Scalable Routing System-oriented Virtual Routing Technology

With the rapid development of Internet, multi-homing, traffic engineering, supportinghost mobility and other new services needs produce gradually, which make the currentInternet architecture in face of grave scalability problems. Experts and scholars are designingand developing a new network architecture to solve these problems in different ways.Solution based on address space separation and the technology of virtual routing aggregationare widely respected in a variety of models. In connection with the scalable routingtechnology, this paper conducted the following aspects of study:First of all, this paper analyzes the key points and difficulties of based onaddress spaceseparation technology. It summarizes five key issues, including the storage and queries of themapping information, the study of the mapping information, supporting wire-speed packetsforwarding and communication delay, the deployment of the core network device and thedesign of the border router PE. Then this paper introduces four kinds of typical model: LISP,APT, HIP, and AMIA, including in-depth analysis and comparison of their merits anddemerits. It describes virtual polymerization techniques in detail, corresponding description ofits workflow. According to the merits and demerits of these four options, it confirms the studydirection of the new scalable routing system---the combination of address space separationand virtual polymerization techniques.Secondly, this paper presents the new scalable routing architecture VASA, and describesin detail of its workflow, such as inner-domain data forwarding, inter-domain data forwarding,the principle of storage of mapping information and routing information. And it analyzes themerits of the routing storage performance of the model. The core idea is increasing virtualpolymerization techniques based on existing AMIA model that could reduce the table entry ofFIB table in Internet P, PE to achieve the purpose on routing further extension. In the nextplace, it focuses on the three important techniques related to this model----4over6packetsencapsulation technology, MPLS encapsulation technology and extended BGP protocol.Thirdly, according to the operational theories and relevant principles, through GNS3software, it simulates and configures the network topology and proves that the FIB table of Prouter in AS can transfer the packets to the egress edge router, then to the destination address,even not storing the extra-domain routing information; Through using the core equipmentVMFS in NS3+CLICK software analog system and the function of edge router PE, simulatingand building scalable routing topology structure, it proves the connectivity.Finally, it looks forward to the further study direction to address separation structure.