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Issue No. 05 - September/October (2004 vol. 8)
ISSN: 1089-7801
pp: 50-56
Paul Barford , University of Wisconsin at Madison
Joel Sommers , University of Wisconsin at Madison
Empirical analysis of Internet traffic characteristics should not be biased by the measurement methodology used to gather data. This article compares probe- (active) and router-based (passive) methods for measuring packet loss both in the laboratory and in a wide-area network. The laboratory case study demonstrates the accuracy of passive Simple Network Measurement Protocol (SNMP) measurements at low loss rates; the wide-area experiments show that active-probe loss-rate measurements don't correlate with those measured by SNMP from routers in a live network. This case study's findings also reveal that common methods for active probing for packet loss suffer from high variance and from the effects of end-host interface loss.
Internet, packet loss, probe, router

J. Sommers and P. Barford, "Comparing Probe- and Router-Based Packet-Loss Measurement," in IEEE Internet Computing, vol. 8, no. , pp. 50-56, 2004.
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