If possible, remove and reinstall the optical modules to check whether the fault is rectified. This article summarizes several solutions for using optical modules with switches and common problems encountered during usage, along with specific solutions. Huawei S5720-32P-EI-AC Switch II. How to Configure Optical Ports on Huawei S5720-32P-EI-AC Switch? Problem: All optical ports cannot be. Optical modules are widely used in switches, network interface cards (NICs), routers, and other communication devices. During use, reading optical module information helps understand its real-time operating status, enabling faster troubleshooting of link abnormalities. The following uses the. A Huawei S12708 switch experienced excessive fan spinning due to a faulty optical module. If the status shows “DOWN (Transceiver Type Mismatch)” when checked, it is.