An evaluation of QoS provisioning for UBR applications in a DiffServ Network

Jesse Kielthy, Chamil Kulatunga, Richard Frisby, Mícheál Ó Foghlú

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


    In this paper an understanding of the configuration and performance of a Differentiated Services (DS) network is presented. Strong emphasis is placed on the configuration of the quality of service (QoS) dynamics of expedited forwarding (EF) and assured forwarding (AF) per-hop behaviour (PHB) class types that are required to allow an Unspecified Bit Rate (UBR) application to function effectively - in particular, the configuration of the AF features that mark non-conformant packets with a lower drop priority DS Code Point (DSCP). The usability of these mechanisms is then evaluated in a real, testing environment. DS edge and core routers are configured in a testbed that has been created to emulate a multiple-domain network. Data was then collated from a diverse range of testing procedures and then analysed to allow the authors to draw their conclusions that increased their understanding how a DS network operates.
    Original languageEnglish
    Title of host publicationProceedings of IT&T 2003
    Publication statusPublished - 2003


    • DiffServ


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