Network Troubleshooting

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  • Graphic 8.1.1.1
  • Graphic 8.1.2.1
  • Graphic 8.1.3.1
  • Graphics 8.1.4.1
  • Graphic 8.2.1.1
  • Graphic 8.2.2.1
  • Graphic 8.2.3.1
  • Graphic 8.2.4.1
  • Graphic 8.2.5.1
  • Graphics 8.2.6.1 & 8.2.6.2
  • Graphic 8.3.1.1
  • Graphic 8.3.2.1
  • Graphic 8.3.3.1
  • Graphic 8.3.4.1
  • Graphic 8.3.6.1
  • Graphic 8.3.7.1
  • Graphic 8.4.1.1
  • Graphic 8.4.2.3
  • Graphics 8.4.3.3, 8.4.3.4, 8.4.3.5
  • Graphic 8.4.4.2
  • Graphics 8.4.5.1 & 8.4.5.2
  • Graphics 8.4.6.3 & 8.4.6.4
  • Network Troubleshooting

    1. 1. Network Troubleshooting Accessing the WAN – Chapter 8
    2. 2. Objectives <ul><li>Establish a network baseline </li></ul><ul><li>Describe troubleshooting methodologies and troubleshooting tools </li></ul><ul><li>Describe the common issues that occur during WAN implementation </li></ul><ul><li>Troubleshoot enterprise network implementation issues </li></ul>
    3. 3. Establish a Network Baseline <ul><li>Explain the importance of network documentation </li></ul>
    4. 4. Establish a Network Baseline <ul><li>Describe the stages of the network documentation process </li></ul>
    5. 5. Establish a Network Baseline <ul><li>Explain the purpose for measuring normal network performance when creating a baseline </li></ul>
    6. 6. Establish a Network Baseline <ul><li>Describe the steps for establishing a network baseline </li></ul>
    7. 7. Describe Troubleshooting Methodologies and Troubleshooting Tools <ul><li>Explain why a systematic method is the generally the best approach to troubleshooting </li></ul>
    8. 8. Describe Troubleshooting Methodologies and Troubleshooting Tools <ul><li>Describe how layered models, such as the OSI reference model or TCP/IP model, are used for troubleshooting </li></ul>
    9. 9. Describe Troubleshooting Methodologies and Troubleshooting Tools <ul><li>Describe the three stages of the general troubleshooting process </li></ul>
    10. 10. Describe Troubleshooting Methodologies and Troubleshooting Tools <ul><li>Describe the three main methods for troubleshooting network problems </li></ul>
    11. 11. Describe Troubleshooting Methodologies and Troubleshooting Tools <ul><li>Describe the stages for gathering symptoms for troubleshooting a network problem </li></ul>
    12. 12. Describe Troubleshooting Methodologies and Troubleshooting Tools <ul><li>Describe the types of software and hardware tools that are commonly used when troubleshooting networks </li></ul>
    13. 13. Describe the Common Issues that Occur During WAN Implementation <ul><li>Describe the fundamentals in WAN design and communication </li></ul>
    14. 14. Describe the Common Issues that Occur During WAN Implementation <ul><li>Describe the steps for designing or modifying a WAN </li></ul>
    15. 15. Describe the Common Issues that Occur During WAN Implementation <ul><li>Describe the considerations for analyzing WAN traffic </li></ul>
    16. 16. Describe the Common Issues that Occur During WAN Implementation <ul><li>Describe the considerations for designing a WAN topology </li></ul>
    17. 17. Describe the Common Issues that Occur During WAN Implementation <ul><li>Describe common WAN implementation issues </li></ul>
    18. 18. Describe the Common Issues that Occur During WAN Implementation <ul><li>Describe the recommended steps for troubleshooting a WAN </li></ul>
    19. 19. Troubleshoot Enterprise Network Implementation Issues <ul><li>Explain how network diagrams are used for troubleshooting </li></ul>
    20. 20. Troubleshoot Enterprise Network Implementation Issues <ul><li>Describe how to troubleshoot network problems occurring at the physical layer </li></ul>
    21. 21. Troubleshoot Enterprise Network Implementation Issues <ul><li>Describe how to troubleshoot network problems occurring at the data link layer </li></ul>
    22. 22. Troubleshoot Enterprise Network Implementation Issues <ul><li>Describe how to troubleshoot network problems occurring at the network layer </li></ul>
    23. 23. Troubleshoot Enterprise Network Implementation Issues <ul><li>Describe how to troubleshoot network problems occurring at the transport layer </li></ul>
    24. 24. Troubleshoot Enterprise Network Implementation Issues <ul><li>Describe how to troubleshoot network problems occurring in the application layers </li></ul>
    25. 25. Summary <ul><li>Network Baseline </li></ul><ul><ul><li>How a network is expected to perform under normal conditions </li></ul></ul><ul><li>Network documentation should include: </li></ul><ul><ul><li>Network configuration table </li></ul></ul><ul><ul><li>End-system configuration table </li></ul></ul><ul><ul><li>Network topology diagram </li></ul></ul><ul><li>Planning for the 1 st baseline </li></ul><ul><ul><li>Determine what type of data to collect </li></ul></ul><ul><ul><li>Identify devices and ports of interest </li></ul></ul><ul><ul><li>Determine baseline duration </li></ul></ul>
    26. 26. Summary <ul><li>3 stages of the troubleshooting process </li></ul><ul><ul><li>Gather symptoms </li></ul></ul><ul><ul><li>Isolate problem </li></ul></ul><ul><ul><li>Correct problem </li></ul></ul><ul><li>3 main methods for troubleshooting a network </li></ul><ul><ul><li>Bottom up </li></ul></ul><ul><ul><li>Top down </li></ul></ul><ul><ul><li>Divide & conquer </li></ul></ul>
    27. 27. Summary <ul><li>Software troubleshooting tools </li></ul><ul><ul><li>Cisco view </li></ul></ul><ul><ul><li>Solar winds </li></ul></ul><ul><ul><li>HP Open view </li></ul></ul><ul><li>Hardware troubleshooting tools </li></ul><ul><ul><li>Network analysis mode </li></ul></ul><ul><ul><li>Digital multi-meters </li></ul></ul><ul><ul><li>Cable testers </li></ul></ul><ul><ul><li>Network analyzer </li></ul></ul>
    28. 28. Summary <ul><li>Common WAN implementation issues include </li></ul><ul><ul><li>QoS </li></ul></ul><ul><ul><li>Reliability </li></ul></ul><ul><ul><li>Security </li></ul></ul><ul><ul><li>Latency </li></ul></ul><ul><ul><li>Confidentiality </li></ul></ul><ul><ul><li>Public or Private </li></ul></ul><ul><li>Using a layered approach to troubleshooting aids in </li></ul><ul><li>isolating and solving the problem </li></ul>

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