HP StorageWorks 8/40 Brocade Fabric OS Administrator's Guide v6.3.0 (53-100133 - Page 440
Traffic Isolation Routing over FC routers
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18 Traffic Isolation Routing over FC routers Domain 1 8 1 9 3 Domain 3 9 14 12 15 16 FIGURE 52 = Dedicated Path = Ports in the TI zone Domain 2 Dedicated path is not the shortest path 7 6 5 Domain 4 NOTE For information about setting or displaying the FSPF cost of a path, see the linkCost and topologyShow commands in the Fabric OS Command Reference. Traffic Isolation Routing over FC routers This section describes how TI zones work with Fibre Channel routing (TI over FCR). See Chapter 21, "Using the FC-FC Routing Service," for information about FC routers, phantom switches, and the FC-FC Routing Service. Some VE_Port-based features, such as tape pipelining, require the request and corresponding response traffic to traverse the same VE_Port tunnel across the metaSAN. To ensure that the request and response traverse the same VE_Port tunnel, you must set up Traffic Isolation zones in the edge and backbone fabrics. • Set up a TI zone in an edge fabric to guarantee that traffic from a specific device in that edge fabric is routed through a particular EX_Port or VEX_Port. • Set up a TI zone in the backbone fabric to guarantee that traffic between two devices in different fabrics is routed through a particular ISL (VE_Ports or E_Ports) in the backbone. This combination of TI zones in the backbone and edge fabrics ensures that the traffic between devices in different fabrics traverses the same VE_Port tunnel in a backbone fabric. Figure 53 shows how three TI zones form a dedicated path between devices in different edge fabrics. The backbone fabric can contain one or more FC routers. 398 Fabric OS Administrator's Guide 53-1001336-01
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