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QoS Roundtrip sensor: DSCP marking missing on return packets



PRTG Network Monitor Trial.

Using the QoS Round trip sensor with DSCP marking set, the packets going to the remote probe have the DSCP value but the packets returning from the remote probe have DSCP = 00.

The QoS Scheduler is present on the network adapters of both (Windows 7) PCs.

Also, DSCP marking works correctly on the remote PC when using the Ostinato traffic generator to generate marked traffic. (http://code.google.com/p/ostinato/).

I am implementing PRTG Network Monitor for general monitoring and to run the QoS Round trip sensor in an IP Telephony environment on Monday (NZ).

Any input on how to have the sensor apply DSCP maring on the return traffic will be appreciated.

Thanks, Scott

dscp qos roundtrip

Created on Apr 19, 2012 8:10:43 AM

3 Replies




this will be fixed in a version soon to be released, until then please simply use two one-way QoS-Sensors as a work-around.

best regards.

Created on Apr 19, 2012 11:16:26 AM by  Torsten Lindner [Paessler Support]



Thank you.

I think we can close this thread. Is there anything you would like me to do?

Created on Nov 19, 2012 11:09:36 PM



Sorry, there is nothing to do, we actually needed to remove the DSCP-Setting entirely, as the according Windows API-Function was set deprecated by Microsoft.

Created on Nov 20, 2012 2:45:26 PM by  Torsten Lindner [Paessler Support]

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