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Traffic Isolation Zoning overview

12

 shows a fabric with a TI zone consisting of the following:

•

N_Ports:

“1,7”, “1,8”, “4,5”, and “4,6”

•

E_Ports:

“1,1”, “3,9”, “3,12”, and “4,7”

The dotted line indicates the dedicated path between the initiator in Domain 1 to the target in 
Domain 4.

FIGURE 34

Traffic Isolation zone creating a dedicated path through the fabric

In 

, 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. Refer to the Fabric OS Command 
Reference for details about the zone command.

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 either the dedicated or 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 

 on page 269 for additional 

information about using this feature. 

 compares the behavior of traffic when failover is enabled and disabled.

= Dedicated Path

Domain 1

Domain 3

Domain 4

1

9

9

2

10

4

= Ports in the TI zone

6

7

12

7

8

5