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System and method for maintaining tcp session during cluster switching

A clustering and step-by-step technology, applied in the transmission system, digital transmission system, data exchange network, etc., can solve the problems of insurmountable communication quality degradation, unresolved data flow continuous connection, etc.

Active Publication Date: 2017-09-29
ARRAY NETWORKS BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem of this invention is that it only solves the continuous connection of routing protocol transmission based on TCP, and does not solve the continuous connection of data streams of all application protocols based on TCP protocol when the load balancing device cluster switches, and still cannot overcome the problem caused by cluster switching. communication quality degradation problem

Method used

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  • System and method for maintaining tcp session during cluster switching
  • System and method for maintaining tcp session during cluster switching

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Embodiment Construction

[0024] In the following description, many technical details are proposed in order to enable readers to better understand the application. However, those skilled in the art can understand that even without these technical details and various changes and modifications based on the following implementation modes, it is still the technical solution claimed by the claims of the present application.

[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the implementation of the present invention in detail in conjunction with the accompanying drawings.

[0026] Such as figure 1 , in a clustered load balancing environment, usually two load balancing devices are used as a cluster. The network system built by the load balancing equipment of the cluster can be composed of the client 10, the Internet 20, the router 30, the load balancing equipment cluster 40 and the real server 50 connected in sequen...

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Abstract

A system for maintaining a TCP session during cluster switching of the present invention is composed of a client, the Internet, a router, a load balancing device cluster and a real server connected sequentially, and the load balancing device cluster is composed of a load balancing master device and a slave device, The master device and the slave device are composed of a load balancing application module, a TCP session backup and recovery module, a TCP module, an IP module and a network card connected to each other. In the present invention, all TCP sessions on the master device are backed up in advance in the slave device. When switching to the slave device, the previous TCP sessions can be restored according to the session metadata backed up from the slave device, thereby ensuring the existing TCP connection sessions are not affected.

Description

technical field [0001] The invention relates to the field of network application delivery control, in particular to a system and method for a load balancing device to maintain a TCP session during cluster switching. Background technique [0002] In the network environment, the function and characteristics of the TCP transmission protocol are responsible for discovering problems in the transmission, sending a signal when there is a problem, requiring retransmission until all data is safely and correctly transmitted to the destination; the function and characteristics of load balancing are for The client provides virtual services and forwards customer requests to subsequent real services, and the load balancing device plays a connecting role between the network and the real server. [0003] In the existing technology, in order to ensure the reliability of network transmission services, clusters are generally used for redundant backup of load balancing devices. When a device fa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/24H04L29/08H04L29/06
Inventor 周清志程飞
Owner ARRAY NETWORKS BEIJING