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Implement high port density 10GbE networks

Posted: 27 Jan 2009     Print Version  Bookmark and Share

Keywords:network topologies  high-port-count switches  Clos network 

With significant growth in data-centre traffic taking place year over year due to video streaming, electronic commerce, social networking and other advanced applications, the new generation of switches require higher and higher port densities. Even the most highly integrated switch ICs, however, can't provide enough ports on a single chip. The solution for most applications is to take advantage of different network topologies that allow developers to implement switches with densities of 32 ports, 48 ports, or even more, to create efficient, scalable interconnects between servers and compute clusters.

Extensive academic research indicates that several architectures are viable for implementing high-port-count switches using 10GbE technology. These include a Clos network and a fat-tree network—also known as a constant-bisectional-bandwidth network. Both networks have multiple stages—an ingress stage, one or more middle stages, and an egress or output stage.

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