PRTG Manual: Ping Sensor

The Ping sensor sends an Internet Control Message Protocol (ICMP) echo request ("Ping") from the probe system to the parent device to monitor its availability.

i_round_blueThe default number of Pings per scanning interval is 5.

Ping Sensor

Ping 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: Ping
  • French: Ping
  • German: Ping
  • Japanese: Ping
  • Portuguese: Ping
  • Russian: Пинг
  • Simplified Chinese: Ping
  • Spanish: Ping

Remarks

Add Sensor

The Add Sensor dialog appears when you manually add a new sensor to a device. It only shows the settings that are required to create the sensor. You can change nearly all settings on the sensor's Settings tab after creation.

Basic Sensor Settings

Click the Settings tab of a sensor to change its settings.

Basic Sensor Settings

Basic Sensor Settings

Setting

Description

Sensor Name

Enter a name to identify the sensor.

Parent Tags

Shows tags that the sensor inherits from its parent device, parent group, and parent probe.

i_round_blueThis setting is for your information only. You cannot change it.

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.

i_round_blueIt is not possible to enter tags with a leading plus (+) or minus (-) sign, nor tags with parentheses (()) or angle brackets (<>).

i_round_blueFor performance reasons, it can take some minutes until you can filter for new tags that you added.

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

  • pingsensor

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 (i_priority_1) to the highest priority (i_priority_5).

i_round_blueUsually, a sensor connects to the IP Address/DNS Name of the parent device. See the device settings for details. For some sensors, you can explicitly define the monitoring target in the sensor settings.

Ping Settings

Ping Settings

Ping Settings

Setting

Description

Timeout (Sec.)

Enter a timeout in seconds for the Ping. If the reply takes longer than this value, PRTG cancels the request and shows an error message. Enter an integer. The maximum timeout value is 300 seconds (5 minutes).

Packet Size (Bytes)

Enter the packet size for the Ping in bytes. You can enter any value between 1 and 10000. Enter an integer.

i_round_blueWe recommend that you use the default value.

Ping Method

Define the kind of Ping check that the sensor performs with each scanning interval:

  • Send one single Ping: Send a single Ping only. The sensor then shows the Ping time only.
    i_round_blueThis setting is useful for monitoring availability.
  • Send multiple Ping requests: Send multiple Pings in a row. The sensor then also shows the minimum and the maximum Ping time as well as the packet loss (in percent). This setting is default.
    i_round_blueThis setting is useful if you want to create reports about average Ping times out of a series of ping requests.
     
    i_round_blueIf you select this setting, all of the Ping requests must be lost for the sensor to show the Down status. For example, if only one Ping request is answered in a series of five, the sensor still shows the Up status.

Ping Count

This setting is only visible if you select Send multiple Ping requests above. Enter the number of Pings that the sensor sends in a row in one scanning interval. Enter an integer. The default value is 5.

Ping Delay (ms)

This setting is only visible if you select Send multiple Ping requests above. Enter the time in milliseconds (ms) that the sensor waits between two Ping requests. Enter an integer. The default value is 5.

i_round_blueIncrease the value if the target device drops Ping packets because of denial of service (DoS) suspicion.

Acknowledge Automatically

Define if you want to automatically acknowledge the Down status of the sensor:

  • Show down status on error (default): Do not automatically acknowledge an alarm if this sensor changes to the Down status.
  • Show down (acknowledged) status on error: Automatically acknowledge an alarm. If this sensor changes to the Down status, it automatically shows the Down (Acknowledged) status instead.

Sensor Display

Sensor Display

Sensor Display

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.

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 different channels are shown for this sensor:

  • 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 enable Stack channels on top of each other as Graph Type. 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.

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.

Scanning Interval

Scanning Interval

Scanning Interval

i_square_cyanFor more information, see section Root Group Settings, section Scanning Interval.

Schedules, Dependencies, and Maintenance Window

i_round_blueYou 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.

Schedules, Dependencies, and Maintenance Window

Schedules, Dependencies, and Maintenance Window

i_square_cyanFor more information, see section Root Group Settings, section Schedules, Dependencies, and Maintenance Window.

Access Rights

Access Rights

Access Rights

i_square_cyanFor more information, see section Root Group Settings, section Access Rights.

Channel List

i_round_blueWhich 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 in percent.

Maximum

The maximum Ping time when using more than one Ping per interval

Minimum

The minimum Ping time when using more than one Ping per interval

Packet Loss

The packet loss in percent when using more than one Ping per interval

Ping Time

The Ping time in milliseconds (msec)

i_round_blueThis channel is the primary channel by default.

More

i_square_blueKnowledge Base

How to create/customize statistical Ping sensor?

Can I create an inverse Ping sensor?

What security features does PRTG include?