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.
The default number of pings per scanning interval is 5.
Ping Sensor
For a detailed list and descriptions of the channels that this sensor can show, see section Channel List.
If the name contains angle brackets (<>), PRTG replaces them with braces ({}) for security reasons. For more information, see the Knowledge Base: What security features does PRTG include?
This 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.
It is not possible to enter tags with a leading plus (+) or minus (-) sign, nor tags with parentheses (()) or angle brackets (<>).
For 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 () to the highest priority ().
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.
We 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. This setting is useful for monitoring availability.
Send multiple ping requests (default): 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 useful if you want to create reports about average ping times out of a series of ping requests. If you select this setting, all of the ping requests must be lost for the sensor to show the Downstatus. 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.
Increase 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
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.
You can set a different primary channel later by clicking 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. 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. 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 under the corresponding setting name to disable the inheritance and to display its options.
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.
Schedules, Dependencies, and Maintenance Window
For more information, see section Root Group Settings, section Schedules, Dependencies, and Maintenance Window.
Access Rights
Access Rights
For more information, see section Root Group Settings, section Access Rights.
Channel List
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
Maximum
The maximum ping time when using more than one ping per interval
Minimum
The maximum ping time when using more than one ping per interval
Packet Loss
The packet loss when using more than one ping per interval (%)