1513 - Creating DHCPv4 reservations in NIOS

Scenario

A systems developer has requested that you reserve the IP address 172.31.100.2 as a future secondary router’s IP address. She also requests that you block off the IP addresses 172.31.100.101 through 172.31.100.109 for “Project X”. Please make the necessary configurations in NIOS for her.

Estimate Completion Time

• 10 to 15 minutes

Credentials

Requirements

• Read-write access to DHCP reservations

• Read-write access to DHCP ranges

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: Creating a DHCPv4 reservation

Login to the GM web interface. Use global search to find the IPv4 address 172.31.100.2. While possible to add the reservation alongside other objects such as DNS entries, it is good to know if any objects are related to the same IPv4 address. Navigate to the parent DHCP network and create this as an IPv4 reservation.

Task 2: Creating a DHCPv4 reserved range

Login to the GM web interface. Create the reserved range 172.31.100.101 – 172.31.100.109, with the comment Project X.

This serves the purpose of reserving several IP addresses with one object. You could achieve the same by creating 9 separate DHCPv4 reservation objects.

Solutions

Task 1 Solution: Creating a DHCPv4 reservation

The use-case for this reservation is that this IP address is being reserved for future use, which means that the DHCP service will not be allocating this IP address to any client while the reservation still exists. A Fixed Address should not be used here because the address would be permanently bound to a MAC address.

To create a reservation,

1. Navigate to Data Management → DHCP → Networks
   

   

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

   

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

   

4. Here, we can see a pre-existing DHCP Range object 172.31.100.5-172.31.100.35. We can move on and create the reservation.

   

5. Click + from the dropdown and choose Reservation
   

   

6. Click Next for the first step of the Add IPv4 Reservation Wizard (no templates available in lab)

   

7. In step 2 provide the IP Address 172.31.100.2 which is to be reserved, along with a Name and an optional Comment about why this reservation was created. Once completed, click Save and Close
   

   

8. The reservation is now visible within 172.31.100.0/24 network

   

Task 2 Solution: Creating a DHCPv4 reserved range

Creating a Reserved Range is the same as creating any IPv4 DHCP Range, except that for a Reserved Range, we do not choose a member to serve the range.

To create a reserved range:

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 the existing DHCP Range object 172.31.100.5-172.31.100.35, as well as the reservation we just created

   

6. Click + from the dropdown and choose Range
   

   

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

   

8. In step 2 provide Start and End IP addresses along with a name for the range and an optional comment, then click Next
   

   

   
   

9. In Step 3, choose None(Reserved Range) for Served by and click Save and Close
   

   

   
   

10. We can now see the reserved range along with the other child objects of the 172.31.100.0/24 network