IBM TotalStorage 3534-F08, Installation Manual

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Glossary
This glossary provides definitions for the
fibre-channel and switch terminology used for the
IBM 3534 Model F08.
This glossary defines technical terms and
abbreviations used in this book. If you do not find
the term you are looking for, see the IBM Glossary
of Computing Terms located at
www.ibm.com/networking/nsg/nsgmain.htm
This glossary also includes terms and definitions
from:
v Information Technology Vocabulary by
Subcommittee 1, Joint Technical Committee 1,
of the International Organization for
Standardization and the International
Electrotechnical Commission (ISO/IEC
JTC1/SC1). Definitions are identified by the
symbol (I) after the definition; definitions taken
from draft international standards, committee
drafts, and working papers by ISO/IEC
JTC1/SC1 are identified by the symbol (T) after
the definition, indicating that final agreement
has not yet been reached among the
participating National Bodies of SC1.
v IBM Glossary of Computing Terms. New York:
McGraw-Hill, 1994.
The following cross-reference conventions are
used in this glossary:
See Refers you to (a) a term that is the
expanded form of an abbreviation or
acronym, or (b) a synonym or more
preferred term.
See also
Refers you to a related term.
8b/10b encoding. An encoding scheme that converts
each 8-bit byte into 10 bits. Used to balance ones and
zeros in high-speed transports
ACL. Access control list.
address identifier. A 24-bit or 8-bit value used to
identify the source or destination of a frame.
alias address identifier. An address identifier
recognized by a port in addition to its standard identifier.
An alias address identifier may be shared by multiple
ports.
alias AL_PA. An AL_PA value recognized by an L_port
in addition to the AL_PA assigned to the port. See also
arbitrated loop physical address.
alias server. A fabric software facility that supports
multicast group management.
AL_PA. See arbitrated loop physical address.
American National Standards Institute (ANSI). The
governing body for fibre channel standards in the U.S.A.
ANSI. See American National Standards Institute.
API. See application programming interface.
application programming interface (API). A defined
protocol that allows applications to interface with a set
of services.
ARB. See arbitrate primitive signal.
arbitrate primitive signal. A primitive signal that is
transmitted as the fill word by an L_port to indicate that
the L_port is arbitrating to access to the loop. Applies
only to the arbitrated loop topology.
arbitrated loop. A shared 100 MBps fibre-channel
transport structured as a loop and supporting up to 126
devices and one fabric attachment. A port must
successfully arbitrate before a circuit can be
established.
arbitrated loop physical address (AL_PA). An 8-bit
value used to uniquely identify an individual port within
a loop. A loop may have one or multiple AL_PAs.
ARP. Address resolution protocol.
ASIC. Application-specific integrated circuit.
asynchronous transfer mode (ATM). A broadband
technology for transmitting data over LANs or WANs,
based on relaying cells of fixed size. Provides
any-to-any connectivity, and nodes can transmit
simultaneously.
ATM. See asynchronous transfer mode.
autoranging. A power supply that accommodates
different input voltages and line frequencies.
arbitration wait timeout value (AW_TOV). The
minimum time an arbitrating L_port waits for a response
before beginning loop initialization.
AW_TOV. See arbitration wait timeout value.
bandwidth. The total transmission capacity of a cable,
link, or system. Usually measured in bits per second
(bps). May also refer to the range of transmission
frequencies available to a network. See also throughput.
© Copyright IBM Corp. 2002
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