I'm hoping to start using clustered DNS for cPanel rather than setting up different nameservers for each new server. Is it possible to do this when I've already started using the following setup:
ns1/ns2 - server 1
ns3/ns4 - server 2
These servers have normal shared and reseller clients so if possible I'd prefer to have no downtime with IP changes etc. I'm not sure if I'd be able to run clustered DNS alongside normal for a while though.. Any suggestions on the best way to do this?