基于虚拟路由冗余协议和双向转发检测的基层气象通信网络设计和实现

摘要

In the county-level network topology of the Shaanxi meteorological communication system,a single router connects two ISP-links simultaneously.This architecture may lead to high risk of single-point failure and competition for bandwidth among different services as well.To tackle these two problems,this article proposes a dual-router architecture,each connecting an ISP line respectively.Configuring Virtual Router Redundancy Protocol (VRRP),with load balance mode enabled,the data flow sharing between two ISP lines can be realized.Both router hot standby and link redundancy are achieved under this schema.Furthermore,the Bi-directional Forwarding Detection (BFD) is employed to improve the switch speed between Master and Backup router of VRRP.After the application of about one year,the result indicates that the design target is achieved.The system offers a reference for other municipal or county level meteorological network system designing and implementation.%目前陕西省气象宽带通信网省、市、县3级连接中,区县局出口是以单台路由器连接双运营商线路接入市局,这一架构造成明显的路由器单点故障风险,同时也不能有效解决台站各业务之间带宽竞争的问题.据此改造市-县级网络拓扑,在区县局出口部署双路由器,分别对接电信、广电运营商线路.启用VRRP(虚拟路由冗余协议),并配置VRRP的负载分担模式,对台站业务根据带宽消耗和时效性高低进行分流传输,在链路冗余的基础上实现了双机热备和负载均衡.同时配置BFD(双向转发检测协议)和VRRP联动,通过BFD监控VRRP路由器的上行链路状态,实现主备路由器的快速切换.经过在西安市多个区县局的广域网建设实践和一年多的业务运行,收到了预期的效果,方案可为同级气象部门提供参考.