Here's the goal I'm trying to achieve with Bind9:
Master Zones: domain.com, sitea.domain.com
Slaves Zones: siteb.domain.com
Master Zones: siteb.domain.com
Slaves Zones: domain.com
All hosts in both sites will do dynamic updates (host.sitea.domain.com). The master zone "domain.com" will host static records.
I want users to be able to access server.domain.com but I will need to be able to access host.sitea.domain.com.