Lightweight link dimensioning using sFlow sampling

R. de Oliveira Schmidt, R. Sadre, Anna Sperotto, Aiko Pras

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    Operators use link dimensioning to provision network links. In practice, traffic averages are obtained via SNMP are used to roughly estimate required capacity. More accurate solutions often require traffic statistics easily obtained from packet captures, e.g. variance. However, packet capturing may not be trivial in high-speed links. Aiming scalability, operators often deploy packet sampling on monitoring, but little is known how it affects link dimensioning. In this paper we assess the feasibility of lightweight link dimensioning using sFlow, which is a widely-deployed traffic monitoring tool. We implement sFlow sampling algorithm and use a previously proposed and validated dimensioning formula that needs traffic variance. We validate our approach using packet captures from real networks. Results show that the proposed procedure is successful for a range of sampling rates and that, due to randomness of sampling algorithm, the error introduced by scaling the traffic variance yields more conservative results that cope with short-term traffic fluctuations.
    Original languageUndefined
    Title of host publicationProceedings of the 9th International Conference on Network and Services Management (CNSM 2013)
    Place of PublicationUSA
    Number of pages4
    ISBN (Print)978-3-901882-53-1
    Publication statusPublished - 14 Oct 2013
    Event9th International Conference on Network and Services Management, CNSM 2013 - Zurich, Switzerland
    Duration: 14 Oct 201318 Oct 2013
    Conference number: 9

    Publication series

    PublisherIEEE Computer Society


    Conference9th International Conference on Network and Services Management, CNSM 2013
    Abbreviated titleCNSM


    • sFlow
    • EWI-23614
    • METIS-297795
    • Packet sampling
    • IR-87216
    • Link Dimensioning

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