Organization Model of network management

In the operation management of a network, the network manager manages the whole network through the network management system, including checking the current working status and working parameters of the equipment or facilities in the network, controlling the working state of the equipment or facilities (such as starting and closing), modifying the working parameters, etc. The network management system carries on the concrete operation to the long-distance network equipment or the facility through the specific transmission line and the control protocol.

where a variable (parameter value) is set up in the device or facility that records the working parameters, the management system may not record these parameters and query the equipment or facilities if necessary. The network management system also needs to reflect the equipment working status of parameters, but these parameters are not every device or facility can be recorded inside, such as a switch is in the normal operation or failure (power off, etc.) need to be recorded outside the device. Therefore, the network management system must also save the like device status such parameters.

In order to achieve the above goal, the general, universal and standard organization model of various network management systems are shown in the following figure. A network management system can be logically considered to be composed of the following four elements: Management process, management Protocol, management agent, management information base.

The Management Information Base (M1B) is the concept collection of management object management information base. The management object is an abstract network element, which corresponds to the data or data addition method (object-oriented concept) which can be manipulated in the network, such as recording the state variable of the equipment or facility working state, the working parameters inside the equipment, the statistic parameters of the equipment used to express the performance.

Some management objects can be controlled externally. such as some working conditions and working parameters; Other Management objects are read-only and can not be modified, such as counter class parameters; There is a class of work parameters are set up because of the management system, for the management system itself services, these collectively referred to as management objects. The management agent operates an instance of a management object instance that has a specific meaning and is defined in a predefined local data.

Instances of administrative agents can be read and written by the administrative process. The administrative agent is relatively passive, transforming the operation request from the management process, confirming that the operation is allowed and possible, and then performing the operation and then issuing the appropriate response.

One of the most important functions of the

Management agent is to convert the formatting requests from the management process into equivalent operations on the local data structures. This feature is done by the management agent's operational support program, which maps the action commands to local operations, which are not implemented identically on each administrative agent.