本文章用OPNET作为工具，建设不同的模拟场景和参数，分析RIP，EIGRP和OSPF这三种路由协议的优缺点。-Performance Analysis of RIP, EIGRP, and OSPF using OPNET.Routing protocols are key elements of modern communication networks. Currently deployed dynamic routing protocols that are used to propagate network topology information to the neighboring routers are Routing Information Protocol (RIP), Enhanced Interior Gateway Routing Protocol (EIGRP), and the Open Shortest Path First (OSPF) protocol. The choice of the right routing protocol depends on a number of parameters. In this paper, we use OPNET Modeler to analyze the performance of RIP, EIGRP, and the OSPF protocols, which are commonly deployed in Internet Protocol (IP) networks. We designed various simulation scenarios to compare their performance.