What is this?

This knowledgebase contains questions and answers about PRTG Network Monitor and network monitoring in general. You are invited to get involved by asking and answering questions!

Learn more

PRTG Network Monitor

Intuitive to Use. Easy to manage.
More than 500,000 users rely on Paessler PRTG every day. Find out how you can reduce cost, increase QoS and ease planning, as well.

Free Download

Top Tags


View all Tags

Inverted Sensors

Votes:

0

Your Vote:

Up

Down

Hi there,

I would like to request the feature of inverting individual sensors.

We have a few cases where being able to selectively invert sensors is important, in particular:

  • DR servers need to be running, but not their services under normal operations,
  • Individual switch ports are disconnected and should alert when something connects to it

Cheers, Neil

feature-request inverse prtg

Created on Dec 1, 2014 4:02:49 AM by  neilramsay (0) 1



2 Replies

Votes:

3

Your Vote:

Up

Down

In the sensor channel settings, you can define upper or lower limits for warning and error states. This should enable you to define the condition for status changes according to your needs, e.g. for switch ports, you could set the upper error limit to something slightly larger than 0 to have the sensor enter error state whenever traffic is seen on the interface.

Created on Dec 2, 2014 1:15:49 PM by  ages (1,008) 5 1



Votes:

0

Your Vote:

Up

Down

You can create a Factory Sensor to monitor e.g. a Ping Sensor of your DR Server and a Service Sensor of the same.

You can e.g. this for the Error Handling > Use Custom Formula:

status(sensorIDPingSensor) AND NOT status(sensorIDServiceSensor)

The factory sensor will be up if the Ping is up and the Service Sensor is down.

Created on Dec 2, 2014 3:19:21 PM by  Felix Saure [Paessler Support]



Please log in or register to enter your reply.


Disclaimer: The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.