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Iperf or Iperf like test points?
- From: Walter C. Ames
- Date: Wed Aug 24 14:11:07 2005
Initial caveat: If this is off topic please just let me know now and
please suggest a good forum for this type of question/discussion.
The main premise of the question/discussion is the ability to
establish/utilize random (or not so) test points (like looking
glasses) scattered across the planet to gauge real time bandwidth
performance on larger broadband connections.
Second caveat: I have done a bit a research trying to figure this
out before posting and have had no luck to this point. If this topic
has already been covered in depth or otherwise please advise.
With that said, the problem that I am facing is that there are no
consistently reliable tools that NetOps (or end users for that
matter) can use to truly evaluate bandwidth performance on large pipes.
Ex: All of the test sites that I have tried from a 100M/FD attached
Linux box, riding a GigE backbone to multiple GigE transit lines
typically yields BW test results in the 3-7Mbps range. Yet when I
Iperf across the backbone I get more reasonable results of between
The extent of the problem is that I hand off 10M - GigE connections
to my end users and they want a way to test it that is 'Off-Net'. My
on-net test platforms give them great results, however since they are
on-net the end users dismiss the results (thinking they are fixed I guess).
To date I have not found a reasonable method of accomplishing this.
Now with the understanding that bandwidth testing at these rates (or
any rate for that matter) can prove to be a complete waste of
bandwidth simply to give someone a warm and fuzzy, I am willing to
let that one go on a case by case basis to simply make the end user happy.
That being said, is anyone on this list aware of such a formation of
Iperf nodes across the net connected at GigE or better to accomplish
this goal? If not I would be willing to start one and give up a
server or two and some of my bandwidth to help others out who are
probably experiencing (or have experienced) this type of problem in the past.
This issue is just burning up a lot of my tech supports time trying
to educate the end users. I just feel that a cooperative effort that
yields more accurate and consistent results may be a better way to
Thank you in advance.
o Walter C. Ames
o MDConnect Internet Services
o (410)290-8088 (phone) MD
o (410)290-8180 (fax)