(This paper uses a typical dual-homing network topology to illustrate how to deploy OSPF in a small-scale network to achieve network interoperability requirements. It provides area division suggestions, and describes common deployment methods such as traffic deployment, route import, and route aggregation. A detailed description is given, and the matters needing attention in various implementations are given. Through these proposed methods, on the basis of ensuring the interoperability of the entire network, a relatively complete consideration is given in terms of security, routing range, and manageability.)