Brocade Fabric OS Administrators Guide (Supporting Fabric OS v7.3.0) - Manual (Page 342)

FIGURE 32 Traffic Isolation zone creating a dedicated path through the fabric
In this illustration, all traffic entering Domain 1 from N_Ports 7 and 8 is routed through E_Port 1.
Similarly, traffic entering Domain 3 from E_Port 9 is routed to E_Port 12, and traffic entering Domain 4
from E_Port 7 is routed to the devices through N_Ports 5 and 6. Traffic coming from other ports in
Domain 1 would not use E_Port 1, but would use E_Port 2 instead.
Use the zone command to create and manage TI zones.
TI zone failover
A TI zone can have failover enabled or disabled.
Disable failover if you want to guarantee that TI zone traffic uses only the dedicated path, and that no
other traffic can use the dedicated path.
Enable failover if you want traffic to have alternate routes if the dedicated path cannot be used, and if
you want other traffic to be able to use the dedicated path if the non-dedicated paths cannot be used.
ATTENTION
If failover is disabled, use care when planning your TI zones so that non-TI zone devices are not
isolated. If this feature is not used correctly, it can cause major fabric disruptions that are difficult to
resolve. See
Additional considerations when disabling failover on page 343 for additional information
about using this feature.
The following table compares the behavior of traffic when failover is enabled and disabled.
TI zone failover
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