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Critical networked services enable significant revenue for network operatorsand, in turn, are regulated by Service Level Agreements (SLAs). In order toensure SLAs are being met, service levels need to be monitored. One techniquefor this involves active measurement mechanisms which employ measurement probesalong the network to inject synthetic traffic and compute the networkperformance. However, these mechanisms are expensive in terms of resourcesconsumption. Thus, these mechanisms usually can cover only a fraction of whatcould be measured, which can lead to SLA violations being missed. Besides that,the definition of this fraction is a practice done by human administrators,which does not scale well and does not adapt to highly dynamic networkingpatterns. In this article, we examine the potential benefits of using P2Ptechnology to improve the detection of SLA Violations. We first describe theprinciples of a P2P-based steering of active measurement mechanisms. Theseprinciples are characterized by a high degree of decentralized decision makingacross a network using a self-organizing overlay. In a second step, we presentmeasurement session activation strategies based on these principles. Thesestrategies do not require human intervention, are adaptive to changes innetwork conditions, and independent of the underlying active measurementtechnology.

On Using P2P Technology for Decentralized Detection of Service Level Agreement Violations