Specifications

26 Getting Started with the McDATA Intrepid FICON Director
While the Switch ID in the CHPID statement is a logical switch number and defines the entry
point to the fabric, the link address in the CNTLUNIT statement points to the exit port of the
fabric.
In a switched point-to-point configuration shown in Figure 3-4, the logical switch number is
used in IOCP to define the entry point to the fabric. This is done using the SWITCH keyword.
For the exit port, a 1-byte destination link address value must be defined with the LINK
keyword. This value is the FICON Director port address of the physical port that the CU is
attached to.
Figure 3-4 Sample IOCP coding for switched point-to-point configuration
For a cascaded switch configuration refer to Figure 3-5 for the relation between Switch IDs
and link address definitions in the IOCDS, and the switch address settings in the FICON
Director. For the exit port, you must define a 2-byte link address value (destination switch
address and port address) in the LINK keyword.
Note: These rules should be followed not only for a cascaded FICON Director
configuration, but also for a switched-point-to-point configuration. If any single switch is to
be merged into a fabric in the future, there will be no need to change the switch address
(Domain ID) setting, which is a disruptive action.
Important: It is possible to define a 2-byte link address (switch address and port address).
However, the FICON Director must have the Fabric Binding and Insistent Domain ID
feature installed and configured. Refer to 3.5, “Binding and Insistent Domain ID” on
page 28 for more details.
Also, once a 2-byte link address is defined to a channel path, all link addresses defined to
be accessed from that same channel path must be 2-byte link addresses.
Sample FICON IOCP CU 8000-8700
ID ( no change in ID statement for FICON )
RESOURCE PARTITION=((A8,1),(A9,2),(A10,3))
CHPID PATH=(5E),SHARED,TYPE=FC,SWITCH=62
CHPID PATH=(5F),SHARED,TYPE=FC,SWITCH=62
CHPID PATH=(60),SHARED,TYPE=FC,SWITCH=62
CHPID PATH=(61),SHARED,TYPE=FC,SWITCH=62
CNTLUNIT CUNUMBR=8000,PATH=(5E,5F,60,61),
UNITADD=((00,256)),LINK=(0A,0E,12,16),
CUADD=0,UNIT=2105
CNTLUNIT CUNUMBR=8100,PATH=(5E,5F,60,61),
UNITADD=((00,256)),LINK=(0A,0E,12,16),
CUADD=1,UNIT=2105
*
*
CNTLUNIT CUNUMBR=8700,PATH=(5E,5F,60,61),
UNITADD=((00,256)),LINK=(0A,0E,12,16),
CUADD=7,UNIT=2105
IODEVICE
(no change for FICON)
Devices
2700-27xx
CU 2700 LCU-7
Devices
2100-21xx
CU 2100 LCU-1
CHPIDs
5E,5F,60,61
Output Ports
0A,0E,12,16
Devices
8000-80xx
CU 8000 LCU-0
A8-1 A9-2 A10-3
zSeries
FICON
Switch ID 62
Switch @ 62
Switch keyword
Logical switch number or
Entry switch ID
Link Keyword
1 byte
destination port address
(one for each switched path)