Sun Management Center database can contain duplicate entries of hosts when one of the following scenarios occurs:
The IP address is changed after installation.
The host name is changed after installation.
The host name has multiple host aliases.
Workaround:
Follow these recommendations to avoid duplicate entries:
Do not use composite objects.
Do not use the subnet or IP address range discovery.
Ensure that the host name is available in the /var/opt/SUNWsymon/cfg/domain-config.x file on the agent machine before adding it to the topology.