Iperf
http://iperf.sourceforge.net/
Windows Iperf Installation - http://www.noc.ucf.edu/Tools/Iperf/
C:\iperf.exe -help
Usage: iperf [-s|-c host] [options]
iperf [-h|--help] [-v|--version]
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)
-o, --output output the report or error message to this specifie
d file
-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 bind to , 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 Nagle's Algorithm
-V, --IPv6Version Set the domain to IPv6
Server specific:
-s, --server run in server mode
-D, --daemon run the server as a daemon
-R, --remove remove service in win32
Client specific:
-b, --bandwidth #[KM] for UDP, bandwidth to send at in bits/sec
(default 1 Mbit/sec, implies -u)
-c, --client run in client mode, connecting to
-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 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_, such as IPERF_BANDWIDTH.
Network Speed
http://www.optimumx.com/downloads.html
C:\netspeed.exe /?
Network Speed [Version 1.40]
Calculates the network speed (transfer rate) between two winsock hosts.
The syntax of this command is:
netspeed.exe /H:host|/S[:n] [/P:n] [/M:n] [/C:y|n]
/H:host : Client mode, host=name/address of a machine waiting in server mode.
/S:n : Server mode, n=# of times to answer before exiting, default is 9999
/P:n : n=Port number, default is 7777. (Both client & server must match)
/M:n : n=Megabytes to transfer, default is 10. (Only valid in client mode)
/C:y,/C:n: y=The data sent will be compressible; n=Not compressible (default).
Jperf 2.0.0
Графическая оболочка удобна при настройке всех параметров.  Рисует наглядный график пропускной способности.

Download Jperf 2.0.0