20.3.6 Packet Tracer – Use the ping Command Answers

20.3.6 Packet Tracer – Use the ping Command Answers

Objectives

Use the ping command to identify an incorrect configuration on a PC.

Background / Scenario

A small business owner learns that some users are unable to access a website. All PCs are configured with static IP addressing. Use the ping command to identify the issue.

Instructions

Part 1: Verify connectivity.

Access the Desktop tab > Web Browser of each PC and enter the URL www.cisco.pka. Identify any PCs that are not connecting to the web server.

Note: All the devices require time to complete the boot process. Please allow up to one minute before receiving a web response.

Which PCs are unable to connect to the web server?

PC2

Part 2: Ping the web server from PC with connectivity issues.

1. On the PC, access the Command Prompt from the Desktop tab.

2. At the prompt, enter ping www.cisco.pka.

Did the ping return a reply? What is the IP address displayed in the reply, if any?

There was no reply. No IP address was displayed in the message.

Part 3: Ping the web server from correctly configured PCs.

1. On the PC, access the Command Prompt from the Desktop tab.

2. At the prompt, enter ping www.cisco.pka.

Did the ping return a reply? What is the IP address returned, if any?

Reply was returned with 192.15.2.10 as the IP address for www.cisco.pka.

Part 4: Ping the IP address of the web server from PCs with connectivity issues.

1. On the PC, access the Command Prompt from the Desktop tab.

2. Attempt to reach the IP address of the web server with the ping command.

Did the ping return a reply? If so, then the PC can reach the web server via IP address, but not domain name. This could indicate a problem with the DNS server configuration on the PC.

Part 5: Compare the DNS server information on the PCs.

1. Access the Command Prompt of the PCs without any issues.

2. Using the command ipconfig /all, examine the DNS server configuration on the PCs without any issues.

3. Access the Command Prompt of the PCs with connectivity issues.

4. Using the command ipconfig /all, examine the DNS server configuration on the PCs with misconfigurations. Do the two configurations match?

Part 6: Make any necessary configuration changes on the PCs.

1. Navigate to the Desktop tab of the PCs with issues, make any necessary configuration changes in IP Configuration.

2. Using the Web Browser within the Desktop tab, connect to www.cisco.pka to verify that the configuration changes resolved the problem.


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