Performance Evaluation of Shortest Path Computation for IP and MPLS Multi-service Networks over Open Source Implementation H. Abdalla Jr 1 , A.M. Soares 1 , P.H.P. de Carvalho 1 , G. Amvame-Nze 2 , P. Sols Barreto 2 , R. Lambert 2 , E. Pastor 2 , I. Amaral 2 , V. Macedo 2 , P. Tarchetti 2 1,2 Labcom-Department of Electric Engineering, Faculty of Technology, University of Brasilia Campus UniversitÆrio Darcy Ribeiro - Asa Norte CEP 70910-900 - Braslia - DF  Brasil 1 {abdalla,martins,paulo}@ene.unb.br 2 {georges,pris,roquelam,eduardo,italo,vinicius,paulor}@labcom.unb.br Abstract. In this work is shown a performance evaluation of two open source platforms in the case of a link failure event, both of them based on the Shortest Path Computation routing paradigm. We present the results of measures using five different traffic flows in a multi-service network. The measures consider recovery time, latency and packet losses. We also illustrate the development of a simple routine for the establishment of new LSP (Label Switched Path) based in one of the open source platforms. Considering the results of our evaluation, some ideas and work in the area that may improve the results are suggested. 1. Introduction Nowadays exists a well accepted tendency for the future of the telecommunications. The guidelines indicate the integration of voice and data services in a multi-service network. The standards for this new environment are not totally dictated yet and many subjects are still open to discussion. We can mention among these subjects: the convergence process, the performance issues involved, as well as the new services, costs and benefits of such evolution[1]. The establishment of platforms that can manage the data (packet switched legacy) and voice (circuit switched legacy) worlds are necessary for the development of new services in this convergence process. But not only the development of new services is an important issue. The fault recovery, the protocols integration, the migration process and the performance issues are some of the fields of study for this new environment. The final goal of this work is to provide a new network, based on the IP (Internet Protocol), with levels of services of higher quality in comparison with the available today, integrating a huge variety of equipments, from optical multiplexers to gateways controllers, from MPLS (Multi- protocol label Switching) routers to local exchanges. One of the most important utilities of the MPLS is the capacity to introduce the process of TE (Traffic Engineering). This feature implements the capacity to optimize routing flows for the use of resources to provide high quality services considering other important variables, such as costs and charging. The research also extends to the P. Dini et al. (Eds.): SAPIR 2004, LNCS 3126, pp. 267-278, 2004.  Springer-Verlag Berlin Heidelberg 2004