If you plan to target the SNMP agent that contains a gauge monitor to the Administration Server, specify which servers in the domain you want the monitor to observe.
If you target SNMP agents to individual Managed Servers, you do not need to specify which servers you want to monitor. An SNMP agent on a Managed Server monitors only its host Managed Server.
To target gauge monitors:
If you are configuring a monitor for a domain-wide resource, such as a file store, select the Administration Server.