HP AA-RS2WC-TE, Installation Manual

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Installing and Configuring the Core Switch 2/64
71 Core Switch 2/64 V4.1 Installation Guide
Core Switch PID Format Summary
A Core PID format is one of several addressing formats used in Fibre Channel.
The parameter is used by the routing and zoning services in Fibre Channel fabrics
to identify ports in the network.
The PID format is analogous to specifying the physical switch and port a device is
attached to in data networks. It is not analogous to an IP address. PIDs are
assigned by a Fibre Channel switch when a device logs into the fabric.
The following example shows a sample PID:
011F00
Many scenarios cause a device to receive a new PID. For example, unplugging the
device from one port and plugging it into a different port will cause this. (This
might happen when cabling around a bad port, or when moving equipment
around.) Another example is changing the domain ID of a switch, which might be
necessary when merging fabrics, or changing compatibility mode settings.
Note: All switches running Fabric OS version 4.0.x or higher are shipped with the
Core Switch PID Format enabled, so it is not necessary to change the Core Switch PID
format on these switches. For example, the HP StorageWorks SAN Switch 2/32 and
HP StorageWorks Core Switch 2/64 always use Core Switch PID format 1. This
parameter is always 1 and cannot be changed.
Important Information on Checking the Core Switch PID Format
You must update the Core Switch PID Format when upgrading an existing SAN
to support larger port-count switches. When a switch with more than 16 ports is
introduced into an existing fabric, this parameter needs to be set on all switches in
the fabric.
For example, all SAN Switch 2/32 units ship with the Core Switch PID format set
to 1. Before connecting to the SAN, you must verify that the Core Switch PID
formats of all switches already running in the SAN are also set to 1.