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Re: NDT and protocol error on S2C check


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  • From: Carlos Vicente <>
  • To: ndt-users <>
  • Subject: Re: NDT and protocol error on S2C check
  • Date: Tue, 21 Apr 2009 08:45:37 -0700

The other question I have is: isn't web100_userland-1.7 supposed to have
the v6 bug fixed? Running without '-4' does not work at all.

What do I need to tweak to make tests over IPv6 work?

Thanks,

cv


> Carlos Vicente wrote:
> > Hi Rich and others,
> >
> > I just installed NDT here at UO.
> >
> > I'm running with:
> >
> > /usr/local/sbin/web100srv -a --snaplog --tcpdump -4
> >
> > The problem is that I'm getting a protocol error when running the S2C
> > test (this is from my Ubuntu desktop machine):
> >
> > # sudo web100clt -4 -l -n netspeed.uoregon.edu
> > Testing network path for configuration and performance problems --
> > Using IPv4 address
> > Checking for Middleboxes . . . . . . . . . . . . . . . . . . Done
> > checking for firewalls . . . . . . . . . . . . . . . . . . . Done
> > running 10s outbound test (client to server) . . . . . 901.99 Mb/s
> > Protocol error!
> > S2C throughput test FAILED!
> > Protocol error!
> >
> > This happens with some clients and not with others. Testing with a
> > laptop running MS Vista, using Firefox, I get no errors.
> >
> > Here are the different versions of things on the server:
> >
> > RedHat AS 5.3
> > Linux kernel 2.6.20-10.3web100smp
> > ndt 3.5.0
> > web100_userland-1.7
> > javac 1.6.0_13
> >
> > I tried disabling iptables on both the server and the client, but that
> > does not fix it.
> >
> > I can provide a pcap file of a failed test, captured on the client
> > machine, in case that helps.
> >
> > Any help greatly appreciated.
> >
> > =====================================================================
> > Carlos Vicente Tel : +1(541) 346-1763
> > Network Engineer Fax : +1(541) 346-4397
> > Information Services PGP ID : 8623D99C
> > 1212 University of Oregon
> > Eugene,OR 97403-1205
> >
> >
> >



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