Análisis de calidad de servicio en transferencia de voz y video en una red de tecnología MPLS (Multi-Protocol Label Switching).

Abstract

An MPLS Multiprotocol Label Switching Network was designed and implemented to analyze the service quality when transferring audio and video, this was carried out with the use of CISCO equipment at the laboratories of CISCO academy. At the beginning an MPLS study was carried about its setting and working when sending packets of data as well as the advantages offered in relation to an ip network, then the network was designed and the setting commands were tested using a GNS3 network emulator, in this way the connectivity and convergence tests would be done for each protocol and system configured to avoid communication mistakes when they are configured with CISCO physical equipment. The network used the ospf protocol to establish the communication among the routers, this was necessary for MPLS to converge. MPLS was configured in each interface of the network to assure the LDP packaging on its borders and BGP protocol was used to create the PE routers from one border (server) to the other (customer). BGP allowed using MP-BGP the same protocol family to establish the vrf in order to separate the traffic and balance the packets of data. Then the users were created and configured to make audio and video calls with ELASTIX server connected to the network through its vrf for both server and customer. An external traffic was injected to carry out a real traffic, not an ideal one. The data were analyzed and the jitter result was: 27.70 ms, latency max 608.73 ms, packets lose 0%, this compared with the minimal values which determine an acceptable quality. With CISCO equipment, it was possible to implement the MPLS network to analyze the service quality. Before implementing the network, it is necessary to carry out tests with the use of the emulator in order to avoid damage in the equipment.