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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 Glossary of
Computing Terms 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.
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.
Numerics
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
16–port card. The Fibre Channel port card provided
with SAN switch directors. Contains 16 ports and the
corresponding light-emitting diodes (LEDs). See also
port card .
A
access control list (ACL). Enables an organization to
bind a specific worldwide name (WWN) to a specific
switch port or set of ports, preventing a port in another
physical location from assuming the identity of a real
WWN. Can also refer to a list of the read/write access
of a particular community string. See also device
connection controls .
account level switches. Switches that have four login
accounts into the operating system (in descending
order): root, factory, admin, and user. See also admin
account .
ACL. See access control list.
address identifier. A 24–bit or 8–bit value used to
identify the source or destination of a frame.
admin account. A login account intended for use by
the customer to control switch operation. See also
account level switches .
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.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.
application-specific integrated circuit (ASCI). In
computer chip design, an integrated circuit created by
first mounting an array of unconnected logic gates on a
substrate and later connecting these gates in a
particular configuration for a specific application. This
design approach allows chips for a variety of
applications to be made from the same generic gate
array, thereby reducing production costs
ARB. See arbitrate primitive signal .
© Copyright IBM Corp. 2004
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