[c-nsp] Prove it's not the network!

[Murphy, William]

Our environment is probably very different than yours, but we use
Netscout nGenius...  If the user does not believe the pretty graphs we
show them then we bring out the big guns...  We use Network Performance
Toolkit available through I2.  They have a nice bootable Knoppix version
you can boot on any PC using CD and thumb drive.  You can have the user
run test against the diagnostic tool from their web browser or you can
run your own tests...

 Bill Murphy
Senior Network Analyst
University of Texas Health Science Center - Houston


-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Rick Martin
Sent: Tuesday, May 13, 2008 10:16 AM
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] Prove it's not the network!


 I know this is not really a Cisco specific question but it is
definitely in support of Cisco hardware. 

 How do most of you folks prove that "the problem" is not the network?
We utilize CA Spectrum and eHealth for availability and statistical
analysis but in some instances that does not cut it. We don't typically
have much trouble proving that a T1 is serving up 1.5 meg of bandwidth.
Customers complain that their access is slow, we show that they are
using all available bandwidth and eventually sell them more bandwidth
and the problem is resolved.

 The more difficult effort is when there is plenty of available
bandwidth and a particular application is slow (Outlook in the case I am
involved in now). This is a very high level political official and we
must come to a resolution. All tools we have available to us today
indicate that there is not a problem with the network. Typical
utilization on the T1 is about 500 to 600K peak during the day. Certain
management continues to point the finger at the network. We have used
Internet based speed tests that at times show less than 1.5Meg download
speeds, I explain the variables in the Internet and the particular tool
in use as well as local contention for the bandwidth etc to no avail,
once they see less than 1.5 meg speed the finger points to the network.
I still must somehow "prove" that the network is not the issue. 

 I am interested in an Internet speed test like tool to install at the
core of our network that would provide a sustained upload or download
test that would run for longer periods of time than a regular speed
test. I would like to fill the pipe while graphing in Ehealth or as part
of the selected tool to prove that the contracted bandwidth is available
in both directions.

 Any recommendations for products would be appreciated. We are currently
looking at SolarWinds WAN Killer and a traffic generator from Omnicore
LanTraffic V2. I am also open to different "types" of solutions to point
to where the problem is actually located. 

Thanks in advance for any suggestions

Rick Martin
Network Engineer
State of Arkansas, Department of Information Systems
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