C, -congestion set TCP congestion control algorithm (Linux and FreeBSD only ) w, -window # set window size / socket buffer size R, -reverse run in reverse mode (server sends, client receives ) P, -parallel # number of parallel client streams to run cport bind to a specific client port (TCP and UDP, default: ephemeral port ) (default 128 KB for TCP, dynamic or 1460 for UDP ) l, -length # length of buffer to read or write k, -blockcount # number of blocks (packets ) to transmit (instead of -t or -n ) n, -bytes # number of bytes to transmit (instead of -t ) t, -time # time in seconds to transmit for (default 10 secs ) fq-rate # enable fair-queuing based socket pacing in pacing-timer # set the timing for pacing, in microseconds (default 1000 ) b, -bitrate # target bitrate in bits/sec ( 0 for unlimited ) (default 1 Mbit/sec for UDP, unlimited for TCP ) (optional slash and packet count for burst mode ) connect-timeout # timeout for control connection setup (ms ) X, -xbind bind SCTP association to links c, -client run in client mode, connecting to authorized-users-path path to the configuration file containing user rsa-private-key-path path to the RSA private key used to decrypt ![]() 1, -one-off handle one client connection then exit v, -version show version information and quit forceflush force flushing output at every interval B, -bind bind to the interface associated with the address F, -file name xmit/recv the specified file i, -interval # seconds between periodic throughput reports f, -format format to report: Kbits, Mbits, Gbits, Tbits p, -port # server port to listen on/connect to 0.00- 10.00 sec 2.16 GBytes 1.86 Gbits/sec receiver Getting help is easy Type the following command to run in client mode, connecting to 192.168.149.69: Step 3 – Start an iperf server on serverB (client mode) It is also possible to change the port by passing the -p option as follows (e.g. Sudo firewall-cmd -zone=public -add-port=5001/tcp -permanent See how to set up a firewall using FirewallD on CentOS 8: $ sudo ufw allow from 192.168.149.0/24 to 192.168.149.69 port 5001 proto tcpĬentOS/RHEL/Fedora users need to the port using FirewallD. See how to use ufw to open a port on Ubuntu/Debian Linux: Please note that you must open TCP port 5001 on the serverA. Type the following command to run iperf in server mode: $ sudo yum install iperf3 Step 2 – Start an iperf server on serverA (server mode) Installing iperf3 on a CentOS or RHEL 8.x server A note about installing iperf3 on a CentOS/RHEL/SL/Oracle Linux If you are using the latest version of Fedora and CentOS/RHEL 8.x try the dnf command as follows: Type the following yum command to install iperf on both servers (first turn on EPEL repo for CentOS/RHEL 7.x): $ sudo dnf install iperf3 Install iperf on a CentOS/RHEL/Oracle/Scientific Linux server $ sudo dnf install iperf A note about installing iperf3 on a CentOS/RHEL/SL/Oracle Linux Type the following dnf command to install iperf on both servers: Installing iperf on a Fedora latest/RHEL/CentOS 8 Linux server Processing triggers for libc-bin (2.31-0ubuntu9.2). Processing triggers for man-db (2.9.1-1). Selecting previously unselected package iperf3. 344807 files and directories currently installed.) ![]() ![]() Selecting previously unselected package libiperf0:amd64. Get:2 focal/universe amd64 iperf3 amd64 3.7-3 Get:1 focal/universe amd64 libiperf0 amd64 3.7-3 The following additional packages will be installed:Ġ upgraded, 2 newly installed, 0 to remove and 23 not upgraded.Īfter this operation, 294 kB of additional disk space will be used. It is also possible to install iperf3 (latest version) as follows: A note about installing iperf3 on a Debian/Ubuntu Linux Processing triggers for man-db (2.9.1- 1 ). 344795 files and directories currently installed. Selecting previously unselected package iperf. Get: 1 focal/universe amd64 iperf amd64 2.0.13+dfsg1-1build1 The following NEW packages will be installed:Ġ upgraded, 1 newly installed, 0 to remove and 23 not upgraded.Īfter this operation, 213 kB of additional disk space will be used.
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