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An Asynchronous Routing Algorithm for Clos Networks

Wei Song and Doug Edwards


Clos networks provide the theoretically optimal solution to build high-radix switches. This paper proposes the first-ever asynchronous routing algorithm for general three-stage Clos networks. It outperforms the synchronous concurrent round-robin dispatching algorithm in behavior level simulations. In a 32-port Clos network utilizing this algorithm, paths are reserved in 6.2 ns and released 3.9 ns.

PDF (627K) IEEE Copyright