When I try to execute New-AzureRmApplicationGatewayIPConfiguration to create an application gateway, I get an exception:
Subnet xxx cannot be used for application gateway yyy since subnet is not empty.
I encountered this error when I tried to add the application gateway to the same subnet as the backend servers.
Why is this not an option? Does each gateway require a separate subnet? What is the recommended configuration?
Related questions:
- The documentation says backend servers can be added when they belong to the virtual network subnet. How can a back-end server belong to the virtual network subnet of the application gateway if the application gateway must be in a separate subnet?
- How can the application gateway be configured without requiring a public IP address on the backend servers?