Preferred Loop ID

The Fibre Channel Loop ID in NVSRAM is used to determine the Preferred AL_PA (hard address). The Loop ID is displayed only for controllers attached using the Arbitrated Loop topology.

This ID is NOT the AL_PA, but an index into a table of valid AL_PA values (see Annex K of the FC-AL standard). Loop IDs are assigned an arbitration priority with (host-side IDs) 0 being the lowest and 126 being the highest.