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Glossary
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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.