Network management is a kind of very important and complicated technique in communication field. The prior network management technique is mostly based on centralized management mode in which a single network management station directly controls several network devices. The network management station accepts operating reports on alarming, configuring and data collecting of network devices and alike from different network devices. Generally, when the network is rather small, for instance Local Area Network (LAN), it is enough for network management and monitoring using centralized network management system. But when scope of the network is wide and the number of network devices is relatively larger, management capacity of the centralized network management system would be unable to meet requirements on network management and monitoring. The reason is that when a plurality of network devices send alarm information to the centralized network management station or the network management station collects data from network devices, the operation will inevitably occupy the network bandwidth, deplete network resources, and even make the network traffic jammed; secondly, in case of managing numerous network devices in relatively larger network, it is necessary for the centralized network management station to possess excellent ability of ensuring to solve the network problems timely and effectively; what is more, this capacity of the centralized network management station directly influences its management scope, making the system difficult to expand.
With the rapid development of network scale, the traditional network management system is unable to meet the requirements from large networks, thus, it is desirable to provide a new type of network management solution to make network management more flexible and expandable, reduce network load caused by network management, improve management performance, cut response time, satisfy the increasing requirements on network management, especially requirements on MAN and WAN.