32. System Level Design of Address Allocation for a Private IP Network

IP address allocation is very important to data routing, inter-networking and OAM of large IP networks. In this paper, the high level architecture of a private IP network is presented firstly. Then its uniqueness is summarized as large scale multilayer network architectures, independent dual transferring routing of WAN, dual transferring planes of MAN/LAN, support of special requirement such as multicast and external networking. Various address allocation requirements from the above mentioned features are analyzed. Consequently, address spaces are divided according to the network type, routing, devices, and special application requirements. After that, each address space and its future evolution path is presented in details. Finally high level design and analysis of each allocation scheme is presented in sections according to the sequence of MAN, LAN, WAN, multicast and external networking. Field deployment result in the past 2 years has proved the success of the proposed address allocation plan.