IBM TotalStorage L10, Cli Reference Manual

Page: 85 / 96

© Copyright IBM Corp. 2004
73
Glossary
Table 35. Glossary
AL_PA or Arbitrated
Loop Physical Address A one-byte value used to identify a port in an Arbitrated
Loop topology. The value of the AL_PA corresponds to bits
7:0 of the 24-bit Native Address Identifier.
Arbitration The process of selecting one respondent from a group
requesting service at the same time.
Close (CLS) An Arbitrated Loop protocol used to terminate a loop
circuit.
Current Fill Word The fill word that the Loop Port State Machine uses when
a fill word is to be transmitted.
Duplex Cable Two fibers in one cable suitable for duplex transmission.
Fiber Optics Light transmission through optical fibers for
communication or signaling.
Fibre Channel Fibre Channel is a data transfer interface technology that
maps several common transport protocols including IP
and SCSI, allowing it to merge high-speed I/O and
networking functionality in a single connectivity
technology. Fibre channel is an open standard as defined
by ANSI and OSI standards and operates over copper and
fiber optic cabling at distances of up to 10 kilometers. It is
unique in its support of multiple interoperable topologies
including point-to-point, arbitrated-loop and switching and
it offers several qualities of service for network
optimization. With its large packet sizes, Fibre Channel is
ideal for storage, video, graphic and mass data transfer
applications.
LED Light-emitting diode. A status indicator on a switch.
Gb/s Gigabits per second.
Node An entity with one or more N_Ports or NL_Ports.
Open (OPN) An Arbitrated Loop protocol used to establish a loop
circuit.
Protocol A data transmission convention which may include timing,
control, formatting, error detection with correction and
data representation.
SCSI Small computer system interface. Standard interface for
storage modules.
SFP Small form-factor pluggable transceiver. These
transceivers are fully compliant with FC-PI and MSA
standards and occupy less than half the board space of
the existing GBIC products.
Topology The logical and/or physical arrangement of stations on a
network. Fibre Channel topologies include point-to-point,
Arbitrated Loop, and switched fabric.
Transceiver A device that converts one form of signaling to another for
both transmission and reception. SFPs and GBICs are
transceivers.