Arbitrated Loop

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Can have up to 126 addresses (NL-Port) and 1 FL-Port

LISM – Loop Initialization Select Master

LIFA – Loop Initialization Fabric Address

LIPA – Loop Initialization Previous Address

LIHA – Loop Initialization Hard Address

LISA – Loop Initialization Soft Address

LIRP – Loop Initialization Report Position

LILP – Loop Initialization Loop Position


More information can be found on Wikipedia Arbitrated Loop

134 total possible ALPA’s due to neutral disparity requirements. Many are used for internal functions as explained here: Fibre Channel Network Protocols

The lower the ALPA the higher the priority of the device. FL port is always assigned x00.

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