Once the NFS server is running, configure each machine in the cluster to mount /var/lib/enswitch. First, edit /etc/fstab and a line like (adjust IP address to suit):
192.168.1.1:/var/lib/enswitch /var/lib/enswitch nfs hard,bg,intr,noatime 0 0
Then:
- mount /var/lib/enswitch