Alaxala AX2500S, Руководство по устранению неисправностей

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3 Troubleshooting Functional Failures During Operation
27
No. Items to check Cause Action
4 Use the
show
interfaces
operation
command to display the
failure statistics, and
check whether there is a
count for the item shown
below 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.
3.4.3 Actions to be taken for 100BASE-FX [24S4X]/1000BASE-X problems
If a 100BASE-FX [24S4X]/1000BASE-X problem occurs, use the procedure below to
isolate the failure.
1. Viewing logged data
For details about the information in the operation log, see Message and 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 3-8 Failure analysis method for 100BASE-FX [24S4X]/1000BASE-X problems
No. Items to check Cause Action
1 Use the
show
interfaces
operation
command to display the
failure 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.

Link down
Line quality on
the receiving
side is
degraded. Check the type of the optical fiber.
If an optical attenuator is used, check the attenuation
value.
Check the cable length. For the cable length, see the
Hardware Instruction Manual .
Check whether the cable is connected correctly (for
example, check for incomplete insertion). For cable
connections, see the
Hardware Instruction Manual .
Make sure that the end sections of the cables are clean.
If they are dirty, clean them.
Check whether the transceiver (SFP) is connected
correctly (for example, check for incomplete insertion).
Comply with the segment standard of the remote device.
Check whether the optical level is correct.
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 .