假设校园网通过一台三层交换机连到校园网出口路由器上，路由器再和校园外的另一台路由器链接。现要做适当配置，实现校园网内部主机与校园网外部主机之间的相互通信。为了简化网管的管理维护工作，学校决定采用RIP v2协议实现互通(Assuming that the campus network is connected to the campus network router through a Layer 3 switch, the router is then linked to another router outside the campus. It is necessary to do the appropriate configuration, to achieve the campus network internal host and the campus network between the external communication between the host. In order to simplify the management and maintenance of network management, the school decided to use RIP v2 protocol to achieve interoperability)