一种虚拟路由冗余协议负载均衡技术实现机制

标准VRRP（虚拟路由器冗余协议）解决在配置默认网关环境下消除网络单点故障问题，其协议自身不够灵活，即虚拟路由器中只有主设备进行流量转发，其他备用设备均作为备份不进行流量转发，无法负载分担，不能最大程度提高带宽和设备利用率。针对该局限，在此基于与某公司的合作项目，论述了一种虚拟路由冗余协议负载均衡实现机制，在标准VRRP协议分析研究基础上引入虚拟转发器和转发状态机，实现一个虚拟IP对应多个虚拟MAC的机制，无需配置多个备份组就能同时实现路由冗余备份和流量负载均衡，使局域网内用户能够通过每台虚拟转发器与外界通信，极大地提高资源利用率，最后以实验验证了设计可行性。

A realization mechanism for VRRP technology to achieve load balance

Standard VRRP（virtual router redundancy protocol）can solve the problem of single point failure in the network under the condition of configuring a default gateway. However,the protocol itself is not flexible enough. That is,because only a master device in the virtual router participates the traffic retransmission and other backup routers do not perform traffic retrans-mission,this mechanism does not involve load balance,thus bandwidth and equipment utilization can not be maximized. To solve this problem,an enhanced VRRP method to achieve load balancing mechanism is discussed in this paper according to a project cooperating with a company. The virtual forwarder and forwarding state machine are added based on analysis of standard VRRP protocol,by which a mechanism that one virtual IP corresponds to several virtual MAC is realized without configuring more backup groups,and in which routing redundancy and traffic load balancing can be simultaneously achieved to make the users in a LAN communicate with the outside world through each virtual forwarder. Therefore,the method greatly improves re-source utilization. The experiment results verified the feasibility of the design.