Adding a DC and disallowing client connections to it while it's being "rebuilt"

[Voytek Jarnot]

In reading this doc on adding a datacenter, 

https://docs.datastax.com/en/cassandra/3.0/cassandra/operations/opsAddDCToCluster.html

I get the impression that DC-aware clients will not hit the "remote" DC - is that the case for the Java driver? We don't currently explicitly set PoolingOptions ConnectionsPerHost for HostDistance.REMOTE to 0 - seems like that would be an important thing to do?

Thank you.