网络冗余保护技术的研究与实现

I网络冗余保护技术的研究与实现摘要.现在网络服务的安全性和可靠性变的越来越重要,如果网络中的网关设备出现问题,将会导致网络不能提供正常的服务。本文利用集群技术一一虚拟路由冗余协议(virtualRouterRedundaneyprotoeol,简称 VRRP)来实现网关的高可用性,使得在一台网关设备宕机时,另外一个备份网关会及时接管转发工作,不会造成互联网业务中断,提高了网络服务质量。本文首先介绍高可用性的基本技术,对常用的数据链路层和网络层冗余保护技术进行了论述,并对它们各自的不足进行了分析。然后详细说明了 VRRP 协议的工作原理,包括协议中所用到概念的定义、协议运行所需参数的确定、协议运行的内在机制、网关的选举策略和选举实施。在研究 VRRP 协议同步过程中可能出现的安全性和稳定性问题后,给出了优化该协议的改进方案。关键字:高可靠性;虚拟路由;冗余保护;负载均衡;vRR 卫实例IIAbstractNow the security and reliability of the network service become more and more important, if there is a problem in the network gateway equipment, will cause the network cannot provide the normal service. In this paper, using cluster technology one one virtual router redundancy protocol (virtualRouterRedundaneyprotoeol, referred to as VRRP) high availability to achieve the gateway, the gateway device in a crash, another backup gateway will promptly take forward work, will not cause the Internet service interruption, improve the quality of network service.This paper first introduces the basic technology for high availability, the data link layer and network layer redundancy protection techniques are discussed, and their respective shortcomings were analyzed. Then a detailed description of the working principle of VRRP protocol, including the protocol used in the definition of the concept, the protocol required parameters, protocol operation mechanism, gateway strategy and the implementation of the election campaign. Security and stability problems may arise in the study of VRRP protocol ...