A high-performance IPV6 lookup engine on FPGA
Thilan Ganegedara, Viktor K. Prasanna · 2013
We present a routing table partitioning based solution for a high-performance IPv6 packet lookup engine on Field Programmable Gate Arrays (FPGAs). Based on the statistics collected from real-life backbone IPv6 routing tables, we propose a partitioning algorithm that creates both disjoint and balanced prefix groups. For each partition a range tree is built to perform IPv6 lookup. These range trees are mapped onto independent pipelines on FPGA such that for a single IPv6 lookup, only one partition is active. This yields high dynamic power efficiency via selective stage memory enabling. The balanced partitioning enables us to exploit the memory layout of the FPGA to align the pipeline with the on-chip memory blocks for enhanced performance and resource usage. Post place-and-route results on a state-of-the-art FPGA platform shows that a throughput of 200+ Gbps can be achieved for a 1 million entry IPv6 routing table.