IEIE Transactions on Smart Processing and Computing

The Institute of Electronics and Information Engineers (대한전자공학회)
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Multi-match Packet Classification Scheme Combining TCAM with an Algorithmic Approach

  • Lim, Hysook (Department of Electronic and Electrical Engineering, Ewha Womans University) ;
  • Lee, Nara (LG electronics Incorporated) ;
  • Lee, Jungwon (Department of Electronic and Electrical Engineering, Ewha Womans University)
  • Received : 2016.11.30
  • Accepted : 2017.01.10
  • Published : 2017.02.28
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Abstract

Packet classification is one of the essential functionalities of Internet routers in providing quality of service. Since the arrival rate of input packets can be tens-of-millions per second, wire-speed packet classification has become one of the most challenging tasks. While traditional packet classification only reports a single matching result, new network applications require multiple matching results. Ternary content-addressable memory (TCAM) has been adopted to solve the multi-match classification problem due to its ability to perform fast parallel matching. However, TCAM has a fundamental issue: high power dissipation. Since TCAM is designed for a single match, the applicability of TCAM to multi-match classification is limited. In this paper, we propose a cost- and energy-efficient multi-match classification architecture that combines TCAM with a tuple space search algorithm. The proposed solution uses two small TCAM modules and requires a single-cycle TCAM lookup, two SRAM accesses, and several Bloom filter query cycles for multi-match classifications.

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References

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