Check Network Bandwidth with iperf
2013/07/23 |
Install and Check Network Bandwidth with iperf
This needs 2 machine, Client(Sender) and Server(Receiver). |
|
[1] | Install iperf3 (Install on both Client and Server) |
[root@dlp ~]# yum --enablerepo=epel -y install iperf3 # install from EPEL
|
[2] | Execute the command on the Server like follows. It's possible to specify the listening port to add "-p (port number)". If not specified. default port(5201) is used like follows. |
[root@dlp ~]# iperf3 -s ----------------------------------------------------------- Server listening on 5201 ----------------------------------------------------------- |
[3] | Check Network Bandwidth to execute the command like follows. The example below shows 860 MBytes data are sent/received and the bandwidth was 721Mbps. |
# iperf3 -c (client's hostname or IP address) [root@dlp ~]# iperf3 -c 10.0.0.253 Connecting to host 10.0.0.253, port 5201 [ 4] local 10.0.0.31 port 53389 connected to 10.0.0.253 port 5201 [ ID] Interval Transfer Bandwidth Retransmits [ 4] 0.00-10.01 sec 860 MBytes 721 Mbits/sec 223 [ ID] Interval Transfer Bandwidth Retransmits Sent [ 4] 0.00-10.01 sec 860 MBytes 721 Mbits/sec 223 Received [ 4] 0.00-10.01 sec 860 MBytes 721 Mbits/sec iperf Done. |
[4] | Basic Usage are like above. But there are many options like below. Try to do. |
[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 -V, --verbose more detailed output -J, --json output in JSON format -d, --debug debug mode -v, --version show version information and quit -h, --help show this message and quit Server specific: -s, --server run in server mode Client specific: -c, --client <host> run in client mode, connecting to <host> -u, --udp use UDP rather than TCP -b, --bandwidth #[KMG] for UDP, bandwidth to send at in bits/sec (default 1 Mbit/sec) -t, --time # time in seconds to transmit for (default 10 secs) -n, --num #[KMG] number of bytes to transmit (instead of -t) -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 <host> bind to a specific interface or multicast address -M, --set-mss # set TCP maximum segment size (MTU - 40 bytes) -N, --nodelay set TCP no delay, disabling Nagle's Algorithm -6, --version6 use IPv6 -S, --tos N set the IP 'type of service' -Z, --zerocopy use a 'zero copy' method of sending data [KMG] indicates options that support a K/M/G suffix for kilo-, mega-, or giga- |