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How storage systems are identified

When the FC protocol service is first initialized, it assigns a WWNN to a storage system based on the serial number of its NVRAM adapter. The WWNN is stored on disk.

Each target port on the HBAs installed in the storage system has a unique WWPN. Both the WWNN and the WWPN are a 64-bit address represented in the following format: nn:nn:nn:nn:nn:nn:nn:nn, where n represents a hexadecimal value.

You can use commands such as fcp show adapter, fcp config, sysconfig -v, or fcp nodename to see the system’s WWNN as FC Nodename or nodename, or the system’s WWPN as FC portname or portname.