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CONFIG_IP_FIB_TRIE: FIB_TRIE

General informations

The Linux kernel configuration item CONFIG_IP_FIB_TRIE:

Help text

Use new experimental LC-trie as FIB lookup algorithm. This improves lookup performance if you have a large number of routes.

LC-trie is a longest matching prefix lookup algorithm which performs better than FIB_HASH for large routing tables. But, it consumes more memory and is more complex.

LC-trie is described in:

IP-address lookup using LC-tries. Stefan Nilsson and Gunnar Karlsson IEEE Journal on Selected Areas in Communications, 17(6):1083-1092, June 1999

An experimental study of compression methods for dynamic tries Stefan Nilsson and Matti Tikkanen. Algorithmica, 33(1):19-33, 2002. http://www.csc.kth.se/~snilsson/software/dyntrie2/

Hardware

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