A fast IPv6 packet classification algorithm based on efficient multi-bit selection

Authors:
Xiangyang Gong;Wendong Wang;Shiduan Cheng
Affiliations:
State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, PR China;State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, PR China;State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, PR China
Venue:
Computer Communications
Year:
2010

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Abstract

Decision tree based schemes are widely used in designing high-speed packet classification algorithms. The primary objective is to construct a decision tree with minimal storage and searching time complexity. In this paper, we proposed a novel decision tree packet classification algorithm based on Efficient Multiple Bit Selection (EMBS). In the proposed algorithm, prefix fields are transformed to a set of independent bits; and multiple arbitrary bits are selected to cut nodes when building the decision tree. A Performance Estimate Function (PEF) and an efficient bit selecting algorithm are exploited to determine which bits should be selected to obtain an efficient decision tree with high performance. The proposed EMBS algorithm is capable of handling range match fields, and it is suitable for IPv6 packet classification as well as IPv4. Evaluation results show that EMBS provides a great improvement over recent decision tree based algorithms in both space requirement and searching performance.