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FiberPlex SFX Data Diode SFP not detected on Cisco Switches
Posted by Daniel Lizaola, Last modified by Danny Staub on 28 March 2025 11:26 AM
By default, Cisco devices only support official Cisco transceivers and will block third-party SFPs with an error message like:
%PHY-4-UNSUPPORTED_TRANSCEIVER: Unsupported transceiver found


To resolve it, just configure the following commands in the cisco switch:

service unsupported-transceiver
no errdisable detect cause gbic-invalid

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