<%NUMBERING1%>.<%NUMBERING2%>.<%NUMBERING3%> PRTG Manual: SNMP Uptime v2 Sensor

The SNMP Uptime v2 sensor monitors the uptime of a device via the Simple Network Management Protocol (SNMP).

SNMP Uptime v2 Sensor

SNMP Uptime v2 Sensor

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

Sensor in Other Languages

  • Dutch: SNMP Uptime v2
  • French: Disponibilité v2 (SNMP)
  • German: SNMP Laufzeit v2
  • Japanese: SNMP アップタイム v2
  • Portuguese: Tempo de atividade (SNMP) v2
  • Russian: SNMP Uptime v2
  • Simplified Chinese: SNMP 正常运行时间版本 2
  • Spanish: Tiempo de actividad (SNMP) v2


Consider the following remarks and requirements for this sensor:




  • This sensor requires credentials for SNMP in settings that are higher in the object hierarchy.


  • This sensor supports IPv6.

Performance impact

  • This sensor has a very low performance impact.

Scanning interval

  • The minimum scanning interval of this sensor is 1 minute.
  • The recommended scanning interval of this sensor is 1 minute.

Multi-platform probe

  • You can add this sensor to a multi-platform probe.

Basic Sensor Settings

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:

  • snmp
  • snmpuptimesensor
  • uptime
  • uptimesensor

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

SNMP Uptime Specific

SNMP Uptime Specific

SNMP Uptime Specific



Data Source

Select the object identifier (OID) the sensor gets its uptime from:

  • Automatic (default): Use HOST-RESOURCES-V2-MIB::hrSystemUptime and fall back to SNMPv2-MIB::sysUpTime.
  • Use HOST-RESOURCES-V2-MIB::hrSystemUptime: Use HOST-RESCOURCES-V2-MIB::hrSystemUptime.
  • Use SNMPv2-MIB::sysUpTime: Use SNMPv2-MIB::sysUpTime.
  • Use SNMP-FRAMEWORK-MIB::snmpEngineTime: Use SNMP-FRAMEWORK-MIB::snmpEngineTime.

Sensor Display

Sensor Display

Sensor Display



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.

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

Graph Type

Define how this sensor shows different channels:

  • Show channels independently (default): Show a graph for each channel.
  • 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.
    i_round_redYou 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.

Debug Options

Debug Options

Debug Options



Result Handling

Define what PRTG does with the sensor result:

  • Discard result: Do not store the sensor result.
  • Store result: Store the last sensor result in the \Logs\sensors subfolder of the PRTG data directory on the probe system. The file name is Result of Sensor [ID].log. This setting is for debugging purposes. PRTG overwrites this file with each scanning interval.

i_round_redIf you select Store result, the sensor writes the standard error (stderr) streams in clear text to the last sensor result file. Do not return sensitive information via the scripts that you run with this sensor.

i_round_blueIn a cluster, PRTG stores the result in the PRTG data directory of the master node.

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 b_inherited_enabled under the corresponding setting name to disable the inheritance and to display its options.

i_square_cyanFor more information, see section Inheritance of Settings.

Channel List

i_round_blueWhich channels the sensor actually shows might depend on the target device, the available components, and the sensor setup.




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

System Uptime

The uptime

i_round_blueThis channel is the primary channel by default.


i_square_blueKNOWLEDGE BASE

Why does the SNMP System Uptime sensor report wrong values?

What security features does PRTG include?