《计算机网络 Computer Networking》课程教学课件（A Top Down Approach，6th edition）Chapter 9 Network Management

Computer Networking A Top-Down Approach Chapter 9 Network Management KUROSE ROSS A note on the use of these ppt slides: Computer We're making these slides freely available to all(faculty,students,readers). They're in PowerPoint form so you see the animations;and can add,modify, Networking:A 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 Top Down ask the following: If you use these slides(e.g.,in a class)that you mention their source Approach (after all,we'd like people to use our book!) 6th edition If you post any slides on a www site,that you note that they are adapted from (or perhaps identical to)our slides,and note our copyright of this Jim Kurose,Keith Ross material. Addison-Wesley Thanks and enjoy!JFK/KWR March 2012 t Reserved Network Management 9-1

Chapter 9 Network Management Computer Networking: A Top Down Approach 6th edition Jim Kurose, Keith Ross Addison-Wesley March 2012 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 see the animations; and 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) that you mention their source (after all, we’d like people to use our book!)  If you post any slides 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 1996-2012 J.F Kurose and K.W. Ross, All Rights Reserved Network Management 9-1

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 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 -Structure of Management Information:SMI Management Information Base:MIB SNMP Protocol Operations and Transport Mappings 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? autonomous systems(aka "network"):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." Network Management 9-4

Network Management 9-4 What is network management?  autonomous systems (aka “network”): 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 managed devices managing contain entity data managed device managed objects agent data whose network data is gathered into management agent data managed device protocol a m Management Information agent data agent data Base(MIB) managed device managed device Network Management 9-5

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

Network management standards OSI CMIP SNMP:Simple Network Common Management Protocol Management Internet roots (SGMP) Information Protocol started simple designed 1980's: deployed,adopted the unifying net rapidly management growth:size,complexity standard currently:SNMP V3 *too slowly 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 Structure of Management Information:SMI Management Information Base:MIB SNMP Protocol Operations and Transport Mappings Security and Administration ASN.1 Network Management 9-7

Network Management 9-7  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 Chapter 9 outline

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

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 TY 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