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Recent FPGA-based implementations of network virtualization represent a significant step forward in network performance and scalability. Although these systems have been shown to provide orders of magnitude higher performance than solutions using software-based routers, straightforward reconfiguration of hardware-based virtual networks over time is a challenge. In this paper, the authors present the implementation of a reconfigurable network virtualization substrate that combines several partially-reconfigurable hardware virtual routers with software virtual routers. The update of hardware-based virtual networks in the system is supported via real-time partial FPGA reconfiguration. Hardware virtual networks can be dynamically reconfigured in a fraction of a second without affecting other virtual networks operating in the same FPGA.
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