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http://dx.doi.org/10.3745/KIPSTA.2004.11A.5.333

A Parallel IP Address Lookup Scheme for High-Speed Routers  

Park, Jae-hyung (전남대학교 전자컴퓨터정보통신공학부)
Chung, Min-Young (성균관대학교 정보통신공학부)
Kim, Jin-soo (건국대학교 컴퓨터ㆍ응용과학부)
Won, Yong-gwan (전남대학교 정보통신공학부/의학부)
Publication Information
The KIPS Transactions:PartA / v.11A, no.5, 2004 , pp. 333-340 More about this Journal
Abstract
In order that routers forward a packet to its destination, they perform IP address lookup which determines the next hop according to the packet's destination address. In designing high speed routers, IP address lookup is an important issue. In order to design high speed routers, this paper proposes a parallel IP lookup scheme which consists of several IP lookup engines without any modification of already fabricated indirect IP lookup chipsets. Also, we propose a simple rule for partitioning IP prefix entries In an overall forwarding table among several IP lookup engines. And we evaluate the performance of the proposed scheme in terms of the memory size required for storing lookup information and the number of memory accesses on constructing the forwarding table. With additional hardware logics, the proposed scheme can reduce about 30% of the required memory size and 80% of the memory access counts.
Keywords
Router; IP Address Lookup; Parallel Scheme; Indirect Lookup Scheme; Prefix Partition;
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