双出口校园网路由控制技术研究

Research on Two Exit Campus Network Routing Control Technology

目前,很多高校校园网都拥有CERNET和ChinaNet等两个以上的出口,形成了多出口路由访问互联网的局面。这种连接方式大大提高了不同网络资源的访问速度,但由于访问路径的部分不对称,由此产生一些问题,如电子邮件收发时会被拒收等。经过分析研究控制访问路径的方法,使用基于源地址的策略路由以及创建扩展NAT地址映射两种方法,对路由器进行合理配置,能够达到解决问题的目的。

Now many university campus networks have two or more exports such as Cernet and ChinaNet.It results in the situation of multi-export route accessing the Internet.This connection greatly increases the access speed of different network resources,but as part of dissymmetries of access path,it results in some problems,such as the E-mail is rejected to accept in case of sending or receiving E-mail.By analyzing and researching the method to control the access path,using the methods of source address-based policy routing and creating the extended NAT address mapping,configuring the router reasonably,the goal of solving these problems can be attained.