World Wide Port Name

In computing, a World Wide Port Name, WWPN, or WWpN, is a World Wide Name assigned to a port in a Fibre Channel fabric.[1][2] Used on storage area networks, it performs a function equivalent to the MAC address in Ethernet protocol, as it is supposed to be a unique identifier in the network.

A WWPN is a World Wide Port Name; a unique identifier for each Fibre Channel port presented to a Storage Area Network (SAN).[3] Each port on a Storage Device has a unique and persistent WWPN.

A World Wide Node Name, WWNN, or WWnN, is a World Wide Name assigned to a node (an endpoint, a device) in a Fibre Channel fabric. It is valid for the same WWNN to be seen on many different ports (different addresses) on the network, identifying the ports as multiple network interfaces of a single network node.

References

  1. ^ "IBM Storage FlashSystem 7300 and 7200". IBM. 2025-02-28. Retrieved 2025-11-10.
  2. ^ Troppens, Ulf; Erkens, Rainer; Müller, Wolfgang (2005-08-05). Storage Networks Explained: Basics and Application of Fibre Channel SAN, NAS, iSCSI and InfiniBand. John Wiley & Sons. p. 73. ISBN 978-0-470-86183-7. Retrieved 2025-11-10.
  3. ^ Sheldon, Robert (2022-04-22). "What is World Wide Name (WWN) in Fibre Channel SANs?". Search Storage. Retrieved 2025-11-10.
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