<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii">
<TITLE>Message</TITLE>
<META content="MSHTML 6.00.2800.1106" name=GENERATOR></HEAD>
<BODY>
<DIV><SPAN class=746480622-01052003><FONT face=Arial color=#0000ff size=2>Older
implementations of pathload, pathchirp, pipechar appear to work pretty well up
to OC3 limits. There is a new version of pathload (see <A
href="http://www.cc.gatech.edu/fac/Constantinos.Dovrolis/pathload.html">http://www.cc.gatech.edu/fac/Constantinos.Dovrolis/pathload.html</A>)
that I believe is aimed at working at higher speeds, but we have not had a
chance to try it. There is also ABwE (see <A
href="http://moat.nlanr.net/PAM2003/PAM2003papers/3781.pdf">http://moat.nlanr.net/PAM2003/PAM2003papers/3781.pdf</A>)
which appears to work in most cases up to many hundreds of Mbits/s, however it
is not packaged to be a downloadable tool yet. Beyond the Gbits/s rates, inter
packet timing becomes difficult and interrupt coalescing can cause
problems.</FONT></SPAN></DIV>
<BLOCKQUOTE style="MARGIN-RIGHT: 0px">
<DIV></DIV>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left><FONT
face=Tahoma size=2>-----Original Message-----<BR><B>From:</B> Atsuo J.
[mailto:atsuo_j@yahoo.com] <BR><B>Sent:</B> Thursday, May 01, 2003 2:36
PM<BR><B>To:</B> end2end-interest@postel.org<BR><B>Subject:</B> [e2e]
packet-pair probe implementation<BR><BR></FONT></DIV>
<DIV>Is the packet-pair probe (bandwidth estimation) technique
(introduced by Keshav and revised by Paxson) really useful in the realistic
network?</DIV>
<DIV>Does anybody test it on the real testbed? </DIV>
<DIV>Also, are there any real implementation/usage of this technique at
all?</DIV>
<DIV> </DIV>
<DIV>Your suggestions will be very appreciated.</DIV>
<DIV> </DIV>
<DIV>Atsuo</DIV>
<P>
<HR SIZE=1>
Do you Yahoo!?<BR><A
href="http://us.rd.yahoo.com/search/mailsig/*http://search.yahoo.com">The New
Yahoo! Search</A> - Faster. Easier. Bingo. </BLOCKQUOTE></BODY></HTML>