Troubleshooting and Maintaining Cisco IP Networks (TSHOOT) Foundation Learning Guide: (CCNP TSHOOT 300-135)

About

Features

• Cisco authorized self-study book for CCNP Troubleshooting and Maintenance foundation learning
• Unique content developed in conjunction with Learning@Cisco, the developers of the new CCNP Troubleshooting and Maintaining Cisco IP Networks (TSHOOT) recommended course and CCNP TSHOOT exam
• Includes self-assessment review questions, chapter objectives and summaries, key term definitions, and case studies

Description

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

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Troubleshooting Methods for Cisco IP Networks

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Table of Contents

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 Problem and Making a Troubleshooting Plan 249

Gathering Information 250

Proposing a Hypothesis and Testing the Hypothesis 251

Solving the Problem 252

Summary 252

Review Questions 255

Chapter 8 Troubleshooting Case Study: PILE Forensic Accounting 257

PILE Forensic Accounting Trouble Ticket 1 258

Troubleshooting PILE's Branch Connectivity to HQ and the Internet 258

Verifying and Defining the Problem 258

Gathering Information 260

Analyzing Information 264

Proposing a Hypothesis and Testing the Hypothesis 264

Solving the Problem 265

Troubleshooting EIGRP Adjacency 266

Troubleshooting PILE's Secondary Internet Connection Through ISP2 267

Verifying and Defining the Problem 267

Gathering Information 268

Analyzing Information and Proposing a Hypothesis 270

Testing the Hypothesis 271

Solving the Problem 273

PILE Forensic Accounting Trouble Ticket 2 274

Troubleshooting Telnet Problem: From PC3 to BR 274

Gathering Information 275

Troubleshooting PILE Network's Internet Access Problem 275

Verifying and Defining the Problem 276

Gathering Information 276

Analyzing Information, Eliminating Causes, and Gathering Further Information 278

Proposing and Testing a Hypothesis 280

Solving the Problem 281

Troubleshooting BGP 281

Troubleshooting PILE Network's NTP Problem 282

Verifying the Problem 283

Gathering Information 283

Analyzing the Gathered Information and Gathering Further Information 284

Proposing a Hypothesis and Testing the Hypothesis 285

Solving the Problem 286

Troubleshooting NTP 286

PILE Forensic Accounting Trouble Ticket 3 287

Troubleshooting PC3's Lack of Internet Connectivity After the Disaster Recovery 287

Verifying the Problem 288

Gathering Information (First Run) 288

Analyzing Information, Proposing, and Testing the First Hypothesis 289

Proposing and Testing the Second Hypothesis 290

Gathering Further Information (Second Run) 292

Proposing and Testing the Third Hypothesis 293

Solving the Problem 294

Disaster Recovery Best Practices 294

Troubleshooting Inter-VLAN Routing 296

Troubleshooting PC4's Problem Accessing Cisco.com 297

Verify the Problem and Select an Approach 297

Gather Information and Analyze the Information 298

Proposing and Testing a Hypothesis 299

Solve the Problem 299

Troubleshooting DNS 300

Remote Device Management Notes 301

PILE Forensic Accounting Trouble Ticket 4 302

Troubleshooting Branch Site Internet Connectivity Problem After EIGRP Reconfiguration 302

Verifying the Problem 302

Gathering Information 303

Gathering Further Information and Analyzing Information 303

Proposing a Hypothesis and Testing the Hypothesis 305

Solving the Problem 307

The EIGRP Stub Configuration 308

The New EIGRP Named Configuration 309

Troubleshooting Management Access to ASW2 310

Verifying the Problem 310

Gathering Information 310

Proposing a Hypothesis and Testing the Hypothesis 311

Solving the Problem 312

Providing a Default Route on Layer 2 And Multilayer Devices 313

PILE Forensic Accounting Trouble Ticket 5 313

Troubleshooting the Redundant Internet Access Path Through the New HQ0 Edge Router 314

Verifying and Defining the Problem 314

Gathering Information 315

Proposing a Hypothesis and Testing the Hypothesis 318

Solving the Problem 319

Troubleshooting BGP Route Selection 321

Troubleshooting Unauthorized Telnet Access 322

Verifying the Problem 322

Gathering Information 322

Gathering Further Information and Analysis Information 323

Proposing a Hypothesis and Testing the Hypothesis 324

Solving the Problem 325

Securing the Management Plane 325

Summary 326

Review Questions 329

Chapter 9 Troubleshooting Case Study: Bank of POLONA 333

Bank of POLONA Trouble Ticket 1 334

Troubleshooting PC3's Lack of Connectivity to SRV2 335

Verifying the Problem 335

Gathering Information 336

Analyzing Information and Proposing a Hypothesis, and Testing the Hypothesis 338

Solving the Problem 339

Troubleshooting Redistribution 339

Troubleshooting VRRP with Interface Tracking 340

Verifying the Problem 340

Gathering Information 341

Analyzing the Information 342

Proposing and Testing a Hypothesis 342

Solving the Problem 343

FHRP Tracking Options 344

Troubleshooting IP SLA Test Not Starting 345

Verifying the Problem 345

Gathering Information 346

Proposing and Testing a Hypothesis 347

Solving the Problem 348

Troubleshooting IP SLA 349

Bank of POLONA Trouble Ticket 2 349

Troubleshooting Summarization Problem on BR3 350

Verifying the Problem 350

Gathering Information 350

Analyzing Information 351

Proposing and Testing a Hypothesis 351

Solving the Problem 352

Troubleshooting EIGRP Summarization 353

Troubleshooting PC0's IPv6 Internet Connectivity 353

Verifying the Problem 353

Gathering Information 354

Analyzing Information 356

Proposing and Testing a Hypothesis 356

Solving the Problem 357

Troubleshooting RIPng 357

Troubleshooting Branch 3's IPv6 Internet Connectivity 358

Verifying the Problem 358

Gathering Information 359

Analyzing Information 361

Proposing and Testing a Hypothesis 361

Solving the Problem 362

Troubleshooting Access Control Lists 362

Bank of POLONA Trouble Ticket 3 364

Troubleshooting Branch 1's IP Connectivity to the Headquarters 364

Verifying the Problem 364

Gathering Information 365

Proposing and Testing

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