Veritas Operations Manager uses Control Hosts as a discovery mechanism. A Control Host can be used to perform agentless discovery of a remote host. To perform agentless discovery, you must install the Control Host Add-on on one of the managed hosts. You can install the Control Host Add-on on Management Server, however it is not recommended as it puts extra load on Management Server.
Platform support for a host that can act as a Control Host is the same as that of Management Server.