HP StorageWorks 8/80 HP StorageWorks Fabric OS 6.1.x administrator guide (5697 - Page 296

Figure 31 shows a metaSAN consisting of three edge fabrics connected through a 4/256 SAN Director or DC Director containing an FR4-18i with interfabric links. Host Target Target Edge fabric 1 E_Port Edge fabric 2 E_Port Edge fabric 3 E_Port Fibre Channel IFL switch IFL EX_Ports Long Distance IFL Fibre Channel switch 4/256 SAN Director with FR4-18i blade Figure 31 A metaSAN with interfabric links 26415a • Fabric ID (FID) Every EX_Port and VEX_Port uses the fabric ID (FID) to identify the fabric at the opposite end of the IFL. Configure all of the EX_Ports and VEX_Ports attached to the same edge fabric with the same FID. The FID for every edge fabric must be unique from each backbone fabric's perspective. Configure the FID for all of the EX_Ports and VEX_Ports from a backbone fabric to uniquely reference each of the attached edge fabrics. When two different backbones are connected to the same edge fabric, the backbone fabric IDs must be different but the edge fabric ID must be the same. Configuring the same backbone fabric ID for two backbones that are connected to the same edge is invalid. In this configuration, a RASLog message displays a warning about fabric ID overlap. Backbone fabrics which share connections to the same edge fabrics must have unique backbone fabric IDs. • Fibre channel router A switch running the FC-FC routing service. • Logical storage area networks (LSANs) An LSAN is defined by zones in two or more edge or backbone fabrics that contain the same devices. You can create LSANs that can span fabrics. These LSANs enable Fibre Channel zones to cross physical SAN boundaries without merging the fabrics while maintaining the access controls of zones (see Figure 32). An LSAN device can be a "physical device," meaning that it physically exists in the fabric, or it can be a proxy device. A proxy device represents a real device in a remote fabric. It has a name server entry and is assigned a valid port ID. When a proxy device is created in a fabric, the real device is considered to be imported into this fabric. The presence of a proxy device is required for interfabric device communication. 296 Using the FC-FC Routing Service