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in-order
delivery
(IOD).
A
parameter
that,
when
set,
guarantees
that
frames
are
either
delivered
in
order
or
dropped.
integrated
fabric.
The
fabric
created
by
six
switches
cabled
together
and
configured
to
handle
traffic
as
a
seamless
group.
Internet
protocol
(IP).
In
the
Internet
suite
of
protocols,
a
connectionless
protocol
that
routes
data
through
a
network
or
interconnected
networks
and
acts
as
an
intermediary
between
the
higher
protocol
layers
and
the
physical
network.
inter-switch
link
(ISL).
A
Fibre
Channel
link
that
connects
two
switches
(a
link
from
the
expansion
port
(E_port)
of
one
switch
to
the
E_port
of
another).
IOD.
See
in-order
delivery
.
IP.
See
internet
protocol
.
IPA.
Initial
process
associator.
ISL.
See
inter-switch
link
.
ISL
Trunking.
A
feature
that
enables
distribution
of
traffic
over
the
combined
bandwidth
of
up
to
four
inter-switch
links
(ISLs)
(between
adjacent
switches),
while
preserving
in-order
delivery.
A
set
of
trunked
ISLs
is
called
a
trunking
group
;
each
port
employed
in
a
trunking
group
is
called
a
trunking
port
.
See
also
master
port
.
isolated
E_port.
An
expansion
port
(E_port)
that
is
online
but
not
operational
between
switches
due
to
overlapping
domain
ID
or
nonidentical
parameters
such
as
error
delay
timeout
values
(E_D_TOVs).
See
also
expansion
port
.
IU.
See
information
unit
.
J
JBOD.
Just
a
bunch
of
disks.
K
K28.5.
A
special
10-bit
character
used
to
indicate
the
beginning
of
a
transmission
word
that
performs
fibre
channel
control
and
signaling
functions.
The
first
seven
bits
of
the
character
are
the
comma
pattern.
See
also
comma
.
kernel
flash.
Flash
memory
that
stores
the
bootable
kernel
code
and
is
visible
within
the
memory
space
of
the
processor.
Data
is
stored
as
raw
bits.
key
pair.
In
public
key
cryptography,
a
pair
of
keys
consisting
of
a
public
and
private
key
of
an
entity.
The
public
key
can
be
publicized,
but
the
private
key
must
be
kept
secret.
L
LAN.
See
local
area
network
.
latency.
The
period
of
time
required
to
transmit
a
frame,
from
the
time
it
is
sent
until
it
arrives.
LED.
See
light-emitting
diode
.
light-emitting
diode
(LED).
A
semiconductor
chip
that
gives
off
visible
or
infrared
light
when
activated.
It
is
used
to
indicate
the
status
of
elements
on
a
switch.
link.
As
applies
to
fibre
channel,
a
physical
connection
between
two
ports,
consisting
of
both
transmit
and
receive
fibers.
See
also
circuit
.
link
services.
A
protocol
for
link-related
services.
LIP.
See
loop
initialization
primitive
.
LM_TOV.
See
loop
master
timeout
value
.
local
area
network
(LAN).
A
computer
network
located
on
a
user’s
premises
within
a
limited
geographical
area.
(T)
logical
unit
number
(LUN).
An
identifier
used
on
a
small
computer
systems
interface
(SCSI)
bus
to
distinguish
among
up
to
eight
devices
(logical
units)
with
the
same
SCSI
ID.
long
wavelength
(LWL).
A
type
of
fiber
optic
cabling
that
is
based
on
1300
mm
lasers
and
supports
link
speeds
of
1.0625
Gbps.
Can
also
refer
to
the
type
of
GBIC
or
SFP.
See
also
short
wavelength
.
loop.
A
configuration
of
devices
that
are
connected
to
the
fabric
by
way
of
a
fabric
loop
port
(FL_port)
interface
card.
loop
circuit.
A
temporary
bidirectional
communication
path
established
between
loop
ports
(L_ports).
loop
failure.
Loss
of
signal
within
a
loop
for
any
period
of
time,
or
loss
of
synchronization
for
longer
than
the
timeout
value.
loop_ID.
A
hexadecimal
value
representing
one
of
the
127
possible
arbitrated
loop
physical
address
(AL_PA)
values
in
an
arbitrated
loop.
loop
initialization.
The
logical
procedure
used
by
a
loop
port
(L_port)
to
discover
its
environment.
Can
be
used
to
assign
arbitrated
loop
physical
address
(AL_PA)
addresses,
detect
loop
failure,
or
reset
a
node.
loop
initialization
primitive
(LIP).
The
signal
used
to
begin
initialization
in
a
loop.
Indicates
either
loop
failure
or
resetting
of
a
node.
looplet.
A
set
of
devices
connected
in
a
loop
to
a
port
that
is
a
member
of
another
loop.
112
IBM
TotalStorage
SAN
Switch:
2109
Model
M12
Installation
and
Service
Guide
Summary of Contents for TotalStorage 2109 M12
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