HP StorageWorks Fabric OS 6.2 administrator guide (5697-0016, May 2009)

Fabric OS 6.2 administrator guide 177
Figure 13 Logical Switches in a single chassis belonging to separate fabrics
If you want to allow device sharing across fabrics in a Virtual Fabrics environment, see ”FC-FC routing and
Virtual Fabrics” on page 401.
Logical Fabric
A Logical Fabric is a fabric that contains at least one Logical Switch. The four fabrics shown in Figure 12 on
page 176 and Figure 13 are Logical Fabrics because they each have at least one Logical Switch in them.
You can connect Logical Switches to non-Virtual Fabric switches and to other Logical Switches.
You can connect Logical Switches to non-Virtual Fabric switches using an ISL, as shown in Figure 12 on
page 176.
You can connect Logical Switches to other Logical Switches in two ways:
• Using ISLs
• Using base switches and shared ISLs
Logical Fabric and ISLs
Figure 14 shows two physical chassis divided into Logical Switches. In this figure, ISLs are used to connect
the Logical Switches with fabric ID 1 and the Logical Switches with fabric ID 15. The Logical Switches with
fabric ID 8 are each connected to a non-Virtual Fabrics switch. The two Logical Switches and the
non-Virtual Fabrics switch are all in the same fabric, with fabric ID 8.
Figure 14 Logical Switches connected to other Logical Switches through physical ISLs
Figure 15 shows a logical representation of the configuration in Figure 14.
Fabric 15
Fabric 128
Fabric 8Fabric 1
H1
D1
D2
Switch 1
Switch 4
Switch 3
Switch 2
Logical switch 8
Fabric ID 8
P9
Logical switch 7
Fabric ID 15
P7
Logical switch 6
Fabric ID 1
P4
Physical chassis 2
P8
P6
P5
P3
P2
P1
Switch
Logical switch 4
Fabric ID 8
P6
Logical switch 3
Fabric ID 15
P5
P4
Logical switch 2
Fabric ID 1
P3
P2
Logical switch 1
(Default logical switch)
Fabric ID 128
P1
Physical chassis 1
Logical switch 5
(Default logical switch)
Fabric ID 128