which is capable of addressing higher port counts. Changing from Native PID format to Core PID format
changes the PID, which requires hosts that use port binding to be rebooted.
Static PID mapping errors
If you can avoid using drivers that employ static PID binding, you should do so.
With the WWN or dynamic PID binding most typically used with drivers, changing the device's PID does
not affect the PID mapping. However, before updating the PID format, it is necessary to determine whether
any devices in the SAN use static PID binding.
For those few drivers that do use static PID binding, changing the PID format breaks the mapping, which
must be fixed either by rebooting the host or by using a manual update procedure on the host.
To correct mapping errors caused by static PID binding, see the following sections:
on page 528 or
"Port number to area ID
Changes to configuration data
lists various combinations of before-and-after PID formats, and indicates whether the
configuration is affected
to determine this), do not download old (pre-PID format change) configuration files to any switch
on the fabric.
Effects of PID format changes on configurations
After changing the fabric PID format and verifying correct fabric operation, resave configuration data by
running the configUpload command.
Before downgrading firmware, change the PID back to supported PIDs such as Core PID. If the database is
automatically converted, save the converted database, and then download the older OS.
PID format selection
All switches in a fabric must use the same PID format, so if you add a switch that uses a different PID format
to a fabric, the switch will segment from the fabric. The format you select for your fabric depends on the mix
of switches in the fabric, and to an extent on the specific releases of Fabric OS in use (for example,
Extended Edge PID format is available only in Fabric OS 3.1.2 and later and Fabric OS 4.2.0 through
If you are building a new fabric with switches running various Fabric OS versions, use Core PID format to
simplify port-to-area_ID mapping.
fabric" on page 526 for details on finding devices that use static PID binding. Then
"Changing the PID format
conversion" on page 530 for instructions.
After changing the fabric PID format, if the change invalidates the configuration data (see
PID format after
offline" on page 528 for recommendations.
Reenable zoning, if there is an active zone set and it uses
You do not need to reconfigure Destination ID (DID) if
The configure command to change the PID format
The performance monitor database
The zoning database
The DID will be converted by Fabric OS automatically.
Fabric OS 6.2 administrator guide 525