1 DBS A Bit-level Heuristic Packet Classification Algorithm for High Speed Network Author: Baohua Yang, Xiang Wang, Yibo Xue and Jun Li Publisher: International Conference on Parallel and Distributed Systems (ICPDS) 2009 Presenter: Han-Chen Chen Date: 2011/02/23

2 Introduction  Discrete Bit Selection 1.Use bitlevel heuristics to split rules efficiently 2.Adopt adaptive flat data structures to guarantee fast searching with low memory requirement

3 DBS Algorithm (1/5) E-bit bitleftright

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5 DBS Algorithm (3/5) Mask Vector Generation Our motivation is to select the most effective mask vector which can split R into subsets as small as possible. 1.Sequential Forward Selection (SFS) 2.Heuristic Swap (HS)

6 DBS Algorithm (4/5)

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8 Performance Evaluation (1/8)

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