Do DNS/DHCP servers need a local replica?

The documentation seems to imply that they don't:

"Place the NetWare Core ProtocolTM (NCPTM) servers that will provide DCHP
service near the data to be updated and close to a writable partition. For
fast access and availability, a DHCP server should be on the same LAN as or
geographically close to the writable partitions the DHCP server uses."


We have a secondary DNS server running NAMED with non dns/dhcp related
problems and we want to remove the ds replicas as a troubleshooting
strategy. I just want to know if DNS will continue to work, or stop dead, or
be unreliable, or what?


Steve Law