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http://dx.doi.org/10.5392/JKCA.2013.13.02.044

Efficient Parallel IP Address Lookup Architecture with Smart Distributor  

Kim, Junghwan (건국대학교 컴퓨터공학과)
Kim, Jinsoo (건국대학교 컴퓨터공학과)
Publication Information
The Journal of the Korea Contents Association / v.13, no.2, 2013 , pp. 44-51 More about this Journal
Abstract
Routers should perform fast IP address lookup for Internet to provide high-speed service. In this paper, we present a hybrid parallel IP address lookup structure composed of four-stage pipeline. It achieves parallelism at low cost by using multiple SRAMs in stage 2 and partitioned TCAMs in stage 3, and improves the performance through pipelining. The smart distributor in stage 1 does not transfer any IP address identical to previous one toward the next stage, but only uses the result of the previous lookup. So it improves throughput of lookup by caching effects, and decreases the access conflict to TCAM bank in stage 3 as well. In the last stage, the reorder buffer rearranges the completed IP addresses according to the input order. We evaluate the performance of our parallel pipelined IP lookup structure comparing with previous hybrid structure, using the real routing table and traffic distributions generated by Zipf's law.
Keywords
High-performance Router; Parallel IP Address Lookup; Performance Improvement; Smart Distributor;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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