Token Ring Alarms

NOTE

When the Alarm Limits window is invoked, the Station Errors fields do not present any values. This is because it is possible that station-level alarm limits have been set at individual stations (via the Station Alarm Limits window) that may differ from those set at other individual stations or at the ring level. Refer to the Station Alarm Limits windows for individual stations to view their current station-level alarm limits.

The following thresholds, listed in the section of the window labeled Station Errors, are based on the number of occurrences of the selected event detected by the station within a user-defined time interval.

Line

The threshold of line errors detected by the selected

 

station port. These indicate a non-data bit between the

 

starting and ending delimiters of data, or an FCS error.

 

The default value is 2.

Internal

The threshold of recoverable internal errors detected by

 

the selected port, indicating that the Network Interface

 

Card of its attached station may be in marginal operating

 

condition. The default value is 1.

Burst

The threshold of burst errors detected by the selected

 

station port. These signify a bit information-encoding

 

error (no transitions between 0 and 1 over five half-bit

 

times). The default value is 10.

A.C.

The threshold of frames detected by the selected station

 

port that contain errors in the A or C bits. The default

 

value is 2.

Rx Congestion

The threshold at which the port cannot copy a frame

 

addressed to it because of a lack of internal buffering.

 

The default value is 124.

Setting Ring-Level Alarm Limits

To set an alarm:

1.If you wish to alter the default threshold values, place the text cursor into the desired alarm event field, and type in the threshold value.

2.To enable an alarm, click on the checkbox next to the desired alarm event field. An X in the checkbox indicates that the alarm is enabled.

3.Click on the clock icon next to the Within: field. A New Alarm Timebase text box will appear. In this text box, you enter the time interval for the specified number of events to occur before the alarm is activated.

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Ring-Level Alarm Limits

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Enterasys Networks MicroMMAC-T manual Setting Ring-Level Alarm Limits, Line