TAN Ming-feng, GONG Zheng-hu. High Speed IP Lookup Algorithm with Scalability and Parallelism Based on ASIC Implementation[J]. Acta Electronica Sinica, 2005, 33(2): 209-213.
TAN Ming-feng, GONG Zheng-hu. High Speed IP Lookup Algorithm with Scalability and Parallelism Based on ASIC Implementation[J]. Acta Electronica Sinica, 2005, 33(2): 209-213.DOI:
This paper proposes a high performance IP routing lookup algorithm based on ASIC implementation. It keeps prefixes of different length in different group associated CAMs
and uses different Hash functions to map the prefixes into the corresponding groups of the CAMs. By this means it reduces the Hash collisions and the memory usage. This scheme can finish the lookup within 1 memory access time and need only few memory accesses for each update in average. With 10ns memory
this scheme can fully match the link speed of OC-768. For its good scalability and parallelism
it can be extended to adapt larger forwarding tables and faster forwarding requirements.