Dell Emulex Family of Adapters - Manual (Page 447)

OneCommand Manager Command Line Interface Version 10.2 User Manual P010067-01A Rev. A
5. CLI Client Command Descriptions
WWN Management Commands
447
WWN Management Commands
Notes

Supported for FC/FCoE adapter ports only.

WWN management validates WWNs carefully to avoid WWPN duplication;
WWNN duplication is acceptable however. Therefore, you may see error and
warning messages if a name duplication is detected. It is strongly recommended
that the activation requirement be fulfilled after each WWN change or restore.
When running with “pending changes”, some diagnostic and maintenance
features are not allowed.
ChangeWWN
This command changes the volatile state of WWNs. If the volatile change is requested
on an adapter that does not support volatile WWNs, it returns a “not supported” error.
Notes

When a volatile change is supported, a reboot is required to activate the new
setting. Volatile names are active until system power-down or adapter
power-cycle.

For VMware ESXi:

After changing the WWN of an adapter, update your zoning settings before
you reboot your ESXi server. If the zoning is not updated before your
reboot, the subsequent boot may take a long time.

After changing the WWN of an adapter, you must reboot the ESXi system
before trying to access the adapter on that system. For information on
rebooting the ESXi system, refer to the VMware documentation.

For ESXi: If you are using the CIM interface to access adapters, after changing
the WWN of an adapter, you must restart the CIMOM (that is, SFCB) on the
ESXi system before trying to access the adapter on that system. For information
on restarting the CIMOM, refer to the VMware documentation.
Supported By
Linux, Solaris, VMware ESXi, and Windows
Syntax
ChangeWWN