Parallel Packet Switch without Segmentation-and-Reassembly

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Executive Summary

The ever increasing demand for more bandwidth at core routers has been a challenge for switch design. To address the challenge, Parallel Packet Switches (PPSs) combine multiple parallel switching fabrics and provide huge aggregate bandwidth. However, most existing PPSs handle only fixed length packets, also called cells, mainly because traditional switching fabrics can process only cells. Since packets in the Internet are of variable length, existing PPSs need Segmentation-And-Reassembly (SAR) to process such packets, which will introduce padding bits and waste precious bandwidth. In this paper, the authors propose a PPS to directly handle variable-length packets without SAR. They present a simplified 1 ? 1 variable-length PPS.

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