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High Availability Network Fundamentals

Book Description

A practical guide to modeling and designing reliable networks

  • Provides a detailed introduction to modeling availability necessary for network design

  • Helps network designers understand the theoretical availability of their topologies

  • Explains the factors that limit availability to minimize the number of network failures

  • Provides all the information necessary to do basic availability modeling/budgeting

  • High Availability Network Fundamentals discusses the need for and the mathematics of availability, then moves on to cover the issues affecting availability, including hardware, software, design strategies, human error, and environmental considerations. After setting up the range of common problems, it then delves into the details of how to design networks for fault tolerance and provides sample calculations for specific systems. Also included is a complete, end-to-end example showing availability calculations for a sample network.

    Table of Contents

    1. Copyright
    2. About the Author
    3. About the Technical Reviewers
    4. Acknowledgments
    5. Introduction
    6. Introduction to Availability
      1. Introduction to High Availability Networking
        1. Why Do We Need High Availability?
        2. Presenting and Describing High Availability Measurements
        3. Additional Considerations in Measuring Availability
      2. The Basic Mathematics of High Availability
        1. Determining the Availability of Network Device Components
        2. Determining the Availability of a Single Component
        3. Determining the Availability of Multiple Components
        4. Determining Data Flow in a Network: Path Analysis
      3. Network Topology Fundamentals
        1. Serial Topology
        2. Parallel Topology
        3. Serial/Parallel Topology
        4. Summary
    7. Predicting Availability
      1. Factors That Affect Availability
        1. Predicting Hardware Availability
        2. Predicting Software Availability
        3. Predicting Availability Considering the Environment
        4. Including Human Error and Process in Availability Calculations
        5. Network Design
        6. Summary
        7. References Used in This Chapter
      2. Predicting End-to-End Network Availability: The Divide-and-Conquer Method
        1. The Divide-and-Conquer Steps
        2. A VoIP Network Example
        3. Designing Networks for Availability Goals
        4. Summary
    8. Examples of Analyzing Real-World Availability
      1. Three Cisco Products: An Availability Analysis
        1. Cisco uBR 924 Availability Calculations
        2. Cisco uBR 7246 Availability Calculations
        3. Cisco 12000 Availability Calculations
      2. A Small ISP Network: An Availability Analysis
        1. The Small Internet Service Provider Network
        2. Scenario 1 of The Small ISP Example
        3. Scenario 2 of The Small ISP Example
        4. Summary
      3. An Enterprise Network: An Availability Analysis
        1. System Level Calculations for an Enterprise Network
        2. The Downtime from Lost Power for an Enterprise Network
        3. Network Calculations for an Enterprise Network
        4. Human Error and Process Contribution to Downtime in an Enterprise Network
        5. Summary
      4. A Large VoIP Network: An Availability Analysis
        1. A VoIP over Cable Network
        2. The Availability Scenarios of VoIP over HFC
        3. The System Level Calculations for VoIP over HFC
        4. Network Level Availability Calculations
        5. Major Network Service Construct Availability
        6. Calculating Scenario Availability
        7. Summary
    9. The Contents of the CD
      1. Computer Requirements
      2. Basic Instructions for Using the CD
      3. Chapter by Chapter Contents
      4. Using the SHARC Spreadsheet
    10. Index