SFP transceivers and MDS lab study

MDS1# show int fc1/1 transceiver fc1/1 sfp is present but not supported Name is FINISAR CORP. Manfacturer's part number is FTRJ8519P1BNL-MC This does not seem to be an issue. However I would not use unsupported GBIC's in production, that would not be a smart thing to do. On some Cisco products, the idprom information is read from the GBIC and if it doesn't match a supported part #/vendor, it disables the GBIC. This is the case for example on many Cisco Catalyst switches such as the 3750's. You can overcome this by disabling supported GBIC enforcement:

Switch(config)#service unsupported-transceiver Warning: When Cisco determines that a fault or defect can be traced tothe use of third-party transceivers installed by a customer or reseller,then, at Cisco's discretion, Cisco may withhold support under warranty ora Cisco support program. In the course of providing support for a Cisconetworking product Cisco may require that the end user install Ciscotransceivers if Cisco determines that removing third-party parts willassist Cisco in diagnosing the cause of a support issue.Switch(config)#no errdisable detect cause gbic-invalid Once again, really something only to be done in a lab environment. Getting your hands on expensive GBIC's can be tough, especially in a CCIE storage lab environment where you probably need at least 80-100 GBIC's to have a good lab going.