November 14, 2004
HPWREN network traffic traces available via NLANR/MNA's PMA server
The HPWREN backbone instrumentation includes capabilities for on demand and regular passive and active measurements which facilitate network research activities. In addition, these data sets are also critical to the engineering and operation of the infrastructure.
A fairly recent addition is the capability to create daily traffic
traces at the interface between HPWREN and the Internet at the San
Diego Supercomputer Center (SDSC). To allow for this, a packet
tracing machine is connected to the two interfaces that terminate
wireless links at SDSC. The longer term storage for the data is
facilitated by the Measurement and Network Analysis project of the
National Laboratory for Applied Network Research (NLANR/MNA, http://mna.nlanr.net), specifially
via its Passive Measurement and
Analysis component, to which the daily traces are being transferred
from the HPWREN Internet traffic tracking machine. PMA is managed
by Joerg Micheel of NLANR/MNA and the University of Waikato, NZ.
Matthew Luckie, also of NLANR/MNA and the University of Waikato,
wrote the software that is able to interleave packet traces from
multiple interfaces into a singular file. The daily files only
contain packet headers, with no user data, and the IP addresses are
anonymized for the public traces to protect privacy. More information,
as well as the actual trace data, is available via the NLANR/MNA
PMA server at
In addition, the HPWREN trace collecting machine also automatically analyzes the daily traces, and sends summaries via electronic mail to various interested parties. Additional statistics are available at http://stat.hpwren.ucsd.edu. These data sets will be critical to the Quality of Service (QoS) and Policy Based Routing objectives of the new HPWREN project that has been previously described in a news update.
-- Joerg Micheel, NLANR/MNA PMA manager, and Hans-Werner Braun
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