Troubleshooting guide

3. Troubleshooting Functional Failures During Operation
38
3.5.4 Actions to be taken for 100BASE-FX/1000BASE-X problems
If a 100BASE-FX/1000BASE-X problem occurs, use the procedure below to isolate the failure.
Perform a line test on the Switch and make sure that the
functionality of the receiving side has no problem. Check the
results of the
no test interfaces command, and take the
action described in Action. For the test types to be specified, see
6.1 Testing a line.
3Use the
show
interfaces command
to display the failure
statistics, and check
whether there is a count
for the following item for
the target port. If there is
a count, see the Cause
and Action columns.
• MDI cross over
changed
The pin mapping
of the cable is not
correct.
Modify the pin mapping correctly. For details about the pin
mapping, see the Configuration Guide.
4 Execute the
show
interfaces command
and check the line type
and line speed in the
detail information
displayed for the target
port. If the line type or
speed is invalid, see the
Cause and Action
columns.
The cable is not
compatible.
Check whether the cable types are correct. For the types, see the
Hardware Instruction Manual.
The values
specified for the
speed and
duplex
configuration
commands are
different from
those on the
remote device.
For the
speed and duplex configuration commands, specify
the same values that are on the remote device.
Other than the
above
To use a specific speed in auto-negotiation, set the line speed
for auto-negotiation. For details, see the Configuration Guide.
5Use the
show
interfaces command
to display the failure
statistics, and check
whether there is a count
for the following item for
the target port. If there is
a count, see the Cause
and Action columns.
• Long frames
Packets
exceeding the
maximum
allowed frame
length are
received.
Adjust the jumbo frame settings to those on the remote device.
6Use the
show qos
queueing command to
check whether there is a
count for the following
item. If there is a count,
see the Cause and Action
columns.
• discard_pkt
Packets are
discarded.
Check whether drop control and the shaper are being used
appropriately in the system configuration.
No. Items to check Cause Action