ndt-users list created

[Richard Carlson <>]

Hi Chia-Hung;

I'm the developer of the NDT tester and I got this via the bounce mechanism 
on the  mail server.  I'm in the process of moving this email 
list to the  server, and I've cc:ed it on this reply.

To answer your question.  The NDT server uses a packet-dispersion algorithm 
to gather the bottleneck link information.  It fork()'s a child process to 
handle the measurements via the libpcap library routines.  This means the 
NDT 'web100srv' process must be run as root, to allow it raw access to the 
local NIC.

There are 2 possible reasons you can get this message.

1) your server has multiple interfaces and the NDT server is monitoring eth0.
        Use the -i dev option to specify the correct interface
        for example "/usr/local/sbin/web100srv -i eth1 -a >& /dev/null" 
tells the
                web100srv process to monitor eth1 instead of eth0

2) the web100srv process is not running as root.
        Change your startup procedure to have root start the web100srv process

I hope this helps.

Rich Carlson


From: "Chia-Hung Hsu" 
<>
To: 
<>
Subject: help
Date: Thu, 16 Sep 2004 14:38:15 +0800
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hello,
  i am new in ndt.
  after starting my ndt test , i have a message that "Server unable to =
determine bottleneck link type."=20
 what's wrong with my system?
 help me please
http://140.110.20.56:7123/


thanks for your help
best regards

HSU