HP Brocade BladeSystem 4/12 HP StorageWorks Fabric OS 6.1.1 administrator guid - Page 313

Host Edge fabric 1 E_Port Target Edge fabric 2 E_Port Target Edge fabric 3 E_Port Fibre IFL Channel switch IFL EX_Ports Long Distance IFL Fibre Channel switch 4/256 SAN Director with FR4-18i blade Figure 37 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 interfabric link (IFL). The FID for every edge fabric must be unique from the perspective of each backbone fabric. • If EX_Ports and VEX_Ports are attached to the same edge fabric, they must be configured with the same FID. • If EX_Ports and VEX_Ports are attached to different edge fabrics, they must be configured with a unique FID for each edge fabric. If 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. NOTE: Backbone fabrics that share connections to the same edge fabrics must have unique backbone fabric IDs. • Fibre channel router A switch running the FC-FC routing service. See "Supported platforms" on page 311 for a list of platforms that can be FC routers. • 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 38). An LSAN device can be a physical device, meaning that it physically exists in the fabric, or it can be a proxy device. Fabric OS 6.1.x administrator guide 313