Currently we are managing around 300 sites each hosting one 2012 R2 machine having the DNS server role installed.
All site-local clients are pointing to their respective site-local DNS servers. This servers, in turn, are configured as forwarders pointing to 2 out of 10 DCs (2012 R2 machines as well), which are hosted in a datacenter. We have only one single domain.
DNS utilization is not equally distributed/load balanced across DNS servers in the datacenter.
If I configure each site-local DNS forwarder to contain all DCs IP addresses (and not only two of them), will the site-local DNS forwarder load balance (in a round robin fassion) the queries towards the DCs? What other recommendations can you give to optimize DNS queries/WAN traffic in this situation? I hope you get my question.