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Resolve Bottlenecks

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I was at Spiceworld and the PRTG both stated I could add a sensor to review bottlenecks. I think he said it was a NetFlow. I see 4 different netflow sensors and I have no idea how to set any of them up.

My end goal is to se if I can find out why 1 office location has slower connections then all others.

bandwidth new-user sensors

Created on Oct 20, 2017 8:46:10 PM by  dhoff (0) 1



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Dear dhoff,

the first step would be to determine if your Netflow-capable device supports v5, or v9. Please ensure that the netflow device does send flows. Then please add a device object in PRTG, entering the device's IP address and create the non-custom type of the according Netflow sensor. Configure it accordingly to the device settings.

You now get more detailed traffic information than with an SNMP traffic sensor. The SNMP traffic sensor shows the overall traffic volume, while the Netflow sensor shows a breakdown of different types of traffic. You can compare this with the traffic passed through other connections in order to see if there is anything unusual.

Created on Oct 23, 2017 11:43:03 AM by  Arne Seifert [Paessler Support]



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How do I determine device / netflow sensor capability? Basically, I have win7 pc, HP switch and Fortigate firewall that I am interested with this data.

Created on Oct 23, 2017 1:39:31 PM by  dhoff (0) 1



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Dear dhoff,

as Netflow is a Cisco specific protocol, the HP switch would use Sflow instead, provided it does have flow capabilities. Please refer to its manual, or contact the switch vendor or manufacturer about this. We can support only the PRTG side of the monitoring.

If the switch does not have any flow capabilities, you could use the PRTG packet header sniffer. Depending on your network topology, this can be a more easy, or more complex setup. You might have to setup a remote probe in order to sniff the mirror port of a switch. The aforementioned manual page describes the setup.

Created on Oct 23, 2017 2:39:32 PM by  Arne Seifert [Paessler Support]



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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.