Black Box ServSensor JR EME102A, Руководство пользователя, Страница: 57 / 135

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CONTENTS
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3.1.4 P
OLLING
SNMP, T
HRESHOLDS AND
A
LARM
NNM can read the Status field to determine if any of the sensors has a
problem. Polling is the most effective method of monitoring because if
network connectivity is lost, polling will reveal this failure. While the
ServSensor JR does send traps there is no guarantee that a trap will be
delivered to the monitoring station.
The network traffic generated by polling is very limited. The
temperature sensor need only be read once every five minutes or more
depending on your needs.
Setting Up Polling
To setup polling go to the NNM toolbar and enter Options/Data
Collection & Thresholds: SNMP
The dialog box appears. Enter Edit/MIB Object/New
The dialog to pick the OID to monitor appears. Click on the + to
expand the private tree. Then expand enterprises/BLACK
BOX/hhmsagent. This exposes the
hhmsagent mib.
You can monitor the status of an individual sensor by choosing the
status OID for that sensor.
A second dialog appears allowing you to further refine the details of
what you wish to poll. Enter the IP Address of the ServSensor JR in the
Source field. Press Add to add that data source to the list of nodes to be
monitored.
Next you can change the polling interval. For now we will enter 5s.
This will cause the node to be polled every 5 seconds. This is to often
for a working environment. However it will help to test the
hhmsagent
if we poll more often. Once testing is complete we can set the polling
to a larger interval.
Set the Threshold Parameters to >= 3. This means that we will cause an
alarm to be triggered whenever the status is greater than or equal to 3.