静态路由-CCNA中文版PPT下载

静态路由 由网络管理员在路由器上手工添加路由条目建立路由表 动态路由 根据网络结构或流量的变化，路由协议会自动调整路由表 静态路由和动态路由－目的都是建立路由表 要实现路由,路由器必须知道: 目的地址 源地址 所有可能的路由路径 最佳路由路径 管理路由信息 * Purpose: This figure introduces students to static and dynamic routes. Emphasize: Static knowledge is administered manually—A network administrator enters it into the router’s configuration. The administrator must manually update this static route entry whenever an internetwork topology change requires an update. Static knowledge can be private—by default it is not conveyed to other routers as part of an update process. You can, however, configure the router to share this knowledge. Dynamic knowledge works differently. After the network administrator enters configuration commands to start dynamic routing, route knowledge is updated automatically by a routing process. Whenever new topology information is received from the internetwork, routers update neighbors about the route change.