Ethernet
port
The
M12
and
M14
provide
a
fully
IEEE
compliant
10BASE-T
or
100BASE-T
Ethernet
port
for
switch
management.
The
port
has
two
LEDs
that
indicates:
v
Speed
(10
Mbps
or
100
Mbps)
v
Status
of
the
connection
Additionally,
each
CP
has
its
own
Ethernet
port.
You
can
choose
to
connect
the
Ethernet
ports
to
each
other
through
an
Ethernet
switch
or
to
connect
them
to
separate
networks
for
greater
availability.
Each
CP
has
its
own
unique
IP
address
and
is
accessible
independent
of
the
other
CP.
Serial
port
Each
CP
comes
with
two
serial
ports.
The
top
serial
port
on
the
installed
CP
is
an
RS–232
port
that
is
used
for
remote
dial-in.
The
bottom
port
is
used
for
accessing
the
console.
Numbering
The
M12
and
M14
switches
use
a
numbering
scheme
that
progresses
from
left
to
right
and
bottom
to
top
in
numerical
order.
The
reference
location
is
from
the
cable
side
of
the
chassis.
v
Blade
assemblies
are
numbered
from
1—10,
from
left
to
right.
v
Ports
are
numbered
from
0—15,
from
bottom
to
top.
v
Power
supplies
are
numbered
from
1—4,
from
bottom
to
top.
v
Blowers
are
numbered
from
1—3,
from
left
to
right.
Rack
mounting
The
mechanical
design
of
the
M12
and
M14
allows
rack
mounting
with
either
the
cable
side
or
the
noncable
side
facing
the
front
of
the
equipment
rack.
The
chassis
fits
into
a
standard
19-inch
EIA
rack.
Each
chassis
measures:
v
43.74
cm
(17.22
in.)
wide
v
70.87
cm
(27.9
in.)
deep
(without
the
door)
v
61.24
cm
(24.11
in.)
high
(less
than
14U)
Cooling
system
The
M12
and
M14
use
a
redundant
system
of
three
hot-swappable
blowers.
Cool
air
intake
is
from
the
noncable
side
of
the
chassis,
is
pressurized,
and
is
forced
through
the
system.
Heated
air
exits
at
the
top
of
the
cable
side
of
the
chassis.
The
unit
is
cooled
by
three
blowers
that
are
used
in
conjunction
with
a
pressurized
plenum.
Each
blower
assembly
includes
a
blower
control
assembly,
which
provides
the
following
features:
v
Blower
status
LEDs
v
Blower
speed
sensing
v
Blower
speed
control
v
Serial
electronically
erasable
programmable
read
only
memory
(EEPROM)
that
contains
the
part
number,
revision
level,
and
error
logs
for
the
blade
assembly
v
Inlet
air
temperature
monitoring
8
IBM
TotalStorage
SAN
Switch:
2109
Model
M12
and
Model
M14
User’s
Guide
Содержание TotalStorage 2109 M12
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