Two fiber optic modules in Huawei switch

Two fiber optic modules can be installed in a Huawei switch if they are compatible with the switch, use the correct fiber type, and are properly configured.Compatibility and Certification

Huawei switches require certified optical modules to ensure reliable transmission and service stability. Non-certified modules may cause data bus suspension, interface damage, or incorrect alarms, so always verify that the modules are Huawei-certified by checking the label, vendor name, or using the display transceiver command . Modules must match the interface speed; for example, a 10G module should not be used on a 1G port .

Fiber Type and Connection

Each optical module must be connected to the appropriate fiber type:

• Single-mode modules require single-mode fiber jumpers.
• Multimode modules require multimode fiber jumpers . Ensure that the optical connector type matches the module interface (e.g., LC, MPO) and that the fiber length suits the onsite cabling distance . Active optical cables (AOCs) can also be used for short-distance connections, replacing separate modules and fibers.

Configuration and Verification

After installing two modules:

1. Check the interface status using:

   display interface The link must show UP for normal operation .

2. Verify optical power and wavelength using:

   display transceiver interface verbose Ensure received and transmitted optical power are within normal ranges .

3. Confirm the port is not administratively down:

   display interface If it shows Administratively DOWN, enable the port.

Troubleshooting

• Perform a loopback test by connecting the fiber jumper to the same module to check for abnormalities .
• Avoid mixing single-mode and multimode fibers or modules.
• Ensure the modules' data rates match the interface to prevent connectivity issues.

Best Practices

• Install modules in adjacent ports only if the module size allows, as some non-standard modules may block neighboring interfaces .
• Use proper handling to avoid damaging connectors or fibers.
• Regularly monitor module status and traffic statistics to detect early signs of link degradation . By following these guidelines, two fiber optic modules can operate reliably on a Huawei switch, providing stable high-speed connections for network traffic.