With iperf, you can use the -d option to initiate a "real-time parallel" test (my term). You can also use the -r option to run a "trade-off parallel" test (again, my term). To see the other options iperf offers: http://pirlwww.lpl.arizona.edu/resources/guide/software/iperf/ Sounds like you might also be interested in the -B option. When coupled with multiple interfaces, you can pretty easily test QoS configs by sourcing from different interfaces / IPs (if that's your identifying characteristic). KanREN uses iperf on Mac Minis running OSX 10.5 with great results. The newer Minis can pretty easily push 950+Mbps if you run 4 or more streams (-n option). Or at least that has been our experience. I would also suggest doing some TCP buffer tuning if you anticipate round-trip latency to be >20ms. Here are some general guidelines for various platforms: http://fasterdata.es.net/TCP-tuning// On Dec 4, 2008, at 5:08 PM, Holmes,David A wrote:
I have used Solarwinds Wan Killer, but have yet to discover a method of initiating round-trip traffic from a single generator, but Solarwinds can stress a GiGE MAN link using a desktop PC with a GiGE card as the generator.
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