PRTG Manual: SNMP Custom Advanced Sensor
The SNMP Custom Advanced sensor monitors numeric values returned for object identifiers (OID) via the Simple Network Management Protocol (SNMP).
The SNMP Library sensor automatically creates SNMP Custom Advanced sensors when the Management Information Base (MIB) file that you import contains single values.
For a detailed list and descriptions of the channels that this sensor can show, see section Channel List.
- Dutch: SNMP Aanpasbaar Geavanceerd
- French: SNMP personnalisé avancé
- German: SNMP (Benutzerdef. erweitert)
- Japanese: SNMP カスタムアドバンスト
- Portuguese: SNMP (customizado / avançado)
- Russian: Дополнительные пользовательские параметры SNMP
- Simplified Chinese: SNMP 自定义高级
- Spanish: SNMP (personalizado / avanzado)
- This sensor supports IPv6.
- This sensor has a low performance impact.
- This sensor can use lookups. Select Lookup as Channel #x Unit and define the lookup file in Channel #x Lookup.
- It might not work to query data from a probe device via SNMP (querying localhost, 127.0.0.1, or ::1). Add this device with the IP address that it has in your network and create the sensor on this device instead.
- Knowledge Base: How do I find out which OID I need for an SNMP Custom sensor?
Setting |
Description |
---|---|
Sensor Name |
Enter a name to identify the sensor. By default, PRTG shows this name in the device tree, as well as in alarms, logs, notifications, reports, maps, libraries, and tickets.
|
Parent Tags |
The tags that the sensor inherits from its parent device, parent group, and parent probe.
|
Tags |
Enter one or more tags. Confirm each tag with the Spacebar key, a comma, or the Enter key. You can use tags to group objects and use tag-filtered views later on. Tags are not case-sensitive. Tags are automatically inherited.
The sensor has the following default tags that are automatically predefined in the sensor's settings when you add the sensor:
|
Priority |
Select a priority for the sensor. This setting determines the position of the sensor in lists. The highest priority is at the top of a list. Choose from the lowest priority ( |
Setting |
Description |
---|---|
Channel #x Name |
Enter a name for the channel in which the sensor shows the results at the OID. Enter a string. |
Channel #x OID |
Enter the OID of the SNMP object from which you want to receive numeric data.
|
Channel #x Value Type |
Select the expected numeric type of the results at the OID:
|
Channel #x Unit |
Define the unit of the numeric data that this sensor receives from the OID:
|
Channel #x Custom Unit |
This setting is only visible if you select Custom above. Define a unit for the channel value. Enter a string. |
Channel #x Lookup |
This setting is only visible if you select Lookup above. Select a lookup file that you want to use with this channel. |
Channel #2 - #10 |
You can define up to 10 channels. You must define at least one channel, so you see all available settings for Channel #1. Specify how to handle all other possible channels:
|
Setting |
Description |
---|---|
Primary Channel |
Select a channel from the list to define it as the primary channel. In the device tree, the last value of the primary channel is always displayed below the sensor's name. The available options depend on what channels are available for this sensor.
|
Graph Type |
Define how different channels are shown for this sensor:
|
Stack Unit |
This setting is only visible if you select Stack channels on top of each other above. Select a unit from the list. All channels with this unit are stacked 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. |
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.
For more information, see section Root Group Settings, section Scanning Interval.
Schedules, Dependencies, and Maintenance Window
You cannot interrupt the inheritance for schedules, dependencies, and maintenance windows. The corresponding settings from the parent objects are always active. However, you can define additional schedules, dependencies, and maintenance windows. They are active at the same time as the parent objects' settings.
For more information, see section Root Group Settings, section Schedules, Dependencies, and Maintenance Window.
For more information, see section Root Group Settings, section Access Rights.
Which channels the sensor actually shows might depend on the target device, the available components, and the sensor setup.
Channel |
Description |
---|---|
Downtime |
In the channel table on the Overview tab, this channel never shows any values. PRTG uses this channel in graphs and reports to show the amount of time in which the sensor was in the Down status |
[Value] |
The numeric value for a specified OID (up to 10 OIDs are possible) that refers to a specific SNMP device |
KNOWLEDGE BASE
How do I find out which OID I need for an SNMP Custom sensor?
What security features does PRTG include?
My SNMP sensors don’t work. What can I do?