1 / 18

Telecommunications Management 273-436/635

Telecommunications Management 273-436/635. Network Management. Need for Network Management. Networks and distributed systems are becoming pervasive Networks and distributed applications are critical to organizational performance

teenie
Download Presentation

Telecommunications Management 273-436/635

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Telecommunications Management273-436/635 Network Management

  2. Need for Network Management • Networks and distributed systems are becoming pervasive • Networks and distributed applications are critical to organizational performance • More things can go wrong in a network environment to disable the network or downgrade performance • Human effort alone is not sufficient to manage complex networks • Automated network management tools are essential Grant

  3. Key areas of Network Management (OSI) • Fault management • Accounting management • Configuration and name management • Performance management • Security management Grant

  4. Fault management The facilities that enable the detection, isolation, and correction of abnormal operation of the OSI environment • Fault: an abnormal condition tha t requires management attention to repair • When faults occur: • Determine where the fault is • Isolate rest of the network from the failure so it can continue functioning without interruption • Reconfigure or modify network • Repair or replace failed components Grant

  5. Fault management • User Requirements • Fast and reliable problem resolution • Immediate notification that a problem has occurred • Information on network status and scheduled and unscheduled service disruptions • Entails: • Proactive, rapid and reliable fault detection and diagnosis • Redundant capacity to provide alternatives • Problem tracking and control Grant

  6. Accounting management • Tracking network use for • cost accounting • abuse of access privileges • Network use efficiency • Planning network growth • User requirements • specifying the kinds of information to be recorded at each node and when they should be sent to higher-level management nodes • Specifying the algorithms to be used in calculating charges • Determining and monitoring access privileges to accounting information Grant

  7. Configuration and name management • Concerned with • initializing a network and gracefully shutting down all or part of it. • maintaining, adding, updating the relationships among components • User requirements • automated startup or shutdown of network operations • identification of network components and desired connectivity level • Ability to change and reconfigure networks in response to new needs and performance evaluation Grant

  8. Performance management • Network communications need to take place within certain performance limits • Performance management: • Monitoring • Controlling • Performance issues • Level of capacity utilization • Nature of network traffic: excessive or not • Level of throughput • Existence of bottlenecks • Response time Grant

  9. Performance management • User requirements • Network performance history (response times and reliability • Network performance statistics to assist in planning, managing and maintaining large networks • Statistics help managers to: • recognize potential bottlenecks • take corrective action such as changing routing tables to balance or redistribute traffic load Grant

  10. Security management • Concerned with • Generating, distributing, and storing encryption keys • Maintaining and distributing password and access control information • Monitoring and controlling access to computer networks • Collecting, storing, examining audit records and security logs • User requirements • Security of information • Security and integrity of network facilities Grant

  11. Network management systems • An integrated collection of tools for network monitoring and control, which contains a • Single, user-friendly operator interface • Minimal amount of separate equipment • Consists of incremental hardware and software implemented on existing network components • Software resides on host computer • Views the entire network as a unified architecture Grant

  12. Network management entity (NME) • Software at each node that perform network management tasks • Tasks performed include • Collection of statistics on communications and network-related activities • Local storage of statistics • Response to commands from the network control center • Sending messages to the network control center when local conditions change significantly Grant

  13. Network management application (NMA) • Collection of software that controls network management activity throughout the network • Includes an operator interface to allow an authorized user to manage the network • Responds to user commands and issues commands to NMEs throughout the network • Uses the same communication architecture as other distributed applications Grant

  14. Agents • End systems that support user applications • host computers • servers • workstations • Nodes that provide a communications service • front-end processors • cluster controllers • bridges • routers Grant

  15. SNA network management architecture • Problem management • problem determination, problem diagnosis, problem bypass and recovery, problem resolution, problem tracking and control • Performance and accounting management • response-time monitoring, availability monitoring, utilization monitoring, component delay monitoring, performance tuning, performance tracking and control, accounting Grant

  16. SNA network management architecture • Configuration management • physical/logical resource identification, resource relationship identification • Change management • software change control, microcode change control, hardware change control Grant

  17. Technical control • Availability - most important characteristic of a network and its services • Increasing reliance on networks make downtime costly • Network technical control involves • Automatic and remote systems testing and monitoring to reduce downtime • Restoring and reconfiguring the system when it fails • Providing network performance and functioning statistics to facilitate Grant

  18. Technical control approaches • Component-level technical control • monitors network activity at the point of attachment of host systems to the network • Line monitors • digital • analog • Protocol analyzers Grant

More Related