A Hierarchical Backbone Network Based on VLB Architecture

The increasing growth of the global Internet making the shortcomings of its unstructured topology and distributed routing algorithm are exposed more rapidly. To design a controllable, scalable and manageable backbone network with a simple, efficient architecture is very imperative. Among many topologies, Tree topology which has a natural hierarchical structure and explicit end-to-end transmission path provides a promising solution for the future Internet architecture. To overcome the defects of tree topology in reliability and scalability, we propose a hierarchical network based on Viliant load-balancing (VLB) architecture which takes advantage of the both. The analysis of its fault-tolerance property and the corresponding flow-level load-balancing scheme are also presented in the paper.