Sun Cluster HA for Tivoli is Tivoli components (the Tivoli Management Environment server, Tivoli managed nodes, and other components) made highly available by running under the control of Sun Cluster.
You can place Tivoli components inside or outside the Sun cluster; any components you place inside the cluster will be protected by failover. For example, if a Tivoli object dispatcher configured in the cluster fails, it will be restarted automatically or will fail over to another host.
For those Tivoli servers and managed nodes that you place inside the cluster, you must place each one on a separate logical host.