Fibre Channel port numbers and worldwide port names
Fibre Channel (FC) ports are identified by their physical port number and by a worldwide port name (WWPN).
The physical port numbers identify Fibre Channel adapters
and cable connections when you run service tasks. World wide port names (WWPNs), which uniquely
identify the devices on the SAN, are used for tasks such as Fibre Channel switch configuration. The
WWPNs are derived from the worldwide node name (WWNN) of the node in which the ports are installed.