Troubleshooting guide

3. Troubleshooting Functional Failures During Operation
26
No. Items to check Cause Action
the Cause and Action
columns.
 Link down
Replace with the connection interface supported by the
Switch. For the connection interfaces supported by the
Switch, see the Hardware Instruction Manual and
Configuration Guides.
2 Use the show
interfaces
operation command to
display the
receive-error statistics,
and check whether
there is a count for the
following items for the
target line: If there is a
count, see the Cause
and Action columns.
 CRC errors
 Symbol errors
Check the cable type. For the cable types, see the
Hardware Instruction Manual.
Check the cable length. For the cable length, see the
Hardware Instruction Manual.
Check whether the cables are connected correctly (for
example, check for incomplete insertion). For cable
connections, see the Hardware Instruction Manual.
Replace with the connection interface supported by the
Switch. For the connection interfaces supported by the
Switch, see the Hardware Instruction Manual and
Configuration Guides.
3 Use the show
interfaces
operation command to
check the line type and
line speed on the
target line. If the line
type or speed is
invalid, see the Cause
and Action columns.
The cable is not
compatible.
Check the cable type. For the cable 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.
3.4.3 Actions to be taken for 10BASE-T/100BASE-TX/1000BASE-T problems
If a 10BASE-T/100BASE-TX/1000BASE-T problem occurs, use the following procedure to
isolate the failure:
1. Viewing logged data
For details about the information in the operation log, see the Message Log
Reference.
2. Isolating the cause of the problem according to the failure analysis method
Isolate the cause of the problem according to the failure analysis method described
in the following table.
Table 3-12 Failure analysis method for 10BASE-T/100BASE-TX/1000BASE-T problems
No. Items to check Cause Action
1 Use the show
interfaces
operation command to
display the failure
statistics, and check
Line quality is degraded. Check the cable type. For the cable types, see
the Hardware Instruction Manual.
Check the cable length. For the cable length,
see the Hardware Instruction Manual.