Brocade FICON Administrator’s Guide (Supporting Fabric OS v7.3.0) - Manual (Page 53)

Configuring FICON CUP
● Control Unit Port overview.............................................................................................. 51
● Port and switch naming standards for FMS mode.......................................................... 54
● Configuring FICON CUP................................................................................................. 55
● Determining physical port assignment ........................................................................... 56
● FMS mode and FICON CUP...........................................................................................56
● Mode register bit settings................................................................................................ 60
● Setting the MIHPTO value.............................................................................................. 63
● Persistently enabling and disabling ports for CUP.......................................................... 64
Control Unit Port overview
The Control Unit Port (CUP) provides an in-band management interface defined by IBM that defines the
channel command words (CCWs) that the FICON host can use for managing the switch. The protocol
used is the IBM version of the ANSI FC-SB3 single-byte command code specification, which defines the
protocol used for transporting CCWs to the switch, and for the switch to direct data and status back.
The CUP is an optional licensed feature.
The CUP provides an interface for host in-band management and collection of FICON switch
performance metrics using the Resource Measurement Facility (RMF) 74-7 record, more commonly
known as the FICON Director Activity Report. Host-based management programs manage the FICON
switches by sending commands to the switch control unit defined in the I/O Configuration Data Set
(IOCDS) and hardware configuration definition (HCD). A FICON switch that supports CUP can be
controlled by one or more host-based management programs or switch consoles. Control of the FICON
switches can be shared between these options. CUP commands, or CCWs, monitor and control FICON
switch functions. CUP commands are oriented towards management of a single switch, even though
the use of CUP in a cascaded FICON environment is fully supported.
NOTE
The CUP port address will always be xxFExx. Port addresses xxFE and xxFF are unavailable to assign
to physical ports when FMS is enabled. For more information, refer to
Disabling ports 0xFE and 0xFF
on page 55.
FICON Administrator's Guide 51
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