Using Client Subnet in DNS Requests

BIG-IP DNS 14.0 now supports edns-client-subnet (ECS) for both responding to client requests (GSLB) or forwarding client requests (screening). The following is a quick start on using this feature. ...
Published Sep 14, 2018
Version 1.0
application delivery
BIG-IP DNS
Leonardo_Souza's avatar
Leonardo_Souza
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Jan 25, 2019

The information about Prefer Client Subnet as described in this article and help menus, was created with the topology in mind, but as indicated above, also applies to persistence.

 

Your conclusion is correct.

 

Also, just extra information, there is also a global setting for Prefer Client Subnet, besides the wide ip setting as you said.

 

(v14.1.0) DNS > Setting > GSLB > Load Balancing

 

In relation to windows server, I can't add anything helpful.