nanog mailing list archives
Re: Stress Testing LAN/WAN
From: Brad Fleming <bdfleming () kanren net>
Date: Thu, 4 Dec 2008 17:37:38 -0600
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 ofinitiating 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.
-- Brad Fleming Network Engineer Kansas Research and Education Network Office: 785-856-9800 x.222 Moblie: 785-865-7231 NOC: 866-984-3662
Current thread:
- Stress Testing LAN/WAN Brian Feeny (Dec 04)
- Re: Stress Testing LAN/WAN Nathan Ward (Dec 04)
- RE: Stress Testing LAN/WAN Stephens, Josh (Dec 04)
- RE: Stress Testing LAN/WAN Holmes,David A (Dec 04)
- RE: Stress Testing LAN/WAN Stephens, Josh (Dec 04)
- Re: Stress Testing LAN/WAN Brad Fleming (Dec 04)
- Re: Stress Testing LAN/WAN Jon Meek (Dec 04)
- RE: Stress Testing LAN/WAN Stephens, Josh (Dec 04)
- Re: Stress Testing LAN/WAN Nathan Ward (Dec 04)