Evaluación de una red MPLS usando Diffserv para mejorar el rendimiento en aplicaciones con QoS.

Abstract

The purpose of this research is to define and evaluate an MPLS (Multiprotocol Label Switching) network with differentiated service to improve quality parámeters and real-time application services such as: VOIP transmission (IP VOICE), video conferences, etc. This type of aplications require low delay, low packet loss in end-to-end transmission to guarantee Quality and Services (QoS, Quality of Service).This was achieved with the MPLS and Differentiated service architecture defined in RFC 2474 “Definition of the differentiated Services Field (Ds Field)” where basically what was done marking the traffic on the MPLS Label indicating the priority of the sent packet, so that in case of congestion the most importance packages are the first to be forwarded, 5 types of priority service were applied, they are: Premium, Gold, Silver, bronze and better effort, witch correspond to traffic ordered according to the priority of arrival at its destination. Through the traffic injector D-ITG to voice, streaming and data traffic was generated and the parameters of delay, jitter and packet loss of the traffic that runs the MPLS network with Diferentiated Service were evaluated. The results obtained are within the appropriate thresholds according to the standards of ITU-T G.1010, and ITU Y.1541 and IEEE 802 1.1, which are of great contribution to companies that need convergence, flexibility and efficiency in the transmission of information under the same platform. It is recommended to use MPLS with Diferentiated Service in network that requiere a bandwidth agreement and mínimum guarantee of packet loss to ensure the quality of service.