CCNA Exploration 4 - Chapter 8
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The document discusses network troubleshooting and access to wide area networks (WANs). It covers establishing a baseline for normal network performance, troubleshooting methodologies and tools, common WAN implementation issues, and troubleshooting enterprise network problems. Specific topics include documenting the network configuration, measuring baseline performance, using layered models for troubleshooting, addressing issues with quality of service, reliability, latency and other factors during WAN implementation.
CCNA Exploration 4 - Chapter 8
- 1. Network Troubleshooting Accessing the WAN – Chapter 8 © 2006 Cisco Systems, Inc. All rights Version 4.0 reserved. Cisco Public 1
- 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 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 2
- 3. Establish a Network Baseline Explain the importance of network documentation © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 3
- 4. Establish a Network Baseline Describe the stages of the network documentation process © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 4
- 5. Establish a Network Baseline Explain the purpose for measuring normal network performance when creating a baseline © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 5
- 6. Establish a Network Baseline Describe the steps for establishing a network baseline © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 6
- 7. Describe Troubleshooting Methodologies and Troubleshooting Tools Explain why a systematic method is the generally the best approach to troubleshooting © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 7
- 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 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 8
- 9. Describe Troubleshooting Methodologies and Troubleshooting Tools Describe the three stages of the general troubleshooting process © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 9
- 10. Describe Troubleshooting Methodologies and Troubleshooting Tools Describe the three main methods for troubleshooting network problems © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 10
- 11. Describe Troubleshooting Methodologies and Troubleshooting Tools Describe the stages for gathering symptoms for troubleshooting a network problem © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 11
- 12. Describe Troubleshooting Methodologies and Troubleshooting Tools Describe the types of software and hardware tools that are commonly used when troubleshooting networks © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 12
- 13. Describe the Common Issues that Occur During WAN Implementation Describe the fundamentals in WAN design and communication © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 13
- 14. Describe the Common Issues that Occur During WAN Implementation Describe the steps for designing or modifying a WAN © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 14
- 15. Describe the Common Issues that Occur During WAN Implementation Describe the considerations for analyzing WAN traffic © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 15
- 16. Describe the Common Issues that Occur During WAN Implementation Describe the considerations for designing a WAN topology © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 16
- 17. Describe the Common Issues that Occur During WAN Implementation Describe common WAN implementation issues © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 17
- 18. Describe the Common Issues that Occur During WAN Implementation Describe the recommended steps for troubleshooting a WAN © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 18
- 19. Troubleshoot Enterprise Network Implementation Issues Explain how network diagrams are used for troubleshooting © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 19
- 20. Troubleshoot Enterprise Network Implementation Issues Describe how to troubleshoot network problems occurring at the physical layer © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 20
- 21. Troubleshoot Enterprise Network Implementation Issues Describe how to troubleshoot network problems occurring at the data link layer © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 21
- 22. Troubleshoot Enterprise Network Implementation Issues Describe how to troubleshoot network problems occurring at the network layer © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 22
- 23. Troubleshoot Enterprise Network Implementation Issues Describe how to troubleshoot network problems occurring at the transport layer © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 23
- 24. Troubleshoot Enterprise Network Implementation Issues Describe how to troubleshoot network problems occurring in the application layers © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 24
- 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 1st baseline – Determine what type of data to collect – Identify devices and ports of interest – Determine baseline duration © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 25
- 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 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 26
- 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 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 27
- 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 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 28
- 29. © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 29