An Empirical Study of Today's Internet Traffic for Differentiated Services IP QoS

The IETF is currently focused on Differentiated Services (Diffserv) as the architecture to provide Quality of Service in IP networks (IP-QoS). The Diffserv architecture consists of two key components: traffic conditioning at the edge and Per Hop Behaviour (PHB) at the core. Traffic Conditioners are realized through various building blocks such as classifier, meter, marker, policer etc. This paper focuses on an empirical study of pre-Diffserv Internet traffic. We use the results of the study to understand design choices for some of the Diffserv architecture building blocks. The primary contribution is an investigation into the usage of the Type-of-Service (TOS) field [1] marking to understand if its usage justifies the IETF Diffserv WG’s standardization of Class Selector PHB on the basis of backwards compatibility with the TOS octet. A second contribution is a detailed examination of Internet and Intranet traffic traces to understand issues related to packet classification in Diffser...

• Type: Conference
• Year: 2000
• Where: ISCC
• Authors: Fulu Li, Nabil Seddigh, Biswajit Nandy, Diego Matute
• Keywords: Communications, DiffServ Architecture, Diffserv Architecture Building, IETF Diffserv WG, ISCC 2000