摘要： 对于现在的互联网络通信状况，负载均衡显示其越来越多的重要性，通常实现负载均衡是使用软件并结合相应的算法，该文所描述的是利用Cisco 公司的CSM 模块来实现安全可靠的负载均衡，CSM 模块将客户机的请求分发到不同的虚拟服务器，配合Cisco MSFC模块并合理地进行DNS 的配置，实现网络服务的负载均衡。简要介绍了CSM 模块的工作原理，如何配置DNS，如何设置虚拟主服务器，以及如何对系统CSM 模块进行设置做了描述。

关键词: DNS；负载均衡；NAT；Vlan；集群；虚拟服务器；服务器农场

Abstract: Nowadays the load-balancing is becoming more and more important for Internet communication. The common method of realizing theload balance is to use specific software and homologous arithmetic. This paper describes how to configure Cisco CSM module to realize loadequilibrium on the safe side, and how to use CSM module to distribute the requests from client to different virtual servers, and how to config DNSproperly with the concert of MSFC module, so as to realize load equilibrium on a network. This article introduces the work principle of the CSMmodel simply, and describes how to config DNS, how to config virtual main server, and how to config the systematic CSM module.

Key words: DNS; Load-balancing; NAT; Vlan; Cluster; Virtual server; Server farm