HP StorageWorks 8/80 HP StorageWorks Fabric OS 6.2 administrator guide (5697-0 - Page 375
HP StorageWorks 8/80 - SAN Switch Manual
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connected from that router to the edge fabric. Another FC router connected to the same edge fabric projects a different front phantom domain. The second level of phantom domains is known as a translate phantom domain, also referred to as translate domain or xlate domain. The translate phantom domain is a router virtual domain that represents an entire fabric. Device connectivity can be achieved from one fabric to another-over the backbone or edge fabric through this virtual domain-without merging the two fabrics. The EX_Ports present translate phantom domains in edge fabrics as being topologically behind the front domains; if the translate phantom domain is in a backbone fabric, it is topologically present behind the FC router because there is no front domain in a backbone fabric. If an FC router is attached to an edge fabric using an EX_Port, it creates xlate domains in the fabric corresponding to the imported edge fabrics with active LSANs defined. If you import devices into the backbone fabric, an xlate domain is created in the backbone device in addition to the one in the edge fabric. Figure 63 shows a sample physical topology. This figure shows four FC routers in a backbone fabric and four edge fabrics connected to the FC routers. Host Target 1 Target 2 Target 3 Fabric 1 E E E EX EX Fabric 2 E EX EX Fabric 3 E E Fabric 4 E EX EX EX FC router 1 FC router 2 FC router 3 Figure 63 Sample topology (physical topology) FC router 4 Figure 64 on page 374 shows a phantom topology for the physical topology shown in Figure 63. 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. Fabric OS 6.2 administrator guide 373