One of the challenges the current Internet faces is the scalability of routing system. The rapid growth of routing table and the more and more frequent updates of BGP are bringing heavy pressure on the performance, complexity, energy consumption and cost of core routers. In recent years, many researchers have been seeking solutions for these issues. One of the key research directions is splitting the current IP address into separate identifiers and locators. This paper proposes a novel ID/locator split solution, which forms dual IP address spaces architecture. It overcomes the difficulty of implementation and deployment. Also, it not only mitigates the routing scalability issue, but also solves the IPv4 address exhaustion problem. Besides simple modification on DNS and installation of a gateway for each user network, the original backbone network and user networks do not need any modification.