CERNET核心节点网络状态监测系统设计与实现

针对CERNET/CERNET2网络规模不断扩大带来的网络运行状态感知压力，设计一种核心节点间网络质量测量方案，结合多种测量方法实现主干网核心节点网络状态监测，通过Web服务进行可视化分析。使用iPerf软件对节点间网络质量进行测量，设计基于C/S架构的循环控制模块，实现客户端测试任务的自适应顺序调度，构建排队论模型对该方案可行性、稳定性进行理论分析。为对各节点关键路由及数据流信息进行动态监测，依托SNMP（简单网络管理协议）、NetFlow等网络协议，由探针服务器获取主干网路由及流信息。结合分布式监测系统中各节点拓扑耦合关系，为主干网内路由追踪及入/出流量检测提供了科学依据，增强了运维团队对教育网运行状态的动态感知能力。

Design and implementation of CERNET core node network status monitoring system

Aiming at the perceived pressure of network operation status brought about by the continuous expansion of CERNET/CERNET2 network scale, a network quality measurement scheme between core nodes is designed, which combines multiple measurement methods to realize network status monitoring of core nodes of the backbone network, and visual analysis is performed through Web services. Use iPerf software to measure the network quality between nodes, design a cycle control module based on C/S architecture, realize the adaptive sequential scheduling of client test tasks, and build a queuing theory model to theoretically analyze the feasibility and stability of the scheme. In order to dynamically monitor the key routing and data flow information of each node, relying on SNMP (Simple Network Management Protocol), NetFlow and other network protocols, the probe server obtains the backbone network routing and flow information. Combined with the topological coupling relationship of each node in the distributed monitoring system, it provides a scientific basis for routing tracking and incoming/outgoing traffic detection in the backbone network, and enhances the operation and maintenance team''s dynamic perception of the operating status of the education network.