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Physical Planning Considerations
5
Configure Allow/Prohibit Matrix - Active Dialog Box
Figure 5-4
To access the dialog box, ensure the FICON management style is
enabled for the director or switch, then select the Allow/Prohibit and
Active options from the Element Manager application's Configure
menu.
Figure 5-4
shows that port 1 (logical port address 05) is prohibited
from communicating with port 6 (logical port address 0A), port 7
(logical port address 0B), and port 8 (logical port address 0C).
When implementing an array that prohibits E_Port connectivity, be
aware that ISLs can be configured as unavailable to attached devices,
causing complex routing problems that can be difficult to fault isolate
and be incorrectly diagnosed as issues associated with the devices.
As an example of such a problem, refer to the simple two-director
fabric illustrated in
Figure
5-5. As shown in the figure, ISL 1 connects
Director A and Director B through logical port addresses 09 and 1A.
ISL 2 connects the directors through logical port addresses 0A
and 1B. A source server attaches to Director A through logical port
address 05. Two destination devices attach to Director B through
logical port addresses 2C and 2D.
Physical Planning Considerations
5-21
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