ANALISIS COMPARATIVO PARA LA SELECCIÓN DEL PROTOCOLO MPLS Y SPB PARA IMPLEMENTAR UNA RED BACKBONE DE UN ISP

En la actualidad los proveedores de servicio de internet son los responsables del transporte de todo el flujo de datos en cada país, para ellos es importante se garantice el buen funcionamiento y garantizar la disponibilidad de la red. Los protocolos de transporte garantizaran el buen funcionamiento del backbone del operador no se sature y esto ocurre debido a la cantidad de paquetes que circulan por la red pueden consumir recursos de procesador y memoria de los Router. Actualmente el protocolo MPLS (Multiprotocol Label Switching) opera en la capa de enlace y red del modelo OSI definido en la RFC 3031 es el más utilizado. SPB (Shortest Path Bridging) es un estándar especificado en la norma IEEE 802.1aq. Es una tecnología de red destinada a simplificar la creación y configuración de redes de ordenadores al tiempo que permite el enrutamiento de trayectos múltiples. Utiliza el sistema Intermediate System to Intermediate System (IS-IS), un protocolo de estado de enlace con grado de portador probado, para construir dinámicamente la topología entre nodos de red, ahorrando tiempo y esfuerzo a los administradores de red y eliminando virtualmente el error humano. En este trabajo se analizará, compara y determinará el protocolo apropiado en la implementación de la red backbone del operador IP para sustituir el actual protocolo.Tesi

Enabling architectures for QoS provisioning

Nowadays, new multimedia services have been deployed with stringent requirements for Quality of Service (QoS). The QoS provisioning is faced with the heterogeneity of system components. This thesis presents two research: on architectures for QoS management at the application layer, fulfilled mainly by software components; and on distributed software architectures for routing devices providing desired QoS at the underlying communication layer. At the application layer, the QoS architecture we propose, based on the Quality Driven Delivery (QDD) framework, deals with the increasing amount of QoS information of a distributed system. Based on various QoS information models we define for key actors of a distributed system, a QoS information base is generated using QoS information collecting and analysis tools. To translate QoS information among different components, we propose mechanisms to build QoS mapping rules from statistical data. Experiments demonstrate that efficient QoS decisions can be made effectively regarding the contribution of all system components with the help of the QoS information management system. At the underlying layer, we investigate distributed and scalable software architectures for QoS-enabled devices. Due to the huge volume of traffic to be switched, the traditional software model used for current generation routers, where the control card of the router performs all the processing tasks, is no longer appropriate in the near future. We propose a new scalable and distributed architecture to fully exploit the hardware platforms of the next generation routers, and to improve the quality of routers, particularly with respect to scalability and to a lesser extent to resiliency and availability. Our proposal is a distributed software framework where control tasks are shared among the control and line cards of the router. Specific architectures for routing, signaling protocols and routing table management are developed. We investigate the challenges for such distributed architectures and proposed various solutions to overcome them. Based on a general distributed software framework, an efficient scalable distributed architecture for MPLS/LDP and different scalable distributed schemes for the routing table manager (RTM) are developed. We also evaluate the performance of proposed distributed schemes and discuss where to deploy these architectures depending on the type of routers (i.e., their hardware capacity