Cost-Effective Switching Fabrics with Distributed Control for Scalable Routers

This paper deals with scalable switching fabrics for high-performance routers with large numbers of ports for connecting external links operating at various speeds to arrive at aggregate rates up to multi-terabits per second. The proposed switching fabrics employ no centralized scheduling and consist of small routing units (RU’s), which are interconnected by multistage-based connecting components (CC’s) in accordance with grid structures, with routing decisions made by RU’s and CC’s individually in a simple, distributed manner. They are referred to as gridoriented, multistage-connected RU’s, dubbed GMR. With distributed routing, GMR enjoys good scalability and low hardware complexity. It is found, based on our extensive simulation, that GMR outperforms not only their crossbar counterparts for small sizes, but also their compatible designs aiming at large sized construction (built from multiple stages of small crossbars), despite its lower hardware complexity. Two types of chips are sufficient to permit any sized construction; one for RU’s and another for CC’s. The proposed switching fabrics are cost-effective, readily suitable for scalable routers. I

Vérification fonctionnelle et validation de performance architecturale pour des tissus d'interconnexion

Vérification -- Validation de performance -- Tissu d'interconnexion -- Statistiques pertinentes aux tissus d'interconnexion -- XTSC de Tensilica -- Environnement de validation/vérification à haut niveau -- Concepts et description de l'environnement de validation -- Concepts et description de l'environnement de vérification -- Dualité de l'environnement de vérification et validation de performance et simulation -- Collecte de données et calculs de statistiques -- Intégration de modèles de trafic complémentaires -- Intégration d'une application complète matériel-logiciel -- Intégration d'un modèle de trafic synthétique à l'environnement -- Résultats -- Méthode de conception qui englobe la validation -- Résultats obtenus avec l'environnement à haut niveau