FW V06.XX/HAFM SW V08.02.00 HP StorageWorks SAN High Availability Planning Guide (AA-RS2DD-TE, July 2004)

Planning Considerations for Fibre Channel Topologies
112 SAN High Availability Planning Guide
Port Numbering Versus Port Addressing
Consideration must be given to the implications of port numbering for the FCP
protocol versus logical port addressing for the FICON protocol. FCP
configuration attributes are implemented through zoning. Zones are configured
through the associated Element Manager application by authorizing or restricting
access to name server information associated with device N_Ports that attach to
director or switch F_Ports.
Zones are configured by:
■ The 8-byte (64-digit) WWN assigned to the host bus adapter (HBA) or Fibre
Channel interface installed in a device connected to the director or switch.
■ The domain identification (ID) and physical port number of the director or
edge switch port to which a device is attached.
FICON configuration attributes are implemented through logical port addressing.
This concept is consistent with the address-centric nature of FICON and allows
ports to be swapped for maintenance operations without regenerating a host
configuration.
Logical port addresses are derived by converting the port number from numerical
to hexadecimal format and adding a hexadecimal 4 to the result. Figure 46
illustrates port numbering and logical port addressing for the Director 2/64. The
figure shows:
■ Universal port module (UPM) card numbers at the top (numerical 0 through
15).
■ Numerical physical port numbers in blue (00 through 63).
■ Hexadecimal physical port numbers in red (00 through 3F).
■ Logical port addresses in bold (hexadecimal 04 through 43).
Figure 46: Director 2/64 port numbers and logical port addresses