You can use the Test TCP utility (TTCP) to measure TCP throughput through an IP path. In order to use it, start the receiver on one side of the path, then start the transmitter on the other side. The transmitting side sends a specified number of TCP packets to the receiving side. At the end of the test, the two sides display the number of bytes transmitted and the time elapsed for the packets to pass from one end to the other. You can then use these figures to calculate the actual throughput on the link. For general information on TTCP, refer to Network Performance Testing with TTCP .

The TTCP utility can be effective in determining the actual bit rate of a particular WAN or modem connection. However, you can also use this feature to test the connection speed between any two devices with IP connectivity between them.

Server:./ttcp -r -s -p 9999

Client: ./ttcp -s -p 9999 < /boot/vmLinuz