中小型局域网的设计与规划

毕业设计（论文）

SNL/QR7.5.4-3 中小型局域网的设计与规划

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中小型局域网的设计与规划

摘要：随着网络技术新系统，新领域的长足发展，传统企业也正利用其行业的特点，融合网络技术的优势，发展其身。在信息化生产逐步普及的今天，组建企业内部网络已经是企业必不可少的一部分，建立高速，稳定，安全，智能的办公网络，是组建中小型企业局域网的核心。

本论文所阐述的是企业网络的规划与设计是使用业界流行的核心层——汇聚层——分布层三层结构设计的中小型企业网，结合广为使用的虚拟局域网（VLAN），热备份路由（HSRP），访问控制列表（ACL），网络地址转换（NAT）等技术，增强网络的稳定性和安全性。

设计中采用虚拟局域网来隔离不同部门，以达到增强企业网络安全性目的；在规划好的VALN 的基础上，采用访问控制列表（ACL），设置策略来限制部门之间以及服务器区的访问，进一步提高企业网络内部的安全性；并在核心层交换机上采用热备份路由（RSRP）技术，增加网络的冗余容错功能，提高企业网络的整体稳定性；；采用路由器硬件的动态主机分配协议（DHCP）功能，保证各部门IP地址的获取；在边界路由器上设置网络地址转换（NAT），将企业内部私有地址转为公网地址，实现了多个用户同时共用一个合法IP与外部Internet进行通信，解决IP地址短缺的问题。关键词：中小型；稳定性；HSRP;VLAN;ACL

The design and planning of LAN

Abstract：Along with the network technology rapid development of new systems, new fields, the traditional enterprise also taking advantage of the characteristics of the industry, integration of the advantages of network technology, the development of its body. In the information production gradually popular today, intra company network is already a part of, enterprise essential to build a high-speed, stable, safe, intelligent network, is the core of the formation of small and medium-sized enterprise local area network.

This paper describes the planning and design of enterprise network is the core layer using popular -- convergence layer -- small and medium enterprises network distribution layer three layer structure design, combined with the widely use of virtual local area network (VLAN), hot standby routing (HSRP), the access control list (ACL), network address translation (NA T) technology, to enhance the stability and security of the network.

In the design of the virtual local area network to isolate different departments, in order to enhance the enterprise network security purposes; based on the planned V ALN, the access control list (ACL), setting policy to restrict access to the server between departments and regions, to further improve the security of the enterprise internal network; and the hot standby routing in the core layer switch (RSRP) technology, increasing redundant fault-tolerant function of the network, improve the overall stability of the enterprise network;; dynamic host configuration protocol using router hardware (DHCP) function, obtain the departments IP address; setting network address translation in the boundary router (NAT), the internal private address to the public address, realize the multiple users to simultaneously share a legitimate IP and external Internet to communicate, solve the shortage of IP address.

Keywords:small and medium; stability; HSRP; VLAN; ACL