如何使用 iPerf2 / iPerf3 测试网络速度、性能和带宽

1. 写在前面

iPerf(Internet Performance Working Group ) 是专业的网络测试工具，基于 TCP/IP 和 UDP/IP 协议，测量两个节点之间 TCP 和 UDP 端口的网络带宽，支持提供网络延迟、丢包率等统计信息。

实现机制相当简单：它创建 TCP 和 UDP 流，并将流量从一台主机发送到另一台主机，然后向用户报告最大带宽。这允许用户确定网络吞吐量和最高带宽速度。

iPerf 分 iPerf2 和 iPerf3 版本，两者都用于测量网络性能，完全独立实现，具有不同的优势、不同的选项和不同的功能。执行命令也不一样，iPerf3 为 $ iperf3 ...，iPerf2 为 $ iperf ...。

本文通过示例分别介绍及两者之间的区别。

2. iPerf2

iPerf2（iPerf）是一种通过 TCP 和 UDP 套接字测量网络带宽和延迟（包括双队列 L4S）的方法。其目标之一是保持 iperf 代码库在各种平台和操作系统上运行。它是一种多线程架构，与系统中的 CPU 或内核数量成比例增长，通过这些 CPU 或内核，它可以使用高影响和低影响策略获取和报告网络性能。

最新版本：2.1.9 2023 年 3 月 14 日

下载地址：https://sourceforge.net/projects/iperf2/files/iperf-2.1.9.tar.gz/download

2.1 如何在 Linux 系统中安装 iPerf2

iPerf 由客户端和服务端组成，客户端连接到需要测试速度的服务端，且客户端和服务端均需要运行 iPerf 程序。

如果两台机器都运行 Ubuntu/Debian，则操作步骤相同:

(1) 下载并解压 iperf 源码包

$ wget https://sourceforge.net/projects/iperf2/files/iperf-2.1.9.tar.gz/download

$ tar zxvf iperf-2.1.9.tar.gz
--------------------------------------------------------------------------------------
iperf-2.1.9/
iperf-2.1.9/m4/
iperf-2.1.9/m4/ax_create_stdint_h.m4
... ...

**(2) 安装 iperf **

$ cd iperf-2.1.9/
$ ./configure
$ make
$ make install

(3) 验证

$ iperf --version
iperf version 2.1.9 (14 March 2023) pthreads

备注：Ubuntu 其他安装方式（不建议，版本老 Bug 多）：

$ sudo apt install iperf
$ iperf --version
iperf version 2.0.13 (21 Jan 2019) pthreads

2.2 如何测试两个 Linux 服务器之间的网络速度

测试环境：

Server：10.20.3.215
Client：10.100.0.111

2.2.1 启动 Server 端

使用 -s 选项在 Server 模式下启动 iperf，默认情况下监听 5201 端口。

root@dev:~# iperf -s

------------------------------------------------------------
Server listening on TCP port 5001
TCP window size:  128 KByte (default)
------------------------------------------------------------

当终端显示 Server listening on 5001 时,就表示 Server 已经正常运行，等待测试了。默认情况下，iPerf 使用 TCP，并监听端口 5001。

可选参数：

-u: 使用 UDP 而不是 TCP;
-p: 更改默认端口;

例如，让 Server 端使用 UDP 并监听 5003 端口：

root@dev:~# iperf -s -u -p 5003
------------------------------------------------------------
Server listening on UDP port 5003
UDP buffer size:  208 KByte (default)
------------------------------------------------------------

现在监听 UDP 端口 5003；

2.2.2 从 Client 端连接 Server 端

2.2.2.1 使用 TCP

启动 Server 后，从 Client 连接到 Server：

root@dev:~# iperf -c 10.20.3.215
------------------------------------------------------------
Client connecting to 10.20.3.215, TCP port 5001
TCP window size: 16.0 KByte (default)
------------------------------------------------------------
[  1] local 10.100.0.111 port 33346 connected with 10.20.3.215 port 5001 (icwnd/mss/irtt=13/1398/2931)
[ ID] Interval       Transfer     Bandwidth
[  1] 0.00-10.05 sec  1.06 GBytes   905 Mbits/sec

iperf -c 10.20.3.215 启动与 Server 端 10.20.3.215 连接。

默认的 TCP 窗口大小 85 KB（TCP window size）。间隔时间为10秒。传输了 1 GB数据。带宽为 5.10 Mbits/sec。

可选参数：

-i: 指定间隔时间（以秒为单位），默认值为 10s；
-t: 指定运行测试的时间，以秒为单位；
-p: 指定端口，默认为 5001；
-w: 指定 TCP 窗口大小，默认为 85 KB；

例如：在 Client 端，我们并发 4 个数据流，测试总时长为 30 秒，每 5 秒输出一次结果。以下为测试所使用的命令。

间隔时间设置为 5 秒;
测试持续时间设置为 30 秒;
TCP 窗口大小设置为 416 KB;
端口设置为 5001;
并发 4 组数据流；

root@dev:~# iperf -c 10.20.3.215 -P 4 -i 5 -t 30 -w 416K -p 5001
------------------------------------------------------------
Client connecting to 10.20.3.215, TCP port 5001
TCP window size:  416 KByte
------------------------------------------------------------
[  2] local 10.100.0.111 port 47764 connected with 10.20.3.215 port 5001 (icwnd/mss/irtt=13/1398/2752)
[  1] local 10.100.0.111 port 47756 connected with 10.20.3.215 port 5001 (icwnd/mss/irtt=13/1398/2833)
[  3] local 10.100.0.111 port 47780 connected with 10.20.3.215 port 5001 (icwnd/mss/irtt=13/1398/2690)
[  4] local 10.100.0.111 port 47788 connected with 10.20.3.215 port 5001 (icwnd/mss/irtt=13/1398/2561)
[ ID] Interval       Transfer     Bandwidth
[  1] 0.00-5.00 sec   135 MBytes   226 Mbits/sec
[  2] 0.00-5.00 sec   136 MBytes   228 Mbits/sec
[  3] 0.00-5.00 sec   136 MBytes   228 Mbits/sec
[  4] 0.00-5.00 sec   136 MBytes   227 Mbits/sec
[SUM] 0.00-5.00 sec   542 MBytes   909 Mbits/sec
[  1] 5.00-10.00 sec   135 MBytes   227 Mbits/sec
[  2] 5.00-10.00 sec   135 MBytes   227 Mbits/sec
[  3] 5.00-10.00 sec   135 MBytes   226 Mbits/sec
[  4] 5.00-10.00 sec   135 MBytes   227 Mbits/sec
[SUM] 5.00-10.00 sec   541 MBytes   907 Mbits/sec
[  1] 10.00-15.00 sec   135 MBytes   227 Mbits/sec
[  2] 10.00-15.00 sec   136 MBytes   227 Mbits/sec
[  3] 10.00-15.00 sec   136 MBytes   227 Mbits/sec
[  4] 10.00-15.00 sec   135 MBytes   227 Mbits/sec
[SUM] 10.00-15.00 sec   542 MBytes   909 Mbits/sec
[  1] 15.00-20.00 sec   136 MBytes   228 Mbits/sec
[  2] 15.00-20.00 sec   135 MBytes   227 Mbits/sec
[  3] 15.00-20.00 sec   136 MBytes   228 Mbits/sec
[  4] 15.00-20.00 sec   135 MBytes   226 Mbits/sec
[SUM] 15.00-20.00 sec   542 MBytes   908 Mbits/sec
[  1] 20.00-25.00 sec   135 MBytes   226 Mbits/sec
[  2] 20.00-25.00 sec   135 MBytes   227 Mbits/sec
[  3] 20.00-25.00 sec   136 MBytes   228 Mbits/sec
[  4] 20.00-25.00 sec   135 MBytes   227 Mbits/sec
[SUM] 20.00-25.00 sec   541 MBytes   908 Mbits/sec
[  1] 25.00-30.00 sec   136 MBytes   228 Mbits/sec
[  2] 25.00-30.00 sec   135 MBytes   226 Mbits/sec
[  3] 25.00-30.00 sec   136 MBytes   228 Mbits/sec
[  4] 25.00-30.00 sec   135 MBytes   226 Mbits/sec
[SUM] 25.00-30.00 sec   541 MBytes   908 Mbits/sec
[  1] 0.00-30.02 sec   812 MBytes   227 Mbits/sec
[  2] 0.00-30.02 sec   812 MBytes   227 Mbits/sec
[  4] 0.00-30.02 sec   811 MBytes   227 Mbits/sec
[  3] 0.00-30.02 sec   813 MBytes   227 Mbits/sec
[SUM] 0.00-30.00 sec  3.17 GBytes   908 Mbits/sec

测试时，iPerf 的 Server 端和 Client 端都会输出测试结果。测试过程中，根据间隔时间的参数，终端会不断地显示当前时间间隔内测试结果。当测试结束后，iPerf 将测试结果汇总，输出最终测试结果。

2.2.2.2 使用 UDP

使用 UDP 代替 TCP。对应 Server 端也需要使用 UDP。

Server:

root@dev:~# iperf -s -u
------------------------------------------------------------
Server listening on UDP port 5001
UDP buffer size:  208 KByte (default)
------------------------------------------------------------

Client:

root@dev:~# iperf -c 10.20.3.215 -u
------------------------------------------------------------
Client connecting to 10.20.3.215, UDP port 5001
Sending 1470 byte datagrams, IPG target: 11215.21 us (kalman adjust)
UDP buffer size:  208 KByte (default)
------------------------------------------------------------
write failed: Message too long
[ ID] Interval       Transfer     Bandwidth
[  1] 0.00-0.01 sec  2.87 KBytes  2.07 Mbits/sec
[  1] Sent 3 datagrams
[  1] local 10.100.0.111 port 58816 connected with 10.20.3.215 port 5001
[  3] WARNING: did not receive ack of last datagram after 10 tries.

我们注意到带宽比 TCP 低得多。原因是 iPerf 默认将 UDP 的带宽限制为 1Mbits/sec。我们可以通过添加 -b 选项来取代这一限制：

root@dev:~# iperf -c 10.20.3.215 -u -b 1000M
------------------------------------------------------------
Client connecting to 10.20.3.215, UDP port 5001
Sending 1470 byte datagrams, IPG target: 11.22 us (kalman adjust)
UDP buffer size:  208 KByte (default)
------------------------------------------------------------
[  1] local 10.100.0.111 port 49639 connected with 10.20.3.215 port 5001
[ ID] Interval       Transfer     Bandwidth
[  1] 0.00-10.00 sec   868 MBytes   728 Mbits/sec
[  1] Sent 618910 datagrams
[  1] Server Report:
[ ID] Interval       Transfer     Bandwidth        Jitter   Lost/Total Datagrams
[  1] 0.00-10.01 sec   458 MBytes   384 Mbits/sec   0.049 ms 291930/618910 (47%)
[  1] 0.00-10.01 sec  7 datagrams received out-of-order

可以看到，带宽明显增加了。

3. iPerf3

iperf3 是从零开始的全新实现，目标是实现更小、更简单的代码库，并不向后兼容 iperf2。

3.1 如何在 Linux 系统中安装 iPerf3

开始使用 iperf3 之前，需要在两台用于基准测试的计算机上安装它。由于 iperf3 在大多数常见 Linux 发行版的官方软件仓库中都有提供，因此使用软件包管理器很容易安装，如下所示。

$ sudo apt install iperf3         [On Debian, Ubuntu and Mint]
$ sudo yum install iperf3         [On RHEL/CentOS/Fedora and Rocky/AlmaLinux]
$ sudo emerge -a net-misc/iperf   [On Gentoo Linux]
$ sudo apk add iperf3             [On Alpine Linux]
$ sudo pacman -S iperf3           [On Arch Linux]
$ sudo zypper install iperf3      [On OpenSUSE]

在两台机器上都安装了 iperf3 后，就可以开始测试网络吞吐量了。

3.2 如何测试两个 Linux 服务器之间的网络速度

测试环境：

Server：10.20.3.215
Client：10.100.0.111

3.2.1 启动 Server 端

使用 -s 选项在 Server 模式下启动 iperf3，默认情况下监听 5201 端口。可以使用 -f 指定报告格式（k, m, g 表示 Kbits、Mbits、Gbits 或 K、M、G 表示 KBytes、Mbytes、Gbytes），如:

root@dev:~# iperf3 -s -f K 
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------

如果服务器上的其他程序正在使用 5201 端口，可以使用 -p 指定不同的端口（如 3000），如:

root@dev:~# iperf3 -s -p 3000
-----------------------------------------------------------
Server listening on 3000
-----------------------------------------------------------

可以选择使用 -D 将服务作为守护进程运行，并将服务信息写入日志文件，如:

$ iperf3 -s -D > iperf3log

3.2.1 启动 Client 端

使用 -c 在 client 模式下运行 iperf3，并指定运行 Server 的主机（IP 地址、域或主机名）。

root@dev:~# iperf3 -c 10.20.3.215 -f K
Connecting to host 10.20.3.215, port 5201
[  5] local 10.100.0.111 port 53552 connected to 10.20.3.215 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec   109 MBytes  111723 KBytes/sec   36    680 KBytes       
[  5]   1.00-2.00   sec   108 MBytes  110080 KBytes/sec    0    789 KBytes       
[  5]   2.00-3.00   sec   109 MBytes  111253 KBytes/sec   16    673 KBytes       
[  5]   3.00-4.00   sec   109 MBytes  111468 KBytes/sec    0    784 KBytes       
[  5]   4.00-5.00   sec   108 MBytes  110068 KBytes/sec   16    658 KBytes       
[  5]   5.00-6.00   sec   109 MBytes  111369 KBytes/sec    0    773 KBytes       
[  5]   6.00-7.00   sec   108 MBytes  110080 KBytes/sec   15    654 KBytes       
[  5]   7.00-8.00   sec   109 MBytes  111339 KBytes/sec    0    767 KBytes       
[  5]   8.00-9.00   sec   106 MBytes  108823 KBytes/sec   16    648 KBytes       
[  5]   9.00-10.00  sec   109 MBytes  111311 KBytes/sec    0    763 KBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  1.06 GBytes  110751 KBytes/sec   99             sender
[  5]   0.00-10.00  sec  1.05 GBytes  110378 KBytes/sec                  receiver

iperf Done.

18 至 20 秒后，client 终止并显示基准平均吞吐量的结果;

3.3 如何在 Linux 中执行高级网络吞吐量测试

TCP 窗口大小（TCP window size）是决定特定时间内网络中数据量的重要因素之一，它对调整 TCP 连接非常重要。可以使用 -w 设置window size/socket buffer size大小，如下所示：

root@dev:~# iperf3 -c 10.20.3.215 -f K -w 400K
Connecting to host 10.20.3.215, port 5201
[  5] local 10.100.0.111 port 41882 connected to 10.20.3.215 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec   107 MBytes  109382 KBytes/sec    0    218 KBytes       
[  5]   1.00-2.00   sec   107 MBytes  109990 KBytes/sec    0    218 KBytes       
[  5]   2.00-3.00   sec   108 MBytes  110296 KBytes/sec    0    218 KBytes       
[  5]   3.00-4.00   sec   108 MBytes  110354 KBytes/sec    0    218 KBytes       
[  5]   4.00-5.00   sec   107 MBytes  109439 KBytes/sec    0    218 KBytes       
[  5]   5.00-6.00   sec   108 MBytes  110338 KBytes/sec    0    218 KBytes       
[  5]   6.00-7.00   sec   107 MBytes  109574 KBytes/sec    0    218 KBytes       
[  5]   7.00-8.00   sec   108 MBytes  110454 KBytes/sec    0    218 KBytes       
[  5]   8.00-9.00   sec   107 MBytes  110021 KBytes/sec    0    218 KBytes       
[  5]   9.00-10.00  sec   108 MBytes  110380 KBytes/sec    0    218 KBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  1.05 GBytes  110023 KBytes/sec    0             sender
[  5]   0.00-10.00  sec  1.05 GBytes  109988 KBytes/sec                  receiver

iperf Done.

要反向模式运行，即 Server 发送，Client 接收，请添加 -R 选项。

root@dev:~# iperf3 -c 10.20.3.215 -f K -w 400K -R
Connecting to host 10.20.3.215, port 5201
Reverse mode, remote host 10.20.3.215 is sending
[  5] local 10.100.0.111 port 46760 connected to 10.20.3.215 port 5201
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-1.00   sec   106 MBytes  108551 KBytes/sec                  
[  5]   1.00-2.00   sec   108 MBytes  110173 KBytes/sec                  
[  5]   2.00-3.00   sec   108 MBytes  110152 KBytes/sec                  
[  5]   3.00-4.00   sec   106 MBytes  108855 KBytes/sec                  
[  5]   4.00-5.00   sec   107 MBytes  109859 KBytes/sec                  
[  5]   5.00-6.00   sec   106 MBytes  108182 KBytes/sec                  
[  5]   6.00-7.00   sec   107 MBytes  109341 KBytes/sec                  
[  5]   7.00-8.00   sec   108 MBytes  110443 KBytes/sec                  
[  5]   8.00-9.00   sec   107 MBytes  109738 KBytes/sec                  
[  5]   9.00-10.00  sec   108 MBytes  110363 KBytes/sec                  
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  1.05 GBytes  109606 KBytes/sec    0             sender
[  5]   0.00-10.00  sec  1.04 GBytes  109566 KBytes/sec                  receiver

iperf Done.

要运行双向测试，即同时测量两个方向的带宽，请使用 -d 选项。

root@dev:~# iperf3 -c 10.20.3.215 -f K -w 400K -d

如果想在 Client 输出中获取 Server 结果，请使用 --get-server-output 选项。

root@dev:~# iperf3 -c 10.20.3.215 -f K -w 400K -R --get-server-output
Connecting to host 10.20.3.215, port 5201
Reverse mode, remote host 10.20.3.215 is sending
[  5] local 10.100.0.111 port 54610 connected to 10.20.3.215 port 5201
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-1.00   sec   105 MBytes  107731 KBytes/sec                  
[  5]   1.00-2.00   sec   106 MBytes  108141 KBytes/sec                  
[  5]   2.00-3.00   sec   107 MBytes  109897 KBytes/sec                  
[  5]   3.00-4.00   sec   108 MBytes  110664 KBytes/sec                  
[  5]   4.00-5.00   sec   108 MBytes  110152 KBytes/sec                  
[  5]   5.00-6.00   sec   108 MBytes  110387 KBytes/sec                  
[  5]   6.00-7.00   sec   107 MBytes  109670 KBytes/sec                  
[  5]   7.00-8.00   sec   107 MBytes  110040 KBytes/sec                  
[  5]   8.00-9.00   sec   108 MBytes  110933 KBytes/sec                  
[  5]   9.00-10.00  sec   107 MBytes  109457 KBytes/sec                  
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  1.05 GBytes  109743 KBytes/sec    0             sender
[  5]   0.00-10.00  sec  1.05 GBytes  109707 KBytes/sec                  receiver

Server output:
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------
Accepted connection from 10.100.0.111, port 54606
[  5] local 10.0.1.252 port 5201 connected to 10.100.0.111 port 54610
[ ID] Interval           Transfer     Bandwidth       Retr  Cwnd
[  5]   0.00-1.00   sec   105 MBytes  107961 KBytes/sec    0    218 KBytes       
[  5]   1.00-2.00   sec   106 MBytes  108119 KBytes/sec    0    218 KBytes       
[  5]   2.00-3.00   sec   107 MBytes  109923 KBytes/sec    0    218 KBytes       
[  5]   3.00-4.00   sec   108 MBytes  110809 KBytes/sec    0    218 KBytes       
[  5]   4.00-5.00   sec   107 MBytes  110079 KBytes/sec    0    218 KBytes       
[  5]   5.00-6.00   sec   108 MBytes  110407 KBytes/sec    0    218 KBytes       
[  5]   6.00-7.00   sec   107 MBytes  109641 KBytes/sec    0    218 KBytes       
[  5]   7.00-8.00   sec   108 MBytes  110141 KBytes/sec    0    218 KBytes       
[  5]   8.00-9.00   sec   108 MBytes  110789 KBytes/sec    0    218 KBytes       
[  5]   9.00-10.00  sec   107 MBytes  109542 KBytes/sec    0    218 KBytes       
[  5]  10.00-10.00  sec  0.00 Bytes  0.00 KBytes/sec    0    218 KBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth       Retr
[  5]   0.00-10.00  sec  1.05 GBytes  109734 KBytes/sec    0             sender
[  5]   0.00-10.00  sec  0.00 Bytes  0.00 KBytes/sec                  receiver


iperf Done.

使用 -P 选项设置同时运行的并行客户端流的数量（本例中为两个）。

root@dev:~# iperf3 -c 10.20.3.215 -f K -w 400K -P 2
Connecting to host 10.20.3.215, port 5201
[  5] local 10.100.0.111 port 53508 connected to 10.20.3.215 port 5201
[  7] local 10.100.0.111 port 53518 connected to 10.20.3.215 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  54.0 MBytes  55326 KBytes/sec    0    217 KBytes       
[  7]   0.00-1.00   sec  54.0 MBytes  55290 KBytes/sec    0    216 KBytes       
[SUM]   0.00-1.00   sec   108 MBytes  110617 KBytes/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   1.00-2.00   sec  53.7 MBytes  54950 KBytes/sec    0    217 KBytes       
[  7]   1.00-2.00   sec  53.7 MBytes  54968 KBytes/sec    0    216 KBytes       
[SUM]   1.00-2.00   sec   107 MBytes  109918 KBytes/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   2.00-3.00   sec  53.8 MBytes  55137 KBytes/sec    0    217 KBytes       
[  7]   2.00-3.00   sec  53.8 MBytes  55122 KBytes/sec    0    216 KBytes       
[SUM]   2.00-3.00   sec   108 MBytes  110259 KBytes/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   3.00-4.00   sec  54.0 MBytes  55244 KBytes/sec    0    217 KBytes       
[  7]   3.00-4.00   sec  53.8 MBytes  55099 KBytes/sec    0    216 KBytes       
[SUM]   3.00-4.00   sec   108 MBytes  110344 KBytes/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   4.00-5.00   sec  53.9 MBytes  55244 KBytes/sec    0    217 KBytes       
[  7]   4.00-5.00   sec  54.0 MBytes  55289 KBytes/sec    0    216 KBytes       
[SUM]   4.00-5.00   sec   108 MBytes  110532 KBytes/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   5.00-6.00   sec  53.6 MBytes  54908 KBytes/sec    0    217 KBytes       
[  7]   5.00-6.00   sec  53.4 MBytes  54711 KBytes/sec    0    216 KBytes       
[SUM]   5.00-6.00   sec   107 MBytes  109619 KBytes/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   6.00-7.00   sec  53.7 MBytes  54969 KBytes/sec    0    217 KBytes       
[  7]   6.00-7.00   sec  53.4 MBytes  54702 KBytes/sec    0    216 KBytes       
[SUM]   6.00-7.00   sec   107 MBytes  109671 KBytes/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   7.00-8.00   sec  54.0 MBytes  55323 KBytes/sec    0    217 KBytes       
[  7]   7.00-8.00   sec  54.0 MBytes  55307 KBytes/sec    0    216 KBytes       
[SUM]   7.00-8.00   sec   108 MBytes  110630 KBytes/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   8.00-9.00   sec  53.4 MBytes  54704 KBytes/sec    0    217 KBytes       
[  7]   8.00-9.00   sec  53.4 MBytes  54636 KBytes/sec    0    216 KBytes       
[SUM]   8.00-9.00   sec   107 MBytes  109339 KBytes/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   9.00-10.00  sec  53.4 MBytes  54721 KBytes/sec    0    217 KBytes       
[  7]   9.00-10.00  sec  53.5 MBytes  54735 KBytes/sec    0    216 KBytes       
[SUM]   9.00-10.00  sec   107 MBytes  109456 KBytes/sec    0             
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec   538 MBytes  55053 KBytes/sec    0             sender
[  5]   0.00-10.00  sec   537 MBytes  55012 KBytes/sec                  receiver
[  7]   0.00-10.00  sec   537 MBytes  54986 KBytes/sec    0             sender
[  7]   0.00-10.00  sec   537 MBytes  54962 KBytes/sec                  receiver
[SUM]   0.00-10.00  sec  1.05 GBytes  110039 KBytes/sec    0             sender
[SUM]   0.00-10.00  sec  1.05 GBytes  109974 KBytes/sec                  receiver

iperf Done.