A new IP traffic analysis package based on tcpdump is available via anonymous ftp from dxcoms.cern.ch in directory: pub/ip-stats The package was developed by Cecile Martel from Eurecom Institute (Sophia Antipolis - France) while she was carrying out her end of studies diploma work at CERN. The package, a set of perl scripts and a modified version of tcpdump allowing to specify the sampling rate, has been successfully used in the Cern Internet eXchange Point (CIXP) environment to study the distribution of IP traffic on a TCP/UDP port basis over extended periods of time and is also very well suited to study the traffic exchanged between network providers connected to the same IXP. Here is the content of the README file: --------------------------------------- This package contains programs developped for an IP traffic study conducted at CERN (European Laboratory for Particle Physics, Geneva, Switzerland) during the first six month of 1994. CONTENTS: doc/ Documentation + uguide.ps, uguide.tex User's guide for the programs in the perl/ directory. The postscript file can be obtained by running LaTeX two times on uguide.tex. + rapport.ps, rapport.tar Complete report of CERN IP traffic study, in french. The postscript file can be obtained by restoring the LaTeX files (tar xvf rapport.tar) and then running LaTeX two times on file main.tex + slides.tar Slides used for presentations. Some of them in french, others in english. perl/ traffic analysis programs, in perl + SUMMARY.ENGL, SUMMARY.FR Brief explanation of each perl programm usage, in english and in french. + get_traf.pl, get_traf2.pl, get_n_pack.pl, get_n_pack2.pl, red_data.pl, red_data2.pl, red_data3.pl, red_data4.pl, red_data5.pl, red_data6.pl, ana_in_out.pl, ana_proto.pl, ana_top.pl, ana_top_src.pl, transip.pl Traffic analysis programs which use the output of tcpdump to compute traffic statistics. To be run by perl (the version was 4.036) + nameserv.tar.Z Small package written at CERN optimising acces to the nameservice, needed by transip.pl. tcpdump/ prints out the headers of packets on a network interface + tcpdump-2.2.1.tar.Z tcpdump package + Stcpdump.tar modified version of tcpdump that allows sampling of packets. Olivier H. Martin - CERN - Computing and Networks Division Phone: +41-22-767-4894 Fax: +41-22-767-9085/9140