Iperf

wikipedia:iperf perform network throughput tests.

• Man page: https://www.mankier.com/1/iperf
• iperf --help

Options:

• --dualtest
• --enhanced
• --tradeoff or -r
• --window n[kmKW]

Examples

• iperf -c 10.10.10.2
• iperf -c 10.10.10.2 -i 1
• iperf -c 10.10.10.2 --tradeoff

sudo apt-get install iperf
iperf -s
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------ 

iperf -c <address of other computer>
iperf --enhanced -c <address of other computer> or  iperf -e -c <address of other computer>

iperf -c 10.10.10.2
------------------------------------------------------------
Client connecting to 10.10.10.2, TCP port 5001
TCP window size:  129 KByte (default)
------------------------------------------------------------
[  4] local 10.10.10.50 port 50027 connected with 10.10.10.2 port 5001
[ ID] Interval       Transfer     Bandwidth
[  4]  0.0-10.0 sec  3.09 GBytes  2.65 Gbits/sec

 iperf -c 10.10.10.2 --tradeoff

iperf --enhanced -c 10.10.10.1 or  iperf -e -c 10.10.10.1
------------------------------------------------------------
Client connecting to 10.10.10.1, TCP port 5001 with pid 2051443
Write buffer size:  128 KByte
TCP window size:  136 KByte (default)
------------------------------------------------------------
[  3] local 10.10.10.5 port 33910 connected with 10.10.10.1 port 5001 (ct=3.18 ms)
[ ID] Interval            Transfer    Bandwidth       Write/Err  Rtry     Cwnd/RTT        NetPwr
[  3] 0.0000-10.0110 sec  88.0 MBytes  73.7 Mbits/sec  704/0          1       -1K/1322 us  6972.29

Related commands

• nc
• ping
• pv </dev/zero | ssh REMOTE_SERVER 'cat >/dev/null'
• iperf2, iperf3
• netperf

See also

• TCP/IP, Transport protocol, UDP, SCTP, QUIC, subnet mask, Routing protocols: BGP, routing table, Policy based routing, multicast, TCP Fast Open, RDP, TTL, RTT, MPTCP, Large send offload (LSO): (TSO, GRO, GSO, TCP checksum), ethtool, SCTP, 5-Tuple, Check TCP connectivity, TCP window size, /proc/sys/net/ipv4/tcp_rmem, ack, List of TCP ports, localhost, broadcast address
• Network performance: iperf, nload, iftop, iptraf-ng, nethogs, bmon, slurm, collectl, collectd, speedometer, VnStat, Darkstat, Monitorix, mrtg, mrt, traceroute, munin, smokeping, sar -n, ping, fping, nping, Jitter, fast.com
• Network monitoring: Cacti, PRTG, MRTG, ntop, ntopng, ping, nethogs, netperf
• Performance: perf, strace, Dtrace, SystemTap, iperf, uperf, cgroups, netperf, sysbench, Queries Per Second (QPS), PerfKitBenchmarker, Load testing