[Users] Use Filer for NFS storage

Is there any way to use an existing Filer for the NFS storage? Or do I HAVE to use a host? We currently have a NetApp filer serving as our NFS server; I'd rather use that than create a new host and make it the NFS server (as it won't get backed up...would rather have it get backed up as the Filer already has that in place) --Christian