You can target an SNMP agent to multiple WebLogic Server instances, however, each Managed Server can host only one SNMP agent. The Administration Server can host one server SNMP agent in addition to the domain-scoped SNMP agent.
If you target an agent to a Managed Server, the agent can gather data only from MBeans on the Managed Server. If you target an agent to the Administration Server, the agent can gather management data from MBeans throughout the domain. For more information, see Use SNMP to monitor WebLogic Server.
After you finish
If you targeted the agent to the Administration Server, then you must explicitly configure each monitor, attribute change, and log filter in the agent with the list of servers on which you want the monitor, attribute change, or log filter to be active. See: