On 08/06/18 09:05, Gena Makhomed wrote:
[...snip....]
> First test, between two servers without OpenVPN:
> 
> # iperf3 -c 137.74.xxx.xxx
> Connecting to host 137.74.xxx.xxx, port 5201
> [  4] local 138.201.xxx.xxx port 51934 connected to 137.74.xxx.xxx port 5201
[...snip...]
> [  4]   0.00-10.00  sec   120 MBytes   101 Mbits/sec   33             sender
> [  4]   0.00-10.00  sec   117 MBytes  98.1 Mbits/sec receiver
> 
> iperf Done.
> 
> Second test, between OpenVPN interfaces:
> 
> # iperf3 -c 172.31.254.1
> Connecting to host 172.31.254.1, port 5201
[...snip....]
> [  4]   0.00-10.00  sec  33.3 MBytes  27.9 Mbits/sec  246             sender
> [  4]   0.00-10.00  sec  33.0 MBytes  27.7 Mbits/sec receiver
> 
> iperf Done.
> 
> As you can see, OpenVPN has very bad network throughput values,
> compared to raw network values.
First of all, IIRC, the default iperf3 runs uses TCP.  Your VPN tunnel runs
over UDP (which normally is good).  So you're comparing a little bit apples
and oranges here.

Try running the same iperf3 test outside the VPN tunnel with --udp.  Does that
give different results?


--
kind regards,

David Sommerseth

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