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Transcript of Network management
(OAM and P)
Network management is service which is added in network to make easier management and monitoring of network and network elements. Network Management involves the planning, organizing, monitoring, accounting, and controlling of activities and resources.
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Network management refers to the activities, methods, procedures, and tools that
pertain to the operation, administration, maintenance, and provisioning of networked
systems. The overall aim of network management is higher productivity and better
performance, which results in financial improvement.
Some systems require only Operation, Administration and Maintenance (OA and M) functions without extensive provisioning features. So the term OA and M is also popularly used for the management systems.
(1) Business Management Level (BML)
(2) Service Management Level (SML)
(3) Network Management Level (NML)
(4) Element Management Level (EML)
This includes the kinds of capabilities listed below:-
1. Identify when a network component such as a router, a server, a communication transmission facility, etc. fails, and then be able to activate an alternative until the failed equipment is brought back online
2. Change configuration parameters remotely, thereby eliminating personal visits to the equipment
3. Monitor general network performance to detect bottlenecks and identify their remedy
4. Provide at a moment’s notice a complete list of installed equipment and software, along with all pertinent identification information such as serial numbers
5. Detect the addition of any new devices, whether an interconnection device or a simple PC, to the network
6. Authorize new users (or remove unauthorized users) and track their usage
7. Perform the above functions from a designated central station, irrespective of how geographically distributed the network actually is; if desirable, enable departmental network management, with the central organization handling a subset of the above problems.
To achieve those goals these chapter will focuses on the network management
functions and the different approaches to manage the network through discussing the
1) Network Management
2) Network Management Functional Area.
3) Telecommunication Management Network (TMN).
4) Next Generation Network Management. (NGN)
5) Operation, Administration, Maintenance and Provisioning OAM&P.
6) Telecom Operations Map (TOM), and enhanced Telecom Operations Map(eTOM).
(1) Operations: coordinates actions between administration, maintenance, and provisioning.
(2) Administration: designing the network, processing orders, assigning addresses, tracking usage, and accounting.
(3) Maintenance: diagnose and repair things which do not work as planned.
(4) Provisioning: installing equipment, setting parameters, verifying that the service is operational, updating, and de-installation.
The first objective is controlling corporate strategic assets. The modern
corporate communications network is an asset that provides access to important
resources, interpersonal communications, and critical information that supports
The next objective is to control complexity within the network. The constantly
growing network and its various components, protocols, users, and vendors require
that the network manager keep close watch on the increasing technical complexity of
these attributes. Network management continuously strives to keep network
complexity as transparent to the user as possible. Improvement of service is a usermandated
objective that network management must struggle to attain. Users expect
high performance and availability at the lowest possible cost.
Additionally, reduced downtime is important to overall network financial and
performance viability. Network management is charged with reliable configuration,
fault, and maintenance management.
Finally, the costs of carrying out the tasks of network management must be
controlled. The benefits of network management strategies must be weighed relative
to their costs to ensure the overall approach is cost-effective.
OAM and P
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Operation, Administration, Maintenance and Provisioning (OAM and P) are a group of management functions that provide system or network fault indication, performance monitoring, security management, diagnostic functions, configuration and user provisioning.
OAM and P
It is a popular framework among service providers for their network management systems, typically called Operations Support System (OSS) and Business Support System (BSS). The two systems together are often abbreviated BSS/OSS or simply B/OSS.
A brief summary of the OAM and P functions are listed below:
The standard OAM and P architecture definitions were done by the ITU-T in its TMN model, which established a 4-layer model of TMN applicable within an OAM and P system: