Alaxala AX2500S, Руководство по устранению неисправностей

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3 Troubleshooting Functional Failures During Operation
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(1) Checking the log
One probable cause of disabled communication is a line failure (or damage). To display the
messages that indicate a hardware failure, carry out the procedure below. You can find
these messages in the log displayed by the Switch.
For details about the contents of the log, see Message and Log Reference .
1. Log in to the Switch.
2. Use the show logging operation command to display the log.
3. Each entry in the log indicates the date and time that a failure occurred. Check
whether a log entry was displayed for the date and time when communication was
disabled.
4. For details about the failure and corrective action for the log entry described above,
see
Message and Log Reference , and follow the instructions given in the manual.
5. If a log entry was not displayed for the date and time when communication was
disabled, see
(2) Checking the interface status .
(2) Checking the interface status
Even when the Switch hardware is operating normally, a fault could have occurred on the
hardware of a neighboring device connected to the Switch.
To check the status of the interface between the Switch and the neighboring device, do the
following:
1. Log in to the Switch.
2. Use the show ip interface operation command to check whether the status of the
interface with the target neighboring device is
Up
or
Down
.
3. If the status of the target interface is Down , see 3.4 Network interface communication
failures .
4. If the status of the target interface is Up , see (3)Identifying the range for a failure
(from the Switch) .
(3) Identifying the range for a failure (from the Switch)
If a failure has not occurred on the Switch, a failure might have occurred somewhere on the
route between the Switch and the remote devices. To identify the range for a failure in order
to determine the fault location on the route, do the following:
1. Log in to the Switch.
2. Use the ping operation command to check the communication with the two remote
devices that are unable to communicate. For details about examples of using the
ping operation command and how to interpret the execution result, see the
Configuration Guides .
3. If communication with the remote devices cannot be verified by the
ping
operation
command, execute the command again to check communication with each of the
devices up to the remote device, beginning with the device closest to the Switch.
4. If the execution result of the ping operation command indicates that the failure
occurred on a neighboring device, see
(5) Checking the ARP resolution information
with a neighboring device . If the execution result indicates a failure on the remote
device, see (6) Checking the unicast routing information .