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I need to perform a single direction iPerf test. Bi-directionally, using TCP, I get 25Mbps. But single direction using UDP I only get 0.7Mbps.

Why is UDP rate so much lower that TCP?

iPerf client setting: bin/iperf3.exe -c 10.31.186.128 -u -P 1 -i 1 -p 5201 -f m -b 2.0M -t 10

iPerf server is iPad mini running iOS7 Access Agility WIFIPERF app. iPerf client is on DELL PRECISION M4800 Windows 7 64-bit running Iperf3 Cygwin (Jperf 2.0.2)

When I set iPerf client from 1 "Parallel Streams" to 59 streams, I get 50Mbps.

iperf3.exe -c 10.31.186.128 -u -P 59 -i 1 -p 5201 -f m -b 100.0M -t 10 Connecting to host 10.31.186.128, port 5201

Doug Null
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  • I'd be interested in knowing if you have the same problem with IPerf 2.x. IPerf 3 was a rewrite that a lot of networking people don't have any faith in yet. – Spiff Jun 08 '15 at 19:20
  • Did you try with iperf 2? Also I'm not seeing the actual output here. ;) – Daniel B Jun 08 '15 at 21:03

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