The key factor defining the efficiency of IP routers is the speed of the forwarding operation, that is the speed of determining the next-hop destination for each packet. The operation is notsimple because the IP addresses are unstructured and the destination subnetworks can be overlapping. This requires so called longest match lookup operation. In this paper I propose a simple and very fast address lookup algorithm that can be easily implemented in hardware. It is designed for inexpensive systems and thus requires only standard SRAM and FPGA devices. However, its performance exceeds even the requirements of today's backbone routers and it allows for incremental forwarding table updates.
|Title of host publication||Proceedings of the 6th WSEAS International Multiconference on Circuits, Systems,Communications and Computers, CSCC 2002|
|Publisher||World Scientific and Engineering Academy and Society, WSEAS|
|Pages||3371 - 3379|
|Publication status||Published - 2002|
|MoE publication type||Not Eligible|
|Event||6th WSEAS World multiconference on circuits, systems, communications and computers - Rethymno, Greece|
Duration: 7 Jul 2002 → 14 Jul 2002
|Conference||6th WSEAS World multiconference on circuits, systems, communications and computers|
|Period||7/07/02 → 14/07/02|
Seppänen, K. (2002). Novel IP address lookup algorithm for inexpensive hardware implementation. In Proceedings of the 6th WSEAS International Multiconference on Circuits, Systems,Communications and Computers, CSCC 2002 (pp. 3371 - 3379). World Scientific and Engineering Academy and Society, WSEAS.