Troubleshooting and Maintaining Cisco IP Networks (TSHOOT) Foundation Learning Guide
Troubleshooting and Maintaining Cisco IP Networks (TSHOOT) Foundation Learning Guide Troubleshooting and Maintaining Cisco IP Networks (TSHOOT) Foundation Learning Guide is your Cisco authorized learning tool for CCNP TSHOOT 300-135 exam preparation. Part of the Cisco Press Foundation Learning Guide series, it teaches you how to maintain and monitor even the most complex enterprise networks. You’ll compare and master today’s leading approaches to troubleshooting, including an efficient structured process for maximizing network uptime in the context of your own organization’s policies and procedures. Coverage includes gathering information, capturing traffic, using event notifications, working with maintenance and trouble-shooting tools, and more. Throughout,
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Troubleshooting and Maintaining Cisco IP Networks (TSHOOT) Foundation Learning Guide
Troubleshooting and Maintaining Cisco IP Networks (TSHOOT) Foundation Learning Guide is your Cisco authorized learning tool for CCNP TSHOOT 300-135 exam preparation. Part of the Cisco Press Foundation Learning Guide series, it teaches you how to maintain and monitor even the most complex enterprise networks.
You’ll compare and master today’s leading approaches to troubleshooting, including an efficient structured process for maximizing network uptime in the context of your own organization’s policies and procedures. Coverage includes gathering information, capturing traffic, using event notifications, working with maintenance and trouble-shooting tools, and more.
Throughout, each chapter opens with a list of topics that clearly identify its focus. Each chapter ends with a summary of key concepts for quick study, as well as review questions to assess and reinforce your understanding. To deepen your hands-on expertise and strengthen your exam readiness, this guide also presents five full chapters of real-world troubleshooting case studies.
This guide is ideal for all certification candidates who want to master all the topics covered on the TSHOOT 300-135 exam.
--The official textbook for the Cisco Networking Academy CCNP TSHOOT 300-135 course
--Thoroughly introduces proven troubleshooting principles and common troubleshooting approaches
--Defines structured troubleshooting and reviews its subprocesses
--Shows how to integrate troubleshooting into day-to-day network maintenance processes
--Covers information gathering on Layer 2 switching and Layer 3 routing with IOS show and debug commands, ping, and telnet
--Introduces specialized tools for capturing traffic, gathering information (SNMP and NetFlow), and receiving network event notifications (EEM)
--Uses extensive troubleshooting examples and diagrams to support explanations and strengthen your understanding
--Presents self-assessment review questions, chapter objectives, and summaries to facilitate effective studying
Chapter 1 Troubleshooting Methods 1
Troubleshooting Principles 1
Structured Troubleshooting Approaches 4
The Top-Down Troubleshooting Approach 6
The Bottom-Up Troubleshooting Approach 7
The Divide-and-Conquer Troubleshooting Approach 8
The Follow-the-Path Troubleshooting Approach 9
The Compare-Configurations Troubleshooting Approach 10
The Swap-Components Troubleshooting Approach 11
Troubleshooting Example Using Six Different Approaches 12
Summary 13
Review Questions 14
Chapter 2 Structured Troubleshooting 15
Troubleshooting Method and Procedure 16
Defining the Problem 17
Gathering Information 18
Analyzing the Information 20
Eliminating Potential Causes 21
Proposing a Hypothesis (Likely Cause of the Problem) 21
Testing and Verifying Validity of the Proposed Hypothesis 23
Solving the Problem and Documenting the Work 24
Troubleshooting Example Based on the Structured Method and Procedures 25
Summary 26
Review Questions 27
Chapter 3 Network Maintenance Tasks and Best Practices 29
Structured Network Maintenance 29
Network Maintenance Processes and Procedures 31
Common Maintenance Tasks 32
Network Maintenance Planning 33
Scheduling Maintenance 33
Formalizing Change-Control Procedures 34
Establishing Network Documentation Procedures 34
Establishing Effective Communication 35
Defining Templates/Procedures/Conventions (Standardization) 36
Planning for Disaster Recovery 36
Network Maintenance Services and Tools 37
Network Time Services 39
Logging Services 40
Performing Backup and Restore 42
Integrating Troubleshooting into the Network Maintenance Process 47
Network Documentation and Baseline 48
Communication 50
Change Control 53
Summary 54
Review Questions 57
Chapter 4 Basic Switching and Routing Process and Effective IOS Troubleshooting Commands 61
Basic Layer 2 Switching Process 61
Ethernet Frame Forwarding (Layer 2 Data Plane) 62
Layer 2 Switching Verification 67
Basic Layer 3 Routing Process 69
IP Packet Forwarding (Layer 3 Data Plane) 70
Using IOS Commands to Verify IP Packet Forwarding 73
Selective Information Gathering Using IOS show Commands, debug Commands, Ping, and Telnet 76
Filtering and Redirecting show Command’s Output 76
Testing Network Connectivity Using Ping and Telnet 81
Collecting Real-Time Information Using Cisco IOS debug Commands 85
Diagnosing Hardware Issues Using Cisco IOS Commands 86
Checking CPU Utilization 87
Checking Memory Utilization 88
Checking Interfaces 89
Summary 92
Review Questions 94
Chapter 5 Using Specialized Maintenance and Troubleshooting Tools 99
Categories of Troubleshooting Tools 100
Traffic-Capturing Features and Tools 101
SPAN 102
RSPAN 103
Information Gathering with SNMP 105
Information Gathering with NetFlow 107
Network Event Notification 109
Summary 113
Review Questions 114
Chapter 6 Troubleshooting Case Study: SECHNIK Networking 117
SECHNIK Networking Trouble Ticket 1 118
Troubleshooting PC1’s Connectivity Problem 118
Gathering Information 119
Analyzing Information, Eliminating Causes, and Gathering Further Information 119
Proposing Hypotheses 121
Testing the Hypotheses and Solving the Problem 121
Troubleshooting Ethernet Trunks 122
Troubleshooting PC2’s Connectivity Problem 123
Gathering Information 124
Proposing a Hypothesis, Testing the Hypothesis, and Solving the Problem 126
Troubleshooting NAT 127
Troubleshooting PC3’s Connectivity Problem 128
Gathering Information 129
Eliminating Possibilities, Proposing a Hypothesis, and Testing the Hypothesis 129
Troubleshooting Network Device Interfaces 130
Troubleshooting PC4’s IPv6 Connectivity Problem 131
Gathering Information 131
Eliminating Possibilities, Proposing a Hypothesis, and Testing the Hypothesis 132
Troubleshooting IPv6 Address Assignment on Clients 133
SECHNIK Networking Trouble Ticket 2 134
Troubleshooting PC1’s Internet Connectivity Problem 134
Gathering Information 135
Proposing a Hypothesis, Testing the Hypothesis, and Solving the Problem 137
Troubleshooting Network Layer Connectivity 138
Troubleshooting PC2’s SSH Connectivity Problem 141
Verifying and Defining the Problem 141
Gathering Information 142
Proposing a Hypothesis and Testing the Hypothesis 143
TCP Three-Way Handshake 145
Troubleshooting PC4’s DHCP Address Problem 146
Verifying and Defining the Problem 146
Gathering Information 147
Proposing a Hypothesis, Testing a Hypothesis, and Solving the Problem 148
Troubleshooting Error-Disabled Ports 151
SECHNIK Networking Trouble Ticket 3 152
Troubleshooting PC1 and PC2’s Internet Connectivity Issues 153
Verifying and Defining the Problem 153
Gathering Information 153
Proposing a Hypothesis and Testing the Hypothesis 157
Solving the Problem 159
Troubleshooting DHCP 160
The passive-interface Command 161
Troubleshooting PC3’s Internet Connectivity Issues 162
Verifying and Defining the Problem 162
Gathering Information 162
Proposing a Hypothesis and Testing the Hypothesis 164
Solving the Problem 165
IPv6 Review 166
Summary 166
Review Questions 169
Chapter 7 Troubleshooting Case Study: TINC Garbage Disposal 173
TINC Garbage Disposal Trouble Ticket 1 174
Troubleshooting Lack of Backup Internet Connectivity Through GW2 174
Information Gathering 176
Analyzing Information, Eliminating Possibilities, and Proposing a Hypothesis 178
Proposing a Hypothesis, Testing the Hypothesis, and Solving the Problem 178
Troubleshooting BGP Neighbor Relationships 181
Troubleshooting PC1’s Connectivity Problem 182
Gathering Information 182
Analyzing Information and Gathering Further Information 183
Proposing a Hypothesis, Testing the Hypothesis, and Solving the Problem 184
Troubleshooting Port Security 186
Troubleshooting PC2’s Connectivity Problem 187
Gathering Information 188
Eliminating Possibilities, Proposing a Hypothesis, and Testing the Hypothesis 190
Solving the Problem 191
Troubleshooting VLANs 192
TINC Garbage Disposal Trouble Ticket 2 193
Troubleshooting GW1’s OSPF Neighbor Relation Problem with Router R1 194
Verifying the Problem 194
Gathering Information 194
Analyzing Information, Eliminating Possibilities, and Proposing a Hypothesis 199
Testing the Hypothesis and Solving the Problem 199
Troubleshooting OSPF Adjacency 201
Troubleshooting Secure Shell Version 2 Access to Router R2 from PC4 202
Verifying the Problem 202
Gathering Information 203
Proposing a Hypothesis and Testing the Hypothesis 204
Solving the Problem 205
Troubleshooting SSH and Telnet 206
Troubleshooting Duplicate Address Problem Discovered Through R1 and R2’s Log Messages 207
Verifying the Problem 207
Gathering Information 207
Analyzing the Information and Proposing a Hypothesis 210
Testing the Hypothesis and Solving the Problem 210
Troubleshooting HSRP 211
TINC Garbage Disposal Trouble Ticket 3 212
Troubleshooting Sporadic Internet Connectivity Problem Experienced by Users of PC1 and PC2 212
Verifying and Defining the Problem 213
Gathering Information 213
Analyzing Information and Proposing a Hypothesis 215
Testing the Hypothesis and Solving the Problem 217
Troubleshooting Erroneous Routing Information 218
Troubleshooting Multiple Masters within a VRRP 220
Verifying and Defining the Problem 220
Gathering Information 221
Analyzing the Information and Proposing a Hypothesis 222
Testing the Hypothesis, and Solving the Problem 222
Troubleshooting VRRP 224
Troubleshooting EtherChannel Between ASW4 and ASW3 224
Verifying the Problem 224
Defining the Problem 225
Gathering Information 225
Proposing a Hypothesis and Testing the Hypothesis 227
Solving the Problem 228
Troubleshooting EtherChannel 229
TINC Garbage Disposal Trouble Ticket 4 231
Troubleshooting Inconsistent and Sporadic Internet Connectivity Problem Experienced By Users of PC1 and PC2 231
Verifying and Defining the Problem 232
Gathering Information 233
Analyzing Information and Proposing a Hypothesis 235
Testing the Hypotheses 235
Solving the Problem 239
Troubleshooting FHRPs 241
Troubleshooting Sporadic Loss of Connectivity on PC4 242
Verifying the Problem and Making a Troubleshooting Plan 242
Gathering Information 242
Analyzing the Information and Gathering Further Information 244
Proposing a Hypothesis and Testing the Hypothesis 245
Solving the Problem 246
The Cisco IOS DHCP Snooping Feature 248
Cisco Technical Assistance Center 248
Troubleshooting SSH Connection from PC4 to Router GW2 249
Verifying the
Troubleshooting and Maintaining Cisco IP Networks (TSHOOT) Foundation Learning Guide Troubleshooting and Maintaining Cisco IP Networks (TSHOOT) Foundation Learning Guide is your Cisco authorized learning tool for CCNP TSHOOT 300-135 exam preparation. Part of the Cisco Press Foundation Learning Guide series, it teaches you how to maintain and monitor even the most complex enterprise networks. You’ll compare and master today’s leading approaches to troubleshooting, including an efficient structured process for maximizing network uptime in the context of your own organization’s policies and procedures. Coverage includes gathering information, capturing traffic, using event notifications, working with maintenance and trouble-shooting tools, and more. Throughout,