How to check the fiber optic cable in a switch
There's nothing to test the fiber directly, other than a separate fiber tester device like a light meter or an OTDR What is usually done is to compare the optical TX and RX levels on both sides, to ensure the signal is within range, if its within range you should be OK. Does anyone know any CLI commands to test the fibre cable from any of the two switches? (I know there is the command "test cable-diagnostics. Before delving into software diagnostics, it is essential to perform a physical inspection of the fiber optic cables and connectors. Optical module identification and status monitoring are essential daily tasks for network engineers maintaining Cisco switching systems.
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