If the optical module is faulty, replace it with the spare part. If. Taking 10G SFP+/XFP optical module as an example, when the optical port of the optical module can not be UP when interconnecting with other devices, it can be troubleshooted from the following five aspects: The first step is to check whether the rate and duplex mode of the ports at both ends match. The following command shows how to enable the transmitting optical power alarm on port e8/1, set the maximum and minimum values, and clear the alarm thresholds. When troubleshooting potential causes: Determine if the downstream. 1) Unused protection: When an optical module is not in use, a dust cap must be installed to prevent dust from entering the port and causing poor contact. 2) Cleaning specification: Use special wiping paper or dust-free cotton swab to wipe the end face in the same direction.