Configuring rmon alarms – LevelOne GTL-2691 User Manual

Page 454

HAPTER

| Basic Administration Protocols

Remote Monitoring

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a trap message to the management agent which can then respond to the

event if so configured.

ONFIGURING

RMON

LARMS

Use the Administration > RMON (Configure Global - Add - Alarm) page to

define specific criteria that will generate response events. Alarms can be

set to test data over any specified time interval, and can monitor absolute

or changing values (such as a statistical counter reaching a specific value,

or a statistic changing by a certain amount over the set interval). Alarms

can be set to respond to rising or falling thresholds. (However, note that

after an alarm is triggered it will not be triggered again until the statistical

value crosses the opposite bounding threshold and then back across the

trigger threshold.

CLI R

EFERENCES

◆

"Remote Monitoring Commands" on page 847

OMMAND

SAGE

◆

If an alarm is already defined for an index, the entry must be deleted

before any changes can be made.

ARAMETERS

These parameters are displayed:

◆

Index – Index to this entry. (Range: 1-65535)

◆

Status – The status of this alarm entry. (Displayed data includes:

Valid, createRequest, underCreation, or Invalid)

◆

Variable – The object identifier of the MIB variable to be sampled.

Only variables of the type etherStatsEntry.n.n may be sampled.
Note that etherStatsEntry.n uniquely defines the MIB variable, and

etherStatsEntry.n.n defines the MIB variable, plus the etherStatsIndex.

For example, 1.3.6.1.2.1.16.1.1.1.6.1 denotes

etherStatsBroadcastPkts, plus the etherStatsIndex of 1.

◆

Interval – The polling interval. (Range: 1-31622400 seconds)

◆

Sample Type – Tests for absolute or relative changes in the specified

variable.

■

Absolute – The variable is compared directly to the thresholds at

the end of the sampling period.

■

Delta – The last sample is subtracted from the current value and

the difference is then compared to the thresholds.

◆

Rising Threshold – If the current value is greater than or equal to the

rising threshold, and the last sample value was less than this threshold,

then an alarm will be generated. After a rising event has been

generated, another such event will not be generated until the sampled

value has fallen below the rising threshold, reaches the falling