PathTest for Linux

PathTest is a free Capacity testing tool that will give you the most accurate results possible. It allows you to determine the maximum capacity Between any two network end points using Precision packet-flooding techniques to completely fill up the network path to its absolute maximum capacity. PathTest can test using TCP, UDP or ICMP protocols for either Layer 3 or layer 4 capacity testing and it support DSCP markings to adhere to your QoS policies. PathTest also lets you specify several run-time options including total packets sent, packet size, maximum allowed bandwidth, one-way or bi-directional testing and more.