嵌入式网络设备TCP高可用技术研究

发布时间：2018-07-10 13:23

本文选题：嵌入式网络设备 + TCP　；参考：《小型微型计算机系统》2013年02期

【摘要】：对数据网络中嵌入式双主控设备和虚拟集群交换系统的TCP高可用技术进行了研究.提出一种新的TCP高可用方案,该方案对TCP/IP协议栈和TCP应用软件做少量改动.主用设备只需在TCP连接建立或关闭时向备用发送TCP连接同步信息,备用设备上TCP/IP栈收到同步信息后强制创建或关闭TCP套接字并将相应信息保存到TCP控制块,同时将TCP套接字信息通知TCP应用做相应处理;主用故障时备用切换为主用,转主用后TCP同步连接根据收到的第一个TCP包初始化TCP连接的发送和接收序列号等信息并完成TCP连接的倒换.该TCP高可用方案在实际设备中得到了应用,测试和实际工程应用表明,主备间只需要很少的通信量就可以实现TCP连接同步,且主备倒换时TCP连接能在毫秒级的时间成功切换.
[Abstract]:The TCP high availability technology of embedded dual master devices and virtual cluster switching system in data network is studied. In this paper, a new TCP high availability scheme is proposed, in which the TCP / IP stack and TCP application software are slightly modified. The primary device only sends the TCP connection synchronization information to the standby when the TCP connection is established or closed. The TCP / IP stack on the standby device, after receiving the synchronization information, forces the creation or closure of the TCP socket and saves the corresponding information to the TCP control block. At the same time, the TCP socket information is notified to the TCP application to do the corresponding processing. After the transfer, the TCP synchronous connection initializes the sending and receiving serial number of the TCP connection according to the first TCP packet received and completes the switching of the TCP connection. The high availability TCP scheme has been applied in practical equipment. The test and practical engineering application show that TCP connection synchronization can be realized in only a small amount of traffic between master and backup, and TCP connection can be switched successfully in millisecond when the master and standby switch.
【作者单位】：华中科技大学计算机学院;武汉邮电科学研究院;
【基金】：科技部2008科研院所技术开发研究专项资金项目资助国家发改委2008电子信息产业振兴和技术改造国家项目资助
【分类号】：TP393.08

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