HP StorageWorks 2/16 - SAN Switch User Manual page 67

Glossary
Loop Circuit
A temporary bidirectional communication path established between L_Ports.
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.
LWL
Long Wavelength; a type of fiber optic cabling that is based on 1300-mm lasers and
supports link speeds of 1.0625 Gbps. May also refer to the type of GBIC or SFP. See also
SWL.
Master Port
As relates to trunking, the port that determines the routing paths for all traffic flowing
through the trunking group. One of the ports in the first ISL in the trunking group is
designated as the master port for that group. See also ISL Trunking.
MIB
Management Information Base; an SNMP structure to help with device management,
providing configuration and device information.
Monitoring State
The state in which a port is monitoring the flow of information for data relevant to the port.
Multicast
The transmission of data from a single source to multiple specified N_Ports (as opposed to
all the ports on the network). See also Broadcast, Unicast.
Multimode
A fiber optic cabling specification that allows up to 500 meters between devices.
N_Port
Node Port; a port on a node that can connect to a Fibre Channel port or to another N_Port in
a point-to-point connection. See also NL_Port, Nx_Port.
Quickloop Fabric Assist User Guide 67