Multi-protocol query structure for SDN switch based on parallel bloom filter

Parallel Bloom filter is a multi-field query structure which possess high query efficiency and less resource consumption. In this paper, we propose masked parallel Bloom filter with twice verification Hash table (MPBF-TVHT) to achieve full flexibility of multi-protocol query and lower false positive possibility (FPP) for SDN switch. We depict item store and query process of multi-protocol lookup table in all field combinations, analysis influence that different combinations have on FPP and provide effective solutions. Simulation and practical test prove the proposed structure to support adequate table entries while keeping a low FPP for SDN switch.