I'm trying to export a traditional volume using NFS Server, but it fails to mount on an NFS Client even though showmount shows the export. Why ?

Explanation:  Traditional NetWare volumes are supported only over NFS protocol 2. So, even though showmount shows the volumes as exported, they are not mountable using NFS protocol 3.

Action:  You must explicitly mount the exported traditional volume specifying the NFS protocol version as 2.0

For example, the command to do this in some different UNIX flavors is as follows:

(In Solaris*)

mount -o vers=2 NwServer:/ExpClassicalVol /mntPoint

(In BSD)

mount_nfs -2 NwServer:/ExpClassicalVol /mntPoint

(In Linux*)

mount -o nfsvers=2 NwServer:/ExpClassicalVol /mntPoint

Action:  Alternately,

1. In SYS:ETC\NFSSERV.CFG, set NFS_VERSION = 2.

2. Unload and the reload nfsserv.

But in this case, NetWare NFS Server will export even NSS volumes only over NFS protocol 2, completely disabling NFS 3 protocol.