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.