I am using the fedora core 3 ,while i configuring the NIS server i gave the commannd /usr/lib/yp/ypinit -m and add a host name . After executing this i got the error like the following

Updating passwd.byname...
failed to send 'clear' to local ypserv: RPC: Unknown hostUpdating passwd.byuid...
failed to send 'clear' to local ypserv: RPC: Unknown hostUpdating group.byname...
failed to send 'clear' to local ypserv: RPC: Unknown hostUpdating group.bygid...
failed to send 'clear' to local ypserv: RPC: Unknown hostUpdating hosts.byname...
failed to send 'clear' to local ypserv: RPC: Unknown hostUpdating hosts.byaddr...
failed to send 'clear' to local ypserv: RPC: Unknown hostUpdating rpc.byname...
failed to send 'clear' to local ypserv: RPC: Unknown hostUpdating rpc.bynumber...
failed to send 'clear' to local ypserv: RPC: Unknown hostUpdating services.byname...
failed to send 'clear' to local ypserv: RPC: Unknown hostUpdating services.byservicename...
failed to send 'clear' to local ypserv: RPC: Unknown hostUpdating netid.byname...
failed to send 'clear' to local ypserv: RPC: Unknown hostUpdating protocols.bynumber...
failed to send 'clear' to local ypserv: RPC: Unknown hostUpdating protocols.byname...
failed to send 'clear' to local ypserv: RPC: Unknown hostUpdating mail.aliases...
failed to send 'clear' to local ypserv: RPC: Unknown hostgmake[1]: Leaving directory `/var/yp/COOL-NETWORK'

Here COOL-NETWORK is my domain name.

and it not ok till now

you need to outline the steps you have taken on both master and slave servers. then we can see where things went wrong