Use tweezers if space is limited .
4. Wait Before Re-insertion: If replacing a copper transceiver, wait at least 2 seconds before inserting the new module to allow the port to reset .

Installing the New Optical Module

1. Orientation: Ensure the module is correctly oriented (gold fingers facing down if applicable) and gently push it into the port until it clicks .
2. Secure Fit: Verify the module is seated properly by gently pulling on it; it should not come out if installed correctly .
3. Reconnect Fibers: Attach the optical fibers to the labeled positions and remove dust caps .
4. Check Status: Observe the LINK indicator; a steady green light indicates normal operation .

Post-Replacement Verification

• Use commands like display interface xgigabitethernet0/0/2 or display transceiver interface xgigabitethernet0/0/2 verbose to check port status, optical power, and wavelength .
• If the LINK indicator is off on a dual-fiber port, swap the fibers to correct polarity .
• Confirm that the interface configuration remains correct, especially if the new module differs in type from the old one .

Additional Tips

• Never look directly into the optical module or fiber ends; laser radiation can cause eye damage .
• Use only Huawei-certified optical modules to ensure service stability .
• Keep the module and fiber connectors clean and free from dust during the replacement process . Following these steps ensures a safe and effective replacement of Huawei switch optical modules, maintaining network stability and preventing damage to sensitive components.