HP StorageWorks 8/80 HP StorageWorks Fabric OS 6.1.x administrator guide (5697 - Page 285

For example, in Figure 26, there is a dedicated path between Domain 1 and Domain 3, and another, non-dedicated, path that passes through Domain 2. Since the non-dedicated path is not the shortest path between Domain 1 and Domain 3, all traffic will use the dedicated path. Domain 1 8 1 9 3 Domain 3 9 14 12 15 = Dedicated Path 16 = Ports in the TI zone Domain 2 Figure 26 Dedicated path (shortest path) 7 6 5 Domain 4 In Figure 27, a dedicated path between Domain 1 and Domain 4 exists, but is not the shortest path. In this situation, if failover is enabled, the TI zone traffic uses the shortest path, even though the E_Ports are not in the TI zone. If failover is disabled, the TI zone traffic stops until the dedicated path is configured to be the shortest path. Domain 1 8 1 9 3 Domain 3 9 14 12 15 7 16 6 = Dedicated Path = Ports in the TI zone Domain 2 Figure 27 Dedicated path (but not the shortest path) General rules for TI zones 5 Domain 4 Note the following general rules for TI zones: • A given N_Port can be a member of only a single TI zone. This rule is enforced during zone creation or modification. • An E_Port can be a member of only a single TI zone. The same checking is done as described for N_Ports. If multiple E_Ports are configured that are on the lowest cost route to a domain, the various source ports for that zone are load-balanced across the specified E_Ports. Fabric OS 6.1.x administrator guide 285