ネットワーク帯域幅を測定する2018/11/27 |
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iperf を利用してネットワークの帯域幅を測定します。
クライアント (送信側) とサーバー (受信側) の 2台のマシンが必要となります。 |
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| [1] | 計測に使用する 2台双方に iperf3 をインストールします。 |
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root@dlp:~# apt -y install iperf3
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| [2] | サーバー (受信側) で以下のようにコマンドを実行して待ち受けます。 待ち受けポートを指定する場合は、以下のコマンドに続けて [-p (ポート番号)] を指定します。 指定しない場合のデフォルトポートは [5201] です。 |
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root@dlp:~# iperf3 -s ----------------------------------------------------------- Server listening on 5201 ----------------------------------------------------------- |
| [3] | クライアント (送信側) から以下のようにコマンドを実行して、帯域幅を測定します。 |
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# iperf3 -c (サーバーのホスト名またはIPアドレス) root@www:~# iperf3 -c 10.0.0.30 Connecting to host 10.0.0.30, port 5201 [ 4] local 10.0.0.241 port 60218 connected to 10.0.0.30 port 5201 [ ID] Interval Transfer Bandwidth Retr Cwnd [ 4] 0.00-1.00 sec 2.33 GBytes 20.0 Gbits/sec 0 3.01 MBytes [ 4] 1.00-2.00 sec 2.65 GBytes 22.8 Gbits/sec 0 3.01 MBytes [ 4] 2.00-3.00 sec 2.11 GBytes 18.2 Gbits/sec 0 3.01 MBytes [ 4] 3.00-4.00 sec 2.75 GBytes 23.6 Gbits/sec 0 3.01 MBytes [ 4] 4.00-5.00 sec 2.78 GBytes 23.9 Gbits/sec 0 3.01 MBytes [ 4] 5.00-6.00 sec 2.77 GBytes 23.8 Gbits/sec 0 3.01 MBytes [ 4] 6.00-7.00 sec 2.45 GBytes 21.1 Gbits/sec 1 3.01 MBytes [ 4] 7.00-8.00 sec 2.04 GBytes 17.5 Gbits/sec 0 3.01 MBytes [ 4] 8.00-9.00 sec 2.08 GBytes 17.9 Gbits/sec 0 3.01 MBytes [ 4] 9.00-10.00 sec 2.08 GBytes 17.9 Gbits/sec 0 3.01 MBytes - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth Retr [ 4] 0.00-10.00 sec 24.1 GBytes 20.7 Gbits/sec 1 sender [ 4] 0.00-10.00 sec 24.1 GBytes 20.7 Gbits/sec receiver iperf Done. |
| [4] | その他、様々なオプションを付加してのテストが可能です。 |
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root@dlp:~# iperf3 --help
Usage: iperf [-s|-c host] [options]
iperf [-h|--help] [-v|--version]
Server or Client:
-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
-A, --affinity n/n,m set CPU affinity
-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
Server specific:
-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
Client specific:
-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
-C, --congestion <algo> set TCP congestion control algorithm (Linux and FreeBSD only)
-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'
-L, --flowlabel N set the IPv6 flow label (only supported on Linux)
-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
--no-fq-socket-pacing disable fair-queuing based socket pacing
(Linux only)
[KMG] indicates options that support a K/M/G suffix for kilo-, mega-, or giga-
iperf3 homepage at: http://software.es.net/iperf/
Report bugs to: https://github.com/esnet/iperf
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