1532 - Obtaining a DHCP Address

Scenario

In this lab, you will work with a Windows client that currently has no DHCP lease. Your task is to manually obtain a DHCP lease for the client, providing it with a valid IP address from the DHCP server. This exercise will demonstrate using ipconfig commands to release and renew DHCP leases on a Windows system.

Estimate Completion Time

• 15 to 20 minutes

Course References

• 1310 What are DHCP Leases?

• 2310 Exploring DHCP Lease Timers and States

Lab Initiation

Access jump-desktop

Once the lab is deployed, you can access the virtual machines required to complete this lab activity. To initiate the lab, click on the jump-desktop tile and login to the Linux UI:

Username: training

Password: infoblox

Initiate lab

To initiate the lab, double-click the Launch Lab icon on the Desktop.

Choose the lab number from the list and click OK.

After clicking OK, you will see a pop-up message with a brief description of the lab task. If the description looks correct, click Yes to continue lab initiation.

Lab initiation will take a couple of minutes to finish.

Once complete, you will see another pop-up message with the login credentials and the URL for the Grid Manager’s User Interface. Note that the credentials may differ from those from prior labs.

Tasks

Log in to the VM testing-windows to complete the tasks below:

Task 1: Initial Client Status Check

Verify the current status of the Windows client’s IP settings using the ipconfig command.

Task 2: Request a DHCP Address

Use the ipconfig /renew command to obtain a new DHCP address for the Windows client. Then, use the ipconfig command to confirm the new IP address.

Task 3: Release the DHCP Address

Use the ipconfig /release command to release the DHCP address currently assigned to the Windows client. Then, use the ipconfig command to verify that the IP address has been released.

Solutions

Task 1 Solution: Initial Client Status Check

1. Log in to the VM testing-windows

2. Open Command Prompt

   • Open the Command Prompt by pressing Win + R, typing cmd, and pressing Enter.

3. Verify the Windows Client's Current IP Address

   • In the Command Prompt, type ipconfig and press the ENTER key.

   • Review the output for the current network configuration.

4. Expected Output

   • The output should display the current IP address. If the address is in the range 169.254.x.x, it indicates that the client does not have a DHCP lease.

     

Note: If an IP address is already assigned, run the following command to release the current IP configuration and ensure a fresh start: ipconfig /release

This will release the existing DHCP lease and allow you to obtain a new one in subsequent tasks.

Task 2 Solution: Request a DHCP Address

To request a new DHCP address:

1. Use the command ipconfig /renew and press ENTER in the Command Prompt.

2. This command requests a new IP address from the DHCP server.

3. After the process is complete, use the command ipconfig again to verify that the client has received a new IP address.

   

Note: The IP address shown in the screenshot may differ from the IP address that the DHCP server provides to the Windows client during this lab.

Task 3 Solution: Release the DHCP Address

To release the DHCP address:

1. Use the command ipconfig /release and press ENTER in the Command Prompt.

2. This command releases the currently assigned IP address, returning the client to a 169.254.x.x address.

3. Allow a minute for the IP address release process to complete and the network settings to update.

4. To confirm that the IP address has been released, use the command ipconfig again.