control plane fault detection and processing method based on SDN hierarchical architecture

Abstract

The invention discloses a control plane fault detection and processing method based on an SDN hierarchical architecture, and the method comprises the specific steps: periodically uploading the important data of a controller in a detection plane and a control plane to a cloud for storage protection, and judging whether a controller fault exists or not through periodic detection; if the main detection controller fails, the auxiliary detection controller replaces the main detection controller to carry out detection work; if the domain controllers fail, enabling the main detection controller to collect information of other domain controllers, select the optimal controller as a target controller to migrate the switch, and meanwhile, enable the controllers before and after switching to keep information consistency through synchronization; and after the controller is repaired successfully, automatically obtaining the data from the cloud to recover the data. Through the controller health statedetection method and the cloud data backup, the abnormal controller can be found in advance, and the problems of network paralysis and data loss caused by controller faults in the SDN are avoided.

Description

technical field [0001] The present invention relates to the field of network technology, in particular to a control plane fault detection and processing method based on an SDN layered architecture. Background technique [0002] With the rapid development of network technology, Internet applications are growing explosively, and the amount of global information is increasing exponentially every year. However, in the current network structure, the control plane and data forwarding plane of various traditional network devices are coupled together, which is difficult to meet Network virtualization, cloud computing and other services require fast data transmission and flexible resource allocation. The network needs a new architecture to improve the reliability and flexibility of the network. [0003] Software Defined Network (SDN, Software Defined Network), as a new type of network architecture, separates the control plane and forwarding plane through the OpenFlow protocol, and re...

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Problems solved by technology

[0004] However, in SDN, the controller is responsible for all the business logic of the entire network, and there are problems such as single point of failure and low processing performance.

If the controller fails and is not dealt with in time, the entire network will be paralyzed, and all services will not be able to continue; at the same time, the failure of the controller may also cause data loss and other problems, seriously affecting the performance of the entire network

[0005] In view of the above problems, many solutions to SDN control plane failures have been proposed. However, the current solutions still have the following problems: the existing solutions basically use a single external fault detector to detect faults on multiple controllers. If a fault occurs at the detection point, the detection operation cannot be con

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