The New Jersey Institute of Technology's
Electronic Theses & Dissertations Project

Title:	An algorithm for fast route lookup and update
Author:	Yilmaz, Pinar Altin
View Online:	njit-etd2000-049 (x, 100 pages ~ 3.8 MB pdf)
Department:	Department of Electrical and Computer Engineering
Degree:	Master of Science
Program:	Computer Engineering
Document Type:	Thesis
Advisory Committee:	Uzun, Necdet (Committee chair) Tekinay, Sirin (Committee member) Ansari, Nirwan (Committee member) Toy, Mehmet (Committee member)
Date:	2000-05
Keywords:	IP address lookup High performance routers
Availability:	Unrestricted
Abstract:	Increase in routing table sizes, number of updates, traffic, speed of links and migration to IPv6 have made IP address lookup, based on longest prefix matching, a major bottleneck for high performance routers. Several schemes are evaluated and compared based on complexity analysis and simulation results. A trie based scheme, called Linked List Cascade Addressable Trie (LLCAT) is presented. The strength of LLCAT comes from the fact that it is easy to be implemented in hardware, and also routing table update operations are performed incrementally requiring very few memory operations guaranteed for worst case to satisfy requirements of dynamic routing tables in high speed routers. Application of compression schemes to this algorithm is also considered to improve memory consumption and search time. The algorithm is implemented in C language and simulation results with real-life data is presented along with detailed description of the algorithm.