How to measure/monitor network performance
On SLES 9, what are good ways to measure network performance? I have several platforms with 1-6 Gigabit Ethernet adapters, all running SLES. I want to generate traffic into these systems, and generate traffic leaving these systems, and see (preferably in a GUI or a scrolling test window) how well the network is performing. For instance, I know that a Gigabit Ethernet adapter is capable of 125 MB/s, theoretically; I want to see how close to 125 MB/s I am getting.
I value your thoughts.