Not sure if I understood it correctly , but why would a static IP address be not supported in an application gateway. Isn't that a constraint on it ?
2 Answers
Static IP is already supported. The Application Gateway v2 SKU supports static public IP addresses. The v1 SKU supports static internal IPs. https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-faq
why would a static IP address be not supported in an application gateway
Application Gateway does not support static public IP addresses, but it does support static internal IPs. Also, the Dynamic IP of Application Gateway does not change on a running gateway. It is changed only when you stop or start the Gateway. It does not change on system failures, OS updates, Azure host updates etc. More details from this.
Isn't that a constraint on it?
For more details, you can refer to overcome the limitation of Application Gateway in assigning Static IP