Research And Implementation Of Campus Network Device Access Status Assessment And Deduction System

With the proposal of “digital campuses”,“smart campuses” and other construction goals,campus network construction has opened up a process of rapid development.The scale of access equipment in campus network is expanding continuously,the geographical distribution becomes increasingly widespread,and the functional coverage is gradually complete.Maintaining the availability and security of access devices has become the primary task for all information centers.The research and exploration of active operation and refinement management mechanism has also become the main direction and content of its construction.Entrusted by the information center of a university,this thesis studys and implements an active operation and maintenance mechanism based on the assessment and deduction of equipment access status,which can perform meticulous management of universal terminal equipment in the management area.This thesis first analyzes and validates the feature data sets of terminal equipment that can be used to determine the status and its feasible acquisition techniques.By analyzing the regulars and characteristics of the network port logs and data packets during the startup of the access device,a method of acquiring the device access status in a “non-intrusive” manner is proposed which can achieve universality.At the same time,a research scheme that combines “timing characteristics” and “flow and density characteristics” is designed.This thesis designs and implements a prototype system that meets the needs of the university's information center,and focuses on designing an assessment and deduction framework which can be used for the algorithms and functions expansion in the follow-up work.At the same time,an anomaly detection model based on isolation forest algorithm is designed and implemented for monitoring whether the export flow is abnormal when the equipment starts,and achieves the assessment and deduction.With the experimental analysis,this thesis designs a unified data interface protocol to standardize the port data of each device,which can be used as the input source of the data server.And it can facilitate the expanding the pre-acquisition server function.This thesis designs and implements a log-based flow generation simulator for simulation device port communication,which can be used as a simulation data source for abnormal simulation and algorithm verification.The campus network device access status-based assessment and deduction system explores a method and mechanism for implementing active operation and fine management of universal access equipment.It has a good practical value and provides a new idea for the construction of campus network management mechanism.