Instruction Manual

17
Appendix A Troubleshooting
Network Connection
Troubleshooting
■ Checking Basic Network Operation
with a Ping Test
The network connection may be checked by performing
a ping test. For more details on how to perform a ping
test, refer to "Chapter 4 Checking the Network
Connection" (page 15).
Check the ping results, and try the following:
■ Details
Communication with the device that is specified as the
ping target is unavailable.
■ Action
z The setting of the ping target may be invalid. Check
that the ping target IP address, host name, or FQDN
is correct.
z The network transmission mode may differ from the
connection target. On the [Network Status] window,
change [Link speed / Duplex mode] from [Auto-
Negotiation] to a fixed mode. This can be changed as
follows:
1. Select [Network Settings] J [Basic] J [Network
Status].
DThe [Network Status] window appears.
2. Select a fixed link speed/duplex mode for [Link
Speed/Duplex Mode].
3. Press the [OK] button.
z If there are no problems with the ping target setting
and the network transmission mode, refer to "Failure
to Connect to a Server Using Its IP Address" (page
18) for further solutions.
■ Details
Communication with the device specified as the ping
target is unstable.
■ Action
z There may be a quality problem with the LAN cable.
Replace the LAN cable and try again.
z The network transmission mode may differ from the
connection target. On the [Network Status] window,
change [Link speed / Duplex mode] from [Auto-
Negotiation] to a fixed mode. This can be changed as
follows:
1. Select [Network Settings] J [Basic] J [Network
Status].
DThe [Network Status] window appears.
2. Select a fixed link speed/duplex mode for [Link
Speed/Duplex Mode].
3. Press the [OK] button.
■ Details
There may be problems in the hardware transmission
path. For example, the LAN cable may have become
disconnected during the ping test.
■ Action
Check the status of the LAN cable and try again.
■ Details
The name-resolution or address-resolution for the
device specified as the ping target may have failed.
■ Action
z Check that the ping target host name or FQDN is
correct.
z Check that the DNS server or WINS server settings
are correct.
z If the ping target host name or FQDN is correct, refer
to "Failure to Connect to a Server Using Its Host
Name or FQDN" (page 19) for further solutions.
[Ping statistics] shows
"Lost=4 (100% loss)"
[Ping statistics] shows
"Lost=N (1 to 99% loss)"
"Hardware error"
"Ping request could not find host
xxxxxxxxx. Please check the name and
try again."