Dell PowerConnect Brocade 300 Fabric OS Administrator's Guide v7.1.0 - Page 346

12 Traffic Isolation Zoning overview Figure 31 shows a fabric with a TI zone consisting of the following: • N_Ports: • E_Ports: "1,7", "1,8", "4,5", and "4,6" "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. Domain 1 7 1 8 9 2 Domain 3 9 10 12 FIGURE 31 = Dedicated Path = Ports in the TI zone 7 6 5 4 Domain 4 Traffic Isolation zone creating a dedicated path through the fabric In Figure 31, 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 "Additional considerations when disabling failover" on page 347 for additional information about using this feature. Table 61 compares the behavior of traffic when failover is enabled and disabled. 346 Fabric OS Administrator's Guide 53-1002745-02