运营商IP城域网运营级地址转换部署技术探讨与研究

Discussion and Research on CGN Deployment Technology of Operator IP Metropolitan Area Network

目前IP城域网一般采用集中式运营级地址转换(CGN)或者分布式CGN部署方案解决IPV4地址匮乏问题,这两种方案均存在投资过大等不利因素。从CGN集中备份、分布式部署的技术可行性分析,然后从工程造价进行对标,可以得出在IP城域网实施CGN集中备份分布式部署方案可以大幅降低网络建设成本的结论。值得在IP城域网建设中进行推广应用。

Usually, centralized mode CNG or distributed mode CGN is adopted in solving the IPV4 address depletion, in current metropolitan area network（MAN）. However, large scale of investment still exit, in both two methods, In this paper, an integrated backup distributed mode CGN is proposed in IP MAN. Analyses of CGN integrated backup, technical feasibility in distributed mode CGN are given and project costs are compared. This paper concludes that, the cost of network construction can be significantly reduced by taking the integrated backup distributed mode CGN. And it is worthy to popularized and applied in MAN construction.