[89370] in North American Network Operators' Group
Re: UDP Badness [Was: Re: How to measure network quality&performance for voip&gameservers (udp packetloss, delay, jitter,...)]
daemon@ATHENA.MIT.EDU (tony sarendal)
Fri Mar 10 06:53:10 2006
Date: Fri, 10 Mar 2006 11:52:40 +0000
From: "tony sarendal" <dualcyclone@gmail.com>
To: nanog@nanog.org
In-Reply-To: <20060310221425.0709dac8.random@72616e646f6d20323030342d30342d31360a.nosense.org>
Errors-To: owner-nanog@merit.edu
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On 10/03/06, Mark Smith <
random@72616e646f6d20323030342d30342d31360a.nosense.org> wrote:
>
> On Tue, 7 Mar 2006 23:33:44 +0000
> "tony sarendal" <dualcyclone@gmail.com> wrote:
>
> > On 07/03/06, Gunther Stammwitz <gstammw@gmx.net> wrote:
> > >
> > >
> > > Well that's true but Iperf won't show you at which time a loss
> occured. It
> > > will simply print out the results when the test has been finished. I
> need
> > > something well more accurate that can also tell me which hop is
> causing
> > > the
> > > problems.
> > >
> > > Last I checked I got the time from Iperf, even if it was indirectly.
> > A tool that shows which hop in the network that has problems forwarding
> > certain traffic ? Awesome, I want one of those.
> >
>
> traceroute ? :-) (sorry, couldn't resist)
Does traceroute really do that ? Even for ICMP.
Think about it.
Hint: the return packets your traceroute produces,
do they have the same return path for every hop ?
Think Internet, think large providers with many peerings.
/Tony
--
Tony Sarendal - tony@polarcap.org
IP/Unix
-=3D The scorpion replied,
"I couldn't help it, it's my nature" =3D-
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<div><span class=3D"gmail_quote">On 10/03/06, <b class=3D"gmail_sendername"=
>Mark Smith</b> <<a href=3D"mailto:random@72616e646f6d20323030342d30342d=
31360a.nosense.org">random@72616e646f6d20323030342d30342d31360a.nosense.org=
</a>
> wrote:</span>
<blockquote class=3D"gmail_quote" style=3D"PADDING-LEFT: 1ex; MARGIN: 0px 0=
px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">On Tue, 7 Mar 2006 23:33:44 +000=
0<br>"tony sarendal" <<a href=3D"mailto:dualcyclone@gmail.com"=
>
dualcyclone@gmail.com</a>> wrote:<br><br>> On 07/03/06, Gunther Stamm=
witz <<a href=3D"mailto:gstammw@gmx.net">gstammw@gmx.net</a>> wrote:<=
br>> ><br>> ><br>> > Well that's true but Iperf won't sho=
w you at which time a loss occured. It
<br>> > will simply print out the results when the test has been fini=
shed. I need<br>> > something well more accurate that can also tell m=
e which hop is causing<br>> > the<br>> > problems.<br>> >
<br>> > Last I checked I got the time from Iperf, even if it was indi=
rectly.<br>> A tool that shows which hop in the network that has problem=
s forwarding<br>> certain traffic ? Awesome, I want one of those.<br>
><br><br>traceroute ? :-) (sorry, couldn't resist)</blockquote>
<div> </div>
<div>Does traceroute really do that ? Even for ICMP.</div>
<div>Think about it.</div>
<div> </div>
<div>Hint: the return packets your traceroute produces,</div>
<div>do they have the same return path for every hop ?</div>
<div> </div>
<div>Think Internet, think large providers with many peerings.</div>
<div> </div>
<div>/Tony</div></div><br>-- <br>Tony Sarendal - <a href=3D"mailto:tony@pol=
arcap.org">tony@polarcap.org</a><br>IP/Unix<br> &nbs=
p; -=3D The scorpion replied,<br> =
"I couldn't help it, =
it's my nature" =3D-<br>
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