Fabric OS Administrator's Guide v7.0.0 (53-1002148-02, June 2011)

332 Fabric OS Administrator’s Guide
53-1002148-02
User- and auto-assigned FA-PWWN behavior
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• Use FA-PWWN to represent a server in boot LUN zone configurations so that any physical
server that is mapped to this FA-PWWN can boot from that LUN, thus simplifying boot over SAN
configuration.
For the server to use this feature, it must be using a Brocade HBA/Adapter with HBA driver version
3.0.0.0 or later. Some configuration of the HBA must be performed to use FA-PWWN.
User- and auto-assigned FA-PWWN behavior
An FA-PWWN can be either user-generated or automatically assigned by the fabric. The
automatically assigned FA-PWWN is created by default when you enable the feature without
explicitly providing a VPWWN.
Each switch port and AG port can be assigned up to two WWNs, one assigned automatically and
one assigned by the user. Only one FA-PWWN can be active at any given time. The user-assigned
FA-PWWN takes precedence over the automatically assigned FA-PWWN. This means the switch will
bind the user-assigned FA-PWWN to the port if both a user-assigned and an automatically assigned
FA-PWWN are available. If you want to select the automatically assigned FA-PWWN over the
user-assigned FA-PWWN, you must delete the user-assigned FA-PWWN from the port to which it has
been assigned.
Checking for duplicate FA-PWWNs
The switch ensures that automatically assigned FA-PWWNs are unique in a fabric. However, it is the
responsibility of the administrators to ensure that user-assigned FA-PWWNs are also unique
throughout the fabric.
ATTENTION
The administrators should ensure that the same user-assigned FA-PWWN is not used in multiple
chassis. There is no fabric-wide database, and adding the same FA-PWWNs in multiple chassis
causes duplicate PWWNs.
Configuring FA-PWWNs
Use the faPwwn command to create and manage FA-PWWNs. The faPwwn command supports the
following management tasks:
• Bind an automatically assigned or a user-assigned FA-PWWN to a switch port.
• Override an automatically assigned FA-PWWN with a user-assigned FA-PWWN.
• Bind an AG port with an automatically assigned or a user-assigned FA-PWWN.
• Delete any existing FA-PWWN bindings.
• Move an FA-PWWN from one port to another port.
• Move an FA-PWWN assigned to an AG port to another AG.
• Display information about configured FA-PWWN bindings.
Refer to the Fabric OS Command Reference for information about using this command.