v
Ethernet
activity
LEDs:
When
these
LEDs
are
lit,
they
indicate
that
the
server
is
transmitting
to
or
receiving
signals
from
the
Ethernet
LAN
that
is
connected
to
the
Ethernet
port.
See
“Connecting
the
cables”
on
page
46
for
the
LED
location.
v
Ethernet
link
LEDs:
When
these
LEDs
are
lit,
they
indicate
that
there
is
an
active
link
connection
on
the
10BASE-T,
100BASE-TX,
or
1000BASE-TX
interface
for
the
Ethernet
port.
See
“Connecting
the
cables”
on
page
46
for
the
LED
location.
v
Ethernet
connectors:
Use
either
of
these
connectors
to
connect
the
server
to
a
network.
Server
power
features
When
the
server
is
connected
to
an
ac
power
source
but
is
not
turned
on,
the
operating
system
does
not
run,
and
all
core
logic
except
for
the
service
processor
(the
baseboard
management
controller
or
optional
Remote
Supervisor
Adapter
II
SlimLine)
is
shutdown;
however,
the
server
can
respond
to
requests
from
the
service
processor,
such
as
a
remote
request
to
turn
on
the
server.
The
power-on
LED
flashes
to
indicate
that
the
server
is
connected
to
ac
power
but
is
not
turned
on.
Turning
on
the
server
Approximately
5
seconds
after
the
server
is
connected
to
ac
power,
the
power-control
button
becomes
active,
and
one
or
more
fans
might
start
running
to
provide
cooling
while
the
server
is
connected
to
power.
You
can
turn
on
the
server
and
start
the
operating
system
by
pressing
the
power-control
button.
The
server
can
also
be
turned
on
in
any
of
the
following
ways:
v
If
a
power
failure
occurs
while
the
server
is
turned
on,
the
server
will
restart
automatically
when
power
is
restored.
v
If
you
installed
an
optional
Remote
Supervisor
Adapter
II
SlimLine,
the
server
can
be
turned
on
from
the
Remote
Supervisor
Adapter
II
SlimLine
user
interface.
v
If
your
operating
system
supports
the
Wake
on
LAN
feature,
the
Wake
on
LAN
feature
can
turn
on
the
server.
Note:
When
4
GB
or
more
of
memory
(physical
or
logical)
is
installed,
some
memory
is
reserved
for
various
system
resources
and
is
unavailable
to
the
operating
system.
The
amount
of
memory
that
is
reserved
for
system
resources
depends
on
the
operating
system,
the
configuration
of
the
server,
and
the
configured
PCI
options.
Turning
off
the
server
When
you
turn
off
the
server
and
leave
it
connected
to
ac
power,
the
server
can
respond
to
requests
from
the
service
processor,
such
as
a
remote
request
to
turn
on
the
server.
While
the
server
remains
connected
to
ac
power,
one
or
more
fans
might
continue
to
run.
To
remove
all
power
from
the
server,
you
must
disconnect
it
from
the
power
source.
Some
operating
systems
require
an
orderly
shutdown
before
you
turn
off
the
server.
See
your
operating-system
documentation
for
information
about
shutting
down
the
operating
system.
14
IBM
System
x3550
Type
7978:
User’s
Guide
Summary of Contents for 79788BU
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