I tried the "ultra high throughput" script just for fun to see how much I could push ... I got a solid 920 mbps stream for the entire time I run the test (circa 30-60 seconds) with not spikes. The hardware in that case were two IBM hs-20 blades with broadcom chipsets. I said for fun because if we use ixchariot for throughput tests usually is just for small T1 sites (max 3xT1) so I have never seen the issue you mentioned. Usually on the same T1, we fill the data VLAN with traffic and then we run x voice pairs on the voice vlan to validate QoS (MOS score). On Thu, Oct 28, 2010 at 5:16 PM, Jonathon Exley <Jonathon.Exley@kordia.co.nz
wrote:
How smooth is the Ixchariot data stream? When Chariot was a NetIQ product it seemed to generate regular spikes as the algorithm tried to correct the total throughput over a time interval. It's not a problem for slow data rates but when testing near the limit of a circuit's capacity the spikes could sometimes overflow the buffers of Ethernet media converters and give false results.
Jonathon
-----Original Message----- From: Stefano Gridelli [mailto:sgridelli@gmail.com] Sent: Friday, 29 October 2010 1:08 a.m. To: Diogo Montagner; Tim Jackson; nanog@nanog.org Subject: Re: Ethernet performance tests
Hi Diogo
We use ixchariot endpoints installed on linux laptops to test sites for voice readiness. Ixchariot calculates for you the MOS score and, depending from the NIC, can also push close to 1 Gig of traffic. For larger bandwidth tests (I believe 6-7 Gig) and fast re-route testing (ms failover) we use ixia hardware.
Ciao
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