1512 - Creating DHCPv4 fixed addresses in NIOS

Scenario

A support engineer has requested to always receive the same IP address, 172.31.100.17. She has provided her MAC address 2C-7A-E9-93-68-03. Please make the necessary configurations in NIOS for this support engineer. You should first search to see if the MAC address of the support engineer’s device already exists in the Grid, then create a DHCPv4 fixed address if needed.

Estimate Completion Time

• 10 to 15 minutes

Credentials

Requirements

• Read-write access to DHCP fixed-address

Course References

• 1004: Managing NIOS DHCP objects

• 1008: Using NIOS IPAM and Global Search

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

Task 1: Searching for existing entries

Login to the GM web interface. Use global search to search for the MAC address 2C-7A-E9-93-68-03. While it is possible to have multiple fixed addresses with the same MAC address, this is a good practice to verify if there are older entries that need to be cleaned up before the current one is entered. 

Task 2: Creating a DHCPv4 fixed address

Login to the GM web interface. The user did not specify which network but they have provided an IPv4 address. A search for the IPv4 address 172.31.100.17 will reveal which IPv4 network it is a part of. Navigate to the IPv4 network, and create a fixed address with the MAC address 2C-7A-E9-93-68-03 and IP address 172.31.100.17.

Solutions

Task 1 Solution: Searching for existing entries

1. Login to NIOS GM web interface.

2. Navigate to Global Search → Advanced

3. Provide the MAC address as a search string then click Search for Type equals All
   

   

   

4. Here we see no information, indicating that the MAC address is not present in NIOS database
   

   

Now we can create DHCP fixed address to complete our support engineer’s request that she needs her client system to receive the same IP address from DHCP server. In this scenario, a reservation would be a bad choice, because once a reservation is created, DHCP server will not be able to allocate that IP address to any client, which also includes the client system of our support engineer.

Task 2 Solution: Creating a DHCPv4 fixed address

1. Login to NIOS GM web interface

2. Navigate to Data Management → DHCP → Networks
   

   

3. In the Go to field, type in 172.31.100.0 and click on the first match
   

   

4. Open the network object 172.31.100.0/24 by clicking on Open (→)
   

   

5. Here, we can see a DHCP Range object 172.31.100.5-172.31.100.35
   

   

6. We can create the Fixed Address within this range. Click + from the dropdown and choose Fixed Address
   

   

7. Click Next for the first step of Add IPv4 Fixed Address Wizard (no templates available in lab)

   

8. In step 2, provide the IP address 172.31.100.17. In the Assign IP Address by field, choose MAC Address and provide 2C:7A:E9:93:68:03

   

9. Click Save and Close to finish creating the Fixed Address object