HP 1606 FICON Administrator's Guide v6.4.0 (53-1001771-01, June 2010) - Page 65

Flow B, Red zone includes the CU A, ISL 3, and CU B.

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Traffic Isolation Zoning 5 To get around the multiple-hop issue, use Enhanced TI Zoning to prohibit the connection between E_Ports on the directors. For this setup you must define a device in two zones with failover disabled. Figure 16 shows that the setup allows a source device to reach two separate destinations over exclusive, one-hop paths, while preventing the source device from taking the two-hop path in the event of a failure. Channel Flow A Flow B ISL 1 ISL 2 ISL 3 Flow C CU A CU B 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. FICON Administrator's Guide 53 53-1001771-01

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FICON Administrator’s Guide
53
53-1001771-01
Traffic Isolation Zoning
5
To get around the multiple-hop issue, use Enhanced TI Zoning to prohibit the connection between
E_Ports on the directors. For this setup you must define a device in two zones with failover
disabled.
Figure 16
shows that the setup allows a source device to reach two separate destinations
over exclusive, one-hop paths, while preventing the source device from taking the two-hop path in
the event of a failure.
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 B
CU A
ISL 3
ISL 1
ISL 2
Flow B
Flow C
Flow A
Channel