Brocade FICON Administrator's Guide v7.1.0 (53-1002753-01, March 2013)

64 FICON Administrator’s Guide
53-1002753-01
Traffic Isolation Zoning
5
FIGURE 16 Triangular topology with Enhanced TI Zones
Figure 16 shows the following TI Zone definitions for the triangular topology:
• Blue Zone includes the channel, ISL 1, and CU A.
• Green Zone includes the channel, ISL 2, and CU B.
• Red Zone includes the CU A, ISL 3, and CU B.
Using these definitions with failover disabled, the topology achieves the desired behavior. The
channel can reach CU A only over ISL 1 and CU B only over ISL 2. If either ISL should fail,
connectivity to the destination with the failed ISL is prevented because the exclusive path has
failed.
CU BCU A
ISL 3
ISL 1 ISL 2
Flow B
Flow C
Flow A
Channel