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Comparing Probe- and Router-Based Packet-Loss Measurement
September/October 2004 (vol. 8 no. 5)
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.
Index Terms:
Internet, packet loss, probe, router
Paul Barford, Joel Sommers, "Comparing Probe- and Router-Based Packet-Loss Measurement," IEEE Internet Computing, vol. 8, no. 5, pp. 50-56, Sept.-Oct. 2004, doi:10.1109/MIC.2004.34
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