《计算机网络》课程PPT教学课件（自顶向下方法，英文第三版）第九章 Network Management

Chapter 9 Network Management computer networking James F.Kurose Keith W.Ross A note on the use of these ppt slides: We're making these slides freely available to all(faculty,students,readers). They're in PowerPoint form so you can add,modify,and delete slides Computer Networking: (including this one)and slide content to suit your needs.They obviously A Top Down Approach represent a lot of work on our part.In return for use,we only ask the following: Featuring the Internet, If you use these slides (e.g.,in a class)in substantially unaltered form, 3rd edition that you mention their source(after all,we'd like people to use our book!) f you post any slides in substantially unaltered form on a ww site,that Jim Kurose,Keith Ross you note that they are adapted from(or perhaps identical to)our slides,and note our copyright of this material. Addison-Wesley,July 2004. Thanks and enjoy!JFK/KWR All material copyright 1996-2006 J.F Kurose and K.W.Ross,All Rights Reserved Network Management 9-1

Network Management 9-1 Chapter 9 Network Management Computer Networking: A Top Down Approach Featuring the Internet, 3rd edition. Jim Kurose, Keith Ross Addison-Wesley, July 2004. A note on the use of these ppt slides: We’re making these slides freely available to all (faculty, students, readers). They’re in PowerPoint form so you can add, modify, and delete slides (including this one) and slide content to suit your needs. They obviously represent a lot of work on our part. In return for use, we only ask the following: ❑ If you use these slides (e.g., in a class) in substantially unaltered form, that you mention their source (after all, we’d like people to use our book!) ❑ If you post any slides in substantially unaltered form on a www site, that you note that they are adapted from (or perhaps identical to) our slides, and note our copyright of this material. Thanks and enjoy! JFK/KWR All material copyright 1996-2006 J.F Kurose and K.W. Ross, All Rights Reserved

Chapter 9:Network Management Chapter goals: introduction to network management o motivation o major components Internet network management framework o MIB:management information base o SMI:data definition language o SNMP:protocol for network management o security and administration presentation services:ASN.1 Network Management 9-2

Network Management 9-2 Chapter 9: Network Management Chapter goals:  introduction to network management  motivation  major components  Internet network management framework  MIB: management information base  SMI: data definition language  SNMP: protocol for network management  security and administration  presentation services: ASN.1

Chapter 9 outline What is network management? Internet-standard management framework o Structure of Management Information:SMI o Management Information Base:MIB o SNMP Protocol Operations and Transport Mappings o Security and Administration ▣ASN.1 Network Management 9-3

Network Management 9-3 Chapter 9 outline  What is network management?  Internet-standard management framework  Structure of Management Information: SMI  Management Information Base: MIB  SNMP Protocol Operations and Transport Mappings  Security and Administration  ASN.1

What is network management? ☒无法显示该图片 autonomous systems(aka "network"):100s or 1000s of interacting hardware/software components other complex systems requiring monitoring,control: o jet airplane o nuclear power plant o others? "Network management includes the deployment,integration and coordination of the hardware,software,and human elements to monitor,test,poll,configure,analyze,evaluate, and control the network and element resources to meet the real-time,operational performance,and Quality of Service requirements at a reasonable cost." Network Management 9-4

Network Management 9-4 What is network management?  autonomous systems (aka “network”): 100s or 1000s of interacting hardware/software components  other complex systems requiring monitoring, control:  jet airplane  nuclear power plant  others? "Network management includes the deployment, integration and coordination of the hardware, software, and human elements to monitor, test, poll, configure, analyze, evaluate, and control the network and element resources to meet the real-time, operational performance, and Quality of Service requirements at a reasonable cost

Infrastructure for network management definitions: managing entity agent data managing managed devices contain data entity managed device managed objects whose data is gathered into a agent data network Management Information management Base(MIB) managed device protocol agent data agent data managed device managed device Network Management 9-5

Network Management 9-5 Infrastructure for network management agent data agent data agent data agent data managed device managed device managed device managed device managing entity data network management protocol definitions: managed devices contain managed objects whose data is gathered into a Management Information Base (MIB) managing entity

Network Management standards OSI CMIP SNMP:Simple Network ▣Common Management Management Protocol Information Protocol ▣Internet roots(SGP) □designed198o's:the started simple unifying net deployed,adopted rapidly management standard growth:size,complexity ▣too slowly ▣currently:SNMP V3 standardized ▣de facto network management standard Network Management 9-6

Network Management 9-6 Network Management standards OSI CMIP  Common Management Information Protocol  designed 1980’s: the unifying net management standard  too slowly standardized SNMP: Simple Network Management Protocol  Internet roots (SGMP)  started simple  deployed, adopted rapidly  growth: size, complexity  currently: SNMP V3  de facto network management standard

Chapter 9 outline What is network management? Internet-standard management framework o Structure of Management Information:SMI o Management Information Base:MIB o SNMP Protocol Operations and Transport Mappings o Security and Administration ▣ASN.1 Network Management 9-7

Network Management 9-7 Chapter 9 outline  What is network management?  Internet-standard management framework  Structure of Management Information: SMI  Management Information Base: MIB  SNMP Protocol Operations and Transport Mappings  Security and Administration  ASN.1

SNMP overview:4 key parts Management information base (MIB): o distributed information store of network management data Structure of Management Information (SMI): o data definition language for MIB objects ▣SNMP protocol o convey managermanaged object info,commands security,administration capabilities omajor addition in SNMPv3 Network Management 9-8

Network Management 9-8 SNMP overview: 4 key parts  Management information base (MIB):  distributed information store of network management data  Structure of Management Information (SMI):  data definition language for MIB objects  SNMP protocol  convey managermanaged object info, commands  security, administration capabilities  major addition in SNMPv3

SMI:data definition language Purpose:syntax,semantics of Basic Data①ypes management data well- defined,unambiguous INTEGER Integer32 base data types: Unsigned32 o straightforward,boring OCTET STRING OBJECT-TYPE OBJECT IDENTIFIED o data type,status, IPaddress semantics of managed Counter32 object Counter64 MODU儿E-IDENTITY Guage32 Time Ticks o groups related ob jects Opaque into MIB module Network Management 9-9

Network Management 9-9 SMI: data definition language Purpose: syntax, semantics of management data well￾defined, unambiguous  base data types:  straightforward, boring  OBJECT-TYPE  data type, status, semantics of managed object  MODULE-IDENTITY  groups related objects into MIB module Basic Data Types INTEGER Integer32 Unsigned32 OCTET STRING OBJECT IDENTIFIED IPaddress Counter32 Counter64 Guage32 Time Ticks Opaque

SNMP MIB MIB module specified via SMI MODULE-IDENTITY (100 standardized MIBs,more vendor-specific) MODULE OBJECT TYPE: OBJECT TYPE OBJECT TYPE: objects specified via SMI OBJECT-TYPE construct Network Management 9-10

Network Management 9-10 SNMP MIB OBJECT TYPE: OBJECT TYPE:OBJECT TYPE: objects specified via SMI OBJECT-TYPE construct MIB module specified via SMI MODULE-IDENTITY (100 standardized MIBs, more vendor-specific) MODULE