Over the past few months, we announced the support for Geographic Traffic Routing, Fast failover, and TCP probing using Azure Traffic Manager. It is our constant endeavor to add new capabilities that add value to our customers. Today, we are excited to announce the support for EDNS Client Subnet (ECS) in Azure Traffic Manager.
When customers choose to use Performance or Geographic routing methods with Azure Traffic Manager, the routing decision made depends on the origin of the Domain Name System (DNS) request. Azure Traffic Manager determines the request origin region by inspecting the source IP address of the query, which in most cases will be the IP address of the local DNS resolver that does the recursive DNS lookup on behalf of the end user.
Read about it in the Azure blog.