福州大学：《计算机网络管理》课程PPT教学课件（英文）Chapter 3 Basic Foundations Standards, Models and Language

Chapter 3 Basic foundations: Standards,Models and Language Chapter 3 introduces technical foundations of standards,models,and language that are needed to build network management systems based on various standards.The currently specified network management standards are SNMP (Internet), CMIP (OSD),TMN,IEEE,and Web-based management. SNMP (Simple Network Management Protocol)is the most widely deployed management system because of its truly simple architecture and implementation

Chapter 3 Basic Foundations: Standards, Models and Language Chapter 3 introduces technical foundations of standards, models, and language that are needed to build network management systems based on various standards. The currently specified network management standards are SNMP (Internet), CMIP (OSI),TMN, IEEE, and Web-based management. SNMP (Simple Network Management Protocol) is the most widely deployed management system because of its truly simple architecture and implementation

Chapter 3 Basic Foundations: Standards,Models and Language To manage networks,systems,and services,there are several management standards and models in existence. We will consider the foundations of various network management models and protocols,survey the network management standards,and present the general architecture of network management models in Section 3.1. The International Standards Organization has defined a generalized model that addresses all aspects of network management.This is discussed in Section 3.2.In Sections 3.3 through 3.5 we cover the three models of the architecture that deal with organization

Chapter 3 Basic Foundations: Standards, Models and Language To manage networks, systems,and services, there are several management standards and models in existence. We will consider the foundations of various network management models and protocols, survey the network management standards, and present the general architecture of network management models in Section 3.1. The International Standards Organization has defined a generalized model that addresses all aspects of network management. This is discussed in Section 3.2. In Sections 3.3 through 3.5 we cover the three models of the architecture that deal with organization

Chapter 3 Basic Foundations: Standards,Models and language information,and communication.Then we will learn in Sections 3.6 through 3.8,the basics of the formal language,ASN.1,and the data structure that management systems use to store information and communicate with each other. Section 3.9 presents the fourth model of network architecture,the functional model,which addresses the applications that fall into the categories of fault, configuration,performance,security,and accounting In a global perspective,three areas of network need managing:network,systems,and services;

Chapter 3 Basic Foundations: Standards, Models and Language information, and communication. Then we will learn in Sections 3.6 through 3.8, the basics of the formal language, ASN. 1, and the data structure that management systems use to store information and communicate with each other. Section 3.9 presents the fourth model of network architecture, the functional model, which addresses the applications that fall into the categories of fault, configuration, performance, security, and accounting. In a global perspective, three areas of network need managing: network, systems, and services;

Chapter 3 Basic Foundations: Standards,Models and Language interlayer protocols;and intralayer protocols. We define network management as management of the network comprising nodes and links,and system management as management of a system's resources,such as central processor usage,disk usage,and application processes.Service management deals with services provided by organizations to customers.Service management is an extension of network and systems management

Chapter 3 Basic Foundations: Standards, Models and Language interlayer protocols; and intralayer protocols. We define network management as management of the network comprising nodes and links, and system management as management of a system's resources, such as central processor usage, disk usage, and application processes. Service management deals with services provided by organizations to customers. Service management is an extension of network and systems management

Chapter 3 Basic Foundations: Standards,Models and Language The Open System Interconnection (OSD) management standard is the standard adopted by the International Standards Organization (ISO). The OSI management protocol standard is Common Management Information Protocol (CMIP),and has built-in services,Common Management Information Service (CMIS),that specify the basic services needed to perform the various functions.It is the most comprehensive set of specifications,and addresses all seven layers of the OSI Reference Model.Both LANs and WANs can be managed using CMIP/CMIS

Chapter 3 Basic Foundations: Standards, Models and Language The Open System Interconnection (OSI) management standard is the standard adopted by the International Standards Organization (ISO). The OSI management protocol standard is Common Management Information Protocol (CMIP), and has built-in services, Common Management Information Service (CMIS), that specify the basic services needed to perform the various functions. It is the most comprehensive set of specifications, and addresses all seven layers of the OSI Reference Model. Both LANs and WANs can be managed using CMIP/CMIS

Chapter 3 Basic Foundations: Standards,Models and Language Simple Network Management Protocol (SNMP)is truly simple,as its name indicates.It started as an industry standard and has since become very much like the standard specifications of a standards-setting organization.The Internet Engineering Task Force (IETF)is responsible for all Internet specifications including network management.The managed objects are defined as scalar objects in SNMP,which was primarily intended to manage Internet components,but is now used to manage WAN and telecommunications systems.Probably because it is easy to implement, SNMP is the most widely implemented network management system today

Chapter 3 Basic Foundations: Standards, Models and Language Simple Network Management Protocol (SNMP) is truly simple,as its name indicates. It started as an industry standard and has since become very much like the standard specifications of a standards-setting organization. The Internet Engineering Task Force (IETF) is responsible for all Internet specifications including network management. The managed objects are defined as scalar objects in SNMP, which was primarily intended to manage Internet components, but is now used to manage WAN and telecommunications systems. Probably because it is easy to implement, SNMP is the most widely implemented network management system today

Chapter 3 Basic Foundations: Standards,Models and Language The IEEE standards for LAN and MAN (metropolitan area network)specifications are concerned only with OSI layers 1 (physical)and 2 (data link),and they are structured similarly to OSI specifications.Both OSI/CMIP and Internet/SNMP protocols use IEEE standards for the lower layers. The IEEE 802.x series of specifications defines the standards for the various physical media and data link protocols.IEEE 802.1 specifications present overview,architecture,and management.The IEEE 802.2 standard specifies the logical link control (LLC) layer

Chapter 3 Basic Foundations: Standards, Models and Language The IEEE standards for LAN and MAN (metropolitan area network) specifications are concerned only with OSI layers 1 (physical) and 2 (data link), and they are structured similarly to OSI specifications. Both OSI/CMIP and Internet/SNMP protocols use IEEE standards for the lower layers. The IEEE 802.x series of specifications defines the standards for the various physical media and data link protocols. IEEE 802.1 specifications present overview, architecture, and management. The IEEE 802.2 standard specifies the logical link control (LLC) layer

Chapter 3 Basic Foundations: Standards,Models and Language the LLC layer provides transparency of the various physical media and protocols to the network layer.The other specifications in the IEEE series are for specific media and protocols.For example,802.3 specifications are for Ethernet LANs. Web-based management is based on using Web technology,a Web server for the management system, and Web browsers for network management stations. Two technologies are in vogue,Web-Based Enterprise Management(WBEM) and Java Management Extensions (JMX).A recently formed task force, Desktop Management Task Force (DMTF),is developing specifications for WBEM

Chapter 3 Basic Foundations: Standards, Models and Language the LLC layer provides transparency of the various physical media and protocols to the network layer. The other specifications in the IEEE series are for specific media and protocols. For example, 802.3 specifications are for Ethernet LANs. Web-based management is based on using Web technology, a Web server for the management system, and Web browsers for network management stations. Two technologies are in vogue, Web-Based Enterprise Management(WBEM) and Java Management Extensions (JMX). A recently formed task force, Desktop Management Task Force (DMTF), is developing specifications for WBEM

Chapter 3 Basic Foundations: Standards,Models and Language Standard and its Salient Points OSI/CMIP:International standard (ISO/OSI). Management of data communications networks- LAN and WAN;Deals with all seven layers; Object oriented;Well structured and layered; Consumes large resource in implementation SNMP/Internet Industry standard (IETF); Originally intended for management of Internet components,currently adopted for WAN and telecommunication systems;Easy to implement; Most widely implemented;

Chapter 3 Basic Foundations: Standards, Models and Language Standard and its Salient Points • OSI/CMIP : International standard (ISO/OSI) . Management of data communications networks- LAN and WAN; Deals with all seven layers; Object oriented; Well structured and layered; Consumes large resource in implementation • SNMP/Internet : Industry standard (IETF); Originally intended for management of Internet components, currently adopted for WAN and telecommunication systems; Easy to implement; Most widely implemented;

Chapter 3 Basic Foundations: Standards,Models and Language TMN International standard (ITU-T); Management of telecommunications network; Based on OSI network management framework; Addresses both network and administrative aspects of management; IEEE IEEE standards adopted internationally; Addresses management of LANs and MANs; Adopts OSI standards significantly;Deals with first two layers of the OSI Reference Model Web-Based Management:Web-Based Enterprise Management (WBEM);Java Management Extensions (JMX)

Chapter 3 Basic Foundations: Standards, Models and Language • TMN : International standard (ITU-T); Management of telecommunications network; Based on OSI network management framework; Addresses both network and administrative aspects of management; • IEEE :IEEE standards adopted internationally; Addresses management of LANs and MANs; Adopts OSI standards significantly; Deals with first two layers of the OSI Reference Model • Web-Based Management:Web-Based Enterprise Management (WBEM); Java Management Extensions (JMX)