Technical data

Fabric OS Administrator’s Guide 7-19

Publication Number: 53-0000518-09

Recording Configuration Information

Sample IOCP Configuration File for SilkWorm 3900, 12000, and

24000 Switches

The channel subsystem controls communication between a configured channel, the control unit, and the

device. The I/O Configuration Dataset (IOCDS) defines the channels, control units, and devices to the

designated logical partitions (LPARs) within the server; this is defined using the Input/Output

Configuration Program (IOCP). The IOCP statements are typically built using the hardware

configuration dialog (HCD). The interactive dialog is used to generate your Input/Output Definition

File (IODF), invoke the IOCP program, and subsequently build your production IOCDS.

Each FICON director in a fabric must have a unique domain ID and a unique switch ID. The switch ID

used in the IOCP definitions can be any value between x’00’ to x’FF’. The domain ID range for

directors is hex x'01' to x'EF' or decimal 1 to 239. When defining the switch IDs in the IOCP definitions,

ensure that you use values within the FICON director’s range.

The switch ID has to be assigned by the user and must be unique within the scope of the definitions

(IOCP and HCD).

The domain ID is assigned by the manufacturer and can be customized to a different value. It must be

unique within the fabric.

Brocade recommends that the switch ID (in IOCP or HCD) be set to the same value as the domain ID of

the FICON director, which is defined to the FICON director at installation time. This simplifies the

configuration and reduces confusion by having a common designation across all definitions.

For more information, refer to the IBM publication zSeries Input/Output Configuration Program User’s