Switch#conf t Switch(config)#service unsupported-transceiver Warning: When Cisco determines that a fault or defect can be traced to the use of third-party transceivers installedby acustomer or reseller, then, at Cisco's discretion, Cisco may withhold support under warranty or a Cisco support program. In the course of providing support for a Cisco networking product Cisco may require that the end user install Cisco transceivers if Cisco determines that removing third-party parts will assist Cisco in diagnosing the cause of a support issue. Switch(config)#no errdisable detect cause gbic-invalid Switch(config)#exit