Section 10.1: Troubleshooting Overview

Summary

This section provides a troubleshooting overview for the students. They will become familiar with a systematic approach to problem solving:

 

1.    Identify the symptoms and potential causes.

2.    Identify the affected area and determine how large the problem is.

3.    Establish what has changed

4.    Review the list of potential causes and select the most probable cause

5.    Escalate the problem if it is beyond your ability to fix or your scope of management.

6.    Create an action plan and account for side effects of the proposed plan

7.    When side effects have been weighed against the fix and all concerns have been address, fix the problem.

8.    Identify the results and effects of the solution.

9.    Document the solution and process.

 

Tools that can be used to perform the following tasks when troubleshooting network problems include:

 

 

Lecture Focus Questions:

Video/Demo††††††††††††††††††††††††††††††††††††††††††††††††††††††††† Time

10.1.1 Troubleshooting Methodology†††††††††††††††††††††††† † 7:09
10.1.3 Troubleshooting Utilities†††††††††††††††††††††††††††††††††† † 9:41

Total†††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††† 16:50

Section 10.2: Troubleshooting Network Communication

 

This section discusses using ping and traceroute to troubleshoot network communication problems.† It provides a scenario for the students to learn the steps to trace the source of a connectivity problem.

 

Students will learn how to:

Lecture Focus Questions:

Video/Demo††††††††††††††††††††††††††††††††††††††††††††††††††††††††† Time

10.2.1 Troubleshooting Network Issues†††††††††††††††††††† † 8:52
10.2.2 Using Ping and Traceroute††††††††††††††††††††††††††††† 12:52

Total†††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††† 21:44

Lab/Activity

Section 10.3: Troubleshooting Physical Connectivity

Summary

This section examines troubleshooting the physical connectivity of a network.†

 

Students will learn how to:

Network Pro Objectives

Lecture Focus Questions:

Video/Demo††††††††††††††††††††††††††††††††††††††††††††††††††††††††† Time

10.3.1 Troubleshooting the Fault Domain†††† †††††††††† 8:38
10.3.3 Troubleshooting the Link Status††††††††††††††††††† 6:53
10.3.5 Troubleshooting Wiring Issues††††††††††††††††††††19:39
10.3.7 Troubleshooting Tools††††††††††††††††††††††††††††††††††17:48

††††† Total††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††† †††††52:58

Lab/Activity

Section 10.4: Troubleshooting IP Configuration

Summary

In this section students will learn commands to troubleshoot IP configuration problems. They will learn how to interpret the output of ipconfig /all for the following conditions:

 

 

Commands that can be used on a Windows system to gather network information include:

 

 

The netsh command is used to clear the ARP cache.

 

Students will learn to:

Lecture Focus Questions:

Video/Demo††††††††††††††††††††††††††††††††††††††††††††††††††††††††† Time

10.4.1 Troubleshooting IP Configuration†††††† 11:36
10.4.2 Using ipconfig††††††††††††††††††††††††††††††††††††††† † ††††††††† ††7:43
10.4.3 Using ifconfig†††††††††††††††††††††††††††††††††††††††† † ††††††††† ††3:24
10.4.10 Using arp, netstat, and nbtstat†††††††††† † ††††††††† 12:07

Total††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††34:50

Lab/Activity

Section 10.5: Troubleshooting Name Resolution

Summary

This section examines troubleshooting name resolution problems. Students will learn:

 

 

Students will learn how to:

Lecture Focus Questions:

Video/Demo††††††††††††††††††††††††††††††††††††††††††††††††††††††††† Time

10.5.1 Troubleshooting Name Resolution†††††††††††††††† † 1:54
10.5.3 Using nslookup and dig††††††††††††††††††††††††††††††††††† 10:34

Total†††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††12:28

Section 10.6: Troubleshooting Switching

Summary

In this section students will learn how to troubleshoot switches on the network.† Several problems and countermeasures to the problems are presented.

 

 

Lecture Focus Questions:

Video/Demo††††††††††††††††††††††††††††††††††††††††††††††††††††††††† Time

10.6.1 Switch Troubleshooting††††††††††††††††††††††††††††††††††† 10:43

Section 10.7: Troubleshooting Routing

Summary

This section discusses facts about troubleshooting routing issues. The following routing problems are discussed:

 

 

Students will learn how to:

Network Pro Objectives
Network+ Objectives

 

Lecture Focus Questions:

Video/Demo††††††††††††††††††††††††††††††††††††††††††††††††††††††††† Time

10.7.1 Routing Troubleshooting††††††††††††††††††††††††††††††††† 11:21
10.7.2 Troubleshooting Routing††††††††††††††††††††††††††††††††† † 8:52

Total††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††20:13

Lab/Activity

Section 10.8: Troubleshooting Wireless

Summary

This section discusses facts about troubleshooting wireless networking issues. Factors to consider when you have trouble establishing or keeping a wireless connection are discussed:

 

 

Lecture Focus Questions:

Video/Demo††††††††††††††††††††††††††††††††††††††††††††††††††††††††† Time

10.8.1 Factors Affecting Wireless Communications 14:41
10.8.2 Troubleshooting Wireless Connections††† † ††† † 9:46

Total†††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††20:13

Lab/Activity