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Iperf ist ein kleines, zeilenbasiertes, installationsfreies Netzwerktool für viele Betriebssysteme, dass den maximalen Datendurchsatz via TCP oder UDP zwischen zwei Netzwerkknoten austestet. Dabei fungiert ein Programmaufruf als Server und ein weiterer als Client.



Whiterussian (Standardfirmware)

ipkg update
ipkg install http://downloads.openwrt.org/backports/0.9/uclibcxx_0.2.1-1_mipsel.ipk
ipkg install http://downloads.openwrt.org/backports/0.9/iperf_2.0.2-1_mipsel.ipk


ipkg update
ipkg install iperf




iperf -s


iperf -c

Auszug aus der Hilfe

Usage: iperf [-s|-c host] [options]
       iperf [-h|--help] [-v|--version]


 -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)
 -o, --output    <filename> output the report or error message to this specified file
 -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      <host>   bind to <host>, an interface or multicast address
 -C, --compatibility      for use with older versions does not sent extra msgs
 -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
 -R, --remove             remove service in win32

Client specific:

 -b, --bandwidth #[KM]    for UDP, bandwidth to send at in bits/sec
                          (default 1 Mbit/sec, implies -u)
 -c, --client    <host>   run in client mode, connecting to <host>
 -d, --dualtest           Do a bidirectional test simultaneously
 -n, --num       #[KM]    number of bytes to transmit (instead of -t)
 -r, --tradeoff           Do a bidirectional test individually
 -t, --time      #        time in seconds to transmit for (default 10 secs)
 -F, --fileinput <name>   input the data to be transmitted from a file
 -I, --stdin              input the data to be transmitted from stdin
 -L, --listenport #       port to recieve bidirectional tests back on
 -P, --parallel  #        number of parallel client threads to run
 -T, --ttl       #        time-to-live, for multicast (default 1)


 -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_<long option name>, such as IPERF_BANDWIDTH.

Report bugs to <dast@nlanr.net>


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