Entity MIB sensor

The Entity MIB sensor can discover only known devices. It follows the standards that are documented in RFC 2737 to retrieve some of the physical configuration information for the device.

The Entity MIB sensor gathers the data that is shown in the PhysicalPackage tab of the Details pane. This data is used to store information about physical parts of the device such as slot, fan, physical frame, sensors, physical connectors, chassis, rack, and power supply.

The sensor queries the following OIDs:

.1.3.6.1.2.1.47.1.1.1.1.2, .1.3.6.1.2.1.47.1.1.1.1.3, .1.3.6.1.2.1.47.1.1.1.1.4,
.1.3.6.1.2.1.47.1.1.1.1.5, .1.3.6.1.2.1.47.1.1.1.1.6, .1.3.6.1.2.1.47.1.1.1.1.7,
.1.3.6.1.2.1.47.1.1.1.1.8, .1.3.6.1.2.1.47.1.1.1.1.9, .1.3.6.1.2.1.47.1.1.1.1.10,
.1.3.6.1.2.1.47.1.1.1.1.11, .1.3.6.1.2.1.47.1.1.1.1.12, .1.3.6.1.2.1.47.1.1.1.1.13.

The sensor also gathers .1.3.6.1.2.1.55.1.1.0., which contains IPv6 information according to RFC 2466. OID .1.3.6.1.2.1.17.4.3.1.1 returns a list of OIDs for known MAC addresses. These OIDs are then queried to determine the interface through which the MAC device can be accessed.

If the SNMP MIB2 sensor also runs, additional information is gathered and shown in the Router Details, Bridge Details, IP, and Ports tabs.

Sensor name that is used in the GUI and logs

EntityMIBSensor

Object identifiers (OIDs) that are used

The sensor uses the following OIDs:

  • .1.3.6.1.2.1.47.1.1.1.1.2
  • .1.3.6.1.2.1.47.1.1.1.1.3
  • .1.3.6.1.2.1.47.1.1.1.1.4
  • .1.3.6.1.2.1.47.1.1.1.1.5
  • .1.3.6.1.2.1.47.1.1.1.1.6
  • .1.3.6.1.2.1.47.1.1.1.1.7
  • .1.3.6.1.2.1.47.1.1.1.1.8
  • .1.3.6.1.2.1.47.1.1.1.1.9
  • .1.3.6.1.2.1.47.1.1.1.1.10
  • .1.3.6.1.2.1.47.1.1.1.1.11
  • .1.3.6.1.2.1.47.1.1.1.1.12
  • .1.3.6.1.2.1.47.1.1.1.1.13

The sensor queries OID .1.3.6.1.2.1.55.1.1.0. which contains the IPV6 information per RFC 2466. The sensor also queries OID .3.6.1.2.1.17.4.3.1.1. which returns a list containing OIDs for known MAC addresses. These OIDs are then queried to get the interface through which the MAC device can be accessed.

Model objects created

The sensor creates the following model objects:

  • phys.physconn.Slot
  • physconn.PhysicalConnector
  • physpkg.Chassis
  • physpkg.Fan
  • physpkg.PhysicalFrame
  • physpkg.PhysicalPackage
  • physpkg.otherPhysicalPackage
  • physpkg.PowerSupply
  • physpkg.Sensor
  • sys.ComputerSystem