Abstract: Satellite network routing algorithm is the focus and the key of the study of satellite network.Simulation system for routing algorithm can simulate the operation of routing algorithm and gives the results about the routing algorithm to provide a basis for the improvement of routing algorithm.Therefore，simulation system for routing algorithm reduces the development costs.This paper presents an approach to build a Distributed Simulation System based on Netfilter and Agent for Satellite Network Routing Algorithm（DSNASNRA）.The simulation system is distributed，scalable，user-friendly，and can intuitively simulate satellite wireless communication link characteristics and so on.Finally，this paper gives the software realization of a satellite network simulation system which is constructed using the above approach.

摘要： 卫星网路由算法是卫星网研究的重点和关键。路由算法仿真系统可以模拟路由算法的运行并给出运行结果，为路由算法的改进提供了依据，降低了开发成本。提出了一种基于Netfilter和Agent的卫星网路由算法分布式仿真系统（Distributed Simulation System based on Netfilter and Agent for Satellite Network Routing Algorithm，DSNASNRA）的构建方法。该仿真系统具有分布式、可扩展、界面友好、可直观模拟卫星间无线通信链路特性等特点。最后给出使用该方法构建的一个卫星网仿真系统的软件实现。