IPERF(1) User Commands IPERF(1)

NAME
iperf - measure network performance

SYNOPSIS
iperf [-s|-c host] [options]

iperf [-h|--help] [-v|--version]

DESCRIPTION
Client/Server:
-f, --format
[kmKM] format to report: Kbits, Mbits, KBytes, MBytes

-i, --interval
# seconds between periodic bandwidth reports

-l, --len
#[KM] length of buffer to read or write (default 8 KB)

-m, --print_mss
print TCP maximum segment size (MTU - TCP/IP header)

-p, --port
# server port to listen on/connect to

-u, --udp
use UDP rather than TCP

-w, --window
#[KM] TCP window size (socket buffer size)

-B, --bind
<host> bind to <host>, an interface or multicast address

-C, --compatibility
for use with older versions does not sent extra msgs

-M, --mss
# set TCP maximum segment size (MTU - 40 bytes)

-N, --nodelay
set TCP no delay, disabling Nagleās Algorithm

-V, --IPv6Version
Set the domain to IPv6

Server specific:
-s, --server
run in server mode

-U, --single_udp
run in single threaded UDP mode

-D, --daemon
run the server as a daemon

Client specific:
-s, --server
run in server mode

-U, --single_udp
run in single threaded UDP mode

-D, --daemon
run the server as a daemon

Client specific:
-b, --bandwidth #[KM]
for UDP, bandwidth to send at in bits/sec (default 1 Mbit/sec, implies -u)

-c, --client
<host> run in client mode, connecting to <host>

-d, --dualtest
Do a bidirectional test simultaneously

-n, --num
#[KM] number of bytes to transmit (instead of -t)

-r, --tradeoff
Do a bidirectional test individually

-t, --time
# time in seconds to transmit for (default 10 secs)

-F, --fileinput <name>
input the data to be transmitted from a file

-I, --stdin
input the data to be transmitted from stdin

-L, --listenport #
port to recieve bidirectional tests back on

-P, --parallel
# number of parallel client threads to run

-T, --ttl
# time-to-live, for multicast (default 1)

Miscellaneous:
-h, --help
print this message and quit

-v, --version
print version information and quit

[KM] Indicates options that support a K or M suffix for kilo- or mega-

The TCP window size option can be set by the environment variable TCP_WINDOW_SIZE. Most other options can be set by an environment variable
IPERF_<long option name>, such as IPERF_BANDWIDTH.

REPORTING BUGS
Report bugs to <dast@nlanr.net>

iperf 2.0.1 November 2004 IPERF(1)
Manual page iperf(1) line 52/112 (END)