TCP Load Balancer

On of the requirements from the “Narrative” is to enable the frontend application in AWS to communicate with the backend application that is on-prem.

The frontend application makes use of DNS to determine the IP address of the backend application. In the on-prem environment the name “backend.example.local” resolves to the backend IP of 10.1.20.5.

In the AWS environment we want to resolve the name “backend.example.local” to resolve to the IP address of the F5 Distributed Cloud Customer Edge (CE). The CE will host a Virtual IP (VIP) that will host a TCP Load Balancer that will proxy traffic back to the original backend application.

Load Balancers

Next we will change to the “Load Balancers” menu.

Ensure that you are still in your assigned namespace.

Exercise 1: Origin Pool

1. Navigate the menu to go to Manage -> Load Balancer, then click Origin Pools.

   

2. Click the Add Origin Pool button.

   

3. Enter the following variables:

Variable	Value
Origin Pool Name	backend-tcp
Port	8443

1. Click on “Add Item” under “Origin Servers*”

2. Enter the following variables

Variable	Value
Select Type of Origin Server	IP address of Origin Server on given Sites
IP address	10.1.20.5
Site	Your UDF site
Select Network on the site	Inside Network

1. Under the List of Health Check(s) section, click on “Add Item”

2. Click the Select healthcheck dropdown.

3. Click the Create new Healthcheck button.

4. Enter the following variables:

Variable	Value
Name	backend-tcp-health-check
Health Check	TCP HealthCheck

1. Click on the “Configure” button to open the dialog to adjust timeout settings then click “Apply”

2. Click the Continue button to close the Health Check Parameters dialogue.

3. Click the Save and Exit button to close the Origin Pool dialogue.

Exercise 2: Create Backend TCP Load Balancer

1. Navigate the menu to go to Manage -> Load Balancer, then click TCP Load Balancers.

   

2. Click the Add TCP Load Balancer button.

3. Enter the following variables:

   Variable	Value
   Name	backend

4. Under “Domains” click on “Add item”

5. Enter the following variables:

   Variable	Value
   Domain	backend.example.local

6. After “Domains” enter the following variables

   Variable	Value
   Listen Port	9443
   Where to Advertise the VIP	Advertise Custom
   With SNI	Checked

7. Configure Origin Pools

   1. Under the Origin Pools section, click the Configure link.

   2. Click the Add item button.

   3. Select the backend-tcp pool.

   4. Click the Apply button to close the Origin Pools dialogue.

8. Configure Advertisement

   1. Under Advertise Custom click the Configure link.

   2. You will need to add a site:

      Variable	Value
      Select Where to Advertise	Site
      Site Network	Inside Network
      Site Reference	[unique name]-awsnet

      

   3. Click the Apply button to exit the Advertise Custom dialogue.

   

9. Click the Save and Exit button to exit the TCP Load Balancer dialogue.