Enterprise 2.0

Multi-Objective Monitoring for SLA Compliance

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Executive Summary

Service Level Agreements (SLAs) define performance guarantees made by service providers, e.g, in terms of packet loss, delay, delay variation, and network availability. In this paper, the authors describe a new active measurement methodology to accurately monitor whether measured network path characteristics are in compliance with performance targets specified in SLAs. Specifically, they introduce a new methodology for estimating packet loss rate that significantly improves accuracy over existing approaches; a new methodology for measuring mean delay along a path that improves accuracy over existing methodologies, and a method for obtaining confidence intervals on quantiles of the empirical delay distribution without making any assumption about the true distribution of delay.

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