A High-Speed Packet Classification Using TCAM

Masanori UGA  Masaaki OMOTANI  Kohei SHIOMOTO  

IEICE TRANSACTIONS on Communications   Vol.E85-B   No.9   pp.1766-1773
Publication Date: 2002/09/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Internet
packet classification,  TCAM,  IPv6,  router,  

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This paper proposes a novel packet classification method using ternary content-addressable memory (TCAM), which can store very wide policy rules despite the limited width of TCAM. For IP version 6, policy rules could be 304 bits wide. This method enables us to use commercially available TCAM for packet classification and thus builds an ultra high-speed policy based packet forwarding engine for differentiated services on the Internet.