Beginning with OES 2018 SP1, Novell Business Continuity Cluster (BCC) is available as a pattern in the OES installation pattern list.
To download OES 23.4, go to Open Enterprise Server 23.4 and download the ISO files. Maintenance patches are available through the OES 23.4 patch channel.
See the OES 23.4: Installation Guide for information on installing, configuring, and updating (patching) OES 23.4. For OES 23.4 system requirements, see Preparing to Install OES 23.4
in the OES 23.4: Installation Guide.