Presentation is loading. Please wait.

Presentation is loading. Please wait.

EEE 582 Telecom Network management Introduction Instructors: Vikas Singh.

Similar presentations


Presentation on theme: "EEE 582 Telecom Network management Introduction Instructors: Vikas Singh."— Presentation transcript:

1

2 EEE 582 Telecom Network management Introduction Instructors: Vikas Singh

3 Scope and Objective Scope and Objective of the course The course covers –management principles, –practices and technologies for managing telecommunication and computer communication networks and services. –Discuss both theoretical and practical aspects of network management. –SNMP-based protocols –TMN standards. –Network monitoring tools and systems. –RMON –web-based management. –Assignments 2 Vikas Singh, CSIS Dept. BITS Pilani

4 Text books and Reference Text book –Mani Subramanian, Network Management: Principles and Practice, Addison-Wesley, Reference Books –Sallings, W., SNMP, SNMPv2, SNMPv3, and RMON 1 and 2, Reading, MA: Addison-Wesley, –Divakara K. Udupa, TMN Telecommunications Management Network, McGraw-Hill Professional Pub., Vikas Singh, CSIS Dept. BITS Pilani

5 Course Plan Contd… 4 Vikas Singh, CSIS Dept. BITS Pilani

6 Evaluation Scheme ComponentDurationWeight Test I50 minutes.20% Test II50 minutes.20% Assignments (Problem solving, reading assignments and Lab work) Regular20% Compre3 Hrs.40% 5 Vikas Singh, CSIS Dept. BITS Pilani

7 Chapter 1 Data Communications and NM Overview 6 Vikas Singh, CSIS Dept. BITS Pilani

8 Question What is a network? What is Network Management? Why do we need Network Management? What is the goal of network management? 7 Vikas Singh, CSIS Dept. BITS Pilani

9 Network Management What is it? People and processes that coordinate and plan Tools that assist in Reporting, Trouble shooting, and Performance Analysis Applications that support a Network Services Group in getting its job done Why Network management? To keep network up and running Identify problems before they take the network down. Minimize system downtime, thus increasing productivity 8 Vikas Singh, CSIS Dept. BITS Pilani

10 Goal of network Management Goal of an NMS system is to ensure that the users of network receive the services with the quality of service they expect –With minimum service interruptions 9 Vikas Singh, CSIS Dept. BITS Pilani

11 Why use standards? Without standards, Network Management Systems from different vendors would not be able to work together without additional effort and integration One is locked to a single vendor Allows interoperability of Network Management Systems from different vendors of different network elements Not restricted to single vendor for compatibility and interoperability 10 Vikas Singh, CSIS Dept. BITS Pilani

12 Outline Chapter 1 Analogy of telephone network (section 1.1) Data and telecommunication network (1.2) Distributed computing environment (1.3) Internet and TCP/IP based Networks (1.4) Protocols and standards (1.5) IT management(1.7) Network management Goals, organization and Functions (1.8) Network and system management (1.9) Current status and future of network management Vikas Singh, CSIS Dept. BITS Pilani

13 Telephone Network Chapter 1 Characteristics: Reliable - does what is expected of it Dependable - always there when you need it Good quality (connection) - hearing each other well Reasons: Good planning, design, and implementation Good operation and management of network 12 Vikas Singh, CSIS Dept. BITS Pilani

14 Notice the hierarchy of switches Primary and secondary routes programmed Automatic routing Where is the most likely failure? Use of Operations Systems to ensure QoS Telephone Network Model (1.1) 13 Vikas Singh, CSIS Dept. BITS Pilani

15 Operations Systems / NOC Monitor telephone network parameters S/N ratio, transmission loss, call blockage, etc. Real-time management of network Trunk (logical entity between switches) maintenance system measures loss and S/N. Trunks not meeting QoS are removed before customer notices poor quality Traffic measurement systems measure call blockage. Additional switch planned to keep the call blockage below acceptable level Operations systems are distributed at central offices Network management done centrally from Network Operations Center (NOC) 14 Vikas Singh, CSIS Dept. BITS Pilani

16 Information Transmission May be transmitted as: –Circuit switched mode –Message switched mode –Packet switched mode 15 Vikas Singh, CSIS Dept. BITS Pilani

17 Communication Network Network Communications Tele-communication network Typically Circuit switched Used for voice telecommunication Also provide other services such as high speed dedicated transmission Such as E1 in India and higher Data Communication network Typically Packet switched Used for data transmission May provide connection less or connection oriented services May also provide VOIP 16 Vikas Singh, CSIS Dept. BITS Pilani

18 Data and Telecommunication Network (1.2) Computer data is carried over long distance by telephone (telecommunication network) Output of telephone is analog and output of Computers is digital Modem is used to “modulate” and “demodulate” computer data to analog format and back Clear distinction between the two networks is getting fuzzier with modern multimedia networks PSTN 17 Vikas Singh, CSIS Dept. BITS Pilani

19 IBM SNA Architecture IBM System Network Architecture (SNA) is a major step in network architecture SNA is based on multitude of (dumb) terminals accessing a mainframe host at a remote location SNA architecture is a centralized architecture, and not used any more 18 Vikas Singh, CSIS Dept. BITS Pilani

20 19 Vikas Singh, CSIS Dept. BITS Pilani

21 DCE with LAN (section 1.3) DCE.. Distributed Computing Environment Driving technologies for DCE: Desktop processor LAN LAN - WAN network Questions: Why we need a LAN? What are the advantages of a LAN network What are the different networks you are familiar with? Inter-LAN connectivity ? 20 Vikas Singh, CSIS Dept. BITS Pilani

22 Notes Major impacts of DCE: No more monopolistic service provider No centralized IT controller Hosts doing specialized function Client/Server architecture formed the core of DCE network LAN-WAN Network 21 Vikas Singh, CSIS Dept. BITS Pilani

23 Post office analogy; clerk the server, and the customer the client Client always initiates requests Server always responds Notice that control is handed over to the receiving entity. What other analogies can you think of ? Request Response Client/Server Model 22 Vikas Singh, CSIS Dept. BITS Pilani

24 Client/Server Examples 23 Vikas Singh, CSIS Dept. BITS Pilani

25 Internet and Protocols What is Internet –A network of networks –Public networks peering with each other and interconnected with each other –Each Network operating independently –A distributed Network –Uses packet switching –Based on TCP/IP protocols –Uses connection less network protocol for routing –Common applications: HTTP (Web browser), SMTP (Simple mail transfer protocol) and FTP 24 Vikas Singh, CSIS Dept. BITS Pilani

26 Internet Architecture FTP SMTP TELNET HTTP TCP UDP IP ICMP ARP & RARP Ethernet X.25PPPPMPP Application Transport Network Link Level SNMP Others Voice Over IP 25 Vikas Singh, CSIS Dept. BITS Pilani

27 Internet Protocol Layers APPLICATION PRESENTATION SESSION TRANSPORT NET INTER INTRA DATA LINK PHYSICAL APPLICATION FTP,SMTP, Telnet, HTTP, SNMP TCP: Transport IP: Internet Protocol IEEE 802 X.25 HARDWARE TCP/IP AND OSI: Functional Positioning of Layers ISO/OSI Layered Model for data communications TCP/IP Model for data communications 26 Vikas Singh, CSIS Dept. BITS Pilani

28 TCP/IP Based Networks TCP/IP is a suite of protocols Internet is based on TCP/IP IP is Internet protocol at the network layer level TCP is connection-oriented transport protocol and ensures end-to-end connection UDP is connectionless transport protocol and provides datagram service Internet and much of the network mgmt. messages are based on UDP/IP ICMP part of TCP/IP suite. An example of SNMP is application layer protocol 27 Vikas Singh, CSIS Dept. BITS Pilani

29 Internet Configuration Private TCP/IP Network Also called Intranet Private TCP/IP Network Also called Intranet 28 Vikas Singh, CSIS Dept. BITS Pilani

30 Internet Configuration Domain Name server LAN B LAN A Mail Server B/R LAN C Gateway1 Internet Gateway LAN abc B/R LAN x Mail Server Asha’s Workstation Anand’s workstation Asha’s Intranet Domain name: bits-pilani.ac.in Internet consists of multiple domains 29 Vikas Singh, CSIS Dept. BITS Pilani

31 Notes Gateway: The Intranet or local network may have a different set of protocols running as compared to Internet. As an example the client network might be using Novell LAN, which uses XNS protocol. Gateway 1 will provide protocol translation from XNS to TCP/IP 30 Vikas Singh, CSIS Dept. BITS Pilani

32 Autonomous Systems Internet Routing Architecture R R R R R Autonomous System A Stub AS Autonomous System B R R R Autonomous System C R R R R Autonomous System D Multi-homed AS R Border Router: also called gateway router R Interior Router (Transit AS for AS B) R R R R R R R R R R R R 31 Vikas Singh, CSIS Dept. BITS Pilani

33 Architecture, Protocols and Standards Communication architecture Modeling of communication systems, comprising functional components and relationship between those components Defined by operations interfaces between them Communication protocols Operational procedures intra- and inter-modules Communication standards Agreement between manufacturers on protocols of communication equipment on physical characteristics and operational procedures Questions: Examples of protocols? Why do we need Protocols? Why do we need standards? 32 Vikas Singh, CSIS Dept. BITS Pilani

34 Communication Architecture Inter-layer interface: user and service provider Peer-layer protocol interface Analogy of hearing-impaired student (protocol conversion) Role of intermediate systems Gateway: Router with protocol conversion as gateway to an autonomous network or subnet 33 Vikas Singh, CSIS Dept. BITS Pilani

35 Importance of the knowledge of layer structure in NM OSI Reference Model 34 Vikas Singh, CSIS Dept. BITS Pilani

36 OSI Layers and Services 35 Vikas Singh, CSIS Dept. BITS Pilani

37 PDU Communication Model What is the relevance of PDU model in NM? 36 Vikas Singh, CSIS Dept. BITS Pilani

38 cc:mail from a station in Novel IPX network to an Internet station with SMTP Gateway Communications to a Proprietary Subnet 37 Vikas Singh, CSIS Dept. BITS Pilani

39 SNA, OSI, and Internet Similarity between SNA and OSI Simplicity of Internet; specifies only layers 3 and 4 Integrated application layers over Internet Commonality of layers 1 and 2 - IEEE standard Vikas Singh, CSIS Dept. BITS Pilani

40 Application Protocols Internet user OSI user TelnetVirtual Terminal File Transfer ProtocolFile Transfer Access & Mgmt Simple Mail TransferMessage-oriented Text Protocol Interchange Standard Simple NetworkCommon Management Management Protocol Information Protocol 39 Vikas Singh, CSIS Dept. BITS Pilani

41 NM Case Histories The case of the Footprint (topology) Case of the crashing bridge 40 Vikas Singh, CSIS Dept. BITS Pilani

42 Common Network Problems Loss of connectivity Duplicate IP address (address management) Intermittent problems Network configuration issues Non-problems Performance problems 41 Vikas Singh, CSIS Dept. BITS Pilani

43 Challenges of IT Managers Reliability Non-real time problems Rapid technological advance Managing client/server environment Scalability Troubleshooting tools and systems Trouble prediction Standardization of operations - NMS helps Centralized management vs “sneaker-net” 42 Vikas Singh, CSIS Dept. BITS Pilani

44 Network Management System Functionality OAM&P – Operations – Administration – Maintenance – Provisioning 43 Vikas Singh, CSIS Dept. BITS Pilani

45 Network Management 44 Vikas Singh, CSIS Dept. BITS Pilani

46 NM Functional Flow Chart Vikas Singh, CSIS Dept. BITS Pilani

47 Network and system management System management: Includes the management of entire system, including the applications –If a user can not access a web page or can not send his/her , it does not matter to him where the problem is. The problem may be with the user’s client, server etc. Or the problem may be in TCP/IP protocol. Network management: problems in lower layers of the TCP/IP, ISO/OSI architecture. Generally problems with network resources such as hub/switches/routers, or connectivity problems –Usually each NE vendor has its own network management system The network management system monitors all the network components, not only a given NE. Some examples are HP Ovenview, IBM Netview, Spectrum, Ciscoworks. The trend is to integrate System and network management systems. 46 Vikas Singh, CSIS Dept. BITS Pilani

48 Network Management architecture (functional) The common management messages consist of management information data (such as the type, id, and status of managed objects..) Vendor AVendor B Common management messages 1. The common messages: management and information data Exchange of monitoring data 2. Management controls 47 Vikas Singh, CSIS Dept. BITS Pilani

49 Services and protocols Vendor A objects Vendor B objects Application Services Management Protocol Transport Protocols Application services: management related applications, such as configuration management, fault management Management protocols are SNMP and CMIP - CMIP is complex and not used very much 48 Vikas Singh, CSIS Dept. BITS Pilani

50 NM Components NMS: Manages multiple network elements, via Network agents. Each Network element could have multiple objects. Note the Hierarchy Same Domain 49 Vikas Singh, CSIS Dept. BITS Pilani

51 Interoperability Message exchange between NMSs managing different domains Two cooperating domains provide some services which are joint. The Communication between the 2 NMSs, allows NMS of Domain A/B, to integrate the Management information from the other domain Domain A Domain B 50 Vikas Singh, CSIS Dept. BITS Pilani

52 Network management protocols CMIP (Common Management Information Protocol) for OSI model SNMP (Simple Network Management Protocol) for TCP/IP (internet) TMN (Telecommunication Management Network) standard for managing telecommunication networks. Issues for managing telecom network are little different, than TCP/IP network, so ITU has come up with TMN framework and architecture 51 Vikas Singh, CSIS Dept. BITS Pilani

53 Status and Future Trends Status: SNMP management Limited CMIP management Operations systems Polled systems Future trends: Service and policy management Business management Web-based management 52 Vikas Singh, CSIS Dept. BITS Pilani

54 Appendix Internet History

55 –Internet is a result of research funded by Defense Advanced Reassert Projects Agency (DARPA) in the late sixties –This research was directed towards connecting different types of computers with different interfaces and over different physical links –This technology includes a set of network standards, a set of procedures/conventions for interconnecting networks and routing traffic among them –Initially, this technology was used for computer communications between research oriented US Federal Government departments, and research institutes –Now, this technology is commercially used everywhere in the world, and thousands of ISPs around the world provide Internet service –Internet in technical terms is a collection of networks that are interconnected by Routers/Gateways 54 Vikas Singh, CSIS Dept. BITS Pilani

56 Internet History 1962: RAND Paul Baran, of the RAND Corporation (a government agency), was commissioned by the U.S. Air Force to do a study on how it could maintain its command and control over its missiles and bombers, after a nuclear attack. His final proposal was a packet switched network. 1968: ARPA awarded the ARPANET contract to BBN. BBN had selected a Honeywell minicomputer as the base on which they would build the switch –Backbones: 50Kbps ARPANET - Hosts: : he first program was created by Ray Tomlinson of BBN. The Advanced Research Projects Agency (ARPA) was renamed The Defense Advanced Research Projects Agency (or DARPA) –Backbones: 50Kbps ARPANET - Hosts: 23 –ARPANET was currently using the Network Control Protocol or NCP to transfer data.This allowed communications between hosts running on the same network. 1973: Development began on the protocol later to be called TCP/IP, it was developed by a group headed by Vinton Cerf from Stanford and Bob Kahn from DARPA. This new protocol was to allow diverse computer networks to interconnect and communicate with each other. –Backbones: 50Kbps ARPANET - Hosts: : First Use of term Internet by Vint Cerf and Bob Kahn in paper on Transmission Control Protocol. –Backbones: 50Kbps ARPANET - Hosts: Vikas Singh, CSIS Dept. BITS Pilani

57 Internet History (Cont’d) 1983: Internet Activities Board (IAB) was created in On January 1st, every machine connected to ARPANET had to use TCP/IP. TCP/IP became the core Internet protocol and replaced NCP entirely. –The University of Wisconsin created Domain Name System (DNS) –Backbones: 50Kbps ARPANET, 56Kbps CSNET, plus satellite and radio connections - Hosts: : Arpanet divided into MILNET and ARPANET. Upgrade to CSNET was contracted to MCI. New circuits would be T1. IBM would provide advanced routers and Merit would manage the network. New network was to be called NSFNET (National Science Foundation Network), and old lines were to remain called CSNET. –Backbones: 50Kbps ARPANET, 56Kbps CSNET, plus satellite and radio connections - Hosts: : The National Science Foundation began deploying its new T1 lines, which would be finished by –Backbones: 50Kbps ARPANET, 56Kbps CSNET, 1.544Mbps (T1) NSFNET, plus satellite and radio connections - Hosts: :The Internet Engineering Task Force or IETF was created to serve as a forum for technical coordination by contractors for DARPA working on ARPANET, US Defense Data Network (DDN), and the Internet core gateway system. –Backbones: 50Kbps ARPANET, 56Kbps CSNET, 1.544Mbps (T1) NSFNET, plus satellite and radio connections - Hosts: Vikas Singh, CSIS Dept. BITS Pilani

58 Internet History (Cont’d) 1987: BITNET and CSNET merged to form the Corporation for Research and Educational Networking (CREN), another work of the National Science Foundation. –Backbones: 50Kbps ARPANET, 56Kbps CSNET, 1.544Mbps (T1) NSFNET, plus satellite and radio connections - Hosts: 28, : Plans to upgrade the network –Backbones: 50Kbps ARPANET, 56Kbps CSNET, 1.544Mbps (T1) NSFNET, plus satellite and radio connections - Hosts: 56, : Merit, IBM and MCI formed a not for profit corporation called ANS, Advanced Network & Services, which was to conduct research into high speed networking. – It soon came up with the concept of the T3, a 45 Mbps line. NSF quickly adopted the new network and by the end of 1991 all of its sites were connected by this new backbone. While the T3 lines were being constructed, the Department of Defense disbanded the ARPANET and it was replaced by the NSFNET backbone. The original 50Kbs lines of ARPANET were taken out of service. Tim Berners-Lee and CERN in Geneva implements a hypertext system to provide efficient information access to the members of the international high- energy physics community. –Backbones: 56Kbps CSNET, 1.544Mbps (T1) NSFNET, plus satellite and radio connections - Hosts: 313, Vikas Singh, CSIS Dept. BITS Pilani

59 Internet History (Cont’d) 1991: CSN discontinued: The operational costs of CREN are fully met through dues paid by its member organizations. –The NSF established a new network, the National Research and Education Network (NREN). The purpose of this network is to conduct high speed networking research. It was not to be used as a commercial network, nor was it to be used to send a lot of the data that the Internet now transfers. –Backbones: Partial 45Mbps (T3) NSFNET, a few private backbones, plus satellite and radio connections - Hosts: 617, : Internet Society is chartered. –World-Wide Web released by CERN. –NSFNET backbone upgraded to T3 (44.736Mbps) –Backbones: 45Mbps (T3) NSFNET, private interconnected backbones consisting mainly of 56Kbps, 1.544Mbps, plus satellite and radio connections - Hosts: 1,136, :InterNIC created by NSF to provide specific Internet services: directory and database services (by AT&T), registration services (by Network Solutions Inc.), and information services (by General Atomics/CERFnet). Marc Andreessen and NCSA and the University of Illinois develops a graphical user interface to the WWW, called "Mosaic for X". –Backbones: 45Mbps (T3) NSFNET, private interconnected backbones consisting mainly of 56Kbps, 1.544Mbps, and 45Mpbs lines, plus satellite and radio connections - Hosts: 2,056, Vikas Singh, CSIS Dept. BITS Pilani

60 Internet History (Cont’d) 1994: No major to the physical network. The most significant thing that happened was the growth. Many new networks were added to the NSF backbone. Hundreds of thousands of new hosts were added to the INTERNET during this time period. –Pizza Hut offers pizza ordering on its Web page. –First Virtual, the first cyber bank, opens. –ATM (Asynchronous Transmission Mode, 145Mbps) backbone is installed on NSFNET. –Backbones: 145Mbps (ATM) NSFNET, private interconnected backbones consisting mainly of 56Kbps, 1.544Mbps, and 45Mpbs lines, plus satellite and radio connections - Hosts: 3,864, : The National Science Foundation announced that as of April 30, 1995 it would no longer allow direct access to the NSF backbone. The National Science Foundation contracted with four companies that would be providers of access to the NSF backbone (Merit). These companies would then sell connections to groups, organizations, and companies. –$50 annual fee is imposed on domains, excluding.edu and.gov domains which are still funded by the National Science Foundation. –Backbones: 145Mbps (ATM) NSFNET (now private), private interconnected backbones consisting mainly of 56Kbps, 1.544Mbps, 45Mpbs, 155Mpbs lines in construction, plus satellite and radio connections - Hosts: 6,642, Vikas Singh, CSIS Dept. BITS Pilani

61 Internet History (Cont’d) 1996: Most Internet traffic is carried by backbones of independent ISPs, including MCI, AT&T, Sprint, UUNet, BBN planet, ANS, and more. Currently the Internet Society, the group that controls the INTERNET, is trying to figure out new TCP/IP to be able to have billions of addresses, rather than the limited system of today. The problem that has arisen is that it is not known how both the old and the new addressing systems will be able to work at the same time during a transition period. Backbones: 145Mbps (ATM) NSFNET (now private), private interconnected backbones consisting mainly of 56Kbps, 1.544Mbps, 45Mpbs, and 155Mpbs lines, plus satellite and radio connections - Hosts: over 15,000,000, and growing rapidly 1996 to 2005: explosive growth, e-commerce, e-gov, e- verything 60 Vikas Singh, CSIS Dept. BITS Pilani

62 A Brief summary of Internet 1968/69 ARPANet With 4 nodes BB Speed 50 Kbps 1972 First program Agency renamed DARPA BB 50Kbps Hosts: 23 On the same network Protocol:NCP Hosts on the same network 1973/74 Development began on TCP/IP. First use of the Term Internet By V. CERF BB 50Kbps Hosts: Dr. Metcalf Developed Ethernet Backbones: 50Kbps ARPANET, plus satellite and radio connections - Hosts: 111+ TCP/IP Experiments USENET Based on UUCP developed by ATT BITnet by IBM: first store and forward network Application: and list serve BB: same as in NSF created CSNet for Connecting Institutions CSNET and ARPAnet Connectivity proposed By Cerf. Backbones: 50Kbps ARPANET, 56Kbps CSNET, plus satellite/ radio Hosts: IAB created Ist Jan: TCP/IP Hosts: ARPAnet divided Milnet and ARPAnet CSNET managed by MCI, and called NSFNet NSFnet backbone Will use T-1 Hosts: IETF created To coordinate The development by various contractors Hosts: Vikas Singh, CSIS Dept. BITS Pilani

63 A Brief summary of Internet 1986 to 1991: Internet Hosts and back bone speeds continued to grow 1992: Tim Berners-Lee and CERN in Geneva implements a hypertext system to provide efficient information access to the members of the international high-energy physics community. –Backbones: 56Kbps CSNET, 1.544Mbps (T1) NSFNET, plus satellite and radio connections - Hosts: 313, :InterNIC created by NSF to provide specific Internet services: directory and database services (by AT&T), registration services (by Network Solutions Inc.), and information services (by General Atomics/CERFnet). Marc Andreessen and NCSA and the University of Illinois develops a graphical user interface to the WWW, called "Mosaic for X". –Backbones: 45Mbps (T3) NSFNET, private interconnected backbones consisting mainly of 56Kbps, 1.544Mbps, and 45Mpbs lines, plus satellite and radio connections - Hosts: 2,056, : Pizza Hut offers pizza ordering on its Web page Hosts: 3,864, : The National Science Foundation announced that as of April 30, 1995 it would no longer allow direct access to the NSF backbone. The National Science Foundation contracted with four companies that would be providers of access to the NSF backbone (Merit). These companies would then sell connections to groups, organizations, and companies. –BB speed from 56 kbps to 155 Mbps –Hosts: 6,642, : Most Internet traffic is carried by backbones of independent ISPs, including MCI, AT&T, Sprint, UUNet, BBN planet, ANS, and more –Hosts: over 15,000,000, and growing rapidly 1996 to 2006: explosive growth, e-commerce, e- gov, e-verything and all countries Lack of address space 62 Vikas Singh, CSIS Dept. BITS Pilani


Download ppt "EEE 582 Telecom Network management Introduction Instructors: Vikas Singh."

Similar presentations


Ads by Google