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The gap between the throughput of traffic generator like iperf and the throughput of conductor

  • 1.  The gap between the throughput of traffic generator like iperf and the throughput of conductor

    Posted 08-08-2019 04:06
    Hi, All


    I am using the iperf traffic generator for TCP throughput testing. 

    The command of the iperf is as below.
    • Client : iperf3 -c 10.0.0.4 -t 1000 -b 300M 
    • Server : iperf3 -s -V

    There is no problem on both iperf client and server and I have verifed that the throughput is about 300Mbps on iperf.
    But there is the gap between the throughput of iperf and the throughput of conductor.

    When I check the throughput on conductor, it is about 320Mbps. This is more about 20Mbps than sending traffic from iperf traffic generator.

    Is it normal or abnormal?

    For your reference, I attached GUI screen of conductor and iperf.

    Thanks.
    Sangjun

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    Sangjun Bae
    Seoul
    +82-2-3469-2944
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  • 2.  RE: The gap between the throughput of traffic generator like iperf and the throughput of conductor

     
    Posted 08-09-2019 18:22

    Just a guess, but conductor is probably reporting the maximum bandwidth over a given interval, not the average.

    I can see in your screenshots that there is quite a bit of variation in the reported bandwidth from iperf, one sample reported as high as 324Mbit/s.
    If that's the case, then the bandwidth reported by conductor would seem to be quite accurate.



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    Ryan Sitzman
    Sales Engineer
    Burlington MA
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    Original Message