| In the modern communication network,the stability and reliability of the mainframe communication equipment are paid more and more attention by the public.In order to improve the reliability of the equipment,not only the continuous operation time of the equipment,it is also one of the problems that need to be solved to study how to quickly recover the equipment from the fault.In this thesis,the TCP connection repair technology is studied to ensure the data forwarding in the equipment fault,and then the NSR function is realized with the popular distributed dual master control device,which ensures the equipment to recover from the fault quickly.Improve the reliability of the equipment.Compared with other ways to implement NSR connection repair technology,it is more stable and convenient because of the new "repair mode" under the LINUX kernel to realize the heat transfer between devices.It is more applicable to different protocols.In this paper,the principle of TCP connection repair technology is analyzed in detail,and the steps of each step are described in detail.The interaction and application between TCP and different modules are given in combination with external modules.Then combined with the main and standby switching technology to explain the TCP connection repair technology to achieve the specific mode of NSR,given the expected objectives and design scheme,and analyzed its feasibility.Finally,the test part of this thesis sets up a typical network through the remote switching equipment in my internship company,and configures the complex business and protocol simulation environment.The equipment was tested to recover to normal state after failure.The switching within 50 Ms after the failure of multi-service and different protocols is verified.The test results show that it is feasible to realize NSR through TCP connection repair technology and it is good for different protocols to re-establish the connection,thus further improving the reliability of the equipment. |
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