Survey on Distributed Control in a Router

The rapid development of optical transmission and fast growth of Internet traffics require higher-performance routers.The overload of control plane often causes the oscillation of network.In a serious case,it results in router crashing.To overcome the problems of the monolithic control plane,some schemes of distributed control in a router have been proposed.In this paper,we thoroughly analyzed the problems of centralized control plane.Based on the critical obstacles in realizing router's distributed control,we made summary and comparison of existing schemes from three aspects:distributed control plane,internal communication of distributed control plane and distributed implementation of routing protocol and algorithm.Finally,the future trend is discussed.