Performance Analysis and Comparison of Lookup Architecture in Cluster-Based Scalable Router

With the rapid increasing of network traffic, whether the router can be scalable is becoming the issue that people concern. The cluster-based scalable router can increase the capability infinitely in theory with linearly cost. Without the concentrated switch fabric, the operations of routing and forwarding are different from the typical crossbar router. The incoming packets usually pass through different node. In this paper, we propose three primary routing/forwarding architectures and compare the performance based on the 3D-torus topology, which is mostly adopted in cluster-based scalable router, mainly the requirement for the lookup speed and the variety of the latency due to the increasing of node. Base on the result, we draw a conclusion that clusterbased scalable router is fit to core router and present the theoretical reference for the subsequent realization of scalable router searching /forwarding architecture.