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Departmental Switch Model DS-16B2 Fabric OS Procedures Manual
g-9
Glossary
L
L_Port Loop Port; a node port (NL_Port) or fabric port (FL_Port) that has
arbitrated loop capabilities. An L_Port can be in one of two modes:
• Fabric mode-Connected to a port that is not loop capable, and
using fabric protocol.
• Loop mode- In an arbitrated loop and using loop protocol. An
L_Port in loop mode can also be in participating mode or non
participating mode.
See also Nonparticipating Mode and Participating Mode.
Latency The period of time required to transmit a frame, from the time it is
sent until it arrives.
Link As applies to Fibre Channel, a physical connection between two
ports, consisting of both transmit and receive fibres. See also Circuit.
Link Services A protocol for link related actions.
LIP Loop Initialization Primitive; the signal used to begin initialization in
a loop. Indicates either loop failure or resetting of a node.
LM_TOV Loop Master Tim Out Value; the minimum time that the loop master
waits for a loop initialization sequence to return.
Loop Failure Loss of signal within a loop for any period of time, or loss of
synchronization for longer than the time out value.
Loop Initialization The logical procedure used by an L_Port to discover its environment.
Can be used to assign AL_PA addresses, detect loop failure, or reset a
node.
Loop_ID A hex value representing one of the 127 possible AL_PA values in an
arbitrated loop.
Looplet A set of devices connected in a loop to a port that is a member of
another loop.
LPSM Loop Port State Machine; the logical entity that performs arbitrated
loop protocols and defines the behavior of L_Ports when they require
access to an arbitrated loop.