VCS provides high availability to Logical Domains using I/O services from multiple I/O domains. When I/O services from the control domain and alternate I/O domain fail, VCS fails over the LDom from one system to another system. LDom continues to be functional on the same system and does not need a fail over if one of the I/O domain continues to provide service.

VCS uses service groups and resources to manage the storage and network services that are provided to a Logical Domain. These service groups are monitored by the AlternateIO resource. The AlternateIO service group provides the information about the state of the storage and network services to the LDom agent. VCS fails over the Logical Domain when services from both the I/O domains fail.

Perform the following tasks to configure VCS to manage a Logical Domain: