HP 1606 FICON Administrator's Guide v6.4.0 (53-1001771-01, June 2010) - Page 37

Control Unit Port (CUP) overview 3 The addresses FE/FF are not components of the Allow/Prohibit Matrixes (as they are called in DCFM) or CUP Configurations (as they are referred to in WebTools), because the PDCMs for these two ports are defined architecturally and cannot be modified, FF being an unimplemented port and FE the internal port, whose PDCM must have no bits set, and cannot be modified. The Port Address Name for the internal port can be read by the host, and corresponds to the switchname that is set for the switch. The switchname may be modified by the host, with the limitation that the host may write EBCDIC characters that cannot be converted directly to ASCII for display in the GUI or CLI management interfaces. • Although FICON attachment on 48 port blades is not supported in interopMode 2 (because D,I zoning cannot be implemented), the FC8-48 blade supports FICON attachment in switches or logical switches operating in interopMode 0. In the Brocade DCX, the FC8-48 is only supported in a logical switch configured for zero-based addressing. • Ports 0xFE and 0xFF must be disabled before FMS can be successfully enabled. CUP configuration recommendations The following are recommendations for setting up FICON CUP: • Device Type: 2032 Although IBM has developed new machine types for the switches and directors, all directors and switches regardless of model or manufacture should be configured as 2032. • Paths Define the CUP on at least two CHPIDs and define a primary and secondary path for HA. • 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 system. If no FICON statement is specified, the system will gather switch statistics by default so this should be disabled on all but the system intended to gather statistics. • Missing Interrupt Handler (MIH) Set the MIHPTO to three minutes (180 seconds). FICON CUP zoning and PDCM considerations The FICON Prohibit Dynamic Connectivity Masks (PDCMs) controls whether or not communication between a pairs ports in the switch is prohibited or allowed. PDCMs are a per-port construct. Each port on the switch has it's own PDCM defines whether communication is allowed between that particular port, and each of the other ports in the switch, including itself. The Allow/Prohibit Matrix presents a matrix that allows you to set and clear the PDCMs for all external ports. If there are any differences in restrictions set up with Brocade Advanced Zoning and PDCMs, the most restrictive rules are automatically applied. All FICON devices should be configured in a single zone using the domain,area notation. The Allow/Prohibit matrix can then be used to Allow or Prohibit access between specific port pairs. FICON Administrator's Guide 25 53-1001771-01