TTCP (network throughput test) - Linux

• Used to generate synthetic UDP and TCP traffic loads.The ttcp command is an essential utility program for debugging  problems in IP networks.

• In order to run the ttcp tool, you must set up a ttcp  receiver on one host and then a ttcp sender on another host. When the ttcp sender is started, it blasts the specified amount of data as fast as possible to the ttcp receiver.

• By default, ttcp transmits data over a  TCP connection. The ttcp sender opens a TCP connection to a ttcp receiver, transmits data, and then closes the connection. The ttcp receiver must be running when the ttcp sender is started. UDP data transfer is specified with the -u option. Since UDP is a connectionless protocol, the ttcp sender starts immediately sending UDP datagrams, regardless of whether a ttcp receiver is established.

• ttcp -t [-u] [-s] [-p port] [-l buflen] [-b size] [-n numbufs] [-A align] [-O offset] [-f format][-D] [-v] host [<in]

• ttcp -r [-u] [-s] [-p port] [-l buflen] [-b size] [-A align] [-O offset] [-f format] [-B] [-T] [-v] [>out]

• http://linux.die.net/man/1/ttcp

• Example command for transmitting data with UDP:

Transmitting data with UDP consists of setting up a UDP data transfer between two hosts, PC1 and PC2.

• Example command for transmitting data with TCP: