SECURING FIBRE CHANNEL FABRICS - Brocade

Fibre Channel BasicsType Category Name DescriptionM_Port Switch Mirrored port Switch port that mirrors the datagoing through another portU_Port Switch Universal port Switch port with no devicesconnected to it; will becomean E_Port, F_Port, FL_Port, orEX_PortEX_Port Router Extended routeportSwitch port on a routerconnecting to the E_Port ona switch, forming an inter-fabriclink (IFL)D_Port Switch Diagnostic port Used for running link-leveldiagnostics between twoswitchesBlade serverN_PortFC initiatorsFC targetsF_Port E_Port E_Port F_PortN_PortE_PortFC switchISLFC switchFL_PortEX_PortNL_PortDisk arrayEX_PortUnusedU_PortFC looptargetFC director orbackbone withrouting capabilitiesIFLE_PortFC switchFC-ALtape driveFigure 4. FC devices and port link typesTargets and initiators are identified by a unique 8-byte address calleda World Wide Name (WWN), which is equivalent to an Ethernet MAC(Media Access Control) address. There are two types of WWNs:• A node WWN (nWWN) refers to the actual node or device or host• A port WWN (pWWN) refers to an actual port on an HBASecuring Fibre Channel Fabrics 27