IBM SAN16B-2 User Guide - Page 73

director/switch - implemention

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Challenge Handshake Authentication Protocol (CHAP). (1) An authentication protocol that protects against eavesdropping by encrypting the user name and password. (2) Allows remote servers and clients to securely exchange authentication credentials. chassis. The metal frame in which the switch and switch components are mounted. CIM. See Common Information Model circuit. An established communication path between two ports. Consists of two virtual circuits capable of transmitting in opposite directions. See also link. class 1 service. The class of frame-switching service for a dedicated connection between two communicating ports (also called ″connection-oriented service″). Includes acknowledgement of frame delivery or nondelivery. class 2 service. A connectionless class of frame-switching service that includes acknowledgement of frame delivery or nondelivery. class 3 service. A connectionless class of frame-switching service that does not include acknowledgement of frame delivery or nondelivery. Can be used to provide a multicast connection between the frame originator and recipients, with acknowledgement of frame delivery or nondelivery. class 4 service. A connection-oriented service that allows fractional parts of the bandwidth to be used in a virtual circuit. class 6 service. A connection-oriented multicast service geared toward video broadcasts between a central server and clients. class F service. The class of frame-switching service for a direct connection between two switches, allowing communication of control traffic between the E_Ports. Includes acknowledgement of data delivery or nondelivery. class of service. A specified set of delivery characteristics and attributes for frame delivery. CLI. See command line interface. client. A system or process that is dependent on another system or process (usually called the server) to provide it with access to data, services, programs, or resources. comma. A unique pattern (either 1100000 or 0011111) used in 8b/10b encoding to specify character alignment within a data stream. command line interface (CLI). Interface that depends entirely on the use of commands, such as through Telnet or simple network management protocol (SNMP), and does not involve a graphical user interface. Common Information Model (CIM). An implementation-neutral, object-oriented schema for describing network management information. The Distributed Management Task Force (DMTF) develops and maintains CIM specifications. community (SNMP). A relationship between a simple network management protocol (SNMP) agent and a set of SNMP managers that defines authentication, access control, and proxy characteristics. compact flash. Flash (temporary) memory that is used in a manner similar to hard disk storage. It is connected to a bridging component that connects to the PCI bus of the processor. Not visible within the processor's memory space. control processor (CP). The central processing unit that provides all control and management functions in a switch. control processor card (CP card). The central processing unit of the director/switch, which contains two control processor (CP) card slots to provide redundancy. Provides Ethernet, serial, and modem ports with the corresponding light-emitting diodes (LEDs). CP. See control processor. CP card. See control processor card. CPU. See central processing unit. credit. When applied to a switch, the maximum number of receive buffers provided by a fabric port (F_port) or fabric loop port (FL_port) to its attached node port (N_port) or node loop port (NL_port), respectively, such that the N_port or NL_port can transmit frames without over-running the F_port or FL_port. CRU. See customer replaceable unit CSA. Canadian Standards Association. customer replaceable unit (CRU). An assembly that is replaced in its entirety by a customer when any one of its components fails. In contrast, a field replaceable unit (FRU) can only be replaced by a qualified service representative. cut-through. A switching technique that allows the route for a frame to be selected as soon as the destination address is received. See also route. D data rate. The rate at which data is transmitted or received from a device. Interactive applications tend to require a high data rate, while batch applications can usually tolerate lower data rates. Glossary 51

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Challenge
Handshake
Authentication
Protocol
(CHAP).
(1)
An
authentication
protocol
that
protects
against
eavesdropping
by
encrypting
the
user
name
and
password.
(2)
Allows
remote
servers
and
clients
to
securely
exchange
authentication
credentials.
chassis.
The
metal
frame
in
which
the
switch
and
switch
components
are
mounted.
CIM.
See
Common
Information
Model
circuit.
An
established
communication
path
between
two
ports.
Consists
of
two
virtual
circuits
capable
of
transmitting
in
opposite
directions.
See
also
link
.
class
1
service.
The
class
of
frame-switching
service
for
a
dedicated
connection
between
two
communicating
ports
(also
called
″
connection-oriented
service
″
).
Includes
acknowledgement
of
frame
delivery
or
nondelivery.
class
2
service.
A
connectionless
class
of
frame-switching
service
that
includes
acknowledgement
of
frame
delivery
or
nondelivery.
class
3
service.
A
connectionless
class
of
frame-switching
service
that
does
not
include
acknowledgement
of
frame
delivery
or
nondelivery.
Can
be
used
to
provide
a
multicast
connection
between
the
frame
originator
and
recipients,
with
acknowledgement
of
frame
delivery
or
nondelivery.
class
4
service.
A
connection-oriented
service
that
allows
fractional
parts
of
the
bandwidth
to
be
used
in
a
virtual
circuit.
class
6
service.
A
connection-oriented
multicast
service
geared
toward
video
broadcasts
between
a
central
server
and
clients.
class
F
service.
The
class
of
frame-switching
service
for
a
direct
connection
between
two
switches,
allowing
communication
of
control
traffic
between
the
E_Ports.
Includes
acknowledgement
of
data
delivery
or
nondelivery.
class
of
service.
A
specified
set
of
delivery
characteristics
and
attributes
for
frame
delivery.
CLI.
See
command
line
interface
.
client.
A
system
or
process
that
is
dependent
on
another
system
or
process
(usually
called
the
server)
to
provide
it
with
access
to
data,
services,
programs,
or
resources.
comma.
A
unique
pattern
(either
1100000
or
0011111)
used
in
8b/10b
encoding
to
specify
character
alignment
within
a
data
stream.
command
line
interface
(CLI).
Interface
that
depends
entirely
on
the
use
of
commands,
such
as
through
Telnet
or
simple
network
management
protocol
(SNMP),
and
does
not
involve
a
graphical
user
interface.
Common
Information
Model
(CIM).
An
implementation-neutral,
object-oriented
schema
for
describing
network
management
information.
The
Distributed
Management
Task
Force
(DMTF)
develops
and
maintains
CIM
specifications.
community
(SNMP).
A
relationship
between
a
simple
network
management
protocol
(SNMP)
agent
and
a
set
of
SNMP
managers
that
defines
authentication,
access
control,
and
proxy
characteristics.
compact
flash.
Flash
(temporary)
memory
that
is
used
in
a
manner
similar
to
hard
disk
storage.
It
is
connected
to
a
bridging
component
that
connects
to
the
PCI
bus
of
the
processor.
Not
visible
within
the
processor’s
memory
space.
control
processor
(CP).
The
central
processing
unit
that
provides
all
control
and
management
functions
in
a
switch.
control
processor
card
(CP
card).
The
central
processing
unit
of
the
director/switch,
which
contains
two
control
processor
(CP)
card
slots
to
provide
redundancy.
Provides
Ethernet,
serial,
and
modem
ports
with
the
corresponding
light-emitting
diodes
(LEDs).
CP.
See
control
processor
.
CP
card.
See
control
processor
card
.
CPU.
See
central
processing
unit
.
credit.
When
applied
to
a
switch,
the
maximum
number
of
receive
buffers
provided
by
a
fabric
port
(F_port)
or
fabric
loop
port
(FL_port)
to
its
attached
node
port
(N_port)
or
node
loop
port
(NL_port),
respectively,
such
that
the
N_port
or
NL_port
can
transmit
frames
without
over-running
the
F_port
or
FL_port.
CRU.
See
customer
replaceable
unit
CSA.
Canadian
Standards
Association.
customer
replaceable
unit
(CRU).
An
assembly
that
is
replaced
in
its
entirety
by
a
customer
when
any
one
of
its
components
fails.
In
contrast,
a
field
replaceable
unit
(FRU)
can
only
be
replaced
by
a
qualified
service
representative.
cut-through.
A
switching
technique
that
allows
the
route
for
a
frame
to
be
selected
as
soon
as
the
destination
address
is
received.
See
also
route
.
D
data
rate.
The
rate
at
which
data
is
transmitted
or
received
from
a
device.
Interactive
applications
tend
to
require
a
high
data
rate,
while
batch
applications
can
usually
tolerate
lower
data
rates.
Glossary
51