Does enabling http2 on application gateway allow http1.1

@Godley, Philip

Thank you for reaching out.

Does enabling http2 on the application gateway still allow incoming communication on http1.1?

Azure Application Gateway accepts inbound connections over HTTP/2, HTTP/1.1 protocols by default.

The option of enabling HTTP/2 enables communication to backend server pools from Azure Application Gateway over HTTP/2 (HTTP/1.1 is default as pointed in Babafemi's response above). Your backend application should support HTTP/2 protocol when this option is enabled.

Hope this helps! Please let me know if you have any questions. Thank you!

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Hello Godley, Philip,

Thank you for posting this in the Microsoft Q&A Community

From my understanding, you would like to know if enabling http/2 on the application gateway allows communication on HTTP/1.1.

Please be informed that communication to backend server pools is always HTTP/1.1 regardless of the protocol enabled.

Follow this Link to get more information about this

https://learn.microsoft.com/en-us/azure/application-gateway/configuration-listeners#additional-protocol-support

Let me know if further assistance is required.

Babafemi