HP StorageWorks 2/32 SAN switch 2/32 version 4.0.x installation guide - Page 52

Core Switch PID Format Summary, Important Information on Checking the Core Switch PID Format

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Installing the SAN Switch 2/32 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 that 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. An example PID might look like this: 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 Updating the Core Switch PID Format is necessary 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. Note: If the Core PID format is set to 0 in switches already running in the SAN, you must follow the procedures in Appendix B, "Updating the Core Switch PID Format" to change the parameter to 1. If the Core Switch PID format is not changed to 1 to match the SAN Switch 2/32's value, then the switches residing in the SAN will fail to communicate with one another. 52 SAN Switch 2/32 Installation Guide

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Installing the SAN Switch 2/32
52
SAN Switch 2/32 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 that 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. An
example PID might look like this: 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
Updating the Core Switch PID Format is necessary 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.
Note:
If the Core PID format is set to 0 in switches already running in the SAN, you
must follow the procedures in Appendix B, “
Updating the Core Switch PID Format
” to
change the parameter to 1. If the Core Switch PID format is not changed to 1 to match
the SAN Switch 2/32’s value, then the switches residing in the SAN will fail to
communicate with one another.