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

Transcript

  • 1. Network Troubleshooting Accessing the WAN – Chapter 8
  • 2. Objectives
    • Establish a network baseline
    • Describe troubleshooting methodologies and troubleshooting tools
    • Describe the common issues that occur during WAN implementation
    • Troubleshoot enterprise network implementation issues
  • 3. Establish a Network Baseline
    • Explain the importance of network documentation
  • 4. Establish a Network Baseline
    • Describe the stages of the network documentation process
  • 5. Establish a Network Baseline
    • Explain the purpose for measuring normal network performance when creating a baseline
  • 6. Establish a Network Baseline
    • Describe the steps for establishing a network baseline
  • 7. Describe Troubleshooting Methodologies and Troubleshooting Tools
    • Explain why a systematic method is the generally the best approach to troubleshooting
  • 8. Describe Troubleshooting Methodologies and Troubleshooting Tools
    • Describe how layered models, such as the OSI reference model or TCP/IP model, are used for troubleshooting
  • 9. Describe Troubleshooting Methodologies and Troubleshooting Tools
    • Describe the three stages of the general troubleshooting process
  • 10. Describe Troubleshooting Methodologies and Troubleshooting Tools
    • Describe the three main methods for troubleshooting network problems
  • 11. Describe Troubleshooting Methodologies and Troubleshooting Tools
    • Describe the stages for gathering symptoms for troubleshooting a network problem
  • 12. Describe Troubleshooting Methodologies and Troubleshooting Tools
    • Describe the types of software and hardware tools that are commonly used when troubleshooting networks
  • 13. Describe the Common Issues that Occur During WAN Implementation
    • Describe the fundamentals in WAN design and communication
  • 14. Describe the Common Issues that Occur During WAN Implementation
    • Describe the steps for designing or modifying a WAN
  • 15. Describe the Common Issues that Occur During WAN Implementation
    • Describe the considerations for analyzing WAN traffic
  • 16. Describe the Common Issues that Occur During WAN Implementation
    • Describe the considerations for designing a WAN topology
  • 17. Describe the Common Issues that Occur During WAN Implementation
    • Describe common WAN implementation issues
  • 18. Describe the Common Issues that Occur During WAN Implementation
    • Describe the recommended steps for troubleshooting a WAN
  • 19. Troubleshoot Enterprise Network Implementation Issues
    • Explain how network diagrams are used for troubleshooting
  • 20. Troubleshoot Enterprise Network Implementation Issues
    • Describe how to troubleshoot network problems occurring at the physical layer
  • 21. Troubleshoot Enterprise Network Implementation Issues
    • Describe how to troubleshoot network problems occurring at the data link layer
  • 22. Troubleshoot Enterprise Network Implementation Issues
    • Describe how to troubleshoot network problems occurring at the network layer
  • 23. Troubleshoot Enterprise Network Implementation Issues
    • Describe how to troubleshoot network problems occurring at the transport layer
  • 24. Troubleshoot Enterprise Network Implementation Issues
    • Describe how to troubleshoot network problems occurring in the application layers
  • 25. Summary
    • Network Baseline
      • How a network is expected to perform under normal conditions
    • Network documentation should include:
      • Network configuration table
      • End-system configuration table
      • Network topology diagram
    • Planning for the 1 st baseline
      • Determine what type of data to collect
      • Identify devices and ports of interest
      • Determine baseline duration
  • 26. Summary
    • 3 stages of the troubleshooting process
      • Gather symptoms
      • Isolate problem
      • Correct problem
    • 3 main methods for troubleshooting a network
      • Bottom up
      • Top down
      • Divide & conquer
  • 27. Summary
    • Software troubleshooting tools
      • Cisco view
      • Solar winds
      • HP Open view
    • Hardware troubleshooting tools
      • Network analysis mode
      • Digital multi-meters
      • Cable testers
      • Network analyzer
  • 28. Summary
    • Common WAN implementation issues include
      • QoS
      • Reliability
      • Security
      • Latency
      • Confidentiality
      • Public or Private
    • Using a layered approach to troubleshooting aids in
    • isolating and solving the problem
  • 29.