Stefano Vissicchio

Central Control Over Distributed Routing

By: 
Stefano Vissicchio, Olivier Tilmans, Laurent Vanbever, Jennifer Rexford
Appears in: 
CCR August 2015

Centralizing routing decisions offers tremendous flexibility, but sacrifices the robustness of distributed protocols. In this paper, we present Fibbing, an architecture that achieves both flexibility and robustness through central control over distributed routing. Fibbing introduces fake nodes and links into an underlying linkstate routing protocol, so that routers compute their own forwarding tables based on the augmented topology. Fibbing is expressive, and readily supports flexible load balancing, traffic engineering, and backup routes.

A Declarative and Expressive Approach to Control Forwarding Paths in Carrier-Grade Networks

By: 
Renaud Hartert, Stefano Vissicchio, Pierre Schaus, Olivier Bonaventure, Clarence Filsfils, Thomas Telkamp, Pierre Francois
Appears in: 
CCR August 2015

SDN simpli??~Aes network management by relying on declarativity (high-level interface) and expressiveness (network ??~Bexibility). We propose a solution to support those features while preserving high robustness and scalability as needed in carrier-grade networks. Our solution is based on (i) a two-layer architecture separating connectivity and optimization tasks; and (ii) a centralized optimizer called DEFO, which translates high-level goals expressed almost in natural language into compliant network con??~Agurations.

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