Enabling the optical interface on Huawei switches

Huawei optical interfaces require proper module selection, medium type configuration, and interface attribute settings to ensure correct operation and connectivity.1. Preparing Optical Modules and FibersBefore configuring an optical interface, ensure that the optical module and fiber type are compatible with the switch port. Single-mode and multi-mode fibers must match the corresponding optical modules, and the module speed should not exceed the interface capability (e.g., do not use a 10G module on a 1G port) . For Huawei CloudEngine switches, only certified optical modules should be used to avoid misidentification or damage .2. Connecting and Verifying the InterfaceInsert the optical module into the switch port and connect the fiber.Use the command display interface [interface-type interface-number] to check the port status. If it shows Administratively DOWN, the port is shut down and must be enabled .For detailed optical parameters, run display transceiver interface [interface-type interface-number] verbose to check wavelength, received, and transmitted optical power .3. Configuring Medium TypeHuawei switches allow pre-configuration of the transmission medium type even before the module is installed. This ensures faster service deployment. If the installed medium differs from the pre-configured type, the installed medium takes priority. Forcing the medium type is possible but may damage the module if mismatched .4. Configuring PON Interfaces (EPON/GPON)For switches or routers acting as ONUs in a PON network:Configure the PON interface to auto-negotiate the working mode (EPON or GPON) based on the received optical signal .If switching modes after a successful negotiation, reset the PON board to trigger re-negotiation. Note that changing the working mode interrupts service .For EPON interfaces, compatibility mode can be configured using the epon compatibility dba command, followed by a device restart .5. Enabling and Committing ConfigurationEnter system view: system-viewEnter the optical interface view: interface [interface-type interface-number]Configure attributes such as speed, duplex, FEC, and medium type.Commit the configuration to activate the interface.Verify with display interface and display transceiver commands to ensure the interface is operational .6. Troubleshooting Common IssuesNo link or indicator lights off: Check fiber/module compatibility, perform a loopback test, and verify port status .Incorrect optical power: Use verbose transceiver display to check received/transmitted power and wavelength .Service interruption during mode change: Plan maintenance windows when changing PON interface modes . By following these steps, Huawei optical interfaces can be properly configured, verified, and maintained, ensuring reliable connectivity and optimal performance.

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Enabling the optical interface on Huawei switches