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RFC 4133

 
 
 

Entity MIB (Version 3)

Part 3 of 3, p. 44 to 62
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prevText      Top      Up      ToC       Page 44 
4.  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.

4.1.  Router/Bridge

   The first example is 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'
         entPhysicalHardwareRev.1 ==       'A(1.00.02)'
         entPhysicalSoftwareRev.1 ==       ''
         entPhysicalFirmwareRev.1 ==       ''
         entPhysicalSerialNum.1 ==         'C100076544'
         entPhysicalMfgName.1 ==           'Acme'
         entPhysicalModelName.1 ==         '100'
         entPhysicalAlias.1 ==             'cl-SJ17-3-006:rack1:rtr-U3'
         entPhysicalAssetID.1 ==           '0007372293'
         entPhysicalIsFRU.1 ==             true(1)
         entPhysicalMfgDate.1 ==           '2002-5-26,13:30:30.0,-4:0'
         entPhysicalUris.1 ==              'URN:CLEI:CNME120ARA'
       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'
         entPhysicalHardwareRev.2 ==       'B(1.00.01)'
         entPhysicalSoftwareRev.2 ==       ''
         entPhysicalFirmwareRev.2 ==       ''
         entPhysicalSerialNum.2 ==         ''
         entPhysicalMfgName.2 ==           'Acme'
         entPhysicalModelName.2 ==         'AA'
         entPhysicalAlias.2 ==             ''

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         entPhysicalAssetID.2 ==           ''
         entPhysicalIsFRU.2 ==             false(2)
         entPhysicalMfgDate.2 ==           '2002-7-26,12:22:12.0,-4:0'
         entPhysicalUris.2 ==              'URN:CLEI:CNME123ARA'

         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'
         entPhysicalHardwareRev.3 ==       '1.00.07'
         entPhysicalSoftwareRev.3 ==       ''
         entPhysicalFirmwareRev.3 ==       ''
         entPhysicalSerialNum.3 ==         ''
         entPhysicalMfgName.3 ==           'Acme'
         entPhysicalModelName.3 ==         'AA'
         entPhysicalAlias.3 ==             ''
         entPhysicalAssetID.3 ==           ''
         entPhysicalIsFRU.3 ==             false(2)
         entPhysicalMfgDate.3 ==           '2002-7-26,12:12:12.0,-4:0'
         entPhysicalUris.3 ==              'URN:CLEI:CNME123ARA'

       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'
         entPhysicalHardwareRev.4 ==       '1.00.07'
         entPhysicalSoftwareRev.4 ==       '1.4.1'
         entPhysicalFirmwareRev.4 ==       'A(1.1)'
         entPhysicalSerialNum.4 ==         'C100087363'
         entPhysicalMfgName.4 ==           'Acme'
         entPhysicalModelName.4 ==         'R100-FE'
         entPhysicalAlias.4 ==             'rtr-U3:m1:SJ17-3-eng'
         entPhysicalAssetID.4 ==           '0007372462'
         entPhysicalIsFRU.4 ==             true(1)
         entPhysicalMfgDate.4 ==           '2003-7-18,13:30:30.0,-4:0'
         entPhysicalUris.4 ==              'URN:CLEI:CNRU123CAA'

         entPhysicalDescr.5 ==             'Acme Ethernet-100 Port'
         entPhysicalVendorType.5  ==       acmeProducts.portTypes.2
         entPhysicalContainedIn.5 ==       4
         entPhysicalClass.5 ==             port(10)
         entPhysicalParentRelPos.5 ==      1

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         entPhysicalName.5 ==              'P1'
         entPhysicalHardwareRev.5 ==       'G(1.02)'
         entPhysicalSoftwareRev.5 ==       ''
         entPhysicalFirmwareRev.5 ==       '1.1'
         entPhysicalSerialNum.5 ==         ''
         entPhysicalMfgName.5 ==           'Acme'
         entPhysicalModelName.5 ==         'FE-100'
         entPhysicalAlias.5 ==             ''
         entPhysicalAssetID.5 ==           ''
         entPhysicalIsFRU.5 ==             false(2)
         entPhysicalMfgDate.5 ==           '2003-7-18,14:20:22.0,-4:0'
         entPhysicalUris.5 ==              'URN:CLEI:CNMES23ARA'

         entPhysicalDescr.6 ==             'Acme Ethernet-100 Port'
         entPhysicalVendorType.6  ==       acmeProducts.portTypes.2
         entPhysicalContainedIn.6 ==       4
         entPhysicalClass.6 ==             port(10)
         entPhysicalParentRelPos.6 ==      2
         entPhysicalName.6 ==              'P2'
         entPhysicalHardwareRev.6 ==       'G(1.02)'
         entPhysicalSoftwareRev.6 ==       ''
         entPhysicalFirmwareRev.6 ==       '1.1'
         entPhysicalSerialNum.6 ==         ''
         entPhysicalMfgName.6 ==           'Acme'
         entPhysicalModelName.6 ==         'FE-100'
         entPhysicalAlias.6 ==             ''
         entPhysicalAssetID.6 ==           ''
         entPhysicalIsFRU.6 ==             false(2)
         entPhysicalMfgDate.6 ==           '2003-7-19,10:15:15.0,-4:0'
         entPhysicalUris.6 ==              'URN:CLEI:CNMES23ARA'

         entPhysicalDescr.7 ==             'Acme Router-100 FDDI-Port'
         entPhysicalVendorType.7  ==       acmeProducts.portTypes.3
         entPhysicalContainedIn.7 ==       4
         entPhysicalClass.7 ==             port(10)
         entPhysicalParentRelPos.7 ==      3
         entPhysicalName.7 ==              'P3'
         entPhysicalHardwareRev.7 ==       'B(1.03)'
         entPhysicalSoftwareRev.7 ==       '2.5.1'
         entPhysicalFirmwareRev.7 ==       '2.5F'
         entPhysicalSerialNum.7 ==         ''
         entPhysicalMfgName.7 ==           'Acme'
         entPhysicalModelName.7 ==         'FDDI-100'
         entPhysicalAlias.7 ==             ''
         entPhysicalAssetID.7 ==           ''
         entPhysicalIsFRU.7 ==             false(2)

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      Slot 2 contains another 3-port module:
         entPhysicalDescr.8 ==             'Acme Router-100 Comm Module'
         entPhysicalVendorType.8  ==       acmeProducts.moduleTypes.15
         entPhysicalContainedIn.8 ==       3
         entPhysicalClass.8 ==             module(9)
         entPhysicalParentRelPos.8 ==      1
         entPhysicalName.8 ==              'M2'
         entPhysicalHardwareRev.8 ==       '2.01.00'
         entPhysicalSoftwareRev.8 ==       '3.0.7'
         entPhysicalFirmwareRev.8 ==       'A(1.2)'
         entPhysicalSerialNum.8 ==         'C100098732'
         entPhysicalMfgName.8 ==           'Acme'
         entPhysicalModelName.8 ==         'C100'
         entPhysicalAlias.8 ==             'rtr-U3:m2:SJ17-2-eng'
         entPhysicalAssetID.8 ==           '0007373982'
         entPhysicalIsFRU.8 ==             true(1)
         entPhysicalMfgDate.8 ==           '2002-5-26,13:30:15.0,-4:0'
         entPhysicalUris.8 ==              'URN:CLEI:CNRT321MAA'

         entPhysicalDescr.9 ==             'Acme Fddi-100 Port'
         entPhysicalVendorType.9 ==        acmeProducts.portTypes.5
         entPhysicalContainedIn.9 ==       8
         entPhysicalClass.9 ==             port(10)
         entPhysicalParentRelPos.9 ==      1
         entPhysicalName.9 ==              'FDDI Primary'
         entPhysicalHardwareRev.9 ==       'CC(1.07)'
         entPhysicalSoftwareRev.9 ==       '2.0.34'
         entPhysicalFirmwareRev.9 ==       '1.1'
         entPhysicalSerialNum.9 ==         ''
         entPhysicalMfgName.9 ==           'Acme'
         entPhysicalModelName.9 ==         'FDDI-100'
         entPhysicalAlias.9 ==             ''
         entPhysicalAssetID.9 ==           ''
         entPhysicalIsFRU.9 ==             false(2)

         entPhysicalDescr.10 ==            'Acme Ethernet-100 Port'
         entPhysicalVendorType.10 ==       acmeProducts.portTypes.2
         entPhysicalContainedIn.10 ==      8
         entPhysicalClass.10 ==            port(10)
         entPhysicalParentRelPos.10 ==     2
         entPhysicalName.10 ==             'Ethernet A'
         entPhysicalHardwareRev.10 ==      'G(1.04)'
         entPhysicalSoftwareRev.10 ==      ''
         entPhysicalFirmwareRev.10 ==      '1.3'
         entPhysicalSerialNum.10 ==        ''
         entPhysicalMfgName.10 ==          'Acme'
         entPhysicalModelName.10 ==        'FE-100'
         entPhysicalAlias.10 ==            ''

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         entPhysicalAssetID.10 ==          ''
         entPhysicalIsFRU.10 ==            false(2)
         entPhysicalMfgDate.10 ==          '2002-7-26,13:30:15.0,-4:0'
         entPhysicalUris.10 ==             'URN:CLEI:CNMES23ARA'

         entPhysicalDescr.11 ==            'Acme Ethernet-100 Port'
         entPhysicalVendorType.11 ==       acmeProducts.portTypes.2
         entPhysicalContainedIn.11 ==      8
         entPhysicalClass.11 ==            port(10)
         entPhysicalParentRelPos.11 ==     3
         entPhysicalName.11 ==             'Ethernet B'
         entPhysicalHardwareRev.11 ==      'G(1.04)'
         entPhysicalSoftwareRev.11 ==      ''
         entPhysicalFirmwareRev.11 ==      '1.3'
         entPhysicalSerialNum.11 ==        ''
         entPhysicalMfgName.11 ==          'Acme'
         entPhysicalModelName.11 ==        'FE-100'
         entPhysicalAlias.11 ==            ''
         entPhysicalAssetID.11 ==          ''
         entPhysicalIsFRU.11 ==            false(2)
         entPhysicalMfgDate.11 ==          '2002-8-16,15:35:15.0,-4:0'
         entPhysicalUris.11 ==             'URN:CLEI:CNMES23ARA'

      Logical entities -- entLogicalTable; no SNMPv3 support
       2 OSPF instances:
         entLogicalDescr.1 ==              'Acme OSPF v1.1'
         entLogicalType.1 ==               ospf
         entLogicalCommunity.1 ==          'public-ospf1'
         entLogicalTAddress.1 ==           192.0.2.1:161
         entLogicalTDomain.1 ==            snmpUDPDomain
         entLogicalContextEngineID.1 ==    ''
         entLogicalContextName.1 ==        ''

         entLogicalDescr.2 ==              'Acme OSPF v1.1'
         entLogicalType.2 ==               ospf
         entLogicalCommunity.2 ==          'public-ospf2'
         entLogicalTAddress.2 ==           192.0.2.1:161
         entLogicalTDomain.2 ==            snmpUDPDomain
         entLogicalContextEngineID.2 ==    ''
         entLogicalContextName.2 ==        ''

       2 logical bridges:
         entLogicalDescr.3 ==              'Acme Bridge v2.1.1'
         entLogicalType.3  ==              dot1dBridge
         entLogicalCommunity.3 ==          'public-bridge1'
         entLogicalTAddress.3 ==           192.0.2.1:161
         entLogicalTDomain.3 ==            snmpUDPDomain
         entLogicalContextEngineID.3 ==    ''

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         entLogicalContextName.3 ==        ''

         entLogicalDescr.4 ==              'Acme Bridge v2.1.1'
         entLogicalType.4 ==               dot1dBridge
         entLogicalCommunity.4 ==          'public-bridge2'
         entLogicalTAddress.4 ==           192.0.2.1:161
         entLogicalTDomain.4 ==            snmpUDPDomain
         entLogicalContextEngineID.4 ==    ''
         entLogicalContextName.4 ==        ''

   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 because
     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
         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;
            (Bridge-1 uses ifIndex values 101 - 103 and Bridge-2 uses
   ifIndex values 204-206.)
            entAliasMappingIdentifier.5.0 ==  ifIndex.1
            entAliasMappingIdentifier.5.3 ==  ifIndex.101
            entAliasMappingIdentifier.6.0 ==  ifIndex.2

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            entAliasMappingIdentifier.6.3 ==  ifIndex.102
            entAliasMappingIdentifier.7.0 ==  ifIndex.3
            entAliasMappingIdentifier.7.3 ==  ifIndex.103
            entAliasMappingIdentifier.9.0 ==  ifIndex.4
            entAliasMappingIdentifier.9.4 ==  ifIndex.204
            entAliasMappingIdentifier.10.0 == ifIndex.5
            entAliasMappingIdentifier.10.4 == ifIndex.205
            entAliasMappingIdentifier.11.0 == ifIndex.6
            entAliasMappingIdentifier.11.4 == 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.8.11 ==     11

4.2.  Repeaters

   The second example is a 3-slot Hub with 2 backplane ethernet
   segments.  Slot three is empty, and the remaining slots contain
   ethernet repeater modules.

   Note that this example assumes an older Repeater MIB implementation,
   (RFC 1516 [RFC1516]) rather than the new Repeater MIB (RFC 2108
   [RFC2108]).  The new version contains an object called
   'rptrPortRptrId', which should be used to identify repeater port
   groupings, rather than using community strings or contexts.

   Physical entities -- entPhysicalTable:
      1 Field-replaceable physical chassis:
         entPhysicalDescr.1 ==       'Acme Chassis Model 110'
         entPhysicalVendorType.1 ==  acmeProducts.chassisTypes.2
         entPhysicalContainedIn.1 == 0

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         entPhysicalClass.1 ==       chassis(3)
         entPhysicalParentRelPos.1 ==0
         entPhysicalName.1 ==        '110-B'
         entPhysicalHardwareRev.1 == 'A(1.02.00)'
         entPhysicalSoftwareRev.1 == ''
         entPhysicalFirmwareRev.1 == ''
         entPhysicalSerialNum.1 ==   'C100079294'
         entPhysicalMfgName.1 ==     'Acme'
         entPhysicalModelName.1 ==   '110'
         entPhysicalAlias.1 ==       'bldg09:floor1:rptr18:0067eea0229f'
         entPhysicalAssetID.1 ==     '0007386327'
         entPhysicalIsFRU.1 ==       true(1)

      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'
         entPhysicalHardwareRev.2 ==    'A(2.04.01)'
         entPhysicalSoftwareRev.2 ==    ''
         entPhysicalFirmwareRev.2 ==    ''
         entPhysicalSerialNum.2 ==      ''
         entPhysicalMfgName.2 ==        'Acme'
         entPhysicalModelName.2 ==      'BK-A'
         entPhysicalAlias.2 ==          ''
         entPhysicalAssetID.2 ==        ''
         entPhysicalIsFRU.2 ==          false(2)

         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'
         entPhysicalHardwareRev.3 ==    'A(2.04.01)'
         entPhysicalSoftwareRev.3 ==    ''
         entPhysicalFirmwareRev.3 ==    ''
         entPhysicalSerialNum.3 ==      ''
         entPhysicalMfgName.3 ==        'Acme'
         entPhysicalModelName.3 ==      'BK-A'
         entPhysicalAlias.3 ==          ''
         entPhysicalAssetID.3 ==        ''
         entPhysicalIsFRU.3 ==          false(2)

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      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'
         entPhysicalHardwareRev.4 ==    'B(1.00.03)'
         entPhysicalSoftwareRev.4 ==    ''
         entPhysicalFirmwareRev.4 ==    ''
         entPhysicalSerialNum.4 ==      ''
         entPhysicalMfgName.4 ==        'Acme'
         entPhysicalModelName.4 ==      'RB'
         entPhysicalAlias.4 ==          ''
         entPhysicalAssetID.4 ==        ''
         entPhysicalIsFRU.4 ==          false(2)

         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'
         entPhysicalHardwareRev.5 ==    'B(1.00.03)'
         entPhysicalSoftwareRev.5 ==    ''
         entPhysicalFirmwareRev.5 ==    ''
         entPhysicalSerialNum.5 ==      ''
         entPhysicalMfgName.5 ==        'Acme'
         entPhysicalModelName.5 ==      'RB'
         entPhysicalAlias.5 ==          ''
         entPhysicalAssetID.5 ==        ''
         entPhysicalIsFRU.5 ==          false(2)

         entPhysicalDescr.6 ==          'Acme Hub Slot Type RB'
         entPhysicalVendorType.6  ==    acmeProducts.slotTypes.5
         entPhysicalContainedIn.6 ==    1
         entPhysicalClass.6 ==          container(5)
         entPhysicalParentRelPos.6 ==   3
         entPhysicalName.6 ==           'Slot 3'
         entPhysicalHardwareRev.6 ==    'B(1.00.03)'
         entPhysicalSoftwareRev.6 ==    ''
         entPhysicalFirmwareRev.6 ==    ''
         entPhysicalSerialNum.6 ==      ''
         entPhysicalMfgName.6 ==        'Acme'
         entPhysicalModelName.6 ==      'RB'
         entPhysicalAlias.6 ==          ''
         entPhysicalAssetID.6 ==        ''
         entPhysicalIsFRU.6 ==          false(2)

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      Slot 1 contains a plug-in module with 4 10-BaseT ports:
         entPhysicalDescr.7  ==         'Acme 10Base-T Module 114'
         entPhysicalVendorType.7 ==     acmeProducts.moduleTypes.32
         entPhysicalContainedIn.7  ==   4
         entPhysicalClass.7 ==          module(9)
         entPhysicalParentRelPos.7 ==   1
         entPhysicalName.7 ==           'M1'
         entPhysicalHardwareRev.7 ==    'A(1.02.01)'
         entPhysicalSoftwareRev.7 ==    '1.7.2'
         entPhysicalFirmwareRev.7 ==    'A(1.5)'
         entPhysicalSerialNum.7 ==      'C100096244'
         entPhysicalMfgName.7 ==        'Acme'
         entPhysicalModelName.7 =       '114'
         entPhysicalAlias.7 ==          'bldg09:floor1:eng'
         entPhysicalAssetID.7 ==        '0007962951'
         entPhysicalIsFRU.7 ==          true(1)

         entPhysicalDescr.8 ==          'Acme 10Base-T Port RB'
         entPhysicalVendorType.8 ==     acmeProducts.portTypes.10
         entPhysicalContainedIn.8  ==   7
         entPhysicalClass.8 ==          port(10)
         entPhysicalParentRelPos.8 ==   1
         entPhysicalName.8 ==           'Ethernet-A'
         entPhysicalHardwareRev.8 ==    'A(1.04F)'
         entPhysicalSoftwareRev.8 ==    ''
         entPhysicalFirmwareRev.8 ==    '1.4'
         entPhysicalSerialNum.8 ==      ''
         entPhysicalMfgName.8 ==        'Acme'
         entPhysicalModelName.8 ==      'RB'
         entPhysicalAlias.8 ==          ''
         entPhysicalAssetID.8 ==        ''
         entPhysicalIsFRU.8 ==          false(2)

         entPhysicalDescr.9  ==         'Acme 10Base-T Port RB'
         entPhysicalVendorType.9 ==     acmeProducts.portTypes.10
         entPhysicalContainedIn.9 ==    7
         entPhysicalClass.9 ==          port(10)
         entPhysicalParentRelPos.9 ==   2
         entPhysicalName.9 ==           'Ethernet-B'
         entPhysicalHardwareRev.9 ==    'A(1.04F)'
         entPhysicalSoftwareRev.9 ==    ''
         entPhysicalFirmwareRev.9 ==    '1.4'
         entPhysicalSerialNum.9 ==      ''
         entPhysicalMfgName.9 ==        'Acme'
         entPhysicalModelName.9 =       'RB'
         entPhysicalAlias.9 ==          ''
         entPhysicalAssetID.9 ==        ''
         entPhysicalIsFRU.9 ==          false(2)

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         entPhysicalDescr.10 ==         'Acme 10Base-T Port RB'
         entPhysicalVendorType.10 ==    acmeProducts.portTypes.10
         entPhysicalContainedIn.10 ==   7
         entPhysicalClass.10 ==         port(10)
         entPhysicalParentRelPos.10 ==  3
         entPhysicalName.10 ==          'Ethernet-C'
         entPhysicalHardwareRev.10 ==   'B(1.02.07)'
         entPhysicalSoftwareRev.10 ==   ''
         entPhysicalFirmwareRev.10 ==   '1.4'
         entPhysicalSerialNum.10 ==     ''
         entPhysicalMfgName.10 ==       'Acme'
         entPhysicalModelName.10 ==     'RB'
         entPhysicalAlias.10 ==         ''
         entPhysicalAssetID.10 ==       ''
         entPhysicalIsFRU.10 ==         false(2)

         entPhysicalDescr.11 ==         'Acme 10Base-T Port RB'
         entPhysicalVendorType.11  ==   acmeProducts.portTypes.10
         entPhysicalContainedIn.11 ==   7
         entPhysicalClass.11 ==         port(10)
         entPhysicalParentRelPos.11 ==  4
         entPhysicalName.11 ==          'Ethernet-D'
         entPhysicalHardwareRev.11 ==   'B(1.02.07)'
         entPhysicalSoftwareRev.11 ==   ''
         entPhysicalFirmwareRev.11 ==   '1.4'
         entPhysicalSerialNum.11 ==     ''
         entPhysicalMfgName.11 ==       'Acme'
         entPhysicalModelName.11 ==     'RB'
         entPhysicalAlias.11 ==         ''
         entPhysicalAssetID.11 ==       ''
         entPhysicalIsFRU.11 ==         false(2)

      Slot 2 contains another ethernet module with 2 ports.
         entPhysicalDescr.12 ==         'Acme 10Base-T Module Model 4'
         entPhysicalVendorType.12 ==    acmeProducts.moduleTypes.30
         entPhysicalContainedIn.12 =    5
         entPhysicalClass.12 ==         module(9)
         entPhysicalParentRelPos.12 ==  1
         entPhysicalName.12 ==          'M2'
         entPhysicalHardwareRev.12 ==   'A(1.01.07)'
         entPhysicalSoftwareRev.12 ==   '1.8.4'
         entPhysicalFirmwareRev.12 ==   'A(1.8)'
         entPhysicalSerialNum.12 ==     'C100102384'
         entPhysicalMfgName.12 ==       'Acme'
         entPhysicalModelName.12 ==     '4'
         entPhysicalAlias.12 ==         'bldg09:floor1:devtest'
         entPhysicalAssetID.12 ==       '0007968462'
         entPhysicalIsFRU.12 ==         true(1)

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         entPhysicalDescr.13 ==         'Acme 802.3 AUI Port'
         entPhysicalVendorType.13  ==   acmeProducts.portTypes.11
         entPhysicalContainedIn.13 ==   12
         entPhysicalClass.13 ==         port(10)
         entPhysicalParentRelPos.13 ==  1
         entPhysicalName.13 ==          'AUI'
         entPhysicalHardwareRev.13 ==   'A(1.06F)'
         entPhysicalSoftwareRev.13 ==   ''
         entPhysicalFirmwareRev.13 ==   '1.5'
         entPhysicalSerialNum.13 ==     ''
         entPhysicalMfgName.13 ==       'Acme'
         entPhysicalModelName.13 ==     ''
         entPhysicalAlias.13 ==         ''
         entPhysicalAssetID.13 ==       ''
         entPhysicalIsFRU.13 ==         false(2)

         entPhysicalDescr.14 ==         'Acme 10Base-T Port RD'
         entPhysicalVendorType.14  ==   acmeProducts.portTypes.14
         entPhysicalContainedIn.14 ==   12
         entPhysicalClass.14 ==         port(10)
         entPhysicalParentRelPos.14 ==  2
         entPhysicalName.14 ==          'E2'
         entPhysicalHardwareRev.14 ==   'B(1.01.02)'
         entPhysicalSoftwareRev.14 ==   ''
         entPhysicalFirmwareRev.14 ==   '2.1'
         entPhysicalSerialNum.14 ==     ''
         entPhysicalMfgName.14 ==       'Acme'
         entPhysicalModelName.14 ==     ''
         entPhysicalAlias.14 ==         ''
         entPhysicalAssetID.14 ==       ''
         entPhysicalIsFRU.14 ==         false(2)

   Logical entities -- entLogicalTable; with SNMPv3 support
      Repeater 1--comprised of any ports attached to backplane 1
         entLogicalDescr.1 ==           'Acme repeater v3.1'
         entLogicalType.1  ==           snmpDot3RptrMgt
         entLogicalCommunity.1          'public-repeater1'
         entLogicalTAddress.1 ==        192.0.2.1:161
         entLogicalTDomain.1 ==         snmpUDPDomain
         entLogicalContextEngineID.1 == '80000777017c7d7e7f'H
         entLogicalContextName.1 ==     'repeater1'

      Repeater 2--comprised of any ports attached to backplane 2:
         entLogicalDescr.2 ==           'Acme repeater v3.1'
         entLogicalType.2  ==           snmpDot3RptrMgt
         entLogicalCommunity.2 ==       'public-repeater2'
         entLogicalTAddress.2 ==        192.0.2.1:161
         entLogicalTDomain.2 ==         snmpUDPDomain

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         entLogicalContextEngineID.2 == '80000777017c7d7e7f'H
         entLogicalContextName.2 ==     'repeater2'

   Logical to Physical Mappings -- entLPMappingTable:

     repeater1 uses backplane 1, slot 1-ports 1 & 2, slot 2-port 1
     [ed. -- Note that a mapping to the module is not included,
      because this example represents a port-switchable hub.
      Even though all ports on the module could belong to the
      same repeater as a matter of configuration, the LP port
      mappings should not be replaced dynamically with a single
      mapping for the module (e.g., entLPPhysicalIndex.1.7).
      If all ports on the module shared a single backplane connection,
      then a single mapping for the module would be more appropriate.]

        entLPPhysicalIndex.1.2 ==       2
        entLPPhysicalIndex.1.8 ==       8
        entLPPhysicalIndex.1.9 ==       9
        entLPPhysicalIndex.1.13 ==      13

     repeater2 uses backplane 2, slot 1-ports 3 & 4, slot 2-port 2
         entLPPhysicalIndex.2.3 ==      3
         entLPPhysicalIndex.2.10 ==     10
         entLPPhysicalIndex.2.11 ==     11
         entLPPhysicalIndex.2.14 ==     14

   Physical to Logical to MIB Alias Mappings -- entAliasMappingTable:
     Repeater Port Identifier values are shared by both repeaters:
         entAliasMappingIdentifier.8.0 ==      rptrPortGroupIndex.1.1
         entAliasMappingIdentifier.9.0 ==      rptrPortGroupIndex.1.2
         entAliasMappingIdentifier.10.0 ==     rptrPortGroupIndex.1.3
         entAliasMappingIdentifier.11.0 ==     rptrPortGroupIndex.1.4
         entAliasMappingIdentifier.13.0 ==     rptrPortGroupIndex.2.1
         entAliasMappingIdentifier.14.0 ==     rptrPortGroupIndex.2.2

   Physical Containment Tree -- entPhysicalContainsTable
     chassis has two backplanes and three containers:
         entPhysicalChildIndex.1.2 ==   2
         entPhysicalChildIndex.1.3 ==   3
         entPhysicalChildIndex.1.4 ==   4
         entPhysicalChildIndex.1.5 ==   5
         entPhysicalChildIndex.1.6 ==   6

     container 1 has a module:
         entPhysicalChildIndex.4.7 ==   7

     container 2 has a module
         entPhysicalChildIndex.5.12 ==  12

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     [ed. -- in this example, container 3 is empty.]

     module 1 has 4 ports:
         entPhysicalChildIndex.7.8 ==   8
         entPhysicalChildIndex.7.9 ==   9
         entPhysicalChildIndex.7.10 ==  10
         entPhysicalChildIndex.7.11 ==  11

     module 2 has 2 ports:
         entPhysicalChildIndex.12.13 == 13
         entPhysicalChildIndex.12.14 == 14

5.  Security Considerations

   There are a number of management objects defined in this MIB that
   have a MAX-ACCESS clause of read-write and/or read-create.  Such
   objects may be considered sensitive or vulnerable in some network
   environments.  The support for SET operations in a non-secure
   environment without proper protection can have a negative effect on
   network operations.

   There are a number of managed objects in this MIB that may contain
   sensitive information.  These are:

   entPhysicalDescr
   entPhysicalVendorType
   entPhysicalHardwareRev
   entPhysicalFirmwareRev
   entPhysicalSoftwareRev
   entPhysicalSerialNum
   entPhysicalMfgName
   entPhysicalModelName

      These objects expose information about the physical entities
      within a managed system, which may be used to identify the vendor,
      model, and version information of each system component.

   entPhysicalAssetID

      This object can allow asset identifiers for various system
      components to be exposed, in the event this MIB object is actually
      configured by an NMS application.

   entLogicalDescr
   entLogicalType

      These objects expose the type of logical entities present in the
      managed system.

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   entLogicalCommunity

      This object exposes community names associated with particular
      logical entities within the system.

   entLogicalTAddress
   entLogicalTDomain

      These objects expose network addresses that can be used to
      communicate with an SNMP agent on behalf of particular logical
      entities within the system.

   entLogicalContextEngineID
   entLogicalContextName

      These objects identify the authoritative SNMP engine that contains
      information on behalf of particular logical entities within the
      system.

   It is thus important to control even GET access to these objects
   and possibly to even encrypt the values of these object when
   sending them over the network via SNMP.  Not all versions of SNMP
   provide features for such a secure environment.

   SNMPv1 by itself is not a secure environment.  Even if the network
   itself is secure (for example by using IPSec), even then, there is
   no control as to who on the secure network is allowed to access and
   GET/SET (read/change/create/delete) the objects in this MIB.

   It is recommended that the implementers consider the security
   features as provided by the SNMPv3 framework.  Specifically, the
   use of the User-based Security Model RFC 3414 [RFC3414] and the
   View-based Access Control Model RFC 3415 [RFC3415] is recommended.

   It is then a customer/user responsibility to ensure that the SNMP
   entity giving access to an instance of this MIB, is properly
   configured to give access to the objects only to those principals
   (users) that have legitimate rights to indeed GET or SET
   (change/create/delete) them.

6.  IANA Considerations

   The MIB module in this document uses the following IANA-assigned
   OBJECT IDENTIFIER values recorded in the SMI Numbers registry:

              Descriptor        OBJECT IDENTIFIER value
              ----------        -----------------------
              entityMIB         { mib-2 47 }

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7.  Acknowledgements

   This memo has been produced by the IETF's Entity MIB working group.

8.  References

8.1.  Normative References

   [RFC2578]     McCloghrie, K., Perkins, D., and J. Schoenwaelder,
                 "Structure of Management Information Version 2
                 (SMIv2)", STD 58, RFC 2578, April 1999.

   [RFC2579]     McCloghrie, K., Perkins, D., and J. Schoenwaelder,
                 "Textual Conventions for SMIv2", STD 58, RFC 2579,
                 April 1999.

   [RFC2580]     McCloghrie, K., Perkins, D., and J. Schoenwaelder,
                 "Conformance Statements for SMIv2", STD 58, RFC 2580,
                 April 1999.

   [RFC3411]     Harrington, D., Presuhn, R., and B. Wijnen, "An
                 Architecture for Describing Simple Network Management
                 Protocol (SNMP) Management Frameworks", STD 62, RFC
                 3411, December 2002.

   [RFC3417]     Presuhn, R., "Transport Mappings for the Simple Network
                 Management Protocol (SNMP)", STD 62, RFC 3417, December
                 2002.

   [RFC3986]     Berners-Lee, T., Fielding, R., and L. Masinter,
                 "Uniform Resource Identifier (URI): Generic Syntax",
                 STD 66, RFC 3986, January 2005.

8.2.  Informative References

   [RFC1157]     Case, J., Fedor, M., Schoffstall, M., and J. Davin,
                 "Simple Network Management Protocol", STD 15, RFC 1157,
                 May 1990.

   [RFC1493]     Decker, E., Langille, P., Rijsinghani, A., and K.
                 McCloghrie, "Definitions of Managed Objects for
                 Bridges", RFC 1493, July 1993.

   [RFC1516]     McMaster, D. and K. McCloghrie, "Definitions of Managed
                 Objects for IEEE 802.3 Repeater Devices", RFC 1516,
                 September 1993.

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   [RFC2037]     McCloghrie, K. and A. Bierman, "Entity MIB using
                 SMIv2", RFC 2037, October 1996.

   [RFC2108]     de Graaf, K., Romascanu, D., McMaster, D., and K.
                 McCloghrie, "Definitions of Managed Objects for IEEE
                 802.3 Repeater Devices using SMIv2", RFC 2108, February
                 1997.

   [RFC2737]     McCloghrie, K. and A. Bierman, "Entity MIB (Version
                 2)", RFC 2737, December 1999.

   [RFC2863]     McCloghrie, K. and F. Kastenholz, "The Interfaces Group
                 MIB", RFC 2863, June 2000.

   [RFC3406]     Daigle, L., van Gulik, D., Iannella, R., and P.
                 Faltstrom, "Uniform Resource Names (URN) Namespace
                 Definition Mechanisms", BCP 66, RFC 3406, October 2002.

   [RFC3410]     Case, J., Mundy, R., Partain, D., and B. Stewart,
                 "Introduction and Applicability Statements for
                 Internet-Standard Management Framework", RFC 3410,
                 December 2002.

   [RFC3414]     Blumenthal, U. and B. Wijnen, "User-based Security
                 Model (USM) for version 3 of the Simple Network
                 Management Protocol (SNMPv3)", STD 62, RFC 3414,
                 December 2002.

   [RFC3415]     Wijnen, B., Presuhn, R., and K. McCloghrie, "View-based
                 Access Control Model (VACM) for the Simple Network
                 Management Protocol (SNMP)", STD 62, RFC 3415, December
                 2002.

   [RFC4152]     Tesink, K. and R. Fox, "A Uniform Resource Name (URN)
                 Namespace for the CLEI Code", RFC 4152, August 2005.

   [T1.213]      ATIS T1.213-2001, "Coded Identification of Equipment
                 Entities in the North American Telecommunications
                 System for Information Exchange", 2001, www.ansi.org.

   [T1.213a]     ATIS T1.213a, "Supplement to T1.213-2001, Coded
                 Identification of Equipment Entities in the North
                 American Telecommunications System for Information
                 Exchange, to correct the representation of the Basic
                 Code in Figure B.1", 2001, www.ansi.org.

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Authors' Addresses

   Andy Bierman

   EMail: ietf@andybierman.com


   Keith McCloghrie
   Cisco Systems, Inc.
   170 West Tasman Drive
   San Jose, CA 95134 USA

   Phone: +1 408-526-5260
   EMail: kzm@cisco.com

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Full Copyright Statement

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