SFP Issues:

FORCING A CISCO CATALYST SWITCH TO USE 3RD PARTY SFP MODULES:

service unsupported-transceiver
When entering the service unsupported-transceiver command, the switch will automatically throw a warning message as a last hope to prevent the usage of a 3rd party SFP.

Commands:

sh inventory
sh inter <Port> capabilities
show module

sh int <Port> transceiver calibrations


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