10
Step
3c:
LAN
communication
problem.
If
the
panic
messages
indicates
a
problem
with
LAN
comm
unication
(suc
h
as
when
a
diskless
cluster
clien
t
no de
is
prev
en
ted
from
comm
unication
for
to
o
long),
c
hec
k
all
LAN
cable
connections
to
b e
sure
of
the
following:
All
connectors
are
tightly
fastened
to
the
LAN
cable
and
the
media
access
units
(MAU's).
If
y
ou
are
using
\thick
LAN,"
make
sure
all
taps
are
tightly
connected
to
their
resp ectiv
e
cables
and
that
A
UI
cables
are
connected
securely
to
the
LAN
in
terface
cards
(LANICs)
in
y
our
computer.
Y
our
LAN
is
prop erly
terminated.
Eac
h
END
of
the
LAN
cable
MUST
ha
v
e
a
50
ohm
terminator
on
it.
Do
NOT
connect
a
computer
directly
to
the
END
of
a
LAN
cable.
Pro
ceed
to
step
4
(reb o oting
y
our
system).
Step
3d:
Reco
v
ery
from
other
situations.
When
y
ou
susp ect
the
problem
w
as
something
other
than
the
ab o
v
e
(or
when
y
ou
do
not
kno
w
where
to
classify
it),
pro ceed
to
step
4
\ R
eb
o
oting
your
system
."
In
this
case,
it
is
esp
e
cial
ly
imp ortant
that
y
ou
write
do
wn
the
exact
text
of
the
panic
message,
just
in
case
y
ou
need
it
for
future
troublesho
oting.
Step
4:
Rebooting
y
our
system.
Once
y
ou
ha
v
e
c
hec
k
ed
for
and
corrected
an
y
problems
from
Step
3,
y
ou
are
ready
to
reb o ot
y
our
system.
Y
ou
can
reb o ot
y
our
system
using
the
reset
button
on
the
bac
k
of
the
computer.
Otherwise,
y
ou
can
turn
y
our
computer
o
and
then
bac
k
on
to
initiate
the
b o ot
sequence.
Y
ou
will
probably
notice
a
few
dierences
in
b o ot
b eha
vior
as
compared
with
y
our
normal
b o ot
sequence.
Y
our
computer
might
sa
v
e
a
\core"
le
to
disk.
This
core
le
is
a
\snapshot"
of
the
previously
running
k
ernel
at
the
time
that
it
panic
k
ed.
If
it
b ecomes
necessary
,
this
core
le
can
b e
analyzed
using
sp ecial
to
ols
to
determine
more
ab out
what
caused
the
panic.
Note
Core
les
are
quite
large
and
are
sa
v
ed
to
the
directory
/tmp/syscore
.
If
y
ou
feel
y
ou
need
to
sa
v
e
these
les
for
future
analysis
(something
that
isn't
usually
required),
it
is
b est
to
sa
v
e
them
to
tap
e
and
remov
e
them
from
y
our
le
system
in
order
to
free
up
space.
If
y
ou
know
wh
y
y
our
system
panic
k
ed,
y
ou
can
delete
the
core
les;
it
is
unnecessary
to
k
eep
them.
The
core
les
are
used
in
rare
circumstances
to
diagnose
hard-to-nd
causes
of
system
panics.
10-18
Dealing
with
Problems
Summary of Contents for 425s
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