DFS is delivered as part of the Novell Storage Services (novell-nss) userspace package on OES 2015 or later. NSS must be installed and enabled on VLDB replica servers for the DFS management context and on any server where you want to create junctions.
For OES 2015 SP1, in the YaST install, use the Software Selection and Systems Tasks menu to select Novell Storage Services from the OES Services menu. This choice automatically selects these additional OES services that are used by DFS:
Novell Storage Services
Novell Backup/Storage Management Services (SMS)
Novell eDirectory
Novell Linux User Management