CCNA 5 0 Planning Guide Chapter 9 Troubleshooting

Chapter 9: Objectives § Explain how network documentation is developed and used to troubleshoot network issues. § Describe the general troubleshooting process. § Compare troubleshooting methods that use a systematic, layered approach. § Describe troubleshooting tools used to gather and analyze symptoms of network problems. § Determine the symptoms and causes of network problems using a layered model. § Troubleshoot a network using the layered model. Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 2

Chapter 9: Overview This chapter: § Describes the network documentation that should be maintained § Defines general troubleshooting procedures, methods, and tools § Discusses typical symptoms and causes at several layers of the OSI model are also discussed § Includes information about troubleshooting path and ACL issues Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 3

Chapter 9: Activities What activities are associated with this chapter? § 9. 0. 1. 2 Class Activity – Network Breakdown § 9. 1. 1. 6 Activity – Identify Benefits for Establishing a Network Baseline § 9. 1. 1. 7 Activity – Identify Commands Used for Measuring Data § 9. 1. 1. 8 Packet Tracer – Troubleshooting Challenge – Documenting the Network § 9. 1. 2. 4 Activity – Identify Commands for Gathering Symptoms § 9. 1. 3. 5 Activity – Troubleshooting Methods § 9. 2. 1. 5 Activity – Identify Common Troubleshooting Tools § 9. 2. 2. 7 Activity – Identifying the OSI Layer Associated with a Network Issue Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 4

Chapter 9: Activities (cont. ) What activities are associated with this chapter? § 9. 2. 3. 11 Activity – Identify Commands to Troubleshoot a Network Issue § 9. 2. 3. 12 Packet Tracer – Troubleshooting Enterprise Networks 1 § 9. 2. 3. 13 Packet Tracer – Troubleshooting Enterprise Networks 2 § 9. 2. 3. 14 Packet Tracer – Troubleshooting Enterprise Networks 3 § 9. 2. 3. 15 Packet Tracer – Troubleshooting Challenge – Using Documentation to Solve Issues § 9. 3. 1. 1 Class Activity – Documentation Development Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 5

Chapter 9: Packet Tracer Activity Password The password for all the Packet Tracer activities in this chapter is: PT_ccna 5 Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 6

Chapter 9: Assessment § Students should complete Chapter 9, “Assessment” after completing Chapter 9. § Worksheets and labs and quizzes can be used to informally assess student progress. Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 7

Chapter 9: New Terms What terms are introduced in this chapter? 9. 1. 1. 1 9. 1. 1. 3 Network Configuration Files End-system Configuration Files Network Topology Diagrams Physical Topology Logical Topology Baseline 9. 1. 1. 4 Cisco Wide Area Application Services (WAAS) 9. 1. 3. 2 Bottom-up Top-down Divide-and-conquer Network Management System (NMA) Tools Knowledge Bases Protocol Analyzer Cisco IOS Embedded Packet Capture (EPC) Network Analysis Module Portable Network Analyzers 9. 1. 1. 2 9. 2. 1. 1 9. 2. 1. 2 9. 2. 1. 3 Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 8

Chapter 9: New Terms (cont. ) What terms are introduced in this chapter? 9. 2. 2. 1 9. 2. 2. 2 9. 2. 2. 5 9. 2. 3. 3 Presentation_ID Network Bottleneck Network Congestion Attenuation Noise CPU Overhead Encapsulation Errors Framing Errors BOOTP Input Queue Drops Output Queue Drops Input Errors Output Errors © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 9

Chapter 9: Best Practices § Prior to teaching Chapter 9, the instructor should complete Chapter 9, “Assessment. ” § Emphasize the value in building good troubleshooting skills. § Ensure students pick one method of troubleshooting and stick with it. Many times students mix the methods and never develop good troubleshooting skills. § Emphasize that troubleshooting is a skill that must be practiced to be good. § Provide students with a lot of practical examples of real-world troubleshooting. § Use troubleshooting methods when answering student questions about labs. Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 10

Chapter 9: Additional Help § For additional help with teaching strategies, including lesson plans, analogies for difficult concepts, and discussion topics, visit the CCNA Community at http: //community. netacad. net/web/ccna/files. § If you have lesson plans or resources that you would like to share, upload them to the CCNA Community to help other instructors. Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 11

Chapter 9: Topics Not in ICND 2 200 -101 § This section lists topics covered by this chapter that are NOT listed in the ICND 2 200 -101 Blueprint. Those topics are posted at http: //www. cisco. com/web/learning/exams/list/icnd 2 b. html. § Instructors could skip these sections; however, they should provide additional information and fundamental concepts to assist the student with the topic. Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 12

Chapter 9: Topics Not in ICND 2 200 -101 What sections of this chapter are NOT in the ICND 2 200 -101 certification blueprint? 9. 0 Introduction 9. 1 Troubleshooting with a Systematic Approach 9. 2. 1. 1 Software Troubleshooting Tools 9. 2. 1. 2 Software Troubleshooting Tools, Cont. 9. 2. 1. 3 Hardware Troubleshooting Tools 9. 2. 1. 5 Activity - Identify Common Troubleshooting Tools 9. 2. 2. 1 Physical Layer Troubleshooting 9. 2. 2. 4 Transport Layer Troubleshooting - ACLs 9. 2. 2. 5 Transport Layer Troubleshooting – NAT for IPv 4 9. 2. 2. 6 Application Layer Troubleshooting 9. 2. 2. 7 Activity - Identify the OSI Layer Associated with a Network Issue 9. 2. 3. 1 Components of Troubleshooting End-to-End Connectivity 9. 2. 3. 2 End-to-End Connectivity Problem Initiates Troubleshooting 9. 2. 3. 3 Step 1 - Verify the Physical Layer Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 13

Chapter 9: Topics Not in ICND 2 200 -101 (cont. ) What sections of this chapter are NOT in the ICND 2 200 -101 certification blueprint? 9. 2. 3. 4 Step 2 - Check for Duplex Mismatches 9. 2. 3. 5 Step 3 - Verify Layer 2 and Layer 3 Addressing on the Local Network 9. 2. 3. 8 Step 6 - Verify the Transport Layer 9. 2. 3. 9 Step 7 - Verify ACLs 9. 2. 3. 10 Step 8 - Verify DNS 9. 2. 3. 11 Activity - Identify Commands to Troubleshoot a Network Issue 9. 2. 3. 12 Packet Tracer - Troubleshooting Enterprise Networks 1 9. 2. 3. 13 Packet Tracer - Troubleshooting Enterprise Networks 2 9. 2. 3. 14 Packet Tracer - Troubleshooting Enterprise Networks 3 9. 2. 3. 15 Packet Tracer - Troubleshooting Challenge - Using Documentation to Solve Issues 9. 3 Presentation_ID Summary © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 14