What is this?

This knowledgebase contains questions and answers about PRTG Network Monitor and network monitoring in general.

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

PRTG Netflow on a network



I have over 900 switches in a core, distribution, access layer configuration. I would like to deploy Netflow on my network. Do I deploy Netflow out to all of my switches or just to the core? If I deploy to more than just the core, do I need to use different network ports for each Netflow deployment?

cisco netflow prtg

Created on Feb 10, 2020 4:12:07 PM

1 Reply




In the NetFlow Sensor you can either:

-enter an IP address to only receive data from a specific device. This way you would need one netflow sensor for each device. If you want to differ traffic for the individual devices then each device should send on a different port.

-or leave the IP field empty to receive data from any device on the specified port. In this case you can use 1 Netflow sensor for multiple devices.

Please not that we do not recommend using more than 50 of this sensor type on each probe.

Kind Regards,
Timo Dambach
Paessler Tech Support

Created on Feb 11, 2020 12:48:21 PM by  Timo Dambach [Paessler Support]

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.