NIS/RPCBind Conflict!

Hi I am trying to configure NIS client on my Ubuntu 12.04.
But I could not put portmap without uninstalling rpcbind.
Do I need to have rpcbind there on the server, or how can I have both portmap and rpcbind at same time there on the server, because it's having conflict.

Portmap is simply an open source implementation of the rpcbind protocols. If you have one then you don't need the other.