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A novel architecture was proposed in to address scalability issues in large, high speed packet switches. The architecture proposed in, namely OBIG (Output Buffers with Input Groups), distributes the switch fabric across multiple chips, which communicate via high speed interconnects enabled by Proximity Communication (PC), a recently developed circuit technology. An OBIG switch aggregates multiple input flows inside the switch fabric, thereby significantly reducing the amount of memory required for internal buffers, vis-a-vis a conventional buffered crossbar, which has buffers at every cross-point. Thus, the OBIG architecture is promising for realizing terabit switches with hundreds of ports.
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