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testing wireless network with iperf

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  • 1.  testing wireless network with iperf

    Posted Jun 30, 2020 10:55 AM

    We have an office with users and they are complaining about low speed/wifi quality on audio/video.

     

    I have tested from a laptop installed in that office with iperf and I can see some pk loss when testing UDP. TCP is working fine.

    I have checked the switch port where the AP is connected..100Mb, duplex..no errors. AP model 205, MM-MD setup

     

    iperf3 -c 10.1.48.37 -u -b 100M -t 300  sending UDP for 300 sec on a 100Mb link

    - - - - - - - - - - - - - - - - - - - - - - - - -

    [ ID]        Interval           Transfer        Bandwidth       Jitter        Lost/Total Datagrams

    [  4]   0.00-300.00 sec  2.93 GBytes  84.0 Mbits/sec  6.030 ms  101435/384517 (26%)

    [  4] Sent 384517 datagrams

     

    During 1 min:

     

                 [ ID] Interval           Transfer     Bandwidth       Jitter      Lost/Total Datagrams

    [  4]   0.00-60.00  sec   546 MBytes  76.4 Mbits/sec  1.265 ms  3686/69921 (5.3%)

    [  4] Sent 69921 datagrams

     

    During 5 min:

    - - - - - - - - - - - - - - - - - - - - - - - - -

                 [ ID] Interval           Transfer     Bandwidth       Jitter    Lost/Total Datagrams

    [  4]   0.00-300.01 sec  2.99 GBytes  85.6 Mbits/sec  6.263 ms  316953/391788 (81%)

    [  4] Sent 391788 datagrams

     

    During 1 min again:

     

    - - - - - - - - - - - - - - - - - - - - - - - -

    [ ID] Interval           Transfer     Bandwidth       Jitter    Lost/Total Datagrams

    [  4]   0.00-30.01  sec   314 MBytes  87.9 Mbits/sec  4.601 ms  5964/40249 (15%)

    [  4] Sent 40249 datagrams

     

     

    Do you have idea what can cause this ? Can we trust iperf ?



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