IOCP input for the configuration
RESOURCE PART=(LP1,LP2,LP3)
CHPID PCHID=100,PATH=30,TYPE=FC,SWITCH=21,SHARED
CHPID PCHID=101,PATH=31,TYPE=FC,SWITCH=21,SHARED
CHPID PCHID=120,PATH=32,TYPE=FC,SWITCH=22,SHARED
CNTLUNIT CUNUMBR=001,PATH=(30,31,32),LINK=(C0,21C0,21C0),UNIT=XXX,...
CNTLUNIT CUNUMBR=002,PATH=(31,32),LINK=(22C0,22C0),UNIT=XXX,... Note: In
this example, the switch numbers specified for the FICON® Directors match the switch addresses
assigned to the Directors through their switch control panels.
In this example, chpids 30, 31, and 32 are attached to control unit
001. Chpid 30 communicates only to control units attached to switch 21 so
it has used a 2-digit link address (C0) even though the switch is configured with the high integrity
attributes and supports 4-digit link addresses. Chpids 31 and 32
communicate to control units that are not connected to their entry switches so they must have
4-digit link addresses. The first two digits identify the switch address and the last two digits
identify the port address to which the control unit is attached. Link address 21C0 identifies port
C0 on the switch with switch address 21. Link address 22C0 identifies port C0 on the switch with
switch address 22. I/O for control unit 001 for chpid 32 flows through
both switches while chpid 31 uses only switch 21. I/O for control unit 002
for chpid 31 flows through both switches while
chpid 32 uses only switch 22.
Note: This example does not follow all
recommendations. For example, chpid 31 connects to switch 21 and uses
4-digit link addresses while chpid 30 also connects to switch 21 but uses
2-digit link addresses. When a 4-digit link address is specified for a channel path, ensure that all
channel paths connected to the same entry switch specify 4-digit link addresses so IOCP can perform
better checking of the switch configuration. See Defining FICON switch configurations for more information about cascading
switches and specifying link addresses for FC channel paths.