Linux - iperf - тестирование скорости по TCP/UDP

На сервере запускаем (тестируем через UDP):

#  iperf -s -p 1111 -u -i1
-s - режим сервера
-p - порт 
-u - использовать UDP (по-умолчанию TCP)
-i1 - обвнолять результаты каждую секунду.

На клиента запускаем (тестируем через UDP):

#  iperf -c server_ip -m -p 1111 -t 60 -u -b 1G -t60
-m - показывать максимальный размер сегмента (MTU - TCP / IP заголовке)
-p - порт 
-u - использовать UDP (по-умолчанию TCP)
-b 1G - пропускная способность для UDP (по-умолчанию, 1Mbit/s)
-t60 - тестируем в течении 60 секунд

Usage: iperf [-s|-c host] [-p port] [-t secs] [-w bytes] ...
      iperf [-h|--help] [-v|--version] 

Client/Server:
 -f, --format    [kmKM]   format to report: Kbits, Mbits, KBytes, MBytes
 -i, --interval  #        seconds between periodic bandwidth reports
 -l, --len       #[KM]    length of buffer to read or write (default 8 KB)
 -m, --print_mss          print TCP maximum segment size (MTU - TCP/IP header)
 -p, --port      #        server port to listen on/connect to
 -u, --udp                use UDP rather than TCP
 -w, --window    #[KM]    TCP window size (socket buffer size)
 -B, --bind         bind to , an interface or multicast address
 -M, --mss       #        set TCP maximum segment size (MTU - 40 bytes)
 -N, --nodelay            set TCP no delay, disabling Nagle's Algorithm
 -V, --IPv6Version        Set the domain to IPv6 

Server specific:
 -s, --server             run in server mode
 -D, --daemon		   run the server as a daemon 

Client specific:
 -a, --tcp_bandwidth \    for TCP, bandwidth to send at in bits/sec

#[KM] (default no bandwidth limit used)

 -b, --bandwidth #[KM]    for UDP, bandwidth to send at in bits/sec
                          (default 1 Mbit/sec, implies -u)
 -c, --client       run in client mode, connecting to 
 -n, --num       #[KM]    number of bytes to transmit (instead of -t)
 -t, --time      #        time in seconds to transmit for (default 10 secs)
 -F, --fileinput    input the data to be transmitted from a file
 -I, --stdin              input the data to be transmitted from stdin
 -P, --parallel  #        number of parallel client threads to run
 -S, --tos       #        set type-of-service for outgoing packets
 -T, --ttl       #        time-to-live, for multicast (default 1)
 -W, --windowSizeSuggest  Run the client so as to suggest a suitable window size (default off) 

Miscellaneous:
 -h, --help               print this message and quit
 -v, --version            print version information and quit

[KM] Indicates options that support a K or M suffix for kilo- or mega- 

The TCP window size option can be set by the environment variable
TCP_WINDOW_SIZE. Most other options can be set by an environment variable
IPERF_, such as IPERF_BANDWIDTH.