Alaxala AX2500S, Troubleshooting Manual

Page: 52 / 136

3 Troubleshooting Functional Failures During Operation
26
No. Items to check Cause Action
Check whether the cables are connected correctly. 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 the
Configuration Guides .
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
operation
command, and take the action described in Action . For
the test types to be specified, see 5.1 Testing a line .
2 Use the
show
interfaces
operation
command to display the
receive-error statistics,
and check whether there
is a count for the item
shown below for the
target line. If there is a
count, see the
Cause and
Action columns.

CRC errors

Symbol errors
Line quality is
degraded. Check the cable type. For the cable types, see the
Hardware Instruction Manual .
If the Switch is set as follows, make sure that the pin
mapping is for MDI-X:

A fixed connection is set for the target port.

Auto-negotiation is enabled and the automatic MDIX
functionality is disabled for the target port.
Check the cable length. For the cable length, see the
Hardware Instruction Manual .
Check whether the cables are connected correctly. 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 the
Configuration Guides .
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
operation
command, and take the action described in Action . For
the test types to be specified, see 5.1 Testing a line .
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.
Other than the
above To use a specific speed in auto-negotiation, set the line
speed for auto-negotiation. For details, see the
Configuration Guides .