IBM SAN16B-2 - TotalStorage Express Model Switch, User And Service Manual

Page: 71 / 93

Glossary
This glossary provides definitions for Fibre
Channel and switch terminology used for IBM
TotalStorage SAN switches and related products.
It also provides additional definitions of technical
terms and abbreviations. If you do not find the
term you are looking for, see the IBM Terminology
located at http://www.ibm.com/ibm/terminology/
This glossary 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.
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.
A
access control list (ACL). In computer security, a list
associated with an object that identifies all the subjects
that can access the object and their access rights. For
example, an access control list is a list that is
associated with a file that identifies the users who can
access the file and that identified the user’s access
rights to that file.
ACL. See access control list.
address identifier. A 24–bit or 8–bit value used to
identify the source or destination of a frame.
alias. An alternate name for an element or group of
elements in the fabric. Aliases can be used to simplify
the entry of port numbers and worldwide names
(WWNs) when creating zones.
alias address identifier. An address identifier
recognized by a port in addition to its standard identifier.
An alias address identifier can be shared by multiple
ports.
alias AL_PA. An arbitrated loop physical address
(AL_PA) value recognized by a loop port (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.
ANSI. See American National Standards Institute .
API. See application programming interface .
application programming interface (API). An
interface that allows an application program that is
written in a high-level language to use specific data or
functions of the operating system or another program.
application-specific integrated circuit (ASIC). A
computer chip designed for a particular application.
ARB. See arbitrative primitive signal .
arbitrative primitive signal (ARB). A primitive signal
that is transmitted as the fill word by a loop port (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 can have one or multiple AL_PAs.
arbitration. A method of gaining orderly access to a
shared-loop topology.
arbitration wait timeout value (AW_TOV). The
minimum time an arbitrating loop port (L_port) waits for
a response before beginning loop initialization.
area number. A number that is assigned to each
potential port location in the switch. Used to distinguish
ports that have the same port number but are on
different port cards.
ASIC. See application-specific integrated circuit .
© Copyright IBM Corp. 2005
49