A Target Controller Selection Method Considering Multiple Switch Migration Indexes

Abstract

The invention claims to protect a method for selecting a target controller considering multiple switch migration indexes. The fault recovery scheme of the control layer based on the switch migration mechanism can effectively realize the fault recovery of the control layer without deploying additional backup controllers. Aiming at the problem that the switch migration method in the existing switch migration algorithm is single, and most of them only use the switch-controller delay or controller load as the migration index to select the target controller, a target controller selection considering multiple switch migration indexes is proposed. The method (multi-index selection method, M-SM), before the controller fails, the link failure rate, the switch-controller delay and the controller load are used as the metrics to select in advance for each switch in the domain The target controller forms a switch list and sends it to the target controller to ensure that after the controller fails, the target controller can quickly take over the switches in the fault domain.

Description

technical field [0001] The invention belongs to the field of software-defined networks, and aims at the problem of selecting a target controller for software-defined network control layer fault recovery, and proposes a method for selecting a target controller considering multiple switch migration indexes. Background technique [0002] Software Defined Network (SDN) abstracts the control functions in network devices to form a control layer, making the network a resource that can be flexibly deployed. The layered architecture of SDN effectively reduces the complexity of network management, and provides powerful programmability for the network to meet the different needs of network users for network resources. In the early days, only one controller was deployed in the entire SDN to control the entire network. At this stage, with the continuous expansion of the network scale, the network environment has become more and more complex. The entire network is completely dependent on ...

AI Technical Summary

Problems solved by technology

In the existing control layer fault recovery algorithm based on the switch migration method, the switch migration method is extensive, and the selection of the target controller is mostly based on the switch-controller delay or the load of the target controller as the measurement index, which may easily lead to rigid selection of the target controller. Comprehensively consider multiple migration indicators to select the target controller to ensure good overall performance after the fault recovery of the control layer

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