*** This bug has been marked as a duplicate of bug 2064 ***
Testing GlusterFS 3.1.1, we would like to set authentication of nfs. But both rewriting /etc/glusterd/nfs/nfs-server.vol and running gluster volume set <VOLNAME> <KEY> <VALUE> (gluster volume set distribute rpc-auth.addr.distribute.allow "172.16.*") ended in failure.