Auckland-VI trace archive |
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This is a continuous 4 1/2 days GPS-synchronized IP header trace taken by the WAND research group simultaneously at three different points in the University of Auckland Internet infrastructure. A router connects the ISP ATM switch to a 100 Mbps Ethernet hub (Allied Telesyn CentreCOM FH812u V2i), which is linked via the firewall to a second identical hub. The very first trace, however, was taken when the DMZ was still working at 10 Mbps utilizing two 3Com hubs instead of the Allied Telesyn types. One pair of Dag3 ATM cards tapped the link between the ISP and the ATM switch. A third Dag3 Ethernet card was connected with its port 0 to the first hub representing outside DMZ and with its port 1 to the second hub representing inside DMZ. Given this configuration the Dag cards monitored the complete University of Auckland Internet traffic. The timekeeping precision of the Dag timestamping engine, called the DUCK, has been monitored during the entire duration of the trace and is guaranteed to be less than 1 microsecond to UTC at all times. Trace records are of 64 bytes fixed length, containing full TCP/IP and UDP/IP headers in most cases. To process Dag traces, a toolkit called dagtools has been developed and is available from the Dag software website. The toolkit contains a range of tools from simple dump utilities to view the content of the trace, to converters (tcpdump/libpcap) and statistic generators. All graphs illustrating these traces have been generated by tools that are part of this toolkit. Traces onlineTraces are available both via FTP and HTTP: MD5 checksums for these files can be obtained via the following link: We are also publishing the image for the CDROM that was previously attached to the Network Analysis Times March 2002, Vol.3(1) which was distributed on the occasion of the PAM2002 Passive and Active Measurement Workshop The image can be downloaded as follows:
A paper exploring the content of this data set is: Klaus Mochalski, Jörg Micheel and Stephen Donnelly: Packet Delay and Loss at the Auckland Internet Access Path, Proceedings of the PAM2002 Passive and Active Measurement Workshop, Fort Collins, Colorado, USA, March, 25-26th, 2002 PDF (956KB). The following table supplies the corresponding graphs for each trace file.
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