HP StorageWorks SAN Switch 2/32 Installation Manual page 99

Idle
Continuous transmission of an ordered set over a Fibre Channel link when no data is being
transmitted, to keep the link active and maintain bit, byte, and word synchronization.
ISL
Interswitch Link; a Fibre Channel link from the E_Port of one switch to the E_Port of another.
See also E_Port, Cascade.
Isolated E_Port
An E_Port that is online but not operational due to overlapping domain IDs or nonidentical
parameters (such as E_D_TOVs).
IU
Information Unit; a set of information as defined by either upper-level process protocol
definition or upper-level protocol mapping.
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.
Latency
The period of time required to transmit a frame, from the time it is sent until it arrives.
Link Services
A protocol for link-related actions.
Link
As applies to Fibre Channel, a physical connection between two ports, consisting of both
transmit and receive fibres.
LIP
Loop Initialization Primitive; the signal used to begin initialization in a loop. Indicates either
loop failure or resetting of a node.
Looplet
A set of devices connected in a loop to a port that is a member of another loop.
SAN switch 2/32 version 4.0.x installation guide
Glossary
Glossary–7