ndt-users list created

[Richard Carlson <>]

Jeremy/Bill;

Just catching up from last weeks travel.  Going to the URL below 
shows that the Rutgers NDT/NPAD server needs to be tuned to support 
larger TCP buffers.  The following lines can be added to your 
/etc/sysctl.conf file to overcome this problem


# NEW parameter for 2.6.13 kernels.  Set to Reno style CC
net.ipv4.tcp_congestion_control = reno

# TCP Tuning data added 7/28/05 RAC
# increase Linux TCP buffer limits
net.core.rmem_max = 33554432
net.core.wmem_max = 33554432
net.core.rmem_default = 65536
net.core.wmem_default = 65536

# increase Linux autotuning TCP buffer limits
net.ipv4.tcp_rmem = 4096 87380 16777216
net.ipv4.tcp_wmem = 4096 65535 16777216

Add the above lines and the run the "sudo /sbin/sysctl -p" command to 
set the new values.

Rich

At 04:25 PM 3/7/2008, Jeremy Schafer wrote:
> Have you tried this URL?
> http://ndt-nbp.rutgers.edu:8200/ServerData/pdb-a-linux-3.rutgers.edu:2008-03-07-20:09:59.html
>
>
> Bill Abbott wrote:
> > I ran diag-client against this url from the server, here's the output:
> > # ./diag-client ndt-nbp.rutgers.edu 8100 90 150
> > Using: rtt 90 ms and rate 150
> > Connected.
> > Control connection established.
> > port = 8003
> > Starting test.
> > peakwin=1688029 minpackets=3 maxpackets=1027 stepsize=256
> > Target run length is 2771751 packets (or a loss rate of 0.00003608%)
> > Requested DBP exceeds 1048576
> > Test 1a (5 seconds): Coarse Scan
> > Test 1b (5 seconds): ...
> > report url ServerData/pdb-a-linux-3.rutgers.edu:2008-03-07-20:09:59.html
> >
> > I can't seem to get the page via browser, though, either the 
> > default page or the url above.
> --
> Jeremy Schafer
> Network Architecture & Applications
> AIM: ruoitjeremy
> RUIM: jschafer

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Richard A. Carlson                              e-mail: 

Network Engineer                                phone:  (734) 352-7043
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