Analysing campus traffic using the meter-MIB

Remco Poortinga, Remco van de Meent, Aiko Pras

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    Abstract

    The University of Twente, which is the only campus university in the Netherlands, connects all students living on the campus via 100 Mbit/s switched Ethernet links to the campus network. This student network not only interconnects all students among themselves, but also provides, via a 300 Mbit/s link, access to other parts of the university network as well as the external Internet. Since the 300 Mbit/s link is a potential bottleneck, the university has defined a policy to limit the total amount of traffic a single student is allowed to exchange to 50 Gigabyte per week. To check if students do not exceed this limit, a number of interface MIB variables within the student’s access switches are monitored on a periodic base. Although monitoring these MIB variables is good enough to detect which students exchange more than 50 Gigabyte weekly, the approach fails to reliably determine which students are the top users of the potential bottleneck, which is the 300 Mbit/s link. The question
    has therefore been raised whether it would be feasible to directly measure all traffic on that link to precisely determine which student is using which portion of the link’s capacity and for what purpose (downloading information from the teaching departments, browsing the Internet etc.). Although NeTraMet, which is an implementation of the IETF’s meter MIB, would in theory be useable for such measurements, it was not clear whether it would be fast enough to analyse each packet on a 300 Mbit/s full-duplex link. This paper therefore discusses the
    experiments that have been performed to find the limits of Netramet, and investigate whether the tool would be useful to solve real management problems. In our experiments Netramet was running on a standard PC.
    Original languageEnglish
    Title of host publicationProceedings of the Passive and Active Measurement Workshop (PAM2002)
    EditorsP. Clemens, R. Whitner
    Place of PublicationFort Collins, CO, USA
    PublisherAgilent Technologies
    Pages192-201
    Number of pages10
    Publication statusPublished - 25 Mar 2002
    EventWorkshop on Passive and Active Measurement, PAM 2002 - Fort Collins, United States
    Duration: 25 Mar 200227 Mar 2002

    Workshop

    WorkshopWorkshop on Passive and Active Measurement, PAM 2002
    Abbreviated titlePAM
    CountryUnited States
    CityFort Collins
    Period25/03/0227/03/02

    Keywords

    • Flow metering
    • Network measurements
    • NeTraMet
    • IF-MIB

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