Iperf 是一個網絡性能測試工具。Iperf可以測試最大TCP和UDP帶寬性能，具有多種參數和UDP特性，可以根據需要調整，可以報告帶寬、延遲抖動和數據包丟失。

下載地址：https://iperf.fr/iperf-download.php

下載最新的3即可

以windows為例

服務端

cd C:\iperf-3.1.3-win64 iperf3 -s

默認監聽5201

客戶端

cd C:\iperf-3.1.3-win64 iperf3 -c 10.24.90.243

返回結果，千兆的

C:\Users\isesol\Desktop\iperf-3.1.3-win64>iperf3 -c 10.24.90.243 Connecting to host 10.24.90.243, port 5201 [ 4] local 10.24.220.101 port 64646 connected to 10.24.90.243 port 5201 [ ID] Interval Transfer Bandwidth [ 4] 0.00-1.01 sec 113 MBytes 935 Mbits/sec [ 4] 1.01-2.01 sec 112 MBytes 945 Mbits/sec [ 4] 2.01-3.01 sec 86.5 MBytes 727 Mbits/sec [ 4] 3.01-4.01 sec 112 MBytes 938 Mbits/sec [ 4] 4.01-5.01 sec 112 MBytes 945 Mbits/sec [ 4] 5.01-6.01 sec 112 MBytes 944 Mbits/sec [ 4] 6.01-7.00 sec 111 MBytes 934 Mbits/sec [ 4] 7.00-8.00 sec 112 MBytes 945 Mbits/sec [ 4] 8.00-9.00 sec 113 MBytes 946 Mbits/sec [ 4] 9.00-10.02 sec 114 MBytes 945 Mbits/sec - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth [ 4] 0.00-10.02 sec 1.07 GBytes 921 Mbits/sec sender [ 4] 0.00-10.02 sec 1.07 GBytes 921 Mbits/sec receiveriperf Done.

百兆的

C:\Users\isesol\Desktop\iperf-3.1.3-win64>iperf3 -c 10.24.90.243 Connecting to host 10.24.90.243, port 5201 [ 4] local 10.24.220.101 port 64755 connected to 10.24.90.243 port 5201 [ ID] Interval Transfer Bandwidth [ 4] 0.00-1.01 sec 11.6 MBytes 96.2 Mbits/sec [ 4] 1.01-2.01 sec 11.2 MBytes 94.5 Mbits/sec [ 4] 2.01-3.01 sec 11.2 MBytes 94.5 Mbits/sec [ 4] 3.01-4.01 sec 11.2 MBytes 94.5 Mbits/sec [ 4] 4.01-5.01 sec 11.2 MBytes 94.5 Mbits/sec [ 4] 5.01-6.01 sec 11.2 MBytes 94.5 Mbits/sec [ 4] 6.01-7.00 sec 11.2 MBytes 94.5 Mbits/sec [ 4] 7.00-8.00 sec 11.2 MBytes 94.5 Mbits/sec [ 4] 8.00-9.00 sec 11.2 MBytes 94.5 Mbits/sec [ 4] 9.00-10.02 sec 11.5 MBytes 95.1 Mbits/sec - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth [ 4] 0.00-10.02 sec 113 MBytes 94.8 Mbits/sec sender [ 4] 0.00-10.02 sec 113 MBytes 94.7 Mbits/sec receiveriperf Done.

測了一陣發現，ESXI兩個網卡竟然一個100M，一個1000M，排除了交換機限速的原因，對調一下網線，居然換過來了，有時間再把網線給替換了吧。

centos6安裝

rpm -ivh https://iperf.fr/download/fedora/iperf-2.0.4-1.el6.rf.x86_64.rpm

centos7安裝

rpm -ivh https://iperf.fr/download/fedora/iperf3-3.1.3-1.fc24.x86_64.rpm

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總結

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