Enable optical modules on the switch
In global configuration mode, execute the following commands in sequence to disable the switch's optical module validation and allow third-party modules: service unsupported-transceiver no errdisable detect cause gbic-invalid Note: These are hidden commands and cannot be. By default, Cisco switches perform authenticity validation on inserted optical modules. When the optical module on an interface is faulty, you can run the display commands to view information about the optical module.
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