Method for realizing TCP (transmission control protocol) application main and standby changeover

Abstract

The invention discloses a method for realizing TCP (transmission control protocol) application heat changeover between main equipment and standby equipment, which includes: a TCP application module running in the main equipment sends TCP application configuration and state synchronous information to the online standby equipment in real time, and the standby equipment corrects corresponding data structure; when TCP connection of the main equipment is successfully established / closed, a TCP / IP (internet protocol) stack sends synchronous TCP connection information to the standby equipment, the standby equipment establishes / closes connection in the TCP / IP stack, after main and standby changeover, the TCP / IP stack receives a TCP packet, if the TCP connection is synchronous, the TCP / IP stack receives a first data packet according to changeover, and packet sending serial numbers and packet receiving confirming serial numbers of connection are initialized, the TCP application module starts a timer after changeover and starts receiving the data packets. Heat changeover between the main equipment and the standby equipment in double master control equipment or a virtual system can be realized by the method, reliability and availability of IP data network equipment are effectively improved, and the requirements of IP data network services are met.

Description

technical field [0001] The invention relates to the field of IP data network equipment, in particular to a method for realizing TCP application main-standby hot switching. Background technique [0002] The modern information society is increasingly dependent on the Internet, and has higher and higher requirements for the reliability and availability of the network, such as security, finance, data centers and other fields. The network is built by related equipment and transmission lines. With the improvement of IP (Internet Protocol, the protocol for interconnection between networks, that is, Internet Protocol) in the network, data in the network (including fixed network and mobile network) The use ratio of network equipment is also gradually increasing, so the requirements for the reliability and availability of data network equipment are also getting higher and higher. [0003] Data network equipment is composed of hardware and software running on it. In order to enhance t...

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Problems solved by technology

see figure 1 As shown, the software system of data network equipment can be divided into hardware support software (BSP / driver), operating system software, TCP / IP stack software, layer-2 protocol software, layer-3 protocol software, network management software, etc., in order to realize the main For hot standby switchover, software modules above the operating system software in the device software system may need to implement the synchronization function of the protocol. Among them, TCP-based applications are connection-oriented. If the peer device finds that the TCP connection is interrupted, the TCP-related applications will Interruption, so the synchronization of the active and standby systems based on the TCP-based three-layer protocol software is the most difficult

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