A–TroubleshootingTroubleshooting with a Diagnostic Port (D_Port)103BK3254601-00 CWhen a switch port is enabled as a D_Port, the QLogic 2700 Series Adapterautomatically runs the basic diagnostic test at both ends of the link. The Brocadeswitch then runs the following additional tests:Electric loopback testOptical loopback testQLogic recommends running D_Port tests on multipath configured boot fromSAN/fabric-assigned boot LUN. Running D_Port tests on single path boot fromSAN/fabric-assigned boot LUN may cause issues with OS stability in true bootfrom SAN environments.The following sections describe how to configure and run D_Port mode from theBrocade Fibre Channel 16 switch, and how to verify D_Port mode from theQConvergeConsole utilities:Configuring D_Port on a Brocade Fibre Channel 16G or 32G SwitchChecking D_Port Results from a Brocade Fibre Channel 16G or 32G SwitchVerifying D_Port Mode with QConvergeConsole GUIVerifying D_Port Mode with Interactive QConvergeConsole CLIVerifying D_Port Mode with Noninteractive QConvergeConsole CLIVerifying D_Port Mode with QConvergeConsole Plug-insConfiguring D_Port on a Brocade Fibre Channel 16G or 32GSwitchTo enable D_Port diagnostic mode:From the Brocade Fibre Channel 16G or 32G switch, issue the followingcommands:#portdisable#portcfgdport––enable#portenableThe D_Port test starts automatically.NOTEAll QLogic-branded 32Gbps SFP+ transceivers support the functionalityrequired to run D_Port tests. If you have a supported non-QLogic brandedtransceiver, ensure that it supports the optical wrap (OWrap) and electricalwrap (EWrap) capability that is required for D_Port.
