I played a little bit with the QoS-Probes to measure UDP thoughput (VoIP). There are two probes. One is sending UDP-pakets to a remote probe (oneWay) which analyses the results. The other is sending the UDP-Pakets t oa remote probe and expects to get the packets back. Does this only work with the PRTG Probes or can i use any other device who echos the UDP-pakets back to the sender ?. I played wiht a simple UDP ECHO Process (http://bansky.net/echotool/) to check that but PRTG does not accept the data, thats coming back. I can see the outgoing stream and the incoming data but the probe does not process that. the idea behind: I should be easy to build such a simple UDPEcho as part of a cheap OpenWRT-Router and put them in remote locations (without a PC as remote probe)

Any secretes how the UDP Echo should format the pakets ?

BTW: Version 12.3.3.2854 has a minor problem: If i add a second QoS Server and use the same UDP Port (which is not allowed, i know), i can still "continue" but nothing is saved. I can "Clone" a QoS Sensor and every modification is rolled back until i change the UDp Port to a unique value. A notification would be fine, that the UDP Port is not unique.

Article Comments

Hi,
I'm afraid using the UPD Echo tool is not possible with PRTG's QoS sensors. The sensor requires a remote probe on the other end.
As regarding the unique value issue, I have forwarded this to our dev team and they will have a look on that.
Best regards


Nov, 2012 - Permalink

Thanks for your reply. I did some more tests and wrote some information on http://www.msxfaq.de/tools/prtglync.htm and other pages around.

Especially for the "QoS roundtrip"-Sensor it would be a great idea to allow a generic UDP-Echo-Server as remote endpoint. Because that would make it easy to place cheap probles somewhere (based on a RasberrryPI, Netduino etc) in network areas. I know about one VoIP Gateway vendor, looking for such a thing. Ir would be a nice (and easy) enhancement.


Dec, 2012 - Permalink

Hi,
thank you for writing this article.
I just submitted your request as feature request regarding the UDP echo in addition to a QoS sensor in PRTG.
Best regards


Dec, 2012 - Permalink

I have just seen, that the current Version of PRTG offers now a QoS-Sensor with a "simple UDP Mirror". Great and very welcome, because there are already Routers out there which can act as remote endpoint:

Cisco ISO 11 http://www.cisco.com/c/en/us/support/docs/ios-nx-os-software/ios-software-releases-110/12815-23.html#udp_servers

HP 6600 Router Series - Configuring NQA : Configuring UDP echo tests http://h20565.www2.hp.com/portal/site/hpsc/template.PAGE/public/kb/docDisplay?docId=c03119446&ac.admitted=1414622584257.876444892.492883150#N103AF

and i think many more. Even a simple Arduino or RasPi can now act a s a QoS remote Point.

Unfortunately the probe is limited to Port >= 1024, so the Windows "Simple TCP-Services", cannot be used, they are only offering a ECHO on Port 7/TCP and 7/UDP. And every remote Point must have the same unique port "available". I hope this will changed somewhere in the future because there is not real reason for that restriction. Anyway. page http://www.msxfaq.de/tools/prtg/prtgqosudp.htm updated.


Oct, 2014 - Permalink