====== 03 iperf3 ======
ネットワーク負荷試験ツールiperfの新しいバージョン
===== インストール =====
[[01_linux:01_net:11_yum_rpmforgeレポジトリ追加|RPMforgeリポジトリ]] を追加してからyumでインストール
# yum install iperf3
===== オプション =====
# iperf3 -hlep
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
-V, --verbose more detailed output
-J, --json output in JSON format
-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
Client specific:
-c, --client run in client mode, connecting to
-u, --udp use UDP rather than TCP
-b, --bandwidth #[KMG][/#] target bandwidth in bits/sec
(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, --num #[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)
-P, --parallel # number of parallel client streams to run
-R, --reverse run in reverse mode (server sends, client receives)
-w, --window #[KMG] TCP window size (socket buffer size)
-B, --bind bind to a specific interface or multicast address
-C, --linux-congestion set TCP congestion control algorithm (Linux only)
-M, --set-mss # set TCP maximum segment size (MTU - 40 bytes)
-N, --nodelay set TCP 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
[KMG] indicates options that support a K/M/G suffix for kilo-, mega-, or giga-
Report bugs to
==== サーバ側 ====
iperf3 -s
==== クライアント側 ====
iperf3 -c [server ip]
=== 実行例 ===
例: parallel:2, time:10, bandwidth:1G UDP
iperf3 -c [server ip] -P 2 -t 10 -b 1G -u
==== 実行結果 ====
Retrを見ると再送が多くて、ネットワーク品質が安定しない事が分かる
# iperf3 -c 192.168.10.10 -t 10
Connecting to host 192.168.10.140, port 5201
[ 5] local 192.168.10.101 port 36110 connected to 192.168.10.10 port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 1.15 GBytes 9.90 Gbits/sec 18 2.91 MBytes
[ 5] 1.00-2.00 sec 1.15 GBytes 9.91 Gbits/sec 31 3.64 MBytes
[ 5] 2.00-3.00 sec 1.14 GBytes 9.82 Gbits/sec 0 4.10 MBytes
[ 5] 3.00-4.00 sec 1.15 GBytes 9.88 Gbits/sec 26 3.91 MBytes
[ 5] 4.00-5.00 sec 1.15 GBytes 9.84 Gbits/sec 0 4.83 MBytes
[ 5] 5.00-6.00 sec 1.14 GBytes 9.76 Gbits/sec 37 3.12 MBytes
[ 5] 6.00-7.00 sec 1.15 GBytes 9.83 Gbits/sec 0 4.54 MBytes
[ 5] 7.00-8.00 sec 1.15 GBytes 9.89 Gbits/sec 24 4.36 MBytes
[ 5] 8.00-9.00 sec 1.15 GBytes 9.88 Gbits/sec 0 4.36 MBytes
[ 5] 9.00-10.00 sec 1.14 GBytes 9.78 Gbits/sec 35 2.24 MBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 11.5 GBytes 9.85 Gbits/sec 171 sender
[ 5] 0.00-10.04 sec 11.5 GBytes 9.80 Gbits/sec receiver
iperf Done.
{{tag>network}}