ndt-users list created

[Clarke Morledge <>]

I am trying to interpret some of the output from NDT (v5.4.8) that 
indicates assymetrical performance variance.   The key component for me is 
the line below:

"No packet loss - but packets arrived out-of-order 12.58% of the time"

But the problem I have is that it isn't clear to me where the packets are 
arriving out-of-order.  In this case I am assuming that it is from the 
client-to-server direction, but could there also be some out-of-order in 
the server-to-client direction, too?  The output isn't clear.

However, is the packets arriving out-of-order component really helping me 
to diagnose the assymetry problem, or is this a red herring?  Is there 
some relevant web-100 variable(s) that I should be looking at instead?

Thanks.
-----------------------

WEB100 Enabled Statistics:
Checking for Middleboxes . . . . . . . . . . . . . . . . . .  Done
checking for firewalls . . . . . . . . . . . . . . . . . . .  Done
running 10s outbound test (client-to-server [C2S]) . . . . . 40.08Mb/s
running 10s inbound test (server-to-client [S2C]) . . . . . . 134.32Mb/s

   ------  Client System Details  ------
OS data: Name = Windows XP, Architecture = x86, Version = 5.1
Java data: Vendor = Sun Microsystems Inc., Version = 1.6.0_02

   ------  Web100 Detailed Analysis  ------
622 Mbps OC-12 link found.
Link set to Full Duplex mode
No network congestion discovered.
Good network cable(s) found
Normal duplex operation found.

Web100 reports the Round trip time = 3.27 msec; the Packet size = 1460 
Bytes; and
No packet loss - but packets arrived out-of-order 12.58% of the time
C2S throughput test: Packet queuing detected: 0.00%
S2C throughput test: Excessive packet queuing detected: 10.87%
This connection is receiver limited 58.26% of the time.
 Increasing the the client's receive buffer (63.0 KB) will improve 
performance
This connection is sender limited 41.27% of the time.

-------------------------------------------------------------

Clarke Morledge
College of William and Mary
Information Technology - Network Engineering
Jones Hall (Room 18)
Williamsburg VA 23187