Re: Iperf results vary when roles of client and server are interchanged

To: iperf-users --at-- dast.nlanr.net
Subject: Re: Iperf results vary when roles of client and server are interchanged
From: ayan ghosh <ayansworld78 --at-- yahoo.co.in>
Date: Fri, 29 Jul 2005 20:54:30 +0100 (BST)
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Hi mate,

I tried running Iperf in 2 laptops(Win 2000) but got only 10 mbps thorughput using a Ethernet Cable. I have checked the network settings of the laptops and it is configured for 100 mbps. Do you know any reason why this could happen?

Ayan

chidambaram <cperiyak --at-- yahoo.com> wrote:

Hello,

I have a windowsXP machine and a linux machine
connected back-to-back on gig interface.
The interfaces are auto-negotiate and are running as
1000Mbps Full duplex.

When I run iperf with windows as client and unix as
server I get 660 Mbps throughput.

But if I reverse the role of client and server I get
very less throughput.Ie if I make windows as Server
and linux as Client I get 185 Mbps.I tried varying the
TCP Windows size and it doesnt seem to have any
impact.

Could someone help me to figure out why I see this
kind
of varying behavior.

Thanks

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Follow-Ups:
- Re: Iperf results vary when roles of client and server are interchanged
  - From: Paul Hyder

References:
- Iperf results vary when roles of client and server are interchanged
  - From: chidambaram

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