HP P4459A manual Lilp

Glossary

LILP

Loop Initialization Loop Position map is the accumulation of all of the information reported in the LIRP frames. It is optionally sent out by the initialization master at the end of the initialization sequence.

Link

In this context, it is a pair of fibers (RX for inbound and TX for outbound) that carries information to and from a port. It is also called a channel.

LIP

Loop Initialization Primitive. A Fibre Channel Primitive Sequence transmitted by FC-AL devices and infrastructure to signal a potential topology change, and to put all devices attached to a loop into the same state for the purposes of Loop Initialization and Loop Address administration. It can include LISM, AL_PA assignment, and building a positional map of the loop.

LIRP

Loop Initialization Report Position establishes a position map which is a table of all the AL_PAs on a node. See also LIFC.

LISM

Loop Initialization Select Master is the process used to determine the temporary loop master as part of the LIP.

Long Wave

Lasers or LEDs that emit light with wave lengths around 1300 nm. Long wave lasers are used for long Fibre Channel links, from ~700-2000m. They are typically used with single-mode fiber with a 9-micron core size.

Loop ID

A unique 7-bit value from 0 to 126 that represents the 127 valid AL_PAs (physical addresses) on a loop.

Loop Tenancies

The time required for a data transfer to be completed. An FC node wanting to send data starts a loop tenancy by arbitrating for ownership of the loop. Upon winning arbitration, the device wanting to send data opens a communication channel to its intended destination. When the destination device responds that it has available buffer space, the sender sends data until it is finished. After the data transfer is complete, the sender closes the loop tenancy.

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