HP StorageWorks Fabric OS 6.1.x administrator guide (5697-0234, November 2009)

Fabric OS 6.1.x administrator guide 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.
Figure 26 Dedicated path (shortest path)
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.
Figure 27 Dedicated path (but not the shortest path)
General rules for TI zones
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.
7
12
3
14
15
16
Domain 1 Domain 3
Domain 4
Domain 2
8
19
6
9
5
= Dedicated Path
= Ports in the TI zone
7
12
3
14
15
16
Domain 1 Domain 3
Domain 4
Domain 2
8
19
6
9
5
= Dedicated Path
= Ports in the TI zone