The switch s optical port is normal
If optical attenuation is normal but the link still fails, check the switch port settings: • Some switches use combo SFP/RJ45 ports, which require manual optical port configuration. When optical modules operate on a switch, it is usually necessary to read the module's internal information to understand its working status—such as connection status and real-time metrics like optical power and temperature. This document describes how to troubleshoot fiber optic interfaces by addressing some of the fiber optic module and cabling specifications. Enter the privileged EXEC mode by typing "enable" and providing the enable.
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