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Multi-core CPUs, along with recent advances in memory and buses, render commodity hardware a strong candidate for software router virtualization. In this context, the authors present the design of a new platform for virtual routers on modern PC hardware. They further discuss the design choices in order to achieve both high performance and flexibility for packet processing. Recent research has shown that modern PCs are a viable platform for the implementation of high-performance software routers. The functionality provided by software routers combined with recent virtualization technologies allows multiple instances of routers to run concurrently on a single box while offering highly configurable forwarding planes and custom routing protocols.
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