HP StorageWorks 2/64 HP StorageWorks Core Switch 2/64 and SAN Director 2/128 I - Page 51
PID format summary, Mixed fabric environment with different switch platforms
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PID format summary This section describes the process ID (PID) addressing format, which is one of several used in Fibre Channel operations. The PID 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. A sample PID looks like this: 011F00 Many scenarios cause a device to receive a new PID. For example, a device can receive a new PID when the device is unplugged from one port and plugged into a different port. (This might occur when cabling around a bad port or when moving equipment around.) It may also occur when you change the Domain ID of a switch, which may be necessary when merging fabrics, or changing compatibility mode settings. NOTE: All switches running Fabric OS version 4.0.x or later are shipped with the PID Format enabled, so it is not necessary to change the PID format on these switches. For example, the SAN Switch 2/32 and Core Switch 2/64 always use Core Switch PID format 1. This parameter is always 1 and cannot be changed. Mixed fabric environment with different switch platforms Fabric OS v2.6.2, v3.1.2, and v4.2.x introduced a new switch PID format: Extended Edge PID (format 2). Extended Edge PID is useful if you introduce a Fabric OS 4.2.x switch into a fabric that consists solely of Fabric OS v2.x and v3.x switches. Before adding a Fabric OS 4.2.x switch to such a fabric, refer to the HP StorageWorks Procedures user guide for the Fabric OS version running on your switch to get information on the Extended Edge PID format. NOTE: Switches must operate with Fabric OS v2.6.2, v3.1.2, v4.2.x, and later to use the Extended Edge PID format. If Extended Edge PID is set (before a downgrade from the current Fabric OS release to an earlier Fabric OS release that does not support the Extended PID format), PID needs to be set back to a supported format, such as Core PID (format 1) or native PID (format 0). Core Switch 2/64 and SAN Director 2/128 installation guide 51