The New Label Design for Hierarchical MPLS Network Based on Uni-Interface

This paper introduces the concept of hierarchical MPLS network. According to the existing network structure model, the paper gives concept of hierarchical MPLS network based on uni-interface. The paper simulates the routing and data switching of such network based on an instance and discusses three label switching technologies. The paper firstly discusses the uni-label technology based on hierarchical routing. Label stack technology is a tunnel technology to solve MPLS-acrossed problem, and the paper only proposes double layer label. The last way to solve hierarchical MPLS network is double label which is not stacked. Such technology is originated from the former two technologies. After discussing the three technologies, the paper gives comparison and analysis which cover the conclusion.