Network Design and Management - Lecture Notes

  • ISO Network Management Framework

    • Focuses on managing data networks efficiently.

  • Data Network Definition

    • Collection of devices and circuits for data transfer (e.g. ATMs).
    • Purpose: Resource sharing among users at different locations.

  • Primary Goals of Network Design

    • Address an organization's communication needs.
    • Consider productivity and budget constraints.

  • Key Considerations in Network Design

    • Suitability
    • Reliability
    • Scalability
    • Durability

  • Roles of Network Engineers/Administrators

    • Install, maintain, troubleshoot, optimize, and expand networks.
    • Support network management to handle complexity.

  • Network Management Process

    • Maximizes efficiency and productivity of networks.
    • Categories:
    • Configuration management
    • Security management
    • Performance management
    • Accounting management
    • Fault management

  • Configuration Management

    • Processes include gathering, modifying, and storing network data.
    • Data collection methods: manual and auto-discovery.
    • Storage types: unstructured (easy access but inefficient) vs structured (efficient, requires knowledge of query languages).

  • Security Management

    • Protects sensitive information and access points.
    • Involves identifying, finding, securing, and maintaining vulnerabilities.

  • Performance Management

    • Ensures network accessibility and quality of service (QoS).
    • Steps: data collection, analysis, threshold setting, simulation.

  • Accounting Management

    • Gathers network statistics for resource allocation and billing.
    • Essential tasks include metrics establishment and usage quota settings.

  • Fault Management

    • Involves locating and isolating network issues.
    • Two methods: interrupt-driven and polling.

  • Network Management Systems (NMS)

    • Composed of an architecture and applications for managing network devices.
    • Examples include HP Openview, IBM Netview, and Net-SNMP.
    • Platforms should provide user interfaces, network maps, DBMS, query languages, and event logs.

  • Architectures of NMS

    • Centralized
    • Hierarchical
    • Distributed

  • Next Lecture

    • Topic: Network Mapping and Baselining

  • Instructor: Shashika Lokuliyana

    • Faculty of Computing, SLIIT