Solution: Check whether the working parameters, interface information and receiving and sending of the optical module are normal, and then check the optical fiber jumper, or try to replace the optical fiber jumper and optical module. The optical module is not a Huawei-certified optical module. FCS and CRC errors occur on the port. Check whether the rates, duplex modes, and negotiation modes. Customers in the use of optical modules will more or less encounter a variety of failure problems, such as optical module model selection is correct, the use of jumper is correct and some common problems, customers have the ability to judge and have a clear solution, but for some of the use of. Based on typical issues encountered with optical modules in daily switch applications, this document summarizes basic troubleshooting steps for resolving common faults: 1. Cause 2: The type of optical jumper used does not match the optical. Have you ever experienced an unexpected network outage due to the failure of an SFP/SFP+ optical transceiver? 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. Wavelength: Meraki SFP's use 850nm, 1310nm, and 1550nm 100 Mbit/s SFP: Not supported by any Meraki device 1 Gbit/s SFP and 10 Gbit/s SFP+ supported models can be found.