基于TCP连接修复的高可靠性主备倒换研究

Research on high-reliability of standby switchover based on TCP connection repair

为满足网络的高可用性,尤其是体现在当设备主备倒换时能够不中断业务的继续转发,文中提出了一种新型的技术:TCP连接修复技术(TCP CONNECTION REPAIR)。区别于传统的主备倒换流程,在设备正常工作时,便将网络的链路状态和数据等信息从主控制盘拷贝到备用控制盘,实现实时同步,以便设备在发生故障时进行主备倒换后能自行完成链路状态的修复和转发表项的重新生成。一方面,实时备份保证了数据状态的精准性。另一方面,该方法分离了数据同步和链路切换,大大缩短了主备倒换的时间,实现了无缝连接。

In order to achieve the high availability of the network,especially equipment standby can＇t interrupt business to continue forward. This paper proposes a new kind of technology： TCP connection repair. It is different from the traditional standby process,when the equipment works,normally equipment puts the network information such as the link status and data copies from the main control panel to the standby control pane to achieve synchronization. So that the equipment in the event of a failure can standby to complete link-state repair and published a regenerated. On the one hand,real-time backup ensures the precision of data state. On the other hand,this way separates the data synchronization and link switching,it greatly shortened the standby time,realized the seamless connection.