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Networking Management Concepts

Networking Management Concepts. BAI 615 - Network Management. Objectives. Understand the basic principles and practices involved in managing modern networks Explain the role that the Simple Network Management Protocol can have on an IP-based network

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Networking Management Concepts

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  1. Networking Management Concepts BAI 615 - Network Management

  2. Objectives • Understand the basic principles and practices involved in managing modern networks • Explain the role that the Simple Network Management Protocol can have on an IP-based network • Distinguish between in-band and out-of-band network management tools and techniques • Understand the basic structure and function SNMP management data, including Management Information Bases

  3. What is Network Management • Means different things to different people • Art and Science of determining the health and status of network equipment such as switches, routers, hubs, and other communications equipment composing network infrastructure

  4. SNMP (1/6) • Simple Network Management Protocol • Predecessor was SGMP (Simple Gateway Management Protocol) • Developed to manage Internet routers • Can manage many type of devices • Workstations • UPS • Switches • Routers • Printers • Etc.

  5. SNMP (2/6) • Request & Response based protocol • SNMP Versions • SNMPv1 • SNMPv2 • SNMPv3

  6. SNMP (3/6) • Basic Elements • Management Information Base • To be covered later • SNMP Agents • SNMP Managers • SNMP Messages

  7. SNMP (4/6) • SNMP Agents • Agent software placed on devices that can be managed by SNMP managers • Agent software contains the MIB for the device • Agent answers to the SNMP Managers queries for information about the objects in the agent’s MIB

  8. SNMP (5/6) • SNMP Managers • Network Management System • Query SNMP agents for the information maintained about the device’s MIB objects • Set thresholds on the SNMP agents

  9. SNMP (6/6) • Managers and Agents communicate with a specific set of commands • Get-Request • Get-Response • Get-Next • Set • Trap*Covered more later

  10. Network Management Functions (1/6) • Five functional areas of network management as defined by ISO - Fault management - Configuration management - Accounting management - Performance management - Security management

  11. Network Management Functions (2/6) • Fault Management • Detect, log, notify • Resolve the fault • Isolate the problem • Resolve the problem • Record the process

  12. Network Management Functions (3/6) • Configuration Management • Monitor network and system configuration • OS version • Number and speed of NICs • Number of HDs • Number of CPUs • Amount of RAM • Etc.

  13. Network Management Functions (4/6) • Accounting Management • Ensure resources are used fairly by all groups or individuals

  14. Network Management Functions (5/6) • Performance Management • Measure and report network & system performance • Performance data is gathered • Baseline is established • Thresholds are established

  15. Network Management Functions (6/6) • Security Management • Control access to resources • Detect and prevent attacks • Tools • Firewalls • IDS • IPS • Antivirus • Policy management

  16. Applying Concepts of NM (1/3) • Business Case Requirements • Solving a business problem through an implementation of some sort. • Develop a business case to understand the impact of implementing some task or function

  17. Applying Concepts of NM (2/3) • Levels of Activity • Inactive • No monitoring is done • Ignore alarms • Reactive • No monitoring is done • React to alarms if they occur

  18. Applying Concepts of NM (3/3) • Levels of Activity (cont.) • Interactive • Monitor components • Troubleshoot interactively • Eliminate side-effect alarms • Isolate root cause • Proactive • Monitor components • System provides root cause • System initiates predefined restoral process

  19. Applying Concepts of NM (4/6) • Reporting of Trend Analysis • Identify when systems, services, or networks are beginning to reach maximum capacity • Response Time Reporting • Measures how various aspects of a network are performing with respect to responsiveness

  20. Applying Concepts of NM (5/6) • Alarm Correlation • Narrowing down many alerts and events into a single alert or event that depict the real problem • Trouble Resolution • Knowing how to interpret alarms • Don’t dismiss seemingly mundane alarms

  21. Network Management Process • Plan/Design • Implement/Deploy • Operate/Maintain

  22. Understanding Network Management Practices and Principles • The tasks involved in managing a network depend on the ability to collect data about a network and detect network-related occurrences, usually called events • This means being able to monitor and control all of the devices that go into a modern network, from hubs and routers, to server, switches, and gateways of various kinds • To some extent, network management is a term that’s open to multiple interpretations

  23. Challenges of Network Management • Networks are constantly changing • Increased complexity • How are network managers to keep up with the frequent adds, moves, and changes within their network?

  24. Management Requirements • A physical and logical layout of network devices that pinpoint port connectivity • A way to maintain user connections, experience, and knowledge during change • Reports • An active and up-to-date device database • An easy way to implement global configuration changes to network devices

  25. Benefits of Network Management • Reduces: - Internal administrative costs - Network downtime - Capital equipment costs - Limits access to network data

  26. OSI Network Management Model • ISO/OSI network management model defines a common frame of reference for network management, and provides an excellent framework for understanding the major functions that NMSs perform • The OSI network management model incorporates the following five layers: • Accounting management • Configuration management • Fault management • Performance management • Security management

  27. Practical Network Management • When it comes to performing the tasks associated with managing a network, and the devices and resources which it comprises, the OSI network management model does an excellent job of categorizing and cataloging the tasks and activities involved • Unfortunately, the frequency of appearance of full-fledged NMSs on most modern networks falls somewhere between “seldom” and “never”

  28. Practical Network Management • Much of modern network management consists of using the OSI network management model as an ideal against which to manage one’s networks and devices, with whatever management tools are available • The important thing is to make systematic network management a priority, and obtain the right mix of software components and tools that can be used as part of a program of regular, scheduled network maintenance and care

  29. Network Management Features • A centralized method of organizing, operating and troubleshooting networks • Includes components which create a network-enabled management model • The NM components are - Management Information Base (MIB) - Simple Network Management Protocol

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