HP StorageWorks 8/80 HP StorageWorks Fabric OS 6.2 administrator guide (5697-0 - Page 404

Physical chassis 1 IFL E Logical switch 1 E ISL (Default logical switch) Fabric ID 128 Logical switch 2 Fabric ID 1 Allows XISL use Logical ISL F E Logical switch 3 Fabric ID 15 E EX Logical switch 4 EX (Base switch) Fabric ID 8 E ISL IFL XISL Physical chassis 2 E Logical switch 5 F (Default logical switch) Fabric ID 128 Logical switch 6 F Fabric ID 1 Allows XISL use E Logical switch 7 Fabric ID 15 Logical switch 8 (Base switch) E Fabric ID 8 Figure 68 EX_Ports in a base switch Figure 69 shows a logical representation of the physical chassis and devices in Figure 68. As shown in Figure 69, Fabric 128 and Fabric 15 are edge fabrics connected to a backbone fabric. Fabric 1 is not connected to the backbone, so the device in Fabric 1 cannot communicate with any of the devices in the other fabrics. Edge fabric Fabric 128 SW5 SW1 E SW3 E Edge fabric Fabric 15 SW7 Backbone fabric Fabric 8 EX EX SW4 SW5 SW2 Fabric 1 SW6 Figure 69 Logical representation of EX_Ports in a base switch Backbone-to-edge routing with Virtual Fabrics Since the base switch does not allow F_Ports, you cannot have devices connected to the base switch. Even though F_Ports are not allowed in the base switch, they are allowed in an FC router in legacy mode (Fabric OS 6.1.x or earlier, or Fabric OS 6.2.0 or later with Virtual Fabrics disabled). If you connect an FC router in legacy mode to the base switch, backbone-to-edge routing is supported on that FC router. In Figure 68, no devices can be connected to the backbone fabric (Fabric 8) because base switches cannot have F_Ports. Figure 70 shows an FC router in legacy mode connected to a base switch. This FC router can have devices connected to it, and so you can have backbone-to-edge routing through this FC router. In this figure, Host A in the backbone fabric can communicate with device B in the edge fabric with FID 20; Host A cannot communicate with device C, however, because the base switches do not support backbone-to-edge routing. 402 Using the FC-FC routing service