Creating a Round Robin DTC Policy in Universal DDI (2610)

Scenario

Your organization wants to publish a web application at www.dtc.techblue.net and distribute client requests across all application servers in both Pool A and Pool B. In this activity, you will configure a Round Robin load balancing policy so the LBDN can return balanced DNS answers across the two pools.

Estimated Completion Time

• 30 minutes

Prerequisites

• Administrative access to the Infoblox Portal

• Lab 2801: Deploying NIOS-X Servers

• Lab 2573: Configuring DNS Services in Universal DDI

• Lab 2574: Creating a DNS Primary Zone in Universal DDI

• Lab 2606: Creating a Primary Subzone for DTC in Universal DDI

• Lab 2607: Creating Core DTC Objects in Universal DDI

Learning Content

• Creating DNS Config Profiles

• Creating DNS Primary Zones

• Configuring Core DTC Objects in the Infoblox Portal

• Configuring DTC Policies in the Infoblox Portal

Tasks

1. Create the Round Robin policy.

2. Create the LBDN.

3. Test Round Robin behavior from the client side.

Task 1: Create the Round Robin policy

Create a policy that uses the Round Robin load balancing type and associates both pools so the DTC solution can distribute answers across them.

Task 2: Create the LBDN for the Round Robin policy

Create an LBDN for www.dtc.techblue.net and associate it to the Round Robin policy.

Task 3: Test Round Robin behavior from the client side.

Use oph3, jump-desktop, or testing-linux to test www.dtc.techblue.net and confirm that the answers rotate across all four application servers in both pools.

Solutions

Task 1 Solution: Create a Round Robin policy

This step applies traffic distribution logic to the pools you created. The policy is what tells DTC how to choose between the available pool resources when answering client queries.

1. Log in to your lab’s jump-desktop.

2. Use the Education Infoblox Portal credentials to sign in to the Infoblox Portal.

3. Navigate to Network → DNS.

4. Expand the DTC tab and select DTC Policies.

5. Click Create DTC Policy.
   

   

6. Create the first Policy using these values:
   Leave the State as Enabled.
   Enter the Name as Techblue Round Robin.
   Provide Description as Round Robin DTC Policy for Pools A and B.

   Leave the Load Balancing Type as Round Robin.
   

   

7. Click Next.

8. Click Add Pool and choose Pool A.
   

   

9. Click Add Pool again and choose Pool B and click Finish and then Save and Close.
   

   

Task 2 Solution: Create the LBDN for the Round Robin policy

This step creates the client-facing DNS name www.dtc.techblue.net that ties the DTC configuration together.

1. Log in to your lab’s jump-desktop.

2. Use the Education Infoblox Portal credentials to sign in to the Infoblox Portal.

3. Navigate to Network → DNS.

4. Expand the DTC tab and select LBDNs.

5. Click Create LBDN.
   

   

6. Create the LBDN using these values:
   For DNS View choose default.
   Enter the Name as www.dtc.techblue.net.
   Leave the Precedence field blank.
   For Load Balancing Policy choose Techblue Round Robin.
   For Description add Round Robin for webserver.
   

   

7. Click Save and Close.

Task 3 Solution: Test Round Robin behavior from the client side

This step validates that the policy is behaving the way it was designed. Because this is a Round Robin policy using both pools, repeated client queries should rotate across all four application server addresses regardless of which client machine is used.

1. Switch to virtual machine testing-linux and open a terminal window

2. Run dig @10.100.0.110 www.dtc.techblue.net. A +short
   

   

3. Repeat the query a few times and note the responses

4. Switch to virtual machine jump-desktop and open a terminal window
   

5. Run dig @10.100.0.110 www.dtc.techblue.net. A +short
   

   

6. Repeat the query a few times and note the responses

7. Switch to virtual machine oph3:
   username: training
   password: infoblox

8. Run dig @10.100.0.110 www.dtc.techblue.net. A +short
   

   

9. Repeat the query a few times and note the responses