Study On BGP-Based InterDomain Traffic Engineering

The Internet has evolved into a very critical communications infrastructure in the past dozens years, applying significant in economic, educational, and social activities. Simultaneously, the Internet communications services have becoming more competitive and end-users are demanding very high quality service from their service providers. Consequently, performance optimization of large scale IP networks, especially public Internet backbones, have become an important problem. Internet routing system today is composed of two parts: intradomain routing and interdomain routing. Inside an autonomous domain, network managers can get the router topology and control the route. Therefore, the control of the distribution of traffic inside a domain is possible. At the interdomain level on the other hand, the approach used in the Internet is the one of a distributed control of the routing information. Each autonomous system(AS) use border gateway protocol(BGP) to exchange routing information with other ASes. A key feature of BGP is that it allows each network manager to define its routing policies. An AS may advertise all its routes or a fraction of its routes to neighboring ASes. Interdomain traffic engineering is particularly difficult since the network manager does not have detailed information about interdomain traffic and the topology. Compared with intradomain traffic engineering, the technology of interdomain traffic engineering is not perfect and sufficient. Based on the NSF project "Study On InterDomain Routing Stability and Managebility", this dissertation discussed several problem of interdomain traffic engineering.This dissertation summarizes the present situation of the application of intradomain traffic engineering and interdomain traffic engineering, introduces the importance of interdomain traffic engineering and the shortage of current technologies, simply introduces BGP common attributes and BGP process, analyzes the model of interdomain traffic engineering and the characteristic of interdomain traffic engineering based on BGP, and summarizes the recent research.