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System and method for quickly and continuously switching services when SDN cluster breaks down

A switching system and failure technology, applied in transmission systems, digital transmission systems, data switching networks, etc., can solve the problems of SDN cluster failover time-consuming and service interruption, etc.

Active Publication Date: 2019-09-17
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art described above, and propose a system and method for rapid and continuous switching of services when an SDN cluster fails, which is used to solve the problems of long time-consuming switching and service interruption when the existing SDN cluster fails.

Method used

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  • System and method for quickly and continuously switching services when SDN cluster breaks down
  • System and method for quickly and continuously switching services when SDN cluster breaks down

Examples

Experimental program
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Effect test

Embodiment 1

[0027] In the SDN cluster, since the east-west interface cannot be used for clustering between heterogeneous controllers, a vertical architecture is required. In the vertical architecture, if an SDN controller is abnormal, a redundant SDN controller needs to be used. replace. In the existing solution, the redundant SDN controller needs to be kept in the startup state as a slave node for real-time backup and standby, and will switch only when an exception occurs. At this time, it is impossible to ensure that the data backed up by the redundant SDN controller is not polluted. As a result, it still cannot work normally after recovery. In addition, although this solution avoids the time-consuming startup of the redundant SDN controller, because the SDN switch needs to disconnect the connection with the abnormal SDN controller, establish a connection with the redundant SDN controller and wait It still takes a long time to automatically synchronize information, and the process may c...

Embodiment 2

[0034] When the SDN cluster fails, the overall composition of the business rapid continuous switching system and the setting of each module are the same as in embodiment 1, and the decision-making module:

[0035] As an independent application, the decision-making module is written in Python, runs on a separate virtual machine or physical machine, uses RESTful API to provide external interaction, and uses HTTP request for external interaction.

[0036] A. The internal self-defined decision-making algorithm of the decision-making module judges the trusted status of the SDN controller every certain interval. The trusted status is divided into trusted and untrusted. When the global backup module needs to obtain the trusted status of the SDN controller with a certain ID, Response to the GET request of the global backup module:

[0037] GET / trust / id

[0038] Where id is the SDN controller ID, and the decision-making module returns its latest decision-making result according to th...

Embodiment 3

[0045] The overall composition of the business rapid continuous switching system and the settings of each module when the SDN cluster fails are the same as those in Embodiment 1-2, and the global backup module:

[0046] As an independent application, the global backup module is written in Python and runs on a separate virtual machine or physical machine. It uses RESTful API to provide external interaction, uses HTTP request for external interaction, and uses SQL database to store SDN controller information.

[0047] The content stored in the SQL database of the global backup module is the ID of the SDN controller and the last credible backup time of the SDN controller.

[0048] I. The global backup module confirms the credible status of each SDN controller in the SQL database list at regular intervals, performs backup, and uses the hash value after string connection between the SDN controller ID and the last backup time as the storage of the backup snapshot Name, store the sna...

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Abstract

The invention provides a system and a method for quickly and continuously switching services when an SDN (Software Defined Network) cluster breaks down. The system and the method solve the problems of service interruption and long consumed time for recovering a normal state due to abnormality of an SDN controller in an existing heterogeneous SDN cluster. According to the switching system, a decision module, a global backup module, a pre-connection module and an instruction agent module are added to an original SDN cluster architecture; a method of trusted decision making, trusted backup, asynchronous starting, pre-connection and instruction agent is used, and the functions of fast switching to an available controller and fast service recovery when an SDN controller breaks down are achieved by executing global backup, abnormity judgment, abnormity confirmation, backup recovery, switching preparation, formal switching and interruption processing and cluster updating. The method has the advantages that the redundant controller does not need to be started in advance, correct backup is guaranteed, the switching time is short, and services are continuous. The method can be applied to the field of SDN cluster construction and maintenance.

Description

technical field [0001] The invention belongs to the technical field of network control, and further relates to a software-defined network in the field of network control, in particular to a system and method for continuous and rapid service switching when an SDN cluster fails. It can be used in the field of SDN cluster construction and maintenance. Background technique [0002] Software Defined Network (Software Defined Network, SDN) is a new network innovation architecture proposed by the CleanState research group of Stanford University in the United States, and it is a way to realize network virtualization. Its core technology, OpenFlow, separates the control plane of network equipment from the data plane, thereby realizing flexible control of network traffic, making the network more intelligent as a pipeline, and providing a good platform for core network and application innovation. [0003] In the SDN architecture, the controller can be said to be the core of SDN. It i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/931H04L12/939H04L29/08
CPCH04L49/10H04L49/557H04L49/552H04L67/1095H04L67/56
Inventor 杨超马宝林马建峰李兴华杨力郭晶晶潘晓波张晓涵智一方
Owner XIDIAN UNIV
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