rfc2037.txt

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    ::= { entityGroups 3 }

entityGeneralGroup    OBJECT-GROUP
    OBJECTS {
              entLastChangeTime
            }
    STATUS  current
    DESCRIPTION
            "The collection of objects which are used to represent
            general entity information for which a single agent provides
            management information."
    ::= { entityGroups 4 }

entityNotificationsGroup NOTIFICATION-GROUP
    NOTIFICATIONS { entConfigChange }
    STATUS        current
    DESCRIPTION
            "The collection of notifications used to indicate Entity MIB
            data consistency and general status information."
    ::= { entityGroups 5 }


END


















McCloghrie & Bierman        Standards Track                    [Page 25]

RFC 2037                 Entity MIB using SMIv2             October 1996


5.  Usage Examples

   The following sections iterate the instance values for two example
   networking devices. These examples are kept simple to make them more
   understandable. Auxiliary components, such as fans, sensors, empty
   slots, and sub-modules are not shown, but might be modeled in real
   implementations.

5.1.  Router/Bridge

   A router containing two slots.  Each slot contains a 3 port
   router/bridge module. Each port is represented in the ifTable.  There
   are two logical instances of OSPF running and two logical bridges:

  Physical entities -- entPhysicalTable:
    1 Field-replaceable physical chassis:
      entPhysicalDescr.1 ==             "Acme Chassis Model 100"
      entPhysicalVendorType.1  ==       acmeProducts.chassisTypes.1
      entPhysicalContainedIn.1 ==       0
      entPhysicalClass.1 ==             chassis(3)
      entPhysicalParentRelPos.1 ==      0
      entPhysicalName.1 ==              '100-A'

    2 slots within the chassis:
      entPhysicalDescr.2 ==             "Acme Chassis Slot Type AA"
      entPhysicalVendorType.2  ==       acmeProducts.slotTypes.1
      entPhysicalContainedIn.2 ==       1
      entPhysicalClass.2 ==             container(5)
      entPhysicalParentRelPos.2 ==      1
      entPhysicalName.2 ==              'S1'

      entPhysicalDescr.3 ==             "Acme Chassis Slot Type AA"
      entPhysicalVendorType.3  ==       acmeProducts.slotTypes.1
      entPhysicalContainedIn.3 ==       1
      entPhysicalClass.3 ==             container(5)
      entPhysicalParentRelPos.3 ==      2
      entPhysicalName.3 ==              'S2'

    2 Field-replaceable modules:
    Slot 1 contains a module with 3 ports:
      entPhysicalDescr.4 ==             "Acme Router-100"
      entPhysicalVendorType.4  ==       acmeProducts.moduleTypes.14
      entPhysicalContainedIn.4 ==       2
      entPhysicalClass.4 ==             module(9)
      entPhysicalParentRelPos.4 ==      1
      entPhysicalName.4 ==              'M1'

      entPhysicalDescr.5 ==             "Acme Ethernet-100 Port Rev G"



McCloghrie & Bierman        Standards Track                    [Page 26]

RFC 2037                 Entity MIB using SMIv2             October 1996


      entPhysicalVendorType.5  ==       acmeProducts.portTypes.2
      entPhysicalContainedIn.5 ==       4
      entPhysicalClass.5 ==             port(10)
      entPhysicalParentRelPos.5 ==      1
      entPhysicalName.5 ==              'P1'

      entPhysicalDescr.6 ==             "Acme Ethernet-100 Port Rev G"
      entPhysicalVendorType.6  ==       acmeProducts.portTypes.2
      entPhysicalContainedIn.6 ==       4
      entPhysicalClass.6 ==             port(10)
      entPhysicalParentRelPos.6 ==      2
      entPhysicalName.6 ==              'P2'

      entPhysicalDescr.7 ==             "Acme Router-100 F-Port: Rev B"
      entPhysicalVendorType.7  ==       acmeProducts.portTypes.3
      entPhysicalContainedIn.7 ==       4
      entPhysicalClass.7 ==             port(10)
      entPhysicalParentRelPos.7 ==      3
      entPhysicalName.7 ==              'P3'

   Slot 2 contains another 3-port module:
      entPhysicalDescr.8 ==             "Acme Router-100 Comm Module: Rev C"
      entPhysicalVendorType.8  ==       acmeProducts.moduleTypes.15
      entPhysicalContainedIn.8 ==       3
      entPhysicalClass.8 ==             module(9)
      entPhysicalParentRelPos.8 ==      1
      entPhysicalName.8 ==              'M2'

      entPhysicalDescr.9 ==             "Acme Fddi-100 Port Rev CC"
      entPhysicalVendorType.9 ==        acmeProducts.portTypes.5
      entPhysicalContainedIn.9 ==       8
      entPhysicalClass.9 ==             port(10)
      entPhysicalParentRelPos.9 ==      1
      entPhysicalName.9 ==              'FDDI Primary'

      entPhysicalDescr.10 ==            "Acme Ethernet-100 Port Rev G"
      entPhysicalVendorType.10 ==       acmeProducts.portTypes.2
      entPhysicalContainedIn.10 ==      8
      entPhysicalClass.10 ==            port(10)
      entPhysicalParentRelPos.10 ==     2
      entPhysicalName.10 ==             'Ethernet A'

      entPhysicalDescr.11 ==            "Acme Ethernet-100 Port Rev G"
      entPhysicalVendorType.11 ==       acmeProducts.portTypes.2
      entPhysicalContainedIn.11 ==      8
      entPhysicalClass.11 ==            port(10)
      entPhysicalParentRelPos.11 ==     3
      entPhysicalName.11 ==             'Ethernet B'



McCloghrie & Bierman        Standards Track                    [Page 27]

RFC 2037                 Entity MIB using SMIv2             October 1996


   Logical entities -- entLogicalTable
    2 OSPF instances:
      entLogicalDescr.1 ==            "Acme OSPF v1.1"
      entLogicalType.1 ==             ospf
      entLogicalCommunity.1 ==        "public-ospf1"
      entLogicalTAddress.1 ==         124.125.126.127:161
      entLogicalTDomain.1 ==          snmpUDPDomain

      entLogicalDescr.2 ==            "Acme OSPF v1.1"
      entLogicalType.2 ==             ospf
      entLogicalCommunity.2 ==        "public-ospf2"
      entLogicalTAddress.2 ==         124.125.126.127:161
      entLogicalTDomain.2 ==          snmpUDPDomain

    2 logical bridges:
      entLogicalDescr.3 ==            "Acme Bridge v2.1.1"
      entLogicalType.3  ==            dod1dBridge
      entLogicalCommunity.3 ==        "public-bridge1"
      entLogicalTAddress.3 ==         124.125.126.127:161
      entLogicalTDomain.3 ==          snmpUDPDomain

      entLogicalDescr.4 ==            "Acme Bridge v2.1.1"
      entLogicalType.4 ==             dod1dBridge
      entLogicalCommunity.4 ==        "public-bridge2"
      entLogicalTAddress.4 ==         124.125.126.127:161
      entLogicalTDomain.4 ==          snmpUDPDomain

Logical to Physical Mappings:
  1st OSPF instance: uses module 1-port 1
      entLPPhysicalIndex.1.5 ==         5

  2nd OSPF instance: uses module 2-port 1
      entLPPhysicalIndex.2.9 ==         9

  1st bridge group: uses module 1, all ports

  [ed. -- Note that these mappings are included in the table since
  another logical entity (1st OSPF) utilizes one of the
  ports. If this were not the case, then a single mapping
  to the module (e.g. entLPPhysicalIndex.3.4) would be
  present instead. ]
      entLPPhysicalIndex.3.5 ==         5
      entLPPhysicalIndex.3.6 ==         6
      entLPPhysicalIndex.3.7 ==         7

  2nd bridge group: uses module 2, all ports
      entLPPhysicalIndex.4.9  ==        9
      entLPPhysicalIndex.4.10 ==        10



McCloghrie & Bierman        Standards Track                    [Page 28]

RFC 2037                 Entity MIB using SMIv2             October 1996


      entLPPhysicalIndex.4.11 ==        11

Physical to Logical to MIB Alias Mappings -- entAliasMappingTable:
  Example 1: ifIndex values are global to all logical entities
      entAliasMappingIdentifier.5.0   ==        ifIndex.1
      entAliasMappingIdentifier.6.0   ==        ifIndex.2
      entAliasMappingIdentifier.7.0   ==        ifIndex.3
      entAliasMappingIdentifier.9.0   ==        ifIndex.4
      entAliasMappingIdentifier.10.0  ==        ifIndex.5
      entAliasMappingIdentifier.11.0  ==        ifIndex.6

  Example 2: ifIndex values are not shared by all logical entities
      entAliasMappingIdentifier.5.0   ==        ifIndex.1
      entAliasMappingIdentifier.5.3   ==        ifIndex.101
      entAliasMappingIdentifier.6.0   ==        ifIndex.2
      entAliasMappingIdentifier.6.3   ==        ifIndex.102
      entAliasMappingIdentifier.7.0   ==        ifIndex.3
      entAliasMappingIdentifier.7.3   ==        ifIndex.103
      entAliasMappingIdentifier.9.0   ==        ifIndex.4
      entAliasMappingIdentifier.9.3   ==        ifIndex.204
      entAliasMappingIdentifier.10.0  ==        ifIndex.5
      entAliasMappingIdentifier.10.3  ==        ifIndex.205
      entAliasMappingIdentifier.11.0  ==        ifIndex.6
      entAliasMappingIdentifier.11.3  ==        ifIndex.206

Physical Containment Tree -- entPhysicalContainsTable
  chassis has two containers:
      entPhysicalChildIndex.1.2 = 2
      entPhysicalChildIndex.1.3 = 3

  container 1 has a module:
      entPhysicalChildIndex.2.4 = 4

  container 2 has a module:
      entPhysicalChildIndex.3.8 = 8

  module 1 has 3 ports:
      entPhysicalChildIndex.4.5 = 5
      entPhysicalChildIndex.4.6 = 6
      entPhysicalChildIndex.4.7 = 7

  module 2 has 3 ports:
      entPhysicalChildIndex.8.9 = 9
      entPhysicalChildIndex.8.10 = 10
      entPhysicalChildIndex.1.11 = 11






McCloghrie & Bierman        Standards Track                    [Page 29]

RFC 2037                 Entity MIB using SMIv2             October 1996


5.2.  Repeaters

   A 3-slot Hub with 2 backplane ethernet segments.  Slot three is
   empty, and the remaining slots contain ethernet repeater modules.
   [ed. -- Note that a replacement for the current Repeater MIB (RFC
   1516) is likely to emerge soon, and it will no longer be necessary to
   access repeater MIB data in different naming scopes.]

Physical entities -- entPhysicalTable:
   1 Field-replaceable physical chassis:
      entPhysicalDescr.1 ==          "Acme Chassis Model 110"
      entPhysicalVendorType.1 ==     acmeProducts.chassisTypes.2
      entPhysicalContainedIn.1 ==    0
      entPhysicalClass.1 ==          chassis(3)
      entPhysicalParentRelPos.1 ==   0
      entPhysicalName.1 ==           '110-B'

   2 Chassis Ethernet Backplanes:
      entPhysicalDescr.2 ==          "Acme Ethernet Backplane Type A"
      entPhysicalVendorType.2 ==     acmeProducts.backplaneTypes.1
      entPhysicalContainedIn.2 ==    1
      entPhysicalClass.2 ==          backplane(4)
      entPhysicalParentRelPos.2 ==   1
      entPhysicalName.2 ==           'B1'

      entPhysicalDescr.3 ==          "Acme Ethernet Backplane Type A"
      entPhysicalVendorType.3  ==    acmeProducts.backplaneTypes.1
      entPhysicalContainedIn.3 ==    1
      entPhysicalClass.3 ==          backplane(4)
      entPhysicalParentRelPos.3 ==   2
      entPhysicalName.3 ==           'B2'

   3 slots within the chassis:
      entPhysicalDescr.4 ==          "Acme Hub Slot Type RB"
      entPhysicalVendorType.4  ==    acmeProducts.slotTypes.5
      entPhysicalContainedIn.4 ==    1
      entPhysicalClass.4 ==          container(5)
      entPhysicalParentRelPos.4 ==   1
      entPhysicalName.4 ==           'Slot 1'

      entPhysicalDescr.5 ==          "Acme Hub Slot Type RB"
      entPhysicalVendorType.5  ==    acmeProducts.slotTypes.5
      entPhysicalContainedIn.5 ==    1
      entPhysicalClass.5 ==          container(5)
      entPhysicalParentRelPos.5 ==   2
      entPhysicalName.5 ==           'Slot 2'

      entPhysicalDescr.6 ==          "Acme Hub Slot Type RB"



McCloghrie & Bierman        Standards Track                    [Page 30]

RFC 2037                 Entity MIB using SMIv2             October 1996


      entPhysicalVendorType.6  ==    acmeProducts.slotTypes.5
      entPhysicalContainedIn.6 ==    1
      entPhysicalClass.6 ==          container(5)
      entPhysicalParentRelPos.6 ==   3
      entPhysicalName.6 ==           'Slot 3'

   Slot 1 contains a plug-in module with 4 10-BaseT ports:
      entPhysicalDescr.7  ==         "Acme 10Base-T Module 114 Rev A"
      entPhysicalVendorType.7   ==   acmeProducts.moduleTypes.32
      entPhysicalContainedIn.7  ==   4
      ent