在部署上网数据专线时,针对如何有效实现链路失效时的自动检测,并完成业务流量的自动快速切换问题,以电信级数据承载网为基础平台,根据IP SLA以及BFD这两种技术的工作原理,结合数据专线上网业务的热备冗余需求提出了解决方案.采用检测机制与路由倒换进行联动,在故障发生时实现冗余链路的自动倒换,达成互为备份功能.实验比较显示,基于BFD技术的路由联动热备方案可以提供中断时间低于200毫秒级的冗余保护,是未来高端用户的首选热备方案.%Considering how to realize the automatic detection of the link and complete the automatic and quick switchover of the traffic flow when a special line for the Internet data is deployed,this paper proposes the solution in order to solve the hot-redundancy for the special internet business base on the carrier-grade data bear the network and combined with working principle of IP SLA and BFD.The solution is that the detection mechanism and route switching is ganged,and the redundancy link realizes automatically change to reach the backup function in the breakdown.Though the test,the hot standby solution of the routine linkage basd on the BED technique can provide the redundancy protection under the 200 millisecond of break period,and will be the first choice for the high-end users in the future.
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