You can run the set device port-config-mode enable command to change the working mode of SFP28 Ethernet optical ports on the device panel and change the working mode of QSFP28 Ethernet optical ports or split QSFP28 Ethernet optical ports. On an optical network, a sender needs to convert electrical signals into optical signals before sending them to a receiver, and the receiver needs to convert received optical signals into electrical signals. Solution: To solve this problem, you can follow these steps: Check if the fiber and optical modules are compatible. This. HUAWEI TECHNOLOGIES CO. Copyright © Huawei Technologies Co. All other trademarks and trade names mentioned in this document are the property of their respective holders. The purchased products, services and features are stipulated by the contract made between. "Campus Networks Typical Configuration Examples" provides typical campus network networking modes and a variety of deployment examples.