PRTG Manual: SNMP Custom Sensor

The SNMP Custom sensor monitors a single parameter that is returned by a specific object identifier (OID) via the Simple Network Management Protocol (SNMP).

SNMP Custom Sensor

For a detailed list and descriptions of the channels that this sensor can show, see section Channel List .

Sensor in Other Languages

Remarks

Consider the following remarks and requirements for this sensor:

Remark

Description

Channel Name

Enter a name for the channel in which the sensor shows the results for the OID. Enter a string.

You can change this value later in the channel settings of this sensor.

Unit String

Enter the unit for the values that this sensor returns. Enter a string.

PRTG uses the unit string for display purposes and shows it in graphs, data tables, and gauges.

You can change this value later in the channel settings of this sensor.

Basic Sensor Settings

Basic Sensor Settings

The sensor has the following default tags that are automatically predefined in the sensor's settings when you add the sensor:

For more information about basic sensor settings, see section Sensor Settings .

OID Settings

OID Settings

Setting

Description

Select the expected numeric type of the results at the OID:

This mode only works if the difference between the last and the current value is positive and increases with each scanning interval. This mode does not support negative values and decreasing values.

You cannot change this value after sensor creation.

Multiplication

If you want to multiply the received data with a certain value, enter the multiplier. Use the default value 1 to not change the received value. Enter an integer.

Division

If you want to divide the received data by a certain value, enter the divisor. Use the default value 1 to not change the received value. Enter an integer.

If Value Changes

Define what the sensor does when its value changes:

Trigger 'change' notification : Send an internal message that indicates a change.
In combination with a change trigger , you can use this to trigger a notification if a change occurs.

Primary Channel

Select a channel from the list to define it as the primary channel. In the device tree, PRTG displays the last value of the primary channel below the sensor's name. The available options depend on what channels are available for this sensor.

You can set a different primary channel later by clicking below a channel gauge on the sensor's Overview tab.

Graph Type

Define how this sensor shows different channels:

Stack channels on top of each other : Stack channels on top of each other to create a multi-channel graph. This generates a graph that visualizes the different components of your total traffic.
You cannot use this option in combination with manual Vertical Axis Scaling (available in the channel settings ).

Stack Unit

This setting is only visible if you select Stack channels on top of each other above.

Select a unit from the list. PRTG stacks all channels with this unit on top of each other. By default, you cannot exclude single channels from stacking if they use the selected unit. However, there is an advanced procedure to do so.

Inherited Settings

By default, all of these settings are inherited from objects that are higher in the hierarchy. We recommend that you change them centrally in the root group settings if necessary. To change a setting for this object only, click under the corresponding setting name to disable the inheritance and to display its options.

For more information, see section Inheritance of Settings .

Channel List

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SNMP Custom sensor and SNMP Custom Library sensor

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