Hi,
can't enter my NIS slave name into NIS?
is it NIS client/master?
while in master, during configuring the master, you have the option to setup the slave.
wherein you need to give ip and host name of the slave. at this time both ip and host name entry will be made in /etc/hosts file by the system.
In case of client, you have the option to bind to either slave or master using ypset(/etc/rc.config.d/namesvrs)
never give up