Practical delay monitoring for ISPs
CoNEXT(2005)
摘要
Point-to-point delay is an important network performance measure as well as a key parameter in SLAs. We study how to measure and report delay in a concise and meaningful way for an ISP, and how to monitor it efficiently. We analyze various measurement intervals and potential metric definitions. We find that reporting high quantiles (between 0.95 and 0.99)every 10-30 minutes as the most effective way to summarize the delay in an ISP. We then propose an active probing scheme to estimate a high quantile with bounded error. We show that only a small number of probes are sufficient to provide an accurate estimate. We validate the proposed delay monitoring technique on real data collected on the Sprint IP backbone network.
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关键词
accurate estimate,report delay,practical delay monitoring,important network performance measure,sprint ip backbone network,key parameter,high quantile,high quantiles,bounded error,proposed delay monitoring technique,point-to-point delay,data collection,point to point,network performance
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