Deployment Guide

There are two types of area assignment modes with 256-area addressing: zero-based and port-based.
ATTENTION
On default logical switches with an address mode other than mode 1, any 48-port and 64-port blades
are disabled if FICON Management Server (FMS) is enabled.
Refer to the FICON Administrator's Guide for more details if needed.
Zero-based addressing (mode 1)
With zero-based addressing, unique area assignments begin at zero regardless of where the port is
physically located. This allows FICON users to make use of high port count blades with port indexes
greater than 256.
Zero-based addressing assigns areas when the ports are added to the logical switch, beginning at area
0x00. When a port is assigned to a logical switch, the next free PID starting from 0x00 is assigned. This
mode allows FICON customers to make use of the upper ports of a 48-port or 64-port blade.
Zero-based mode is supported on the default switch.
Port-based addressing (mode 2)
With port-based addressing, unique area assignments are based on the port index.
Port-based addressing mode does not allow FICON users to make use of ports with an index greater
than 256 (high ports of a high port count blade), but this mode is compatible with domain-index zoning.
Port-based addressing is not supported on the default switch.
The 48-port and 64-port blades have the following restrictions:
• Port-based addressing is not supported on the upper 16 ports of a 64-port blade on the Brocade
DCX-4S and DCX 8510-4 Backbones.
• In the Brocade DCX and DCX 8510-8, port-based addressing is not supported on the 48-port blades.
Only zero-based addressing is supported on these blades.
WWN-based PID assignment
WWN-based PID assignment is disabled by default. When the feature is enabled, bindings are created
dynamically; as new devices log in, they automatically enter the WWN-based PID database. The
bindings exist until you explicitly unbind the mappings through the CLI or change to a different
addressing mode. If there are any existing devices when you enable the feature, you must manually
enter the WWN-based PID assignments through the CLI.
This feature also allows you to configure a PID persistently using a device WWN. When the device logs
in to the switch, the PID is bound to the device WWN. If the device is moved to another port in the same
switch, or a new blade is hot-plugged, the device receives the same PID (area) at its next login.
Once WWN-based PID assignment is enabled, you must manually enter the WWN-based PID
assignments through the CLI for any existing devices.
Zero-based addressing (mode 1)
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