Evaluation of Speedup and Expansion in Terabit Switch Fabrics

Sarah Renée Ruepp, Andreas Rytlig, Michael Stübert Berger, Henrik Wessing, Anna Manolova Fagertun, Hao Yu, Anders Rasmussen

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    Abstract

    This paper evaluates speedup and expansion in a multi-stage Terabit switch fabric. Single-stage switch fabrics, e.g. crossbar switches, are difficult to scale up to a Terabit system. Hence, a multi-stage switch fabric, where traffic can be distributed on different chips, offers a promising perspective. We evaluate buffer usage, number of out-of-sequence cells and fabric delay. Simulation results obtained in OPNET Modeler show that speedup outperforms expansion and that both approaches significantly gain from applying an output line speedup. By reducing the buffer usage in the middle stage, fewer cells arrive out-of-sequence and hence the need for re-sequencing is decreased as well.
    Original languageEnglish
    Title of host publicationProceedings of OPNETWORK 2011
    Number of pages6
    PublisherOPNET
    Publication date2011
    Publication statusPublished - 2011
    EventOPNETWORK 2011 - Washington DC, United States
    Duration: 29 Aug 20111 Sept 2011
    http://www.opnet.com/opnetwork2011/

    Conference

    ConferenceOPNETWORK 2011
    Country/TerritoryUnited States
    CityWashington DC
    Period29/08/201101/09/2011
    Internet address

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    • OPNETWORK 2011

      Hao Yu (Participant)

      27 Aug 20112 Sept 2011

      Activity: Attending an eventParticipating in or organising workshops, courses, seminars etc.

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