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====== Iperf ======

[[https://iperf.fr/download/windows/iperf-3.1.3-win64.zip|Download Iperf]] für Windows 64bit \\
[[http://www.pcwelt.de/download_file?bid=262685|Download Jperf]] (Iperf mit GUI, Benötigt Java!)

===== Starten von Client und Server =====

**HINWEIS: Alle Befehle in der Admin CMD ausführen** \\

In den Ordner in dem sich Iperf befindet wechseln
<code>
cd "c:\Program Files\iperf"
</code>

Server starten
<code>
iperf3 -s
</code>

Client starten (IP des Servers angeben)
<code>
iperf3 -c 192.168.178.189
</code>

==== Optionen ====
Optionen für Client und Server
<code>
  -p, --port      #         server port to listen on/connect to
  -f, --format    [kmgKMG]  format to report: Kbits, Mbits, KBytes, MBytes
  -i, --interval  #         seconds between periodic bandwidth reports
  -F, --file name           xmit/recv the specified file
  -B, --bind      <host>    bind to a specific interface
  -V, --verbose             more detailed output
  -J, --json                output in JSON format
  --logfile f               send output to a log file
  -d, --debug               emit debugging output
  -v, --version             show version information and quit
  -h, --help                show this message and quit
</code>

Optionen nur für Server
<code>
  -s, --server              run in server mode
  -D, --daemon              run the server as a daemon
  -I, --pidfile file        write PID file
  -1, --one-off             handle one client connection then exit
</code>

Optionen nur für Client
<code>
  -c, --client    <host>    run in client mode, connecting to <host>
  -u, --udp                 use UDP rather than TCP
  -b, --bandwidth #[KMG][/#] target bandwidth in bits/sec (0 for unlimited)
                            (default 1 Mbit/sec for UDP, unlimited for TCP)
                            (optional slash and packet count for burst mode)
  -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, --len       #[KMG]    length of buffer to read or write
                            (default 128 KB for TCP, 8 KB for UDP)
  --cport         <port>    bind to a specific client port (TCP and UDP, default: ephemeral port)
  -P, --parallel  #         number of parallel client streams to run
  -R, --reverse             run in reverse mode (server sends, client receives)
  -w, --window    #[KMG]    set window size / socket buffer size
  -M, --set-mss   #         set TCP/SCTP maximum segment size (MTU - 40 bytes)
  -N, --no-delay            set TCP/SCTP no delay, disabling Nagle's Algorithm
  -4, --version4            only use IPv4
  -6, --version6            only use IPv6
  -S, --tos N               set the IP 'type of service'
  -Z, --zerocopy            use a 'zero copy' method of sending data
  -O, --omit N              omit the first n seconds
  -T, --title str           prefix every output line with this string
  --get-server-output       get results from server
  --udp-counters-64bit      use 64-bit counters in UDP test packets
</code>

<code>
[KMG] indicates options that support a K/M/G suffix for kilo-, mega-, or giga-
</code>

===== Testbefehle =====
https://openmaniak.com/iperf.php \\
https://www.thomas-krenn.com/de/wiki/TCP_und_UDP_Netzwerk_Performance_mit_iperf_messen
<code>
iperf3 -c 192.168.178.189 -w 512k -l 512k

iperf3 -s -i 1 --logfile log.txt          #Server: jitter / packet loss
iperf3 -c 192.168.178.189 -u -b 10m       #Client: jitter / packet loss
</code>

====Jitter und packet loss====

Server:
<code>
iperf3 -s -i 1
</code>
Output:
<code>
Accepted connection from 192.168.178.135, port 52376
[  5] local 192.168.178.189 port 5201 connected to 192.168.178.135 port 53291
[ ID] Interval           Transfer     Bandwidth       Jitter    Lost/Total Datagrams
[  5]   0.00-1.01   sec  1.09 MBytes  9.06 Mbits/sec  1.503 ms  0/139 (0%)
[  5]   1.01-2.01   sec  1.20 MBytes  10.0 Mbits/sec  2.056 ms  0/153 (0%)
[  5]   2.01-3.01   sec  1.19 MBytes  9.96 Mbits/sec  1.647 ms  0/152 (0%)
[  5]   3.01-4.01   sec  1.20 MBytes  10.1 Mbits/sec  1.388 ms  0/154 (0%)
[  5]   4.01-5.01   sec  1.19 MBytes  9.89 Mbits/sec  1.628 ms  0/152 (0%)
[  5]   5.01-6.00   sec  1.20 MBytes  10.2 Mbits/sec  1.630 ms  0/153 (0%)
[  5]   6.00-7.01   sec  1.20 MBytes  9.96 Mbits/sec  1.848 ms  0/153 (0%)
[  5]   7.01-8.00   sec  1.17 MBytes  9.86 Mbits/sec  1.876 ms  0/150 (0%)
[  5]   8.00-9.00   sec  1.20 MBytes  10.0 Mbits/sec  1.834 ms  0/153 (0%)
[  5]   9.00-10.01  sec  1.19 MBytes  9.94 Mbits/sec  1.628 ms  0/152 (0%)
[  5]  10.01-10.08  sec   112 KBytes  13.1 Mbits/sec  1.681 ms  0/14 (0%)
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth       Jitter    Lost/Total Datagrams
[  5]   0.00-10.08  sec  0.00 Bytes  0.00 bits/sec  1.681 ms  0/1525 (0%)
</code>

Client:
<code>
iperf3 -c 192.168.178.189 -u -b 10M           #UDP-Verbindung mit 10 MBits/sec
</code>
Output:
<code>
Connecting to host 192.168.178.189, port 5201
[  4] local 192.168.178.135 port 53291 connected to 192.168.178.189 port 5201
[ ID] Interval           Transfer     Bandwidth       Total Datagrams
[  4]   0.00-1.00   sec  1.14 MBytes  9.57 Mbits/sec  146
[  4]   1.00-2.00   sec  1.17 MBytes  9.83 Mbits/sec  150
[  4]   2.00-3.00   sec  1.20 MBytes  10.0 Mbits/sec  153
[  4]   3.00-4.00   sec  1.17 MBytes  9.83 Mbits/sec  150
[  4]   4.00-5.00   sec  1.22 MBytes  10.2 Mbits/sec  156
[  4]   5.00-6.00   sec  1.16 MBytes  9.75 Mbits/sec  149
[  4]   6.00-7.00   sec  1.20 MBytes  10.0 Mbits/sec  153
[  4]   7.00-8.00   sec  1.17 MBytes  9.80 Mbits/sec  150
[  4]   8.00-9.01   sec  1.20 MBytes  10.0 Mbits/sec  153
[  4]   9.01-10.00  sec  1.30 MBytes  10.9 Mbits/sec  166
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth       Jitter    Lost/Total Datagrams
[  4]   0.00-10.00  sec  11.9 MBytes  10.0 Mbits/sec  1.681 ms  0/1525 (0%)
[  4] Sent 1525 datagrams

iperf Done.
</code>