The Data Center Expert server can monitor APC, MGE, Modbus TCP, NetBotz, and third-party devices that it can discover on its public and private LANs.

• NetBotz Rack or Wall Appliances (except for 300, 303, 310, 400, and 410 models).
• Modbus TCP Output devices
• First generation power distribution units (PDUs) and AP76xx outlet strips, when discovered on the private LAN, only.

• Any APC or third-party device that can communicate with the server using SNMPv1 or SNMP v3 communication, with three levels of support provided.

  Basic SNMP support	Provides only Type (SNMP Device only), on-line or communication lost Status, Hostname, and Groups information.
  Model ID SNMP support	Reports Model information, in addition to the information provided for basic SNMP support.
  Full SNMP support	Provides sensor data and alarms information, in addition to the information provided for model ID SNMP support.

  Note: Additional sensors can be created on devices using Supplemental OIDs, an SNMP Device Communication Settings option in the Device menu.

Device Definition File (DDF)

DDF files include information on which sensors the Data Center Expert can report for SNMP and Modbus devices. The Data Center Expert server ships with the DDF files necessary for reporting sensors on all APC devices and some Modbus and third-party devices. In addition:

• DDF files, for third-party and Modbus devices, may be available from APC Technical support.
• You can use Device Definition Files, an SNMP Device Communication Settings and Modbus Device Communications Settings option in the Device menu, to check the APC website for new or updated DDFs, and download those files to the Data Center Expert server.
• APC SNMP devices that use a Network Management Card (NMC) version of 3xx or higher have a DDF file that the Data Center Expert must download at discovery time. This DDF file contains information about the alarm conditions the device can report.