HP StorageWorks 8/80 HP StorageWorks Fabric OS 6.2 administrator guide (5697-0 - Page 176

Before enabling Virtual Fabrics Physical chassis P0 P3 P6 P9 P1 P4 P7 P2 P5 P8 After enabling Virtual Fabrics Physical chassis Default logical switch P0 P3 P6 P9 P1 P4 P7 P2 P5 P8 Figure 8 Switch before and after enabling Virtual Fabrics After you enable Virtual Fabrics, you can create up to eight Logical Switches, depending on the switch model. Figure 9 shows a Virtual Fabrics-enabled switch before and after it is divided into Logical Switches. Before you create Logical Switches, the chassis appears as a single switch (default Logical Switch). After you create Logical Switches, the chassis appears as multiple independent Logical Switches. All of the ports continue to belong to the default Logical Switch until you explicitly move them to other Logical Switches. The default Logical Switch always exists. You can add and delete other Logical Switches, but you cannot delete the default Logical Switch unless you disable Virtual Fabrics. Before logical switch creation After logical switch creation Physical chassis Default logical switch P0 P3 P6 P9 P1 P4 P7 P2 P5 P8 Logical switch 1 (Default logical switch) P0 P2 P4 P6 P8 P1 P3 P5 P7 P9 Logical switch 2 Logical switch 3 Logical switch 4 Figure 9 Switch before and after creating Logical Switches Logical Switches and fabric IDs When you create a Logical Switch, you must assign it a fabric ID (FID). The fabric ID uniquely identifies each Logical Switch within a chassis and indicates to which fabric the Logical Switch belongs. You cannot define multiple Logical Switches with the same fabric ID within the chassis. In Figure 10 on page 175, Logical Switches 2, 3, 4, and 5 are assigned FIDs of 1, 15, 8, and 20, respectively. These Logical Switches belong to different fabrics, even though they are in the same physical chassis. For example, you could not assign Logical Switch 5 a fabric ID of 15, because Logical Switch 3 is 174 Managing virtual fabrics