For this reason, network administrators frequently need to check SFP modules using switch diagnostics, command-line tools, and optical monitoring data. Check the model of the faulty optical module. If it is not a Huawei-certified optical module, replace it with a Huawei-certified optical module. If the optical module is installed on a GE port, run the display interfaceGigabitEthernet x/x/x command to view port information when the optical module. In fiber optic networks, optical transceivers such as SFP, SFP+, QSFP28, and QSFP-DD play a vital role in converting electrical signals into optical signals and vice versa. These compact, hot-pluggable optical transceivers allow network engineers to flexibly select different transmission media. First, the transmission class of the optical module fault investigation and solution method This type of optical module failure mainly includes port not UP, port status is UP but do not receive or send messages, port frequently up or down and CRC error. Specific troubleshooting methods and. This module describes the command line interface (CLI) commands for configuring Optics on the Cisco 8000 Series Routers. Also, the supported keywords of a command vary based on the type of the optical module (coherent. Network outages can bring your ability to communicate and work to a halt, and your IT team will likely be frantically looking for a solution.