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One of the most commonly used metrics to describe the utilization of an Internet link is the average bandwidth. While it is easily calculated by any network device and very comprehensible, it also has some severe shortcomings. The sampling interval has a strong influence on its value. This interval is often on the order of minutes, and consequently, completely hides instantaneous traffic characteristics, such as burstiness, within a single number. We propose a new metric that maintains much more of the underlying traffic characteristics, but is still comprehensible and useful as a network administration tool. It is based on real-time analysis of passive measurements. We focus on the distribution of idle intervals between packets to provide a measure for both short-term utilization and long term trends of traffic on an Internet link.



This presentation is part of session "Recent Results III" which starts at Tuesday, June 8 @ 14:00


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Last modified on the 15th 2004f June 2004 - 12:35