A longest prefix match search engine for multi-gigabit IP processing

被引:0
|
作者
Kobayashi, M [1 ]
Murase, T [1 ]
Kuriyama, A [1 ]
机构
[1] NEC Corp Ltd, C&C Media Res Labs, Kawasaki, Kanagawa, Japan
关键词
D O I
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中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
We propose an IP forwarding table search engine architecture, VLMP (Vertical Logical operation with Mask-encoded Prefix-length), for routers with multi-gigabit/sec speed links. We discuss the existing approaches and the requirements for search engines, and go on to propose VLMP search engine architecture that expands upon a Content Addressable Memory (CAM) and can perform wire-speed packet processing of an OC-192 (9.6 Gb/s) link. In this architecture, prefixes can be stored in arbitrary order, while existing ternary CAMs require prefixes to be stored in the order of their lengths. Also presented is a newly developed search LSI in which the architecture is implemented.
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页码:1360 / 1364
页数:5
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