You do not install any special software to configure a Failover System for Smarts version 9.3.
You need to install two Smarts IP domains, and two Smarts Service Assurance Manager (SAM) domains.
You also need one extra SAM domain to act as the fail over server.
The Smarts IP domains will act as a backup to each other, and the same with the SAM domains.
More detailed user instructions, along with install/configuration instructions can be found in this manual -
Smarts-Failover-System-9.2-User-Guide-.pdf