The root domain must already be configured (see Chapter 5, Setting Up the NIS+ Root Domain).
The server must have already been initialized as an NIS+ client (see Chapter 6, Configuring NIS+ Clients).
To configure a server you must be logged in as superuser on that machine.
For the server to run in NIS-compatibility mode and support DNS forwarding, it must have a properly configured /etc/resolv.conf file.