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Since its creation, the Internet changed a lot and it is now common to have many different paths between two ASes. Unfortunately, theses paths present much varying properties making some faster or cheaper than others. In this tutorial, we first quantify this diversity and show that the choice of a path can have an impact on the traffic performances. This observation motivate the need of a system that enables operators to control their traffic based on the network performance (e.g., delay). To this aim, we present the IDIPS (ISP-Driven Informed Path Selection) service. IDIPS is a service able to rank paths based on their expected performances. Unfortunately, IDIPS alone cannot enforce the use of the best paths. This is why we introduce the LISP protocol and show how to combine LISP and IDIPS to have a performance based traffic engineering system. Biography: Damien Saucez received his master degree in computer science engineering from the Université catholique de Louvain in 2007. Damien is currently Ph.D. candidate in the IP Networking Lab at the Université catholique de Louvain. His research interests are in traffic engineering, path selection algorithms, multihoming and large-scale Internet measurements. Since the late 2007, Damien is actively involved in the LISP working group at the IETF.
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