Management network--organization Modal

Organizational model: A fundamental component of network management that describes the relationships among all network management components.

NE (network Element): a managed device (an important component in Web Management).

A management interface must be provided through which the management system can communicate with NE.

Management communications are generally asymmetric
A management application plays the role of manager

NE plays the role of agent, supports responding to manager requests and proactively notifies unhealthy events.

In the management system, the agent corresponds to the server, and the manager corresponds to the client.

NE must provide a piece of software that implements the management interface. This software is the agent between the NE and the external manager. Generally called a management agent.

The management agent is conceptually composed of three parts:
A management interface
Supports a management protocol that defines the communication rules between the NE and the management application.

A Management information base
is a conceptual database that conceptually contains the management view of NE.
The conceptual data contained in the database forms the management information.
Management operations are directed towards the conceptual view.
A MIB cannot be confused with a real database, it is a view of the device itself, not a database that actually stores information about the device. This view is a representative of the real device of NE (represent)

Core Agent Logic
It implements the operation of the management interface, the conversion between the MIB, the real device, or the interaction (interact). The request to get the counter is converted into the required information to read out a device hardware register.

The management agent and real resource constitute the management System Agent.

Management information

Management Object (MO):
A chunk that exposes the management information of a real world.

Management Information Base (MIB):
A collection of all management information exposed by the NE to the management application

Management information does not mimic every aspect of the real world, it omits some of the details.

Management system:
Generally only describes the top and bottom of the two components, respectively, the network operator's technical support organization and want to manage the real network.

The management system provides network management to network operators in the form of tools. Including the application of network monitoring, service supply system, maintenance terminal, and so on.

A management system includes the manager and agent.

The management system may also have an internal database that references the cache or Shadowmib as a MIB, and the real MIB is often present in the agent.

Manage your network:
A network called a management network that provides network communication between a management system and a managed system.

Management networks and production networks can be independent of each other and can share physical networks.

On the one hand, NE is connected to the management system through the management port of NE.

Terminals connected to NE are generally referred to as craft (maintenance terminals)

Terminal Services is placed in the location of an intermediate switch (between the real maintenance terminal and NE).

Terminal Services has a collection of entire serial ports that can be connected to multiple NE at the same time.

The second way to connect to NE is through the enternet port, NE cannot route traffic with this port, and has its own IP address.

The third way is to simply use a port that shares other traffic (other traffic represents being routed or swapped), in which case the management traffic is carried in the form of an in-band.

Advantages of the dedicated management network:
Stability
Avoid interference
Easy Network Planning
Safety

A shared network reason:
The cost and overhead of a dedicated management network provide a huge price tag, leading to significant additional costs.
Without a reasonable alternative, a shared network may actually be the only option in quite a few cases.
For example, a scenario involves a digital subscriber line (DSL) router that is located on the site of the customer.

Management network--organization Modal