nixCraft posted a guide about setting up a NFS v4.0 file server under CentOS / RHEL v5.x
How do I setup NFS v4.0 distributed file system access server under CentOS / RHEL v5.x for sharing files with UNIX and Linux workstations? How to export a directory with NFSv4? How to mount a directory with NFSv4?CentOS / Redhat: Setup NFS v4.0 File Server