Logical Switches And Fabric Ids; Switch Before And After Enabling Virtual Fabrics; Switch Before And After Creating Logical Switches - HP A7533A - Brocade 4Gb SAN Switch Base Administrator's Manual

Before enabling Virtual Fabrics
Physical chassis
P0 P3 P6
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
Physical chassis
Default logical switch
P0 P3
P1 P4
P2 P5
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
P9
P6 P9
P7
P8
After enabling Virtual Fabrics
Physical chassis
Default logical switch
P0 P3 P6 P9
P1 P4 P7
P2 P5 P8
After logical switch creation
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