IBM 8479 Hardware Maintenance Manual - Page 26

Ethernet, controller, troubleshooting, chart

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If you set the Ethernet controller to operate at 100 MBps, you must use Category 5 cabling. If you directly connect two workstations (without a hub), or if you are not using a hub with X ports, use a crossover cable. Note: To determine whether a hub has an X port, check the port label. If the label contains an X, the hub has an X port. v Determine if the hub supports auto-negotiation. If not, try configuring the integrated Ethernet controller manually to match the speed and duplex mode of the hub. v Check the LAN activity light (if available) on the front of the server. The LAN activity light illuminates when the Ethernet controller sends or receives data over the Ethernet network. If the LAN activity light is off, make sure that the hub and network are operating and that the correct device drivers are loaded. v Make sure that you are using the correct device drivers, supplied with the server. v Check for operating server-specific causes for the problem. v Make sure that the device drivers on the client and server are using the same protocol. v Test the Ethernet controller. The way you test the Ethernet controller depends on which operating system you are using (see the Ethernet controller device driver README file). Ethernet controller troubleshooting chart You can use the following troubleshooting chart to find solutions to 10/100 MBps Ethernet controller problems that have definable symptoms. Table 3. Ethernet troubleshooting chart Ethernet controller problem Suggested Action The server stops running when loading device drivers. The PCI BIOS interrupt settings are incorrect. Check the following: v Determine if the IRQ setting assigned to the Ethernet controller is also assigned to another device in the Configuration/Setup Utility program. Although interrupt sharing is allowed for PCI devices, some devices do not function well when they share an interrupt with a dissimilar PCI device. Try changing the IRQ assigned to the Ethernet controller or the other device. For example, for NetWare Versions 3 and 4 it is recommended that disk controllers not share interrupts with LAN controllers. v Make sure that you are using the most recent device driver available from the World Wide Web. v Run the network diagnostic program. The LAN activity light (when available) does not light. Check the following: v Make sure that you have loaded the network device drivers. v The network might be idle. Try sending data from this workstation. v Run diagnostics on the LEDs. 18 xSeries 200 Type 8479 and xSeries 200VL Type 8481: Hardware Maintenance Manual

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If
you
set
the
Ethernet
controller
to
operate
at
100
MBps,
you
must
use
Category
5
cabling.
If
you
directly
connect
two
workstations
(without
a
hub),
or
if
you
are
not
using
a
hub
with
X
ports,
use
a
crossover
cable.
Note:
To
determine
whether
a
hub
has
an
X
port,
check
the
port
label.
If
the
label
contains
an
X
,
the
hub
has
an
X
port.
v
Determine
if
the
hub
supports
auto-negotiation.
If
not,
try
configuring
the
integrated
Ethernet
controller
manually
to
match
the
speed
and
duplex
mode
of
the
hub.
v
Check
the
LAN
activity
light
(if
available)
on
the
front
of
the
server.
The
LAN
activity
light
illuminates
when
the
Ethernet
controller
sends
or
receives
data
over
the
Ethernet
network.
If
the
LAN
activity
light
is
off,
make
sure
that
the
hub
and
network
are
operating
and
that
the
correct
device
drivers
are
loaded.
v
Make
sure
that
you
are
using
the
correct
device
drivers,
supplied
with
the
server.
v
Check
for
operating
server-specific
causes
for
the
problem.
v
Make
sure
that
the
device
drivers
on
the
client
and
server
are
using
the
same
protocol.
v
Test
the
Ethernet
controller.
The
way
you
test
the
Ethernet
controller
depends
on
which
operating
system
you
are
using
(see
the
Ethernet
controller
device
driver
README
file).
Ethernet
controller
troubleshooting
chart
You
can
use
the
following
troubleshooting
chart
to
find
solutions
to
10/100
MBps
Ethernet
controller
problems
that
have
definable
symptoms.
Table
3.
Ethernet
troubleshooting
chart
Ethernet
controller
problem
Suggested
Action
The
server
stops
running
when
loading
device
drivers.
The
PCI
BIOS
interrupt
settings
are
incorrect.
Check
the
following:
v
Determine
if
the
IRQ
setting
assigned
to
the
Ethernet
controller
is
also
assigned
to
another
device
in
the
Configuration/Setup
Utility
program.
Although
interrupt
sharing
is
allowed
for
PCI
devices,
some
devices
do
not
function
well
when
they
share
an
interrupt
with
a
dissimilar
PCI
device.
Try
changing
the
IRQ
assigned
to
the
Ethernet
controller
or
the
other
device.
For
example,
for
NetWare
Versions
3
and
4
it
is
recommended
that
disk
controllers
not
share
interrupts
with
LAN
controllers.
v
Make
sure
that
you
are
using
the
most
recent
device
driver
available
from
the
World
Wide
Web.
v
Run
the
network
diagnostic
program.
The
LAN
activity
light
(when
available)
does
not
light.
Check
the
following:
v
Make
sure
that
you
have
loaded
the
network
device
drivers.
v
The
network
might
be
idle.
Try
sending
data
from
this
workstation.
v
Run
diagnostics
on
the
LEDs.
18
xSeries
200
Type
8479
and
xSeries
200VL
Type
8481:
Hardware
Maintenance
Manual