Advanced Network Management

1. 1 Advanced Network Management Instructor Dr. Dssouli Acknowledgement Thanks to Dr. Chadi Assi who develepped this course

2. 2 Text Books and References

3. 3 Course Outline Network Management: Principles, Standards and Models. Computer Networks and the Internet Application, Transport and Network layer Network Management Protocols and Abstract Syntax Notation One (ASN.1). Simple Network Management Protocol (SNMP) Structure of Management Information (SMI), Management Information Base (MIB). SNMPv2 SNMPv3 Remote Monitoring (RMON), RMON 1 and 2.

4. 4 Course Outline OSI Systems management, Telecommunications Management Network (TMN), and ATM Network Management. . Network Management Applications (Configuration, Performance, Fault and Security management). Distributed Management Framework (management by delegation, mobile agent based management, etc.) CORBA based management, web based management, JMX and DMTF.

5. 5 Course Outline Marking Scheme: Midterm1 ������� 35% Midterm2 ������� 35% Project/Report����������� 30% More info:http://users.encs.concordia.ca/~dssouli/INSE-7120.html

6. 6 Background Today�s �Information Infrastructure� (or simply the Internet) is increasingly growing large number of interconnected heterogeneous sub-networks and a wide range of distributed applications (100s or 1000s of interacting hardware/software components) Other complex systems requiring monitoring, control jet airplane nuclear power plant Others In such a large network, many things can go wrong therefore disabling the network or a portion of it and degrading performance to an unacceptable level!

7. 7 Background During the old days, a network can be managed by using only human efforts! In a small system, running few �pings� may help locating the problem As the Internet becomes a large global infrastructure, automated network management tools are essential Standardized tools that can be used across a broad spectrum of product types are also needed Therefore, a network management system (NMS) is a collection of tools for network monitoring and control Just as an airplane cockpit allows a pilot to monitor, control, analyze, configure, etc.

8. 8 Network Management

9. 9 Network Management

10. 10 Network Management

11. 11 "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." What is Network Management?*

12. More recent Definition �Network Management refers to the activities, methods, procedures and tools pertaining to the operation, administration, maintenance and provisioning of networked systems� Alex Clemm: Network Management Fundamentals, Cisco Press, 2006 12

13. What are the managed systems? It can be Network or Network of networks Equipment and Devices End systems such as distributed systems or applications (often called distributed systems management) Services ( service provider), known as service management 13

14. What a general management system does? Observe facts (collect data, measure parameters...) Analyze data collected and behaviour Act on the managed system to obtain results 14

15. 15 What is Network Management? ISO (International Organization for Standardization) has created a network management model. 5 areas of network management are classified Performance Management Fault Management Configuration Management Security Management Accounting Management This classification has gained broad acceptance by vendors of both standardized and proprietary NMS

16. 16 Performance Management Goal: Quantify, measure, report, analyze, and control the performance of different network components (such as routers, hosts, as well as end to end abstractions, such as a path through the network)

17. 17 Fault Management Goal: Log, detect, and respond to fault conditions in the network Immediate* handling of transient network failures (link, host, router hardware or software outages)

18. 18 A client application exchanges data over a TCP connection with a DB server Distinct domains each administered by a different organization

19. 19 Problem scenario A clock at an interface in WAN2 that supports T3 link loses SYNC 4 times a second for 0.25 ms ? intermittent noise causing loss of 0.1% of T3 capacity ? this small noise causes bit errors in a large number of packets routed over C-D ? Bit errors cause packet losses, either at routers (if IP header corrupted) or at destinations

20. 20 ? performance of TCP connection degrades due to packet loss ? TCP sender interprets this as congestion and hence reduces its window TCP increases its window gradually until new packet loss However due to the noise, the TCP window will not increase DB transactions by client will last longer DB server performance will degrade due to records lock-out, causing frequent aborts for remote transactions

21. 21 Configuration Management Goal: Allow a network manager to track which devices are on the network and the hardware and software configurations of these devices.

22. 22 Security Management Goal: Control access to network resources according to well defined policy. Identifying sensitive information (e.g., network management information) and protecting it

23. 23 Accounting Management Goal: Specify, log, and control user and device access to network resources �usage quotas, usage-based charging, the allocation of resource-access privileges� �Accounting reports should be generated periodically

24. 24 Infrastructure for Network Management