Cup configuration recommendations – Brocade FICON Administrator’s Guide (Supporting Fabric OS v7.3.0) User Manual
Page 55
ATTENTION
Once FMS mode is enabled, you cannot bind addresses 0xFE or 0xFF to any ports using either the
portAddress or wwnAddress commands.
•
The switch is advertised to the mainframe by the CUP as having a specific number of ports, which
is based on the hardware platform. The maximum supported switch size is 256 ports.
•
The FE and FF addresses are not components of the Allow/Prohibit Matrixes (as they are called in
Brocade Network Advisor and Web Tools), because the Prohibit Dynamic Connectivity Masks
(PDCMs) for the ports associated with FE and FF are defined architecturally and cannot be
modified by the user.
•
The port address name for the internal FE port can be read by the host, and corresponds to the
switch name that is set for the switch. The switch name can be modified by the host, with the
limitation that the host can write Extended Binary Coded Decimal Interchange Code (EBCDIC)
characters that cannot be converted directly to ASCII for display in the GUI or CLI management
interfaces. Such characters will be converted to dots (...) for these displays.
•
Addresses FE and FF are not available for external connections. Before enabling FMS mode, you
must manually disable physical ports associated with FE and FF if there is an active device
connected to these ports. If there is an active device connected to either of these ports, Fabric OS
will not enable FMS mode until either the port is disabled or the device is taken offline (logs out of
the switch). If there is no active device connected, these ports will automatically disable when FMS
enables. Because the ports associated with FE and FF are not available after enabling FMS mode,
you should first move any fiber connected to either of them to another free port. For more
information, refer to
on page 55.
CUP configuration recommendations
The following are recommendations for setting up FICON CUP:
•
Device Type: 2032
Use device type 2032 as the CUP "UNIT" type for the CNTLUNIT and IODEVICE statements in the
IOCDS or HCD. Although IBM has developed new machine types for switches, all Brocade
Backbones and switches regardless of model or manufacture should be configured as 2032.
•
Paths
Define at least two CHPIDs as paths to the CUP in the IOCDS Control Unit statement for the switch
to ensure redundancy for host connectivity.
•
RMF 74-7 statistics gathering
So as not to overwhelm the CUP, the recommended best practice in a sysplex environment is to
disable FICON switch statistics (RMF polling) on all but one host system that has in-band access to
the CUP. If no FICON statement is specified, the system will gather switch statistics by default so
FICON switch statistics should be disabled on all but the system intended to gather statistics.
•
Missing Interrupt Handler (MIH)
Set the MIHPTO to three minutes (180 seconds).
NOTE
Although 180 seconds should be the default value set on the switch when FMS mode is enabled,
this value may not be set when older versions of Fabric OS are upgraded. This value must be set
on the host system as well.
CUP configuration recommendations
FICON Administrator's Guide
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