Can you share the iperf 2.0.13a <https://sourceforge.net/projects/iperf2/>
output?
Bob
On Fri, Aug 17, 2018 at 1:07 PM, Hector Azpurua <h3ct0r...@gmail.com> wrote:
> Hi guys,
>
> I'm performing some local test on my network with iperf3 using UDP
> connections between 2 Ubuntu 18.04 hosts. But it seems that the UDP iperf3
> connections it is not robust to support a random packet drop of 0.1? When
> executing the iperf3 tests, the server hangs (i need to restart the server
> to allow connecting again) and I'm seeing this errors:
>
> At the server:
>
> *iperf3: the client has unexpectedly closed the connection*
>
> At the client:
>
> *error - unable to write to stream socket: Operation not permitted*
>
> To simulate/test a bad hop on my network I'm using iptables to generate
> random packet drops with this command (executed at the host A):
>
>
> *sudo iptables -A OUTPUT -p udp -d HOSTB -m statistic --mode random
> --probability 0.01 -j DROP*
> And the iperf3 client executed at the host A:
>
> *iperf3 --version4 --udp --client 10.0.3.10 --port 4000 --bind 10.0.1.10
> --cport 12346 --json --zerocopy --verbose --bandwidth 300M --debug*
>
> At the host B i'm using:
>
> *iperf3 --verbose --server --port 4000 --version4 --debug*
>
> As far as documentation/internet examples goes, iperf3 can work with very
> bad networks, what can be happening here?
>
> I have posted this question on ServerFault also: https://serverfault.com/
> questions/926900/iperf3-udp-not-reliable-with-iptables-drop-random. My
> iperf3 version is:
>
> *iperf 3.1.3*
> *Linux PC1 4.15.0-30-generic #32-Ubuntu SMP Thu Jul 26 17:42:43 UTC 2018
> x86_64*
> *Optional features available: CPU affinity setting, IPv6 flow label, TCP
> congestion algorithm setting, sendfile / zerocopy, socket pacing*
>
> The problem also happens with iperf2.
>
> Thanks!
>
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