Connecting
secondary
interface
cables
This
section
is
applicable
to
(direct)
out-of-band
management
configurations
only.
If
your
configuration
uses
host-agent
(in-band)
management,
skip
this
section.
Use
the
Ethernet
interface
ports
on
the
back
of
the
storage
subsystem
to
connect
the
controllers
for
direct
management
of
the
storage
subsystems
(see
Important:
1.
The
serial
interface
ports
are
intended
to
be
used
by
service
technicians
to
perform
diagnostic
operations
on
the
storage
subsystem.
Incorrect
use
of
the
serial
port
can
result
in
loss
of
data
access
and,
in
some
cases,
in
loss
of
data.
Do
not
make
connections
to
the
serial
port
unless
you
do
so
under
the
direct
supervision
and
guidance
of
IBM
support
personnel.
2.
To
minimize
security
risks,
do
not
connect
the
DS4800
in
a
public
LAN
or
public
subnet.
Use
a
local
private
network
for
the
DS4800
and
the
management
station
Ethernet
ports.
3.
To
ensure
proper
EMI
shielding,
always
use
quality
braided
and
shielded
serial
cables.
Connect
a
pair
of
Ethernet
cables
from
the
storage-management
station
to
the
Ethernet
ports
for
Controller
A
(located
on
the
top)
and
Controller
B
(located
on
the
bottom)
on
the
back
of
the
storage
subsystem.
shows
the
location
of
the
ports.
Only
one
Ethernet
port
connection
from
each
controller
is
required
to
establish
a
direct
(out-of-band)
management
connection
to
the
DS4800
Storage
Subsystem.
Note:
The
alignment
of
the
Ethernet
and
serial
ports
on
controller
A
are
opposite
those
of
controller
B.
Before
inserting
an
Ethernet
or
serial
cable,
verify
that
the
cable
connection
is
rotated
correctly
to
match
the
alignment
of
the
port
on
the
RAID
controller.
Do
not
force-fit.
RS-232
serial port
Ethernet ports
RS-232
serial port
Ethernet ports
Controller B
Controller A
ds48033
Figure
60.
Ethernet
and
serial
port
locations
Chapter
3.
Cabling
the
storage
subsystem
81
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