[c-nsp] Centos upload speed slower on 1000m than 100m over WAN links

[Arie Vayner (avayner)]

Paul,

Gert's test should help us to see if there is any policing being done on
the WAN link.
The problem I am aiming at is not due to not enough BW, but due to
dropping bursts due to policing (or not enough buffers, as Gert is
referring).

Another test to do, just to make sure this problem is coming from the
WAN side, is to keep the server on the original access switch (not the
6500) and place your test client on the 6500. Can you please try that as
well?

Tnx
Arie

-----Original Message-----
From: Gert Doering [mailto:gert at greenie.muc.de] 
Sent: Sunday, June 27, 2010 12:06
To: Paul
Cc: Arie Vayner (avayner); cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] Centos upload speed slower on 1000m than 100m over
WAN links

Hi,

On Sun, Jun 27, 2010 at 04:55:20AM -0400, Paul wrote:
> Oh and to verify some things i used iperf and send big batch of udp 
> traffic at 500mbit/s and it made it with 0.004% packet loss so the 
> bandwidth through to the external link isn't the problem either..

Can you go up to 1gbit/s on the Level3 link?  If they do some sort of
policing, that would look like "a switch with small buffers".

gert
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