Controller load balancing method based on switch dynamic migration

Abstract

The invention provides a controller load balancing method based on switch dynamic migration. The method comprises firstly setting the upper limit of the network load threshold of each controller in aresource pool; determining whether the load of each controller in the resource pool exceeds the set threshold by comparing the upper limit with the periodically measured and collected load condition of the controller; if so, adding controllers through a network management protocol, or if not, directly going to the next step; setting the load of the controller as an optimization objective function,and determining an immigration region and an emigration region in the numerous feasible regions of a SDN; setting the sub-region mobility and the valid period of a switch, and finally performing theswitch migration.

Description

technical field [0001] The invention belongs to the technical field of software-defined network and load balancing, and in particular relates to a controller load balancing method based on switch dynamic migration. Background technique [0002] Software Defined Network (SDN) is a new network innovation architecture. Its core technology, OpenFlow, separates the control plane of network equipment from the data plane, thereby realizing flexible control of network traffic and providing a foundation for the innovation of core networks and applications. Provides a good platform. The software-defined network based on OpenFlow has become an emerging network technology in recent years. The main feature of this technology is that the forwarding plane and the control plane are completely decoupled, and the controller is responsible for managing the entire network. In the existing single-controller deployment architecture, the centralized control strategy reduces the scalability and fl...

AI Technical Summary

Problems solved by technology

Dixit et al. proposed an Elasticon architecture, which added a load adaptation decision-making module. Based on the dual thresholds, when the load of the controller exceeds the upper and lower thresholds, the dynamic migration between the controller and the switch is realized through the dynamic migration of the switch. The shortcoming is that it does not consider the simultaneous overloading of multiple controllers

In the migration strategy with the lowest utilization rate, it is proposed to select the controller with the lowest resource utilization rate as the migration target of the switch. Although the migration efficiency is improved, the search process for the target controller is relatively complicated, and the controller consumes a lot of resources for communication and interaction, which reduces the Controller Stream Processing Performance

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