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Client windows server

iperf3 -c 10.1.4.10  ( default port 5001 )iperf3 -s
1M of bandwidthiperf3 -c 10.1.4.10 -b 1m  iperf3 -s

TCP maximum segment size (MSS)

MSS of 100 ( did not work

iperf3 -c 10.1.4.10 -b 1m -M 100iperf3 -s

The MSS is usually the MTU - 40 bytes for the TCP/IP header.

For ethernet, the MSS is 1460 bytes (1500 byte MTU).


different port

iperf3 -c 10.1.4.10 -b 1m -M 100 -p 5123

iperf3 -c 10.1.4.10 -b 1m -M 100 -p 5124

iperf3 -s -p 5123

iperf3 -s -p 5124

UDPiperf3 -c 10.1.4.10 -b 1m -M 100 -uiperf3 -s -u
Small Vs Big packets

packet length

-t, --time # time in seconds to transmit for (default 10 secs)
-n, --bytes #[KMG] number of bytes to transmit (instead of -t)
-k, --blockcount #[KMG] number of blocks (packets) to transmit (instead of -t or -n)
-l, --length #[KMG] length of buffer to read or write
(default 128 KB for TCP, dynamic or 1460 for UDP)

-P, --parallel # number of parallel client streams to run

-M, --set-mss # set TCP/SCTP maximum segment size (MTU - 40 bytes)


Client & server

iperf3 -c 192.168.0.147 -b 100k -l 100

iperf3 -s





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