I have some questions about NetFlow sensor.
1) Should a scanning interval for NetFlow sensor be set shorter than Active Flow Timeout? When setting the Scanning Interval, is it not necessary to consider Active Flow Timeout?
2) There is a sentence below in the manual. "We recommend that you set the timeout one minute longer than the respective timeout configured in your hardware router device. The maximum timeout is 60 minutes."
Why do you recommend about one minute?
Article Comments
Hi, Felix Wiesneth
The KB post you mentioned was helpful.
But I still have a few questions about Netflow sensor.
As I know that Netflow is a UDP protocol that exports data by push method.
Does PRTG collect Netflow data by polling method every scanning interval?
Or is it to continuously receive all NetFlow data regardless of the scanning interval, and then generate statistics at each scanning interval?
If the NetFlow sensor waits for flow data for Active Flow Timeout value,
Is it retroactively added to the live data in real time?
Thanks in advance.
Feb, 2021 - Permalink
Hi Jonathan,
Netflow will not be polled. NetFlow is received from the device. PRTG generate the statistics every scanning interval.
Kind regards
Felix Wiesneth - Team Tech Support
Mar, 2021 - Permalink
Hello Jonathan,
Regarding your question please take a look below:
Kind regards
Felix Wiesneth - Team Tech Support
Feb, 2021 - Permalink