This question appears in Mumbai University > Telecom Network Management subject

Marks: 10 M

Year: May 2014

• Network Management Model

i. The OSI network model is an ISO standard and is the most superior of all the models; it is structured and it addresses all aspects of management.

ii. Figure1 shows an OSI network management architecture model that comprise four models: organization model, information model, communication model, and functional model.

iii. The organization model describes the components of a network management system, their functions, and their infrastructure. The organization model is defined in ISO- OSI Systems Management Overview. It defines the terms object, agent and manager.

OSI Network Management Model

iv. The ISO information model deals with the structure and organization of management information. ISO specifies the structure of management information (SMI) and the information database, Management Information Base (MIB). SMI describes how the management information is structured and MIB deals with the relationship and storage of management information.

v. The third model in OSI management is the communication model, which has three components: management application processes that function in the application layer, layer management between layers, and layer operation within the layers.

vi. The functional model is the fourth component of OSI management, and it deals with the user-oriented requirements of network management. OSI defines five functional application areas, namely, configuration, fault, performance, security, and accounting. These are defined as system management functions in OSI.

vii. Only OSI presents the complete model for network management; others deal with only a subset or are still in the process of developing standards.

viii. OSI deals with all seven networking layers. It lends itself to addressing service and business management, which is more than just networking.

ix. The second standard listed in Table1 is the SNMP/Internet standard. The IETF does not define architecture for the SNMP management model explicitly. However, it does exist implicitly.

x. The organization, information, and communication models are similar to OSI models. The SNMP network management model addresses the functional model in terms of operations, administration, and security.

xi. SNMP-based management is widely used for campus wide networks, although enterprise-wide networks are also managed by using distributed configurations of SNMP-based network management systems.

xii. The third standard in Table1 is Telecommunications Management Network (TMN), which is based on the OSI model. The focus of the TMN standard is toward managing telecommunications networks. Operations systems support service and business management.

xiii. The fourth standard in Table1 is the IEEE standard on management and is dedicated to the management of layers 1 and 2 of the OSI Reference Model.

xiv. It is applicable to LANs and MANs and addresses standards on broadband network management, which is of great relevance to the current technology.