Networking

Internet-Router Buffered Crossbars Based on Networks on Chip

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Executive Summary

The scalability and performance of the Internet depends critically on the performance of its packet switches. Current packet switches are based on single-hop crossbar fabrics, with line cards that use virtual output-queueing to reduce head-of-line blocking. In this paper, the authors propose to use a multi-hop Network On a Chip (NOC) as the crossbar fabric, with FIFO-queued line cards. Current high-performance Internet packet switches are based on crossbar fabrics and come in two flavours: unbuffered and internally buffered.

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