tailieunhanh - Lecture Data communications and networking: Chapter 28 - Behrouz A. Forouzan

Chapter 28 - Network management: SNMP. Chapter 28 is devoted to network management. We first discuss the general idea behind network management. We then introduce the client/server application, SNMP, that is used for this purpose in the Internet. Although network management can be implemented in every layer, the Internet has decided to use a client/server application. | Chapter 28 Network Management: SNMP Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 28. 28-1 NETWORK MANAGEMENT SYSTEM We can say that the functions performed by a network management system can be divided into five broad categories: configuration management, fault management, performance management, security management, and accounting management. Configuration Management Fault Management Performance Management Security Management Accounting Management Topics discussed in this section: 28. Figure Functions of a network management system 28. 28-2 SIMPLE NETWORK MANAGEMENT PROTOCOL (SNMP) The Simple Network Management Protocol (SNMP) is a framework for managing devices in an internet using the TCP/IP protocol suite. It provides a set of fundamental operations for monitoring and maintaining an internet. Concept Management Components Structure of Management Information (SMI) Management Information Base (MIB) SNMP Topics discussed in this section: 28. Figure SNMP concept 28. Figure Components of network management on the Internet 28. SNMP defines the format of packets exchanged between a manager and an agent. It reads and changes the status (values) of objects (variables) in SNMP packets. Note 28. SMI defines the general rules for naming objects, defining object types (including range and length), and showing how to encode objects and values. SMI does not define the number of objects an entity should manage or name the objects to be managed or define the association between the objects and their values. Note 28. MIB creates a collection of named objects, their types, and their relationships to each other in an entity to be managed. Note 28. We can compare the task of network management to the task of writing a program. ❏ Both tasks need rules. In network management this is handled by SMI. ❏ Both tasks need variable declarations. In network management this is handled by MIB. | Chapter 28 Network Management: SNMP Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 28. 28-1 NETWORK MANAGEMENT SYSTEM We can say that the functions performed by a network management system can be divided into five broad categories: configuration management, fault management, performance management, security management, and accounting management. Configuration Management Fault Management Performance Management Security Management Accounting Management Topics discussed in this section: 28. Figure Functions of a network management system 28. 28-2 SIMPLE NETWORK MANAGEMENT PROTOCOL (SNMP) The Simple Network Management Protocol (SNMP) is a framework for managing devices in an internet using the TCP/IP protocol suite. It provides a set of fundamental operations for monitoring and maintaining an internet. Concept Management Components Structure of Management Information (SMI) Management Information Base (MIB) SNMP Topics .