We explain how the TOTEM toolbox can be used to engineer an operational network. TOTEM is an open source TOolbox for Traffic Engineering Methods which covers IP- based and MPLS-based intradomain traffic engineering (TE) algorithms, but also interdomain TE. In this paper, we use the toolbox as an off-line simulator to optimise the traffic of an operational network. To help an operator choose between an IP-based or MPLS-based solution, or find the best way to load- balance a network for a given traffic, our case study compares several IP and MPLS routing algorithms, evaluates the impact of hot-potato routing on the intradomain traffic matrix, and analyses the worst-case link failure. This study reveals the power of a toolbox that federates many traffic engineering algorithms.

This paper presents a new publicly available dataset from GÉANT, the European Research and Educational Network. This dataset consists of traffic matrices built using full IGP routing information, sampled Netflow data and BGP routing information of the GÉANT network, one per 15 minutes interval for several months. Potential benefits of publicly available traffic matrices comprise improving our understanding of real traffic matrices, their dynamics, and to make possible the benchmarking of intradomain traffic engineering methods

In this document, we propose a demon- stration of TOTEM, a TOolbox for Trac Engineering Methods. This toolbox integrates a series of tools for intra-domain and inter-domain trac engineering of IP and MPLS networks. It provides an open source software that allows an operator to test methods com- ing from the academic research. A researcher can also use the toolbox to compare and promote new TE algorithms. The toolbox is designed to be deployed either as an on-line tool in an operational network, or as an o-line trac engineering simulator. I. Introduction Today, a simple and classical way to provide Quality of Service (QoS) in a network is to overprovision it. To deal with increasing bandwidth requests and to meet some spe- cific QoS or Service Level Agreement (SLA), this approach is less and less tenable economically. One alternative way is to deploy trac engineering techniques. This is not so simple. Indeed, most of the problems encountered in this field are huge in size and combinatorial, which implies to find ecient heuristics. Research in the trac

We compare and evaluate different methods to infer groups of correlated failures. These methods try to group failure events occurring nearly simultaneously in clusters. Indeed if several failures occur nearly at the same moment in a network, it is possible that these failures have the same root cause. The input data of our algorithms are IP failure notifications that can be provided by several sources. We consider two sources: IS-IS Link State Packets (LSPs) and Syslog messages. Our first results on the Abilene and GÉANT networks show that the inference methods behave differently and that using IS-IS LSPs provides more accurate results than using Syslog messages.

RÉSUMÉ. Cet article présente l’architecture logicielle d’une boîte à outils d’ingénierie de trafic .Les méthodes déjà présentes couvrent l’ingénierie de trafic intra-domaine basée sur MPLS, mais devraient bientôt couvrir l’ingénierie de trafic inter-domaine, ainsi que celle basée sur IP. L’objectif de cette boîte à outils est de fournir un logiciel libre permettant à un opérateur de tester des outils issus de la recherche académique et à un chercheur de comparer et promouvoir ses algorithmes d’ingénierie de trafic. La boîte à outils est conçue pour être déployée comme un outil on-line dans un environnement opérationnel, ou comme un outil d’optimisation offline ou encore comme un simulateur d’ingénierie de trafic. Nous avons réalisé une étude de cas d’optimisation de trafic sur le réseau GÉANT. Cette étude présente une comparaison de différentes méthodes de routage, une évaluation du coût d’une protection de bout en bout ou locale ainsi que l’analyse de la pire panne de lien.

In this document, we propose a demonstration of TOTEM, a TOolbox for Traffic Engineering Methods. This toolbox integrates a series of tools for intra-domain and inter-domain traffic engineering of IP and MPLS networks. It provides an open source software that allows an operator to test methods coming from the academic research. A researcher can also use the toolbox to compare and promote new TE algorithms. The toolbox is designed to be deployed either as an on-line tool in an operational network, or as an off-line traffic engineering simulator.