❓👂 Question/Feedback - Deploy Application Gateway in a zone-redundant configuration

[junichi-tanaka]

Question/Feedback

This is about the rule of Deploy Application Gateway in a zone-redundant configuration.

https://learn.microsoft.com/azure/well-architected/services/networking/azure-application-gateway#reliability

Regarding this article, it says the following things.

After you deploy a new gateway by using the Azure portal, the portal or other tooling might indicate that the gateway isn't zone-redundant. However, if the gateway is deployed in a region that supports availability zones, it's guaranteed to be zone-redundant.

we recommend that you omit the zone list so that your gateway can use all of the availability zones, unless you have a specific reason not to use a specific zone.

So, I think current KQL is incorrect.
isnull(zones) is unnecessary anymore.

Possible Answers/Solutions?

• Recheck the current behavior of Application Gateway
• Update the KQL if needed