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virtual-network-create-udr-scenario-include.md

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Scenario

To better illustrate how to create UDRs, this document will use the scenario below.

IMAGE DESCRIPTION

In this scenario you will create one UDR for the Front end subnet and another UDR for the Back end subnet , as described below:

  • UDR-FrontEnd. The front end UDR will be applied to the FrontEnd subnet, and contain one route:
    • RouteToBackend. This route will send all traffic to the back end subnet to the FW1 virtual machine.
  • UDR-BackEnd. The back end UDR will be applied to the BackEnd subnet, and contain one route:
    • RouteToFrontend. This route will send all traffic to the front end subnet to the FW1 virtual machine.

The combination of these routes will ensure that all traffic destined from one subnet to another will be routed to the FW1 virtual machine, which is being used as a virtual appliance. You also need to turn on IP forwarding for that VM, to ensure it can receive traffic destined to other VMs.