At a minimum, you must update the Oracle Solaris 11.3 OS with SRU2.
If you reinstall the OS, you might need to install certain package updates before you put the server and optional hardware or software components into production.
Install the most recent Oracle Solaris 11.3 SRU. Taking this action ensures that your server has the latest software for the best performance, security, and stability.
Use the pkg info entire command to display which SRU is currently installed on your server. Use the pkg command or the package manager GUI to download any available SRU.