Metrodata MetroLAN-1000, Подробное краткое руководство по эксплуатации

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FAULT FINDING
23 76-02-059A
5 FAULT FINDING
Following initial configuration all may be well and all traffic is passing error free. However,
in many cases it is possible that there may be problems. This section gives a quick overview
of how to go about diagnosing where the problem may lie.
5. 1 Top Level Alarm Summary
To give an immediate indication of the current operational state of the MetroLAN a summary
alarm indication is shown in the top right corner of every menu in the user interface.
The top line of the display shows:
If any alarms exist in the system the display will change to show either:
Alarms : Minor
Alarms : Major
If there are either major or minor alarms present, then further investigation is required using
either the global status overview, or the performance monitoring screens.
5. 2 Global Status Overview
When the MetroLAN is experiencing problems the first place to look to get an overview of
where the problems are is the Global Status Display. This is accessed from the MAIN SET-
UP menu and gives an overview of every port and tributary on a single screen. For full details
of this screen please refer to the MetroLAN user Manual.
The Global Status shows both current alarms and historical alarms. Current alarms are
shown in capitals, e.g. LOS and this means that the alarm is currently active. Historical
alarms are shown in lower case, e.g. los, and means that some time in the past an alarm
occurred. Historical alarms may be cleared by typing
<C> to clear the history.
For each port or tributary a single alarm will be displayed and in most cases this is the highest
priority alarm for that layer. Often multiple alarms will be active and it will be necessary to
view the physical layer statistics for that particular port or tributary to identify all active
alarms.
5. 3 Performance Data
The performance data screens provide complete status for each physical port or tributary
within the system. The display will maintain a count of errored seconds for each alarm and
also provides a display of all currently active alarms.
The temporary count column may be cleared without affecting the main 24 hour performance
statistics to make the current network state clearer.
Metrodata MetroLAN: Local connection to "[nodename]"
Alarms: none