Networking Blog

After putting SFP in GBIC, Cisco 3750 reports:

%PM-4-ERR_DISABLE: gbic-invalid error detected on Gi0/2, putting Gi0/2 in err-disable state

This can happen if you are using third party SFP (non-cisco). The solution is to use undocumented command.
First enter command:

no errdisable detect cause gbic-invalid

and second command:

service unsupported-transceiver

There is no autocomplete for this command and no guarantee, but try it … It works for me on Cisco 3750.