If you use unsupported SFP miniGBIC modules in Cisco devices, they might say, that it doesn’t like those. The interface will be on error disable then (err-disable). You can trick the device to support those unsupported devices by configuring the following:
- service unsupported-transceiver
- no errdisable detect cause gbic-invalid
To get rid of the err-disable message, simply do a shutdown/no shutdown sequence on that interface.