Fabric OS Administrator’s Guide 463
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Fibre Channel routing concepts 21
FIGURE 72 Sample topology (physical topology)
Figure 73 shows a phantom topology for the physical topology shown in Figure 72. In this figure,
the dashed lines and shapes represent the phantom topology from the perspective of Fabric 1.
Fabrics 2 and 3 also see phantom topologies, but they are not shown in this example. In this figure,
note the following:
Front domain 1 and Front domain 2 are front domains for EX_Ports connecting to Fabric 1.
There is one front domain for each FC router that is connected to Fabric 1.
Xlate domain 1 and Xlate domain 2 represent Fabrics 2 and 3, respectively. No xlate domain is
created for Fabric 4 because there are no LSAN devices in Fabric 4.
Target 1’, Target 2’, and Target 3’ are proxy devices for Target 1, Target 2, and Target 3,
respectively.
FIGURE 73 EX_Port phantom switch topology
Fabric 1 Fabric 2 Fabric 3 Fabric 4
Host Target 1 Target 2 Target 3
FC router 1 FC router 4FC router 3FC router 2
EX
E
EX
EX
EX
EX
EX
EX
E
E
E
E
E
E
Fabric 1
Target 1' Target 3'Target 2'
Front domain 1
(FC router 1)
Front domain 2
(FC router 2)
Xlate domain 1
(Fabric 2)
Xlate domain 2
(Fabric 3)
Host 1