Visara FEP-4600 Planning Guide - Manual (Page 50)

Chapter 4. VTAM BSC-Attached 3270
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It should be noted that the FEP-4600 supports up to 32 devices for each CU
(CNTLUNIT) definition. These may be reallocated as needed in the FEP-4600
configuration to the downstream devices. For example, you could define a single Non-
SNA CU to have 32 devices, and assign each device to a separate downstream ATM
location, spread across multiple lines and multiple drops. For detailed configuration
information, see the FEP-4600 Installation and Configuration Guide. Currently the FEP-
4600 supports a total of 32 downstream devices per QBA card.
IOCDS Gen Requirements
Each BSC 3270 device (display and printer) that is to be supported by the FEP-4600
requires that a single subchannel address be assigned, to the host LPAR that owns the
resource. A single CNTLUNIT macro is used to define the collection of devices attached
to a single BSC cluster controller. An example ESCON gen might appear as follows:
RESOURCE PARTITION=((PROD1,1),(TEST,3))
CHPID PATH=(1E),TYPE=CNC,SWITCH=01,SHARED
CNTLUNIT CUNUMBR=1E00,PATH=1E,UNITADD=((00,32)),UNIT=3174,LINK=C5
IODEVICE CUNUMBR=1E00,ADDRESS=(1700,30)UNIT=3270-X,UNITADD=00,PARTITION=(PROD1)
IODEVICE CUNUMBR=1E00,ADDRESS=(171E,2)UNIT=3284,UNITADD=1E,PARTITION=(PROD1)
Note that you may require multiple IODEVICE macros to describe the attached devices,
since there are a number of device specific UNIT types.
An example IO gen for FICON would look very similar with two major differences. The
CHPID type for FICON is FC (TYPE=FC). UNIT=NOCHECK is required in place of the
UNIT=3174 for the CNTLUNIT definition since a 3174 is not a valid device type for the
FICON environment. The IODEVICE definitions could be the same as when done for
ESCON.
RESOURCE PARTITION=((PROD1,1),(TEST,3))
CHPID PATH=(1E),TYPE=FC,SWITCH=01,SHARED,PCHID=165
CNTLUNIT CUNUMBR=1E00,PATH=1E,UNITADD=((00,32)),UNIT=NOCHECK,LINK=C5
IODEVICE CUNUMBR=1E00,ADDRESS=(1700,30)UNIT=3270-X,UNITADD=00,PARTITION=(PROD1)
IODEVICE CUNUMBR=1E00,ADDRESS=(171E,2)UNIT=3284,UNITADD=1E,PARTITION=(PROD1)