Dell Emulex Family of Adapters - Manual (Page 1218)

OneCommand Manager for VMware vCenter Version 10.2 User Manual P010089-01A Rev. A
6. Managing Adapters and Ports
Viewing and Managing FC/FCoE LUNs
1218
Caution: Changing volatile WWNs result in taking the selected adapter
offline. Ensure that this adapter is not controlling a boot device and
all I/O activity on this adapter has stopped before proceeding.
Emulex assumes no responsibility for the consequences of making
volatile WWN changes on a boot adapter.
Considerations When Changing WWN Configuration for an FC Port

To avoid address conflicts, do not assign a WWNN or WWPN with
OneCommand Manager for VMware vCenter if you also use another address
management tool.

The WWPN and WWNN in the Pending Changes list can show “n/a” instead of
“none”. This happens when the remote host is busy processing some critical
task and WWN Management cannot obtain the current state of WWN
management.

In an environment where preboot management exists, a WWPN or WWNN
modified by OneCommand Manager for VMware vCenter can be overridden
by preboot management such as IBM BladeCenter Open Fabric Manager
(BOFM) and industry standard Command Line Protocol (CLP).
For example:

In an environment with CLP/BOFM: OneCommand Manager for VMware
vCenter modifies the WWNN or WWPN. OneCommand Manager for
VMware vCenter requires a reboot to complete the change. After a reboot,
the CLP string is sent during system boot and rewrites the WWNN or
WWPN, or EFIBoot finds the BOFM protocol and uses the default WWNN
or WWPN per BOFM's command.

In environment without CLP/BOFM: OneCommand Manager for VMware
vCenter modifies the WWNN or WWPN. OneCommand Manager for
VMware vCenter requires a reboot to complete the change. The system
comes up and OneCommand Manager for VMware vCenter modified
WWNN or WWPN is used.

On the system where OneCommand Manager for VMware vCenter is installed,
make sure the port numbers configured during the installation are open and
dedicated to the OneCommand Manager for VMware vCenter server only. No
other service should be listening on this port.
To change a port's WWPN or WWNN:
1. Select a host in the vSphere console tree-view and select the Emulex OneCommand
tab.
2. In the Emulex Device Management tree-view, select the FC port for which you want
to change the WWN information.
3. Select the Maintenance tab (Figure 6-9).
4. Click Change WWN. The Change WWN Configuration dialog box appears.