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Versions: (draft-kun-ietf-cfm-yang) 00

Internet Engineering Task Force                                Kun Wang
Internet Draft                                                 Ericsson
Intended status: Standards Track                              Alex Wang
Expires: September 2017                                         Ericsson
                                                               Chin Chen
                                                                Ericsson
                                                                  Hua Lv
                                                                Ericsson
                                                         March 29, 2017



                     Yang Data Model for CFM Protocol
                      draft-wang-netmod-cfm-yang-00.txt


Abstract

   This document defines a YANG data model that can be used to
configure and manage CFM.

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF), its areas, and its working groups.  Note that
   other groups may also distribute working documents as Internet-
   Drafts.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   The list of current Internet-Drafts can be accessed at
   http://www.ietf.org/ietf/1id-abstracts.txt

   The list of Internet-Draft Shadow Directories can be accessed at
   http://www.ietf.org/shadow.html

This Internet-Draft will expire on September 29, 2017.

Copyright Notice

   Copyright (c) 2017 IETF Trust and the persons identified as the
   document authors. All rights reserved.



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   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document. Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document. Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.



Table of Contents

   1. Overview.......................................................2
      1.1. Requirement language......................................2
   2. Design of Data Model...........................................3
      2.1. Overview..................................................3
      2.2. CFM stack.................................................8
      2.3. CFM Default MD............................................9
      2.4. CFM VLAN..................................................9
      2.5. CFM Config Error List....................................10
      2.6. CFM MD...................................................10
      2.7. CFM MA...................................................11
      2.8. CFM MEP..................................................12
   3. CFM YANG Module...............................................20
   4. Security Considerations.......................................90
   5. IANA Considerations...........................................90
   6. Normative References..........................................90




1. Overview

   This document defines a YANG [RFC6020] data model which can be used
   for configuring and managing CFM [IEEE802.1ag].

   This data model includes configuration data and state data, for
   example the configuration of MD, MA, and MEP and the state of MEP.

1.1. Requirement language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in
   [RFC2119].


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2. Design of Data Model

   The goal of this document is to define a data model that provides a
   common user interface to the CFM.  There is very little information
   that is designated as "mandatory", providing freedom for vendors to
   adapt this data model to their respective product implementations.

2.1. Overview

   The CFM YANG module defined in this document has all the common
   building blocks for the CFM protocol.

   The CFM module is created based on CFM MIB with a slight change for
   meeting the YANG model requirement.

   module: ietf-cfm
      +--ro dot1agCfmStack
      |  +--ro dot1agCfmStackEntry* [dot1agCfmStackifIndex
   dot1agCfmStackVlanIdOrNone dot1agCfmStackMdLevel
   dot1agCfmStackDirection]
      |     +--ro dot1agCfmStackifIndex         cfm:if-index
      |     +--ro dot1agCfmStackVlanIdOrNone    cfm:VlanIdOrNone
      |     +--ro dot1agCfmStackMdLevel         cfm:Dot1agCfmMDLevel
      |     +--ro dot1agCfmStackDirection       cfm:Dot1agCfmMpDirection
      |     +--ro dot1agCfmStackMdIndex?        uint32
      |     +--ro dot1agCfmStackMaIndex?        uint32
      |     +--ro dot1agCfmStackMepId?          cfm:Dot1agCfmMepIdOrZero
      |     +--ro dot1agCfmStackMacAddress?     yang:mac-address
      +--rw dot1agCfmDefaultMd
      |  +--rw dot1agCfmDefaultMdDefLevel?          cfm:Dot1agCfmMDLevel
      |  +--rw dot1agCfmDefaultMdDefMhfCreation?
   cfm:Dot1agCfmMhfCreation
      |  +--rw dot1agCfmDefaultMdDefIdPermission?
   cfm:Dot1agCfmIdPermission
      |  +--rw dot1agCfmDefaultMdEntry* [dot1agCfmDefaultMdComponentId
   dot1agCfmDefaultMdPrimaryVid]
      |     +--rw dot1agCfmDefaultMdComponentId
   cfm:Dot1agCfmPbbComponentIdentifier
      |     +--rw dot1agCfmDefaultMdPrimaryVid      cfm:VlanId
      |     +--ro dot1agCfmDefaultMdStatus?         boolean
      |     +--rw dot1agCfmDefaultMdLevel?
   cfm:Dot1agCfmMDLevelOrNone
      |     +--rw dot1agCfmDefaultMdMhfCreation?
   cfm:Dot1agCfmMhfCreation
      |     +--rw dot1agCfmDefaultMdIdPermission?
   cfm:Dot1agCfmIdPermission
      +--rw dot1agCfmVlan


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      |  +--rw dot1agCfmVlanEntry* [dot1agCfmVlanComponentId
   dot1agCfmVlanVid]
      |     +--rw dot1agCfmVlanComponentId
   cfm:Dot1agCfmPbbComponentIdentifier
      |     +--rw dot1agCfmVlanVid            cfm:VlanId
      |     +--rw dot1agCfmVlanPrimaryVid?    cfm:VlanId
      |     +--rw dot1agCfmVlanRowStatus?     cfm:RowStatus
      +--ro dot1agCfmConfigErrorList
      |  +--ro dot1agCfmConfigErrorListEntry*
   [dot1agCfmConfigErrorListVid dot1agCfmConfigErrorListIfIndex]
      |     +--ro dot1agCfmConfigErrorListVid          cfm:VlanId
      |     +--ro dot1agCfmConfigErrorListIfIndex      cfm:if-index
      |     +--ro dot1agCfmConfigErrorListErrorType?
   cfm:Dot1agCfmConfigErrors
      +--rw dot1agCfmMd
      |  +--ro dot1agCfmMdTableNextIndex?
   cfm:Dot1afCfmIndexIntegerNextFree
      |  +--rw dot1agCfmMdEntry* [dot1agCfmMdIndex]
      |     +--rw dot1agCfmMdIndex              uint32
      |     +--rw dot1agCfmMdFormat?
   cfm:Dot1agCfmMaintDomainNameType
      |     +--rw dot1agCfmMdName?
   cfm:Dot1agCfmMaintDomainName
      |     +--rw dot1agCfmMdMdLevel?           cfm:Dot1agCfmMDLevel
      |     +--rw dot1agCfmMdMhfCreation?       cfm:Dot1agCfmMhfCreation
      |     +--rw dot1agCfmMdMhfIdPermission?
   cfm:Dot1agCfmIdPermission
      |     +--ro dot1agCfmMdMaNextIndex?
   cfm:Dot1afCfmIndexIntegerNextFree
      |     +--rw dot1agCfmMdRowStatus?         cfm:RowStatus
      +--rw dot1agCfmMa
      |  +--rw dot1agCfmMaNetEntry* [dot1agCfmMdIndex dot1agCfmMaIndex]
      |  |  +--rw dot1agCfmMdIndex             ->
   /dot1agCfmMd/dot1agCfmMdEntry/dot1agCfmMdIndex
      |  |  +--rw dot1agCfmMaIndex             uint32
      |  |  +--rw dot1agCfmMaNetFormat?
   cfm:Dot1agCfmMaintAssocNameType
      |  |  +--rw dot1agCfmMaNetName?
   cfm:Dot1agCfmMaintAssocName
      |  |  +--rw dot1agCfmMaNetCcmInterval?   cfm:Dot1agCfmCcmInterval
      |  |  +--rw dot1agCfmMaNetRowStatus?     cfm:RowStatus
      |  +--rw dot1agCfmMaCompEntry* [dot1agCfmMaComponentId
   dot1agCfmMdIndex dot1agCfmMaIndex]
      |  |  +--rw dot1agCfmMdIndex                ->
   /dot1agCfmMd/dot1agCfmMdEntry/dot1agCfmMdIndex
      |  |  +--rw dot1agCfmMaIndex                ->
   /dot1agCfmMa/dot1agCfmMaNetEntry/dot1agCfmMaIndex


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      |  |  +--rw dot1agCfmMaComponentId
   cfm:Dot1agCfmPbbComponentIdentifier
      |  |  +--rw dot1agCfmMaCompPrimaryVlanId?   cfm:VlanIdOrNone
      |  |  +--rw dot1agCfmMaCompMhfCreation?
   cfm:Dot1agCfmMhfCreation
      |  |  +--rw dot1agCfmMaCompIdPermission?
   cfm:Dot1agCfmIdPermission
      |  |  +--ro dot1agCfmMaCompNumberOfVids?    uint32
      |  |  +--rw dot1agCfmMaCompRowStatus?       cfm:RowStatus
      |  +--rw dot1agCfmMaMepListEntry* [dot1agCfmMdIndex
   dot1agCfmMaIndex dot1agCfmMaMepListIdentifier]
      |     +--rw dot1agCfmMdIndex                ->
   /dot1agCfmMd/dot1agCfmMdEntry/dot1agCfmMdIndex
      |     +--rw dot1agCfmMaIndex                ->
   /dot1agCfmMa/dot1agCfmMaNetEntry/dot1agCfmMaIndex
      |     +--rw dot1agCfmMaMepListIdentifier    cfm:Dot1agCfmMepId
      |     +--rw dot1agCfmMaMepListRowStatus?    cfm:RowStatus
      +--rw dot1agCfmMep
         +--rw dot1agCfmMepEntry* [dot1agCfmMdIndex dot1agCfmMaIndex
   dot1agCfmMepIdentifier]
         |  +--rw dot1agCfmMdIndex                           ->
   /dot1agCfmMd/dot1agCfmMdEntry/dot1agCfmMdIndex
         |  +--rw dot1agCfmMaIndex                           ->
   /dot1agCfmMa/dot1agCfmMaNetEntry/dot1agCfmMaIndex
         |  +--rw dot1agCfmMepIdentifier
   cfm:Dot1agCfmMepId
         |  +--rw dot1agCfmMepIfIndex?                       cfm:if-
   index-or-zero
         |  +--rw dot1agCfmMepDirection?
   cfm:Dot1agCfmMpDirection
         |  +--rw dot1agCfmMepPrimaryVid?                    uint32
         |  +--rw dot1agCfmMepActive?                        boolean
         |  +--ro dot1agCfmMepFngState?
   cfm:Dot1agCfmFngState
         |  +--rw dot1agCfmMepCciEnabled?                    boolean
         |  +--rw dot1agCfmMepCcmLtmPriority?                uint32
         |  +--ro dot1agCfmMepMacAddress?                    yang:mac-
   address
         |  +--rw dot1agCfmMepLowPrDef?
   cfm:Dot1agCfmLowestAlarmPri
         |  +--rw dot1agCfmMepFngAlarmTime?
   cfm:TimeInterval
         |  +--rw dot1agCfmMepFngResetTime?
   cfm:TimeInterval
         |  +--ro dot1agCfmMepHighestPrDefect?
   cfm:Dot1agCfmHighestDefectPri



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         |  +--ro dot1agCfmMepDefects?
   cfm:Dot1agCfmMepDefects
         |  +--ro dot1agCfmMepErrorCcmLastFailure?           binary
         |  +--ro dot1agCfmMepXconCcmLastFailure?            binary
         |  +--ro dot1agCfmMepCcmSequenceErrors?
   yang:counter32
         |  +--ro dot1agCfmMepCciSentCcms?
   yang:counter32
         |  +--ro dot1agCfmMepNextLbmTransId?                uint32
         |  +--ro dot1agCfmMepLbrIn?
   yang:counter32
         |  +--ro dot1agCfmMepLbrInOutOfOrder?
   yang:counter32
         |  +--ro dot1agCfmMepLbrBadMsdu?
   yang:counter32
         |  +--ro dot1agCfmMepLtmNextSeqNumber?              uint32
         |  +--ro dot1agCfmMepUnexpLtrIn?
   yang:counter32
         |  +--ro dot1agCfmMepLbrOut?
   yang:counter32
         |  +--rw dot1agCfmMepTransmitLbmStatus?             boolean
         |  +--rw dot1agCfmMepTransmitLbmDestMacAddress?     yang:mac-
   address
         |  +--rw dot1agCfmMepTransmitLbmDestMepId?
   cfm:Dot1agCfmMepIdOrZero
         |  +--rw dot1agCfmMepTransmitLbmDestIsMepId?        boolean
         |  +--rw dot1agCfmMepTransmitLbmMessages?           int32
         |  +--rw dot1agCfmMepTransmitLbmDataTlv?            binary
         |  +--rw dot1agCfmMepTransmitLbmVlanPriority?       int32
         |  +--rw dot1agCfmMepTransmitLbmVlanDropEnable?     boolean
         |  +--ro dot1agCfmMepTransmitLbmResultOK?           boolean
         |  +--ro dot1agCfmMepTransmitLbmSeqNumber?          uint32
         |  +--ro dot1agCfmMepTransmitLtmStatus?             boolean
         |  +--rw dot1agCfmMepTransmitLtmFlags?              bits
         |  +--rw dot1agCfmMepTransmitLtmTargetMacAddress?   yang:mac-
   address
         |  +--rw dot1agCfmMepTransmitLtmTargetMepId?
   cfm:Dot1agCfmMepIdOrZero
         |  +--rw dot1agCfmMepTransmitLtmTargetIsMepId?      boolean
         |  +--rw dot1agCfmMepTransmitLtmTtl?                uint32
         |  +--ro dot1agCfmMepTransmitLtmResult?             boolean
         |  +--ro dot1agCfmMepTransmitLtmSeqNumber?          uint32
         |  +--rw dot1agCfmMepTransmitLtmEgressIdentifier?   binary
         |  +--rw dot1agCfmMepRowStatus?
   cfm:RowStatus




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         +--rw dot1agCfmLtrEntry* [dot1agCfmMdIndex dot1agCfmMaIndex
   dot1agCfmMepIdentifier dot1agCfmLtrSeqNumber
   dot1agCfmLtrReceiveOrder]
         |  +--rw dot1agCfmMdIndex                       ->
   /dot1agCfmMd/dot1agCfmMdEntry/dot1agCfmMdIndex
         |  +--rw dot1agCfmMaIndex                       ->
   /dot1agCfmMa/dot1agCfmMaNetEntry/dot1agCfmMaIndex
         |  +--rw dot1agCfmMepIdentifier                 ->
   /dot1agCfmMep/dot1agCfmMepEntry/dot1agCfmMepIdentifier
         |  +--rw dot1agCfmLtrSeqNumber                  uint32
         |  +--rw dot1agCfmLtrReceiveOrder               uint32
         |  +--ro dot1agCfmLtrTtl?                       uint32
         |  +--ro dot1agCfmLtrForwarded?                 boolean
         |  +--ro dot1agCfmLtrTerminalMep?               boolean
         |  +--ro dot1agCfmLtrLastEgressIdentifier?      binary
         |  +--ro dot1agCfmLtrNextEgressIdentifier?      binary
         |  +--ro dot1agCfmLtrRelay?
   cfm:Dot1agCfmRelayActionFieldValue
         |  +--ro dot1agCfmLtrChassisIdSubtype?
   cfm:LldpChassisIdSubtype
         |  +--ro dot1agCfmLtrChassisId?
   cfm:LldpChassisId
         |  +--ro dot1agCfmLtrManAddressDomain?          cfm:TDomain
         |  +--ro dot1agCfmLtrManAddress?                cfm:TAddress
         |  +--ro dot1agCfmLtrIngress?
   cfm:Dot1agCfmIngressActionFieldValue
         |  +--ro dot1agCfmLtrIngressMac?                yang:mac-
   address
         |  +--ro dot1agCfmLtrIngressPortIdSubtype?
   cfm:LldpPortIdSubtype
         |  +--ro dot1agCfmLtrIngressPortId?             cfm:LldpPortId
         |  +--ro dot1agCfmLtrEgress?
   cfm:Dot1agCfmEgressActionFieldValue
         |  +--ro dot1agCfmLtrEgressMac?                 yang:mac-
   address
         |  +--ro dot1agCfmLtrEgressPortIdSubtype?
   cfm:LldpPortIdSubtype
         |  +--ro dot1agCfmLtrEgressPortId?              cfm:LldpPortId
         |  +--ro dot1agCfmLtrOrganizationSpecificTlv?   binary
         +--rw dot1agCfmMepDbEntry* [dot1agCfmMdIndex dot1agCfmMaIndex
   dot1agCfmMepIdentifier dot1agCfmMepDbRMepIdentifier]
            +--rw dot1agCfmMdIndex                    ->
   /dot1agCfmMd/dot1agCfmMdEntry/dot1agCfmMdIndex
            +--rw dot1agCfmMaIndex                    ->
   /dot1agCfmMa/dot1agCfmMaNetEntry/dot1agCfmMaIndex
            +--rw dot1agCfmMepIdentifier              ->
   /dot1agCfmMep/dot1agCfmMepEntry/dot1agCfmMepIdentifier


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            +--rw dot1agCfmMepDbRMepIdentifier        cfm:Dot1agCfmMepId
            +--ro dot1agCfmMepDbRMepState?
   cfm:Dot1agCfmRemoteMepState
            +--ro dot1agCfmMepDbRMepFailedOkTime?     yang:timestamp
            +--ro dot1agCfmMepDbMacAddress?           yang:mac-address
            +--ro dot1agCfmMepDbRdi?                  boolean
            +--ro dot1agCfmMepDbPortStatusTlv?
   cfm:Dot1agCfmPortStatus
            +--ro dot1agCfmMepDbInterfaceStatusTlv?
   cfm:Dot1agCfmInterfaceStatus
            +--ro dot1agCfmMepDbChassisIdSubtype?
   cfm:LldpChassisIdSubtype
            +--ro dot1agCfmMepDbChassisId?            cfm:LldpChassisId
            +--ro dot1agCfmMepDbManAddressDomain?     cfm:TDomain
            +--ro dot1agCfmMepDbManAddress?           cfm:TAddress
   notifications:
      +---n dot1agCfmFaultAlarm
         +--ro dot1agCfmFaultAlarm-dot1agCfmMepHighestPrDefect
            +--ro dot1agCfmMdIndex?              ->
   /dot1agCfmMd/dot1agCfmMdEntry/dot1agCfmMdIndex
            +--ro dot1agCfmMaIndex?              ->
   /dot1agCfmMa/dot1agCfmMaNetEntry/dot1agCfmMaIndex
            +--ro dot1agCfmMepIdentifier?        ->
   /dot1agCfmMep/dot1agCfmMepEntry/dot1agCfmMepIdentifier
            +--ro dot1agCfmMepHighestPrDefect?
   cfm:Dot1agCfmHighestDefectPri



2.2. CFM stack

     It enables the network administrator to discover the information
   about the Maintenance Points configured on a port.

   +--ro dot1agCfmStack

      |  +--ro dot1agCfmStackEntry* [dot1agCfmStackifIndex
   dot1agCfmStackVlanIdOrNone dot1agCfmStackMdLevel
   dot1agCfmStackDirection]

      |     +--ro dot1agCfmStackifIndex         cfm:if-index

      |     +--ro dot1agCfmStackVlanIdOrNone    cfm:VlanIdOrNone

      |     +--ro dot1agCfmStackMdLevel         cfm:Dot1agCfmMDLevel

      |     +--ro dot1agCfmStackDirection       cfm:Dot1agCfmMpDirection


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      |     +--ro dot1agCfmStackMdIndex?        uint32

      |     +--ro dot1agCfmStackMaIndex?        uint32

      |     +--ro dot1agCfmStackMepId?          cfm:Dot1agCfmMepIdOrZero

      |     +--ro dot1agCfmStackMacAddress?     yang:mac-address

2.3. CFM Default MD

     The Default MD is to control the MIP Half Function creation for
   VIDs that are not contained in the list VIDs associated with
   Maintenance Association.

      +--rw dot1agCfmDefaultMd

      |  +--rw dot1agCfmDefaultMdDefLevel?          cfm:Dot1agCfmMDLevel

      |  +--rw dot1agCfmDefaultMdDefMhfCreation?
   cfm:Dot1agCfmMhfCreation

      |  +--rw dot1agCfmDefaultMdDefIdPermission?
   cfm:Dot1agCfmIdPermission

      |  +--rw dot1agCfmDefaultMdEntry* [dot1agCfmDefaultMdComponentId
   dot1agCfmDefaultMdPrimaryVid]

      |     +--rw dot1agCfmDefaultMdComponentId
   cfm:Dot1agCfmPbbComponentIdentifier

      |     +--rw dot1agCfmDefaultMdPrimaryVid      cfm:VlanId

      |     +--ro dot1agCfmDefaultMdStatus?         boolean

      |     +--rw dot1agCfmDefaultMdLevel?
   cfm:Dot1agCfmMDLevelOrNone

      |     +--rw dot1agCfmDefaultMdMhfCreation?
   cfm:Dot1agCfmMhfCreation

      |     +--rw dot1agCfmDefaultMdIdPermission?
   cfm:Dot1agCfmIdPermission

2.4. CFM VLAN

     It contains the association between VID and VLAN.



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      +--rw dot1agCfmVlan
      |  +--rw dot1agCfmVlanEntry* [dot1agCfmVlanComponentId
   dot1agCfmVlanVid]
      |     +--rw dot1agCfmVlanComponentId
   cfm:Dot1agCfmPbbComponentIdentifier
      |     +--rw dot1agCfmVlanVid            cfm:VlanId
      |     +--rw dot1agCfmVlanPrimaryVid?    cfm:VlanId
      |     +--rw dot1agCfmVlanRowStatus?     cfm:RowStatus


2.5. CFM Config Error List

     It contains the CFM configuration error for a VLAN ID on a port.
   +--ro dot1agCfmConfigErrorList
   |  +--ro dot1agCfmConfigErrorListEntry* [dot1agCfmConfigErrorListVid
dot1agCfmConfigErrorListIfIndex]
   |     +--ro dot1agCfmConfigErrorListVid          cfm:VlanId
   |     +--ro dot1agCfmConfigErrorListIfIndex      cfm:if-index
   |     +--ro dot1agCfmConfigErrorListErrorType?
cfm:Dot1agCfmConfigErrors


2.6. CFM MD

     Maintenance Domain container contains the Domain configuration
   information. The Maintenance Domain level which the monitor is at is
   also specified here.

      +--rw dot1agCfmMd
      |  +--ro dot1agCfmMdTableNextIndex?
   cfm:Dot1afCfmIndexIntegerNextFree
      |  +--rw dot1agCfmMdEntry* [dot1agCfmMdIndex]
      |     +--rw dot1agCfmMdIndex              uint32
      |     +--rw dot1agCfmMdFormat?
   cfm:Dot1agCfmMaintDomainNameType
      |     +--rw dot1agCfmMdName?
   cfm:Dot1agCfmMaintDomainName
      |     +--rw dot1agCfmMdMdLevel?           cfm:Dot1agCfmMDLevel
      |     +--rw dot1agCfmMdMhfCreation?       cfm:Dot1agCfmMhfCreation
      |     +--rw dot1agCfmMdMhfIdPermission?
   cfm:Dot1agCfmIdPermission
      |     +--ro dot1agCfmMdMaNextIndex?
   cfm:Dot1afCfmIndexIntegerNextFree
      |     +--rw dot1agCfmMdRowStatus?         cfm:RowStatus





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2.7. CFM MA

     The Maintenance Association contains the configuration related to
   the which flow the MA could monitor. For example, the VID of the flow
   and the CCM interval.

      +--rw dot1agCfmMa

      |  +--rw dot1agCfmMaNetEntry* [dot1agCfmMdIndex dot1agCfmMaIndex]

      |  |  +--rw dot1agCfmMdIndex             ->
   /dot1agCfmMd/dot1agCfmMdEntry/dot1agCfmMdIndex

      |  |  +--rw dot1agCfmMaIndex             uint32

      |  |  +--rw dot1agCfmMaNetFormat?
   cfm:Dot1agCfmMaintAssocNameType

      |  |  +--rw dot1agCfmMaNetName?
   cfm:Dot1agCfmMaintAssocName

      |  |  +--rw dot1agCfmMaNetCcmInterval?   cfm:Dot1agCfmCcmInterval

      |  |  +--rw dot1agCfmMaNetRowStatus?     cfm:RowStatus

      |  +--rw dot1agCfmMaCompEntry* [dot1agCfmMaComponentId
   dot1agCfmMdIndex dot1agCfmMaIndex]

      |  |  +--rw dot1agCfmMdIndex                ->
   /dot1agCfmMd/dot1agCfmMdEntry/dot1agCfmMdIndex

      |  |  +--rw dot1agCfmMaIndex                ->
   /dot1agCfmMa/dot1agCfmMaNetEntry/dot1agCfmMaIndex

      |  |  +--rw dot1agCfmMaComponentId
   cfm:Dot1agCfmPbbComponentIdentifier

      |  |  +--rw dot1agCfmMaCompPrimaryVlanId?   cfm:VlanIdOrNone

      |  |  +--rw dot1agCfmMaCompMhfCreation?
   cfm:Dot1agCfmMhfCreation

      |  |  +--rw dot1agCfmMaCompIdPermission?
   cfm:Dot1agCfmIdPermission

      |  |  +--ro dot1agCfmMaCompNumberOfVids?    uint32



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      |  |  +--rw dot1agCfmMaCompRowStatus?       cfm:RowStatus

      |  +--rw dot1agCfmMaMepListEntry* [dot1agCfmMdIndex
   dot1agCfmMaIndex dot1agCfmMaMepListIdentifier]

      |     +--rw dot1agCfmMdIndex                ->
   /dot1agCfmMd/dot1agCfmMdEntry/dot1agCfmMdIndex

      |     +--rw dot1agCfmMaIndex                ->
   /dot1agCfmMa/dot1agCfmMaNetEntry/dot1agCfmMaIndex

      |     +--rw dot1agCfmMaMepListIdentifier    cfm:Dot1agCfmMepId

      |     +--rw dot1agCfmMaMepListRowStatus?    cfm:RowStatus

2.8. CFM MEP

   The MEP container contains the configuration for a Maintenance point,
   for example, the direction, ID, VID and so on. It also contains the
   LTR related information and the database of MEP.

      +--rw dot1agCfmMep

         +--rw dot1agCfmMepEntry* [dot1agCfmMdIndex dot1agCfmMaIndex
   dot1agCfmMepIdentifier]

         |  +--rw dot1agCfmMdIndex                           ->
   /dot1agCfmMd/dot1agCfmMdEntry/dot1agCfmMdIndex

         |  +--rw dot1agCfmMaIndex                           ->
   /dot1agCfmMa/dot1agCfmMaNetEntry/dot1agCfmMaIndex

         |  +--rw dot1agCfmMepIdentifier
   cfm:Dot1agCfmMepId

         |  +--rw dot1agCfmMepIfIndex?                       cfm:if-
   index-or-zero

         |  +--rw dot1agCfmMepDirection?
   cfm:Dot1agCfmMpDirection

         |  +--rw dot1agCfmMepPrimaryVid?                    uint32

         |  +--rw dot1agCfmMepActive?                        boolean

         |  +--ro dot1agCfmMepFngState?
   cfm:Dot1agCfmFngState


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         |  +--rw dot1agCfmMepCciEnabled?                    boolean

         |  +--rw dot1agCfmMepCcmLtmPriority?                uint32

         |  +--ro dot1agCfmMepMacAddress?                    yang:mac-
   address

         |  +--rw dot1agCfmMepLowPrDef?
   cfm:Dot1agCfmLowestAlarmPri

         |  +--rw dot1agCfmMepFngAlarmTime?
   cfm:TimeInterval

         |  +--rw dot1agCfmMepFngResetTime?
   cfm:TimeInterval

         |  +--ro dot1agCfmMepHighestPrDefect?
   cfm:Dot1agCfmHighestDefectPri

         |  +--ro dot1agCfmMepDefects?
   cfm:Dot1agCfmMepDefects

         |  +--ro dot1agCfmMepErrorCcmLastFailure?           binary

         |  +--ro dot1agCfmMepXconCcmLastFailure?            binary

         |  +--ro dot1agCfmMepCcmSequenceErrors?
   yang:counter32

         |  +--ro dot1agCfmMepCciSentCcms?
   yang:counter32

         |  +--ro dot1agCfmMepNextLbmTransId?                uint32

         |  +--ro dot1agCfmMepLbrIn?
   yang:counter32

         |  +--ro dot1agCfmMepLbrInOutOfOrder?
   yang:counter32

         |  +--ro dot1agCfmMepLbrBadMsdu?
   yang:counter32

         |  +--ro dot1agCfmMepLtmNextSeqNumber?              uint32

         |  +--ro dot1agCfmMepUnexpLtrIn?
   yang:counter32


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         |  +--ro dot1agCfmMepLbrOut?
   yang:counter32

         |  +--rw dot1agCfmMepTransmitLbmStatus?             boolean

         |  +--rw dot1agCfmMepTransmitLbmDestMacAddress?     yang:mac-
   address

         |  +--rw dot1agCfmMepTransmitLbmDestMepId?
   cfm:Dot1agCfmMepIdOrZero

         |  +--rw dot1agCfmMepTransmitLbmDestIsMepId?        boolean

         |  +--rw dot1agCfmMepTransmitLbmMessages?           int32

         |  +--rw dot1agCfmMepTransmitLbmDataTlv?            binary

         |  +--rw dot1agCfmMepTransmitLbmVlanPriority?       int32

         |  +--rw dot1agCfmMepTransmitLbmVlanDropEnable?     boolean

         |  +--ro dot1agCfmMepTransmitLbmResultOK?           boolean

         |  +--ro dot1agCfmMepTransmitLbmSeqNumber?          uint32

         |  +--ro dot1agCfmMepTransmitLtmStatus?             boolean

         |  +--rw dot1agCfmMepTransmitLtmFlags?              bits

         |  +--rw dot1agCfmMepTransmitLtmTargetMacAddress?   yang:mac-
   address

         |  +--rw dot1agCfmMepTransmitLtmTargetMepId?
   cfm:Dot1agCfmMepIdOrZero

         |  +--rw dot1agCfmMepTransmitLtmTargetIsMepId?      boolean

         |  +--rw dot1agCfmMepTransmitLtmTtl?                uint32

         |  +--ro dot1agCfmMepTransmitLtmResult?             boolean

         |  +--ro dot1agCfmMepTransmitLtmSeqNumber?          uint32

         |  +--rw dot1agCfmMepTransmitLtmEgressIdentifier?   binary

         |  +--rw dot1agCfmMepRowStatus?
   cfm:RowStatus


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         +--rw dot1agCfmLtrEntry* [dot1agCfmMdIndex dot1agCfmMaIndex
   dot1agCfmMepIdentifier dot1agCfmLtrSeqNumber
   dot1agCfmLtrReceiveOrder]

         |  +--rw dot1agCfmMdIndex                       ->
   /dot1agCfmMd/dot1agCfmMdEntry/dot1agCfmMdIndex

         |  +--rw dot1agCfmMaIndex                       ->
   /dot1agCfmMa/dot1agCfmMaNetEntry/dot1agCfmMaIndex

         |  +--rw dot1agCfmMepIdentifier                 ->
   /dot1agCfmMep/dot1agCfmMepEntry/dot1agCfmMepIdentifier

         |  +--rw dot1agCfmLtrSeqNumber                  uint32

         |  +--rw dot1agCfmLtrReceiveOrder               uint32

         |  +--ro dot1agCfmLtrTtl?                       uint32

         |  +--ro dot1agCfmLtrForwarded?                 boolean

         |  +--ro dot1agCfmLtrTerminalMep?               boolean

         |  +--ro dot1agCfmLtrLastEgressIdentifier?      binary

         |  +--ro dot1agCfmLtrNextEgressIdentifier?      binary

         |  +--ro dot1agCfmLtrRelay?
   cfm:Dot1agCfmRelayActionFieldValue

         |  +--ro dot1agCfmLtrChassisIdSubtype?
   cfm:LldpChassisIdSubtype

         |  +--ro dot1agCfmLtrChassisId?
   cfm:LldpChassisId

         |  +--ro dot1agCfmLtrManAddressDomain?          cfm:TDomain

         |  +--ro dot1agCfmLtrManAddress?                cfm:TAddress

         |  +--ro dot1agCfmLtrIngress?
   cfm:Dot1agCfmIngressActionFieldValue

         |  +--ro dot1agCfmLtrIngressMac?                yang:mac-
   address




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         |  +--ro dot1agCfmLtrIngressPortIdSubtype?
   cfm:LldpPortIdSubtype

         |  +--ro dot1agCfmLtrIngressPortId?             cfm:LldpPortId

         |  +--ro dot1agCfmLtrEgress?
   cfm:Dot1agCfmEgressActionFieldValue

         |  +--ro dot1agCfmLtrEgressMac?                 yang:mac-
   address

         |  +--ro dot1agCfmLtrEgressPortIdSubtype?
   cfm:LldpPortIdSubtype

         |  +--ro dot1agCfmLtrEgressPortId?              cfm:LldpPortId

         |  +--ro dot1agCfmLtrOrganizationSpecificTlv?   binary

         +--rw dot1agCfmMepDbEntry* [dot1agCfmMdIndex dot1agCfmMaIndex
   dot1agCfmMepIdentifier dot1agCfmMepDbRMepIdentifier]

            +--rw dot1agCfmMdIndex                    ->
   /dot1agCfmMd/dot1agCfmMdEntry/dot1agCfmMdIndex

            +--rw dot1agCfmMaIndex                    ->
   /dot1agCfmMa/dot1agCfmMaNetEntry/dot1agCfmMaIndex

            +--rw dot1agCfmMepIdentifier              ->
   /dot1agCfmMep/dot1agCfmMepEntry/dot1agCfmMepIdentifier

            +--rw dot1agCfmMepDbRMepIdentifier        cfm:Dot1agCfmMepId

            +--ro dot1agCfmMepDbRMepState?
   cfm:Dot1agCfmRemoteMepState

            +--ro dot1agCfmMepDbRMepFailedOkTime?     yang:timestamp

            +--ro dot1agCfmMepDbMacAddress?           yang:mac-address

            +--ro dot1agCfmMepDbRdi?                  boolean

            +--ro dot1agCfmMepDbPortStatusTlv?
   cfm:Dot1agCfmPortStatus

            +--ro dot1agCfmMepDbInterfaceStatusTlv?
   cfm:Dot1agCfmInterfaceStatus



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            +--ro dot1agCfmMepDbChassisIdSubtype?
   cfm:LldpChassisIdSubtype

            +--ro dot1agCfmMepDbChassisId?            cfm:LldpChassisId

            +--ro dot1agCfmMepDbManAddressDomain?     cfm:TDomain

            +--ro dot1agCfmMepDbManAddress?           cfm:TAddress

2.9. CFM FAULT ALARM NOTIFICAITON

   When there is fault alarm generated or cleared by the MEP fault
   notification generator state machine, the notification is sent to the
   management entity.

      notification dot1agCfmFaultAlarm {

         description

           "A MEP has a persistent defect condition. A notification

            (fault alarm) is sent to the management entity with the OID

            of the MEP that has detected the fault.



            Whenever a MEP has a persistent defect,

            it may or may not generate a Fault Alarm to warn the system

            administrator of the problem, as controlled by the MEP

            Fault Notification Generator State Machine and associated

            Managed Objects. Only the highest-priority defect, as shown

            in Table 20-1, is reported in the Fault Alarm.



            If a defect with a higher priority is raised after a Fault

            Alarm has been issued, another Fault Alarm is issued.





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            The management entity receiving the notification can

            identify the system from the network source address of the

            notification, and can identify the MEP reporting the defect

            by the indices in the OID of the dot1agCfmMepHighestPrDefect

            variable in the notification:



               dot1agCfmMdIndex - Also the index of the MEP's

                                  Maintenance Domain table entry

                                  (dot1agCfmMdTable).

               dot1agCfmMaIndex - Also an index (with the MD table

                                  index) of the MEP's Maintenance

                                  Association network table entry

                                  (dot1agCfmMaNetTable), and (with the

                                  MD table index and component ID) of

                                  the MEP's MA component table entry

                                  (dot1agCfmMaCompTable).

               dot1agCfmMepIdentifier - MEP Identifier and final index

                                  into the MEP table

                                  (dot1agCfmMepTable).";

         reference

           "802.1ag clause 12.14.7.7";



         container dot1agCfmFaultAlarm-dot1agCfmMepHighestPrDefect {

           description


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            "The highest priority defect that has been present since the

             MEPs Fault Notification Generator State Machine was last in

             the FNG_RESET state";



            leaf dot1agCfmMdIndex {

               type leafref {

                  path "/cfm:dot1agCfmMd/cfm:dot1agCfmMdEntry/cfm"

                  +":dot1agCfmMdIndex";

               }

               description

                 "Automagically generated leafref leaf.";

            }

            leaf dot1agCfmMaIndex {

               type leafref {

                  path "/cfm:dot1agCfmMa/cfm:dot1agCfmMaNetEntry/cfm"

                  +":dot1agCfmMaIndex";

               }

               description

                 "Automagically generated leafref leaf.";

            }

            leaf dot1agCfmMepIdentifier {

               type leafref {

                  path "/cfm:dot1agCfmMep/cfm:dot1agCfmMepEntry/cfm"

             +":dot1agCfmMepIdentifier";


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               }

               description

                 "Automagically generated leafref leaf.";

            }

            leaf dot1agCfmMepHighestPrDefect {

               type cfm:Dot1agCfmHighestDefectPri;

               description

                 "The highest priority defect that has been present

                  since the MEPs Fault Notification Generator State

                  Machine was last in the FNG_RESET state.";

               reference

                 "802.1ag clause 12.14.7.1.3:n  20.33.9 and Table 21-1";

            }

         }



      }

3. CFM YANG Module

   <CODE BEGINS> file ietf-cfm@2017-03-20.yang
   module ietf-cfm {

      /*** NAMESPACE / PREFIX DEFINITION ***/

      namespace "urn:ietf:params:xml:ns:yang:ietf-cfm";
      prefix "cfm";

      /*** LINKAGE (IMPORTS / INCLUDES) ***/

      import ietf-interfaces   { prefix "if"; }
      import ietf-yang-smiv2   { prefix "smi"; }
      import ietf-yang-types   { prefix "yang"; }


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      /*** META INFORMATION ***/

      organization
        "IETF NETMOD (NETCONF Data Modeling Language) Working Group";

      contact
        "WG Web:   <http://tools.ietf.org/wg/netmod/>
         WG List:  <mailto:netmod@ietf.org>

         WG Chair: Thomas Nadeau
                 <mailto:tnadeau@lucidvision.com>

         WG Chair: Juergen Schoenwaelder
                 <mailto:j.schoenwaelder@jacobs-university.de>

         Editor:   Kun Wang
                  <kun.s.wang@ericsson.com>
                   Alex Wang
                  <alex.g.wang@ericsson.com>
                   Chin Chen
                  <chin.chen@ericsson.com>
                   Hua Lv
                  <hua.lv@ericsson.com>";
      description
        "This module contains a collection of YANG definitions for
         Connectivity Fault Management.

         Copyright (c) 2017 IETF Trust and the persons identified as
         authors of the code.  All rights reserved.

         Redistribution and use in source and binary forms, with or
         without modification, is permitted pursuant to, and subject
         to the license terms contained in, the Simplified BSD License
         set forth in Section 4.c of the IETF Trust's Legal Provisions
         Relating to IETF Documents
        (http://trustee.ietf.org/license-info).";

      revision "2017-03-29" {
         description
           "01 revision.";
         reference
         "RFC rfc6020";
      }

      /*** TYPE DEFINITIONS ***/



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     typedef if-index {
       type leafref {
         path "/if:interfaces-state/if:interface/if:if-index";
       }
       description
         "This type is used by data models that need to reference
          configured interfaces.";
     }

      typedef if-index-or-zero {
         type int32 {
            range "0..2147483647";
         }
         description
           "This textual convention is an extension of the
            InterfaceIndex convention.  The latter defines a greater
            than zero value used to identify an interface or interface
            sub-layer in the managed system.  This extension permits the
            additional value of zero.  the value zero is object-specific
            and must therefore be defined as part of the description of
            any object which uses this syntax.  Examples of the usage of
            zero might include situations where interface was unknown,
            or when none or all interfaces need to be referenced.";
      }

      typedef VlanId {
         type int32 {
            range "1..4094";
         }
         description
           "The VLAN-ID that uniquely identifies a VLAN.  This
            is the 12-bit VLAN-ID used in the VLAN Tag header.
            The range is defined by the REFERENCEd specification.";
      }

      typedef VlanIdOrNone {
         type int32 {
            range "0..4094";
         }
         description
           "The VLAN-ID that uniquely identifies a specific VLAN,
            or no VLAN.  The special value of zero is used to
            indicate that no VLAN-ID is present or used.  This can
            be used in any situation where an object or a table entry
            must refer either to a specific VLAN, or to no VLAN.

            Note that a MIB object that is defined using this


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            TEXTUAL-CONVENTION should clarify the meaning of
            'no VLAN' (i.e., the special value 0).";
      }

      typedef LldpChassisIdSubtype {
         type enumeration {
            enum chassisComponent     {
               value 1;
               description
               "If the associated LldpChassisIdSubtype object has a
                value of 'chassisComponent(1)', then the octet string
                identifies a particular instance of the
                entPhysicalAlias object (defined in IETF RFC 2737)
                for a chassis component (i.e.an entPhysicalClass
                value of 'chassis(3)').";
            }
            enum interfaceAlias       {
               value 2;
               description
               "If the associated LldpChassisIdSubtype object has a
                value of 'interfaceAlias(2)', then the octet string
                identifies a particular instance of the ifAlias object
                (defined in IETF RFC 2863) for an interface on the
                containing chassis. If the particular ifAlias object
                does not contain any values, another chassis
                identifier type should be used.";
            }
            enum portComponent        {
               value 3;
               description
               "If the associated LldpChassisIdSubtype object has a
                value of 'portComponent(3)', then the octet string
                identifies a particular instance of the
                entPhysicalAlias object (defined in IETF RFC 2737)
                for a port or backplane component within the containing
                chassis.";
            }
            enum macAddress           {
               value 4;
               description
               "If the associated LldpChassisIdSubtype object has a
                value of 'macAddress(4)', then this string identifies
                a particular unicast source address (encoded in network
                byte order and IEEE 802.3 canonical bit order), of a
                port on the containing chassis as defined in IEEE Std
                802-2001.";
            }


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            enum networkAddress       {
               value 5;
               description
               "If the associated LldpChassisIdSubtype object has a
                value of 'networkAddress(5)', then this string
                identifies a particular network address, encoded in
                network byte order, associated with one or more ports
                on the containing chassis.  The first octet contains
                the IANA Address Family Numbers enumeration value for
                the specific address type, and octets 2 through N
                contain the network address value in network byte
                order.";
            }
            enum interfaceName        {
               value 6;
               description
               "If the associated LldpChassisIdSubtype object has a
                value of 'interfaceName(6)', then the octet string
                identifies a particular instance of the ifName object
                (defined in IETF RFC 2863) for an interface on the
                containing chassis. If the particular ifName object
                does not contain any values, another chassis identifier
                type should be used.";
            }
            enum local                {
               value 7;
               description
               "If the associated LldpChassisIdSubtype object has a
                value of 'local(7)', then this string identifies a
                locally assigned Chassis ID.";
             }
         }
         description
         "This describes the format of a chassis identifier string.
          Objects of this type are always used with an associated
          LldpChassisIdSubtype object, which identifies the format of
          the particular LldpChassisId object instance.";
      }

      typedef LldpChassisId {
         type int32 {
            range "1..255";
         }
         description
         "This describes the format of a chassis identifier string.
          Objects of this type are always used with an associated
          LldpChassisIdSubtype object, which identifies the format of


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          the particular LldpChassisId object instance.

          If the associated LldpChassisIdSubtype object has a value of
          'chassisComponent(1)', then the octet string identifies
          a particular instance of the entPhysicalAlias object
          (defined in IETF RFC 2737) for a chassis component (i.e.,
          an entPhysicalClass value of 'chassis(3)').

          If the associated LldpChassisIdSubtype object has a value
          of 'interfaceAlias(2)', then the octet string identifies
          a particular instance of the ifAlias object (defined in
          IETF RFC 2863) for an interface on the containing chassis.
          If the particular ifAlias object does not contain any values,
          another chassis identifier type should be used.

          If the associated LldpChassisIdSubtype object has a value
          of 'portComponent(3)', then the octet string identifies a
          particular instance of the entPhysicalAlias object (defined
          in IETF RFC 2737) for a port or backplane component within
          the containing chassis.

          If the associated LldpChassisIdSubtype object has a value of
          'macAddress(4)', then this string identifies a particular
          unicast source address (encoded in network byte order and
          IEEE 802.3 canonical bit order), of a port on the containing
          chassis as defined in IEEE Std 802-2001.

          If the associated LldpChassisIdSubtype object has a value of
          'networkAddress(5)', then this string identifies a particular
          network address, encoded in network byte order, associated
          with one or more ports on the containing chassis.  The first
          octet contains the IANA Address Family Numbers enumeration
          value for the specific address type, and octets 2 through
          N contain the network address value in network byte order.

          If the associated LldpChassisIdSubtype object has a value
          of 'interfaceName(6)', then the octet string identifies
          a particular instance of the ifName object (defined in
          IETF RFC 2863) for an interface on the containing chassis.
          If the particular ifName object does not contain any values,
          another chassis identifier type should be used.

          If the associated LldpChassisIdSubtype object has a value of
          'local(7)', then this string identifies a locally assigned
          Chassis ID.";
      }



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      typedef LldpPortIdSubtype {
         type enumeration {
            enum interfaceAlias      {
               value 1;
               description
               "a port identifier based on the ifAlias MIB object,
                defined in IETF RFC 2863.";
            }
            enum portComponent       {
               value 2;
               description
               "a port identifier based on the value of
                entPhysicalAlias (defined in IETF RFC 2737) for a port
                component (i.e., entPhysicalClass value of 'port(10)'),
                within the containing chassis.";
            }
            enum macAddress          {
               value 3;
               description
               "a port identifier based on a unicast source address
                (encoded in network byte order and IEEE 802.3 canonical
                 bit order), which has been detected by the agent and
                 associated with a particular port
                 (IEEE Std 802-2001).";
            }
            enum networkAddress      {
               value 4;
               description
               "a port identifier based on a network address, detected
                by the agent and associated with a particular port.";
            }
            enum interfaceName       {
               value 5;
               description
               "a port identifier based on the ifName MIB object,
                defined in IETF RFC 2863.";
            }
            enum agentCircuitId      {
               value 6;
               description
               "a port identifier based on the agent-local identifier
                of the circuit (defined in RFC 3046), detected by the
                agent and associated with a particular port.";
            }
            enum local               {
               value 7;
               description


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               "a port identifier based on a value locally assigned.";
            }
        }
        description
          "This describes the source of a particular type of port
           identifier used in the LLDP MIB.";
      }

      typedef LldpPortId {
         type int32 {
            range "1..255";
         }
         description
          "This describes the format of a port identifier string.
          Objects of this type are always used with an associated
          LldpPortIdSubtype object, which identifies the format of the
          particular LldpPortId object instance.

          If the associated LldpPortIdSubtype object has a value of
          'interfaceAlias(1)', then the octet string identifies a
          particular instance of the ifAlias object (defined in IETF
          RFC 2863).  If the particular ifAlias object does not contain
          any values, another port identifier type should be used.

          If the associated LldpPortIdSubtype object has a value of
          'portComponent(2)', then the octet string identifies a
          particular instance of the entPhysicalAlias object (defined
          in IETF RFC 2737) for a port or backplane component.

          If the associated LldpPortIdSubtype object has a value of
          'macAddress(3)', then this string identifies a particular
          unicast source address (encoded in network byte order
          and IEEE 802.3 canonical bit order) associated with the port
          (IEEE Std 802-2001).

          If the associated LldpPortIdSubtype object has a value of
          'networkAddress(4)', then this string identifies a network
          address associated with the port.  The first octet contains
          the IANA AddressFamilyNumbers enumeration value for the
          specific address type, and octets 2 through N contain the
          networkAddress address value in network byte order.

          If the associated LldpPortIdSubtype object has a value of
          'interfaceName(5)', then the octet string identifies a
          particular instance of the ifName object (defined in IETF
          RFC 2863).  If the particular ifName object does not contain
          any values, another port identifier type should be used.


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          If the associated LldpPortIdSubtype object has a value of
          'agentCircuitId(6)', then this string identifies a agent-local
          identifier of the circuit (defined in RFC 3046).

          If the associated LldpPortIdSubtype object has a value of
          'local(7)', then this string identifies a locally
          assigned port ID.";
      }

      typedef RowStatus {
         type enumeration {
            enum active        {
               value 1;
               description
               "The conceptual row is available for use by the managed
                device."; }
            enum notInService  {
               value 2;
               description
               "The conceptual row exists in the agent, but is
                unavailable for use by the managed device;
                'notInService' has no implication regarding the
                internal consistency of the row, availability of
                resources, or consistency with the current state of
                the managed device."; }
            enum notReady      {
               value 3;
               description
               "The conceptual row exists in the agent, but is missing
                information necessary in order to be available for use
                by the managed device (i.e., one or more required
                columns in the conceptual row have not been
                instanciated."; }
            enum createAndGo   {
               value 4;
               description
               "It is supplied by a management station wishing to create
                a new instance of a conceptual row and to have its
                status automatically set to active, making it available
                for use by the managed device."; }
            enum createAndWait {
               value 5;
               description
               "It is supplied by a management station wishing to create
                a new instance of a conceptual row (but not make it
                available for use by the managed device."; }


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            enum destroy       {
               value 6;
               description
               "It is supplied by a management station wishing to
                delete all of the instances associated with an
                existing conceptual row."; }
         }
         description
           "The RowStatus textual convention is used to manage the
            creation and deletion of conceptual rows, and is used as the
            value of the SYNTAX clause for the status column of a
            conceptual row.
            The status column has six defined values:

            Whereas five of the six values (all except `notReady') may
            be specified in a management protocol set operation, only
            three values will be returned in response to a management
            protocol retrieval operation:  `notReady', `notInService' or
            `active'.  That is, when queried, an existing conceptual row
            has only three states:  it is either available for use by
            the managed device (the status column has value `active');
            it is not available for use by the managed device, though
            the agent has sufficient information to attempt to make it
            so (the status column has value `notInService'); or, it is
            not available for use by the managed device, and an attempt
            to make it so would fail because the agent has insufficient
            information (the state column has value `notReady').";
      }

      typedef TimeInterval {
         type int32 {
            range "0..2147483647";
         }
         description
           "A period of time, measured in units of 0.01 seconds.";
      }

      typedef TDomain {
         type yang:object-identifier;
         description
           "Denotes a kind of transport service.

            Some possible values, such as snmpUDPDomain, are defined in
            the SNMPv2-TM MIB module.  Other possible values are defined
            in other MIB modules.";
         reference
           "The SNMPv2-TM MIB module is defined in RFC 1906.";


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      }

      typedef TAddress {
         type binary {
            length "1..255";
         }
         description
           "Denotes a transport service address.

            A TAddress value is always interpreted within the context
            of a TDomain value.  Thus, each definition of a TDomain
            value must be accompanied by a definition of a textual
            convention for use with that TDomain.";
      }

      typedef Dot1agCfmMaintDomainNameType {
         type enumeration {
            enum none              {
               value 1;
               description
               "No format specified, usually because there is not (yet)
                a Maintenance Domain Name. In this case, a zero length
                OCTET STRING for the Domain Name field is acceptable.";
            }
            enum dnsLikeName       {
               value 2;
               description
               "Domain Name like string, globally unique text string
                derived from a DNS name.";
            }
            enum macAddressAndUint {
               value 3;
               description
               "MAC address + 2-octet (unsigned) integer.";
            }
            enum charString        {
               value 4;
               description
               "RFC2579 DisplayString, except that the character codes
                0-31 (decimal) are not used.";
            }
         }
         description
           "A value that represents a type (and thereby the format)
            of a Dot1agCfmMaintDomainName.

            To support future extensions, the


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            Dot1agCfmMaintDomainNameType textual convention SHOULD NOT
            be sub-typed in object type definitions.  It MAY be
            sub-typed in compliance statements in order to require only
            a subset of these address types for a compliant
            implementation.

            Implementations must ensure that
            Dot1agCfmMaintDomainNameType objects and any dependent
            objects (e.g., Dot1agCfmMaintDomainName objects) are
            consistent.  An inconsistentValue error must be generated
            if an attempt to change an Dot1agCfmMaintDomainNameType
            object would, for example, lead to an undefined
            Dot1agCfmMaintDomainName value.
            In particular,
            Dot1agCfmMaintDomainNameType/Dot1agCfmMaintDomainName pairs
            must be changed together if the nameType changes.";
         reference
           "802.1ag clause 21.6.5, Table 21-19";
      }

      typedef Dot1agCfmMaintDomainName {
         type binary {
            length "1..43";
         }
         description
           "Denotes a generic Maintenance Domain Name.

            A Dot1agCfmMaintDomainName value is interpreted within
            the context of a Dot1agCfmMaintDomainNameType value.  Every
            usage of the Dot1agCfmMaintDomainName textual convention is
            required to specify the Dot1agCfmMaintDomainNameType object
            that provides the context.  It is suggested that the
            Dot1agCfmMaintDomainNameType object be logically registered
            before the object(s) that use the Dot1agCfmMaintDomainName
            textual convention, if they appear in the same logical row.

            The value of a Dot1agCfmMaintDomainName object must always
            be consistent with the value of the associated
            Dot1agCfmMaintDomainNameType object. Attempts to set
            an Dot1agCfmMaintDomainName object to a value inconsistent
            with the associated Dot1agCfmMaintDomainNameType must fail
            with an inconsistentValue error.

            When this textual convention is used as the syntax of an
            index object, there may be issues with the limit of 128
            sub-identifiers specified in SMIv2, IETF STD 58.  In this
            case, the object definition MUST include a 'SIZE' clause


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            to limit the number of potential instance sub-identifiers;
            otherwise the applicable constraints MUST be stated in
            the appropriate conceptual row DESCRIPTION clauses, or
            in the surrounding documentation if there is no single
            DESCRIPTION clause that is appropriate.

            A value of none(1) in the associated
            Dot1agCfmMaintDomainNameType object means that no
            Maintenance Domain name is present, and the contents of the
            Dot1agCfmMaintDomainName object are meaningless.

            See the DESCRIPTION of the Dot1agCfmMaintAssocNameType
            TEXTUAL-CONVENTION for a discussion of the length limits on
            the Maintenance Domain name and Maintenance Association
            name.";
         reference
           "802.1ag clause 21.6.5";
      }

      typedef Dot1agCfmMaintAssocNameType {
         type enumeration {
            enum primaryVid    {
               value 1;
               description
               "Primary VLAN ID";
            }
            enum charString    {
               value 2;
               description
               "display string";
            }
            enum unsignedInt16 {
               value 3;
               description
               "2-octet integer/big endian";
            }
            enum rfc2865VpnId  {
               value 4;
               description
               "RFC 2685 VPN ID";
            }
         }
         description
           "A value that represents a type (and thereby the format)
            of a Dot1agCfmMaintAssocName.  The value can be one of
            the following:



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            ieeeReserved(0)   Reserved for definition by IEEE 802.1
                              recommend to not use zero unless
                              absolutely needed.
            primaryVid(1)     Primary VLAN ID.
                              12 bits represented in a 2-octet integer:
                              - 4 least significant bits of the first
                                byte contains the 4 most significant
                                bits of the 12 bits primary VID
                              - second byte contains the 8 least
                                significant bits of the primary VID

                                     0 1 2 3 4 5 6 7 8
                                     +-+-+-+-+-+-+-+-+
                                     |0 0 0 0| (MSB) |
                                     +-+-+-+-+-+-+-+-+
                                     |  VID   LSB    |
                                     +-+-+-+-+-+-+-+-+

            charString(2)     RFC2579 DisplayString, except that the
                              character codes 0-31 (decimal) are not
                              used. (1..45) octets
            unsignedInt16 (3) 2-octet integer/big endian
            rfc2865VpnId(4)   RFC 2685 VPN ID
                              3 octet VPN authority Organizationally
                              Unique Identifier followed by 4 octet VPN
                              index identifying VPN according to the
                              OUI:

                                     0 1 2 3 4 5 6 7 8
                                     +-+-+-+-+-+-+-+-+
                                     | VPN OUI (MSB) |
                                     +-+-+-+-+-+-+-+-+
                                     |   VPN OUI     |
                                     +-+-+-+-+-+-+-+-+
                                     | VPN OUI (LSB) |
                                     +-+-+-+-+-+-+-+-+
                                     |VPN Index (MSB)|
                                     +-+-+-+-+-+-+-+-+
                                     |  VPN Index    |
                                     +-+-+-+-+-+-+-+-+
                                     |  VPN Index    |
                                     +-+-+-+-+-+-+-+-+
                                     |VPN Index (LSB)|
                                     +-+-+-+-+-+-+-+-+

            ieeeReserved(xx)  Reserved for definition by IEEE 802.1
                              xx values can be [5..31] and [64..255]


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            ituReserved(xx)   Reserved for definition by  ITU-T Y.1731
                              xx values range from [32..63]

            To support future extensions, the
            Dot1agCfmMaintAssocNameType textual convention SHOULD NOT
            be sub-typed in object type definitions. It MAY be
            sub-typed in compliance statements in order to require
            only a subset of these address types for a compliant
            implementation.

            Implementations must ensure that Dot1agCfmMaintAssocNameType
            objects and any dependent objects (e.g.,
            Dot1agCfmMaintAssocName objects) are consistent.  An
            inconsistentValue error must be generated if an attempt to
            change an Dot1agCfmMaintAssocNameType object would, for
            example, lead to an undefined Dot1agCfmMaintAssocName value.
            In particular,
            Dot1agCfmMaintAssocNameType/Dot1agCfmMaintAssocName pairs
            must be changed together if the nameType changes.

            The Maintenance Domain name and Maintenance Association
            name,when put together into the CCM PDU, MUST total 48
            octets or less.If the Dot1agCfmMaintDomainNameType
            object contains none(1), then the Dot1agCfmMaintAssocName
            object MUST be 45 octets or less in length.  Otherwise,
            the length of the Dot1agCfmMaintDomainName object plus the
            length of the Dot1agCfmMaintAssocName object, added
            together, MUST total less than or equal to 44 octets.";
         reference
           "802.1ag clause 21.6.5.4, Table 21-20";
      }

      typedef Dot1agCfmMaintAssocName {
         type binary {
            length "1..45";
         }
         description
           "Denotes a generic Maintenance Association Name. It is the
            part of the Maintenance Association Identifier which is
            unique within the Maintenance Domain Name and is appended
            to the Maintenance Domain Name to form the Maintenance
            Association Identifier (MAID).

            A Dot1agCfmMaintAssocName value is always interpreted within
            the context of a Dot1agCfmMaintAssocNameType value.  Every
            usage of the Dot1agCfmMaintAssocName textual convention is
            required to specify the Dot1agCfmMaintAssocNameType object


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            that provides the context.  It is suggested that the
            Dot1agCfmMaintAssocNameType object be logically registered
            before the object(s) that use the Dot1agCfmMaintAssocName
            textual convention, if they appear in the same logical row.

            The value of a Dot1agCfmMaintAssocName object must
            always be consistent with the value of the associated
            Dot1agCfmMaintAssocNameType object. Attempts to set
            an Dot1agCfmMaintAssocName object to a value inconsistent
            with the associated Dot1agCfmMaintAssocNameType must fail
            with an inconsistentValue error.

            When this textual convention is used as the syntax of an
            index object, there may be issues with the limit of 128
            sub-identifiers specified in SMIv2, IETF STD 58.  In this
            case, the object definition MUST include a 'SIZE' clause
            to limit the number of potential instance sub-identifiers;
            otherwise the applicable constraints MUST be stated in
            the appropriate conceptual row DESCRIPTION clauses, or
            in the surrounding documentation if there is no single
            DESCRIPTION clause that is appropriate.";
         reference
           "802.1ag clauses 21.6.5.4, 21.6.5.5, 21.6.5.6";
      }

      typedef Dot1agCfmMDLevel {
         type int32 {
            range "0..7";
         }
         description
           "Integer identifying the Maintenance Domain Level (MD Level).
            Higher numbers correspond to higher Maintenance Domains,
            those with the greatest physical reach, with the highest
            values for customers' CFM PDUs.  Lower numbers correspond
            to lower Maintenance Domains, those with more limited
            physical reach, with the lowest values for CFM PDUs
            protecting single bridges or physical links.";
         reference
           "802.1ag clauses 18.3, 21.4.1";
         smi:display-hint "d";
      }

      typedef Dot1agCfmMDLevelOrNone {
         type int32 {
            range "-1..7";
         }
         description


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           "Integer identifying the Maintenance Domain Level (MD Level).
            Higher numbers correspond to higher Maintenance Domains,
            those with the greatest physical reach, with the highest
            values for customers' CFM packets.  Lower numbers correspond
            to lower Maintenance Domains, those with more limited
            physical reach, with the lowest values for CFM PDUs
            protecting single bridges or physical links.

            The value (-1) is reserved to indicate that no MA Level has
            been assigned.";
         reference
           "802.1ag clauses 18.3, 12.14.3.1.3:c";
         smi:display-hint "d";
      }

      typedef Dot1agCfmMpDirection {
         type enumeration {
            enum down {
               value 1;
               description
               "Sends Continuity Check Messages away from the MAC Relay
                Entity.";
            }
            enum up   {
               value 2;
               description
               "Sends Continuity Check Messages towards the MAC Relay
                Entity."; }
         }
         description
           "Indicates the direction in which the Maintenance
            association (MEP or MIP) faces on the bridge port.";

         reference
           "802.1ag clauses 12.14.6.3.2:c";
      }

      typedef Dot1agCfmPortStatus {
         type enumeration {
            enum psNoPortStateTLV {
               value 0;
               description
               "Indicates either that no CCM has been received or
                that no port status TLV was present in the last
                CCM received.";
            }
            enum psBlocked        {


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               value 1;
               description
               "Ordinary data cannot pass freely through the port
                on which the remote MEP resides. Value of
                enableRmepDefect is equal to false.";
            }
            enum psUp             {
               value 2;
               description
               "Ordinary data can pass freely through the port on which
                the remote MEP resides. Value of enableRmepDefect is
                equal to true.";
            }
         }
         description
           "An enumerated value from he Port Status TLV from the last
            CCM received from the last MEP. It indicates the ability
            of the Bridge Port on which the transmitting MEP resides
            to pass ordinary data, regardless of the status of the MAC
            (Table 21-10).

            NOTE: A 0 value is used for psNoPortStateTLV, so that
                  additional code points can be added in a manner
                  consistent with the Dot1agCfmInterfaceStatus textual
                  convention.";
         reference
           "802.1ag clause 12.14.7.6.3:f, 20.19.3 and 21.5.4";
      }

      typedef Dot1agCfmInterfaceStatus {
         type enumeration {
            enum isNoInterfaceStatusTLV {
               value 0;
               description
               "Indicates either that no CCM has been received or
                that no interface status TLV was present in the last
                CCM received.";
            }
            enum isUp                   {
               value 1;
               description
               "The interface is ready to pass packets.";
            }
            enum isDown                 {
               value 2;
               description
               "The interface cannot pass packets";


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            }
            enum isTesting              {
               value 3;
               description
               "The interface is in some test mode.";
            }
            enum isUnknown              {
               value 4;
               description
               "The interface status cannot be determined for some
                reason.";
            }
            enum isDormant              {
               value 5;
               description
               "The interface is not in a state to pass packets but
                is in a pending state, waiting for some external
                event.";
            }
            enum isNotPresent           {
               value 6;
               description
               "Some component of the interface is missing";
            }
            enum isLowerLayerDown       {
               value 7;
               description
               "The interface is down due to state of the lower
                layer interfaces";
            }
         }
         description
           "An enumerated value from the Interface Status TLV from the
            last CCM received from the last MEP. It indicates the status
            of the Interface within which the MEP transmitting the CCM
            is configured, or the next lower Interface in the Interface
            Stack, if the MEP is not configured within an Interface.

            NOTE: A 0 value is used for isNoInterfaceStatusTLV, so that
                  these code points can be kept consistent with new code
                  points added to ifOperStatus in the IF-MIB.";
         reference
           "802.1ag clause 12.14.7.6.3:g, 20.19.4 and 21.5.5";
      }

      typedef Dot1agCfmHighestDefectPri {
         type enumeration {


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            enum none         {
               value 0;
               description
               "no defects since FNG_RESET";
            }
            enum defRDICCM    {
               value 1;
               description
               "DefRDICCM";
            }
            enum defMACstatus {
               value 2;
               description
               "DefMACstatus";
            }
            enum defRemoteCCM {
               value 3;
               description
               "DefRemoteCCM";
            }
            enum defErrorCCM  {
               value 4;
               description
               "DefErrorCCM";
            }
            enum defXconCCM   {
               value 5;
               description
               "DefXconCCM";
            }
         }
         description
           "An enumerated value, equal to the contents of the variable
            highestDefect (20.33.9 and Table 20-1), indicating the
            highest-priority defect that has been present since the MEP
            Fault Notification Generator State Machine was last in the
            FNG_RESET state, either:

            none(0)           no defects since FNG_RESET
            defRDICCM(1)      DefRDICCM
            defMACstatus(2)   DefMACstatus
            defRemoteCCM(3)   DefRemoteCCM
            defErrorCCM(4)    DefErrorCCM
            defXconCCM(5)     DefXconCCM

            The value 0 is used for no defects so that additional higher
            priority values can be added, if needed, at a later time,


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            and so that these values correspond with those in
            Dot1agCfmLowestAlarmPri.";
         reference
           "802.1ag clause 20.1.2, 12.14.7.7.2:c and 20.33.9";
      }

      typedef Dot1agCfmLowestAlarmPri {
         type enumeration {
            enum allDef        {
               value 1;
               description
               "DefRDICCM, DefMACstatus, DefRemoteCCM, DefErrorCCM
                and DefXconCCM";
            }
            enum macRemErrXcon {
               value 2;
               description
               "Only DefMACstatus, DefRemoteCCM, DefErrorCCM, and
                DefXconCCM (default)";
            }
            enum remErrXcon    {
               value 3;
               description
               "Only DefRemoteCCM, DefErrorCCM, and DefXconCCM";
            }
            enum errXcon       {
               value 4;
               description
               "Only DefErrorCCM and DefXconCCM";
            }
            enum xcon          {
               value 5;
               description
               "Only DefXconCCM";
            }
            enum noXcon        {
               value 6;
               description
               "No defects DefXcon or lower are to be reported";
            }
         }
         description
           "An integer value specifying the lowest priority defect
            that is allowed to generate a Fault Alarm (20.9.5)";
         reference
           "802.1ag clause 12.14.7.1.3:k and 20.9.5";
      }


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      typedef Dot1agCfmMepId {
         type uint32 {
            range "1..8191";
         }
         description
           "Maintenance association End Point Identifier (MEPID):
            A small integer, unique over a given Maintenance
            Association, identifying a specific MEP.";
         reference
           "802.1ag clauses 3.18 and 19.2.1";
         smi:display-hint "d";
      }

      typedef Dot1agCfmMepIdOrZero {
         type uint32 {
            range "0..8191";
         }
         description
           "Maintenance association End Point Identifier (MEPID):
            A small integer, unique over a given Maintenance
            Association, identifying a specific MEP.

            The special value 0 is allowed to indicate special cases,
            for example that no MEPID is configured.

            Whenever an object is defined with this SYNTAX, then the
            DESCRIPTION clause of such an object MUST specify what the
            special value of 0 means.";
         reference
           "802.1ag clause 19.2.1";
         smi:display-hint "d";
      }

      typedef Dot1agCfmMhfCreation {
         type enumeration {
            enum defMHFnone     {
               value 1;
               description
               "No MHFs can be created for this VID.";
            }
            enum defMHFdefault  {
               value 2;
               description
               "MHFs can be created on this VID on any Bridge port
                through which this VID can pass.";
            }


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            enum defMHFexplicit {
               value 3;
               description
               "MHFs can be created for this VID only on Bridge ports
                through which this VID can pass, and only if a MEP is
                created at some lower MD Level.";
            }
            enum defMHFdefer    {
               value 4;
               description
               "The creation of MHFs is determined by the corresponding
                Maintenance Domain variable
                (dot1agCfmMaCompMhfCreation).";
            }
         }
         description
           "Indicates if the Management Entity can create MHFs.";
         reference
           "802.1ag clause 12.14.5.1.3:c and 22.2.3";
      }

      typedef Dot1agCfmIdPermission {
         type enumeration {
            enum sendIdNone          {
               value 1;
               description
               "The Sender ID TLV is not to be sent.";
            }
            enum sendIdChassis       {
               value 2;
               description
               "The Chassis ID Length, Chassis ID Subtype, and Chassis
                ID fields of  the Sender ID TLV are to be sent.";
            }
            enum sendIdManage        {
               value 3;
               description
               "The Management Address Length and Management Address
                of the Sender ID TLV are to be sent.";
            }
            enum sendIdChassisManage {
               value 4;
               description
               "The Chassis ID Length, Chassis ID Subtype, Chassis ID,
                Management Address Length and Management Address
                fields are all to be sent.";
            }


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            enum sendIdDefer         {
               value 5;
               description
               "The contents of the Sender ID TLV are determined by
                the corresponding Maintenance Domain variable
                (dot1agCfmMaCompIdPermission).";
            }
         }
         description
           "Indicates what, if anything, is to be included in the Sender
            ID TLV transmitted in CCMs, LBMs, LTMs, and LTRs.";
         reference
           "802.1ag clause 12.14.6.1.3:d and 21.5.3";
      }

      typedef Dot1agCfmCcmInterval {
         type enumeration {
            enum intervalInvalid {
               value 0;
               description
               "No CCMs are sent (disabled).";
            }
            enum interval300Hz   {
               value 1;
               description
               "CCMs are sent every 3 1/3 milliseconds (300Hz).";
            }
            enum interval10ms    {
               value 2;
               description
               "CCMs are sent every 10 milliseconds.";
            }
            enum interval100ms   {
               value 3;
               description
               "CCMs are sent every 100 milliseconds.";
            }
            enum interval1s      {
               value 4;
               description
               "CCMs are sent every 1 second.";
            }
            enum interval10s     {
               value 5;
               description
               "CCMs are sent every 10 seconds.";
            }


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            enum interval1min    {
               value 6;
               description
               "CCMs are sent every minute.";
            }
            enum interval10min   {
               value 7;
               description
               "CCMs are sent every 10 minutes.";
            }
         }
         description
           "Indicates the interval at which CCMs are sent by a MEP.

            Note: enumerations start at zero to match the 'CCM Interval
                  field' protocol field.";
         reference
           "802.1ag clauses 12.14.6.1.3:e, 20.8.1 and 21.6.1.3";
      }

      typedef Dot1agCfmFngState {
         type enumeration {
            enum fngReset          {
               value 1;
               description
               "No defect has been present since the
                dot1agCfmMepFngResetTime timer expired, or since the
                state machine was last reset.";
            }
            enum fngDefect         {
               value 2;
               description
               "A defect is present, but not for a long enough time
                to be reported (dot1agCfmMepFngAlarmTime).";
            }
            enum fngReportDefect   {
               value 3;
               description
               "A momentary state during which the defect is reported
                by sending a dot1agCfmFaultAlarm notification, if that
                action is enabled.";
            }
            enum fngDefectReported {
               value 4;
               description
               "A defect is present, and some defect has been
                reported.";


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            }
            enum fngDefectClearing {
               value 5;
               description
               "No defect is present, but the dot1agCfmMepFngResetTime
                timer has not yet expired.";
            }
         }
         description
           "Indicates the diferent states of the MEP Fault Notification
            Generator State Machine.";
         reference
           "802.1ag clause 12.14.7.1.3:f and 20.35";
      }

      typedef Dot1agCfmRelayActionFieldValue {
         type enumeration {
            enum rlyHit  {
               value 1;
               description
               "The MP.s Mac address matches the LTM target MAC
                address.";
            }
            enum rlyFdb  {
               value 2;
               description
               "The egress port is determined by filter database.";
            }
            enum rlyMpdb {
               value 3;
               description
               "The egress port is determined by the MIP CCM database.";
            }
         }
         description
           "Possible values the Relay action field can take.";
         reference
           "802.1ag clauses 12.14.7.5.3:g, 20.36.2.5, 21.9.5, and
            Table 21-27";
      }

      typedef Dot1agCfmIngressActionFieldValue {
         type enumeration {
            enum ingNoTlv   {
               value 0;
               description
               "Ingress no TLV.";


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            }
            enum ingOk      {
               value 1;
               description
               "The target data frame would be passed through the
                bridge.";
            }
            enum ingDown    {
               value 2;
               description
               "The bridge port.s MAC_operational parameter is false.";
            }
            enum ingBlocked {
               value 3;
               description
               "The target data from will not be forwarded due to the
                port is blocked.";
            }
            enum ingVid     {
               value 4;
               description
               "The port is not in the LTM.s VID member set, and the
                target data frame would be filtered at the ingress.";
            }
         }
         description
           "Possible values returned in the ingress action field.";
         reference
           "802.1ag clauses 12.14.7.5.3:g, 20.36.2.6, 21.9.8.1, and
            Table 21-30";
      }

      typedef Dot1agCfmEgressActionFieldValue {
         type enumeration {
            enum egrNoTlv   {
               value 0;
               description
               "Egress no TLV.";
            }
            enum egrOK      {
               value 1;
               description
               "The targeted data frame is forwarded.";
            }
            enum egrDown    {
               value 2;
               description


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               "The egress port.s MAC_Operational parameter is false.";
            }
            enum egrBlocked {
               value 3;
               description
               "The data frame is not passed through the egress port
                due to the port is blocked.";
            }
            enum egrVid     {
               value 4;
               description
               "The port is not in the LTM.s VID member set, and the
                target data frame would be filtered at the ingress.";
            }
         }
         description
           "Possible values returned in the egress action field";
         reference
           "802.1ag clauses 12.14.7.5.3:o, 20.36.2.10, 21.9.9.1, and
            Table 21-32";
      }

      typedef Dot1agCfmRemoteMepState {
         type enumeration {
            enum rMepIdle   {
               value 1;
               description
               "Momentary state during reset.";
            }
            enum rMepStart  {
               value 2;
               description
               "The timer has not expired since the state machine
                was reset, and no valid CCM has yet been received.";
            }
            enum rMepFailed {
               value 3;
               description
               "The timer has expired, both since the state machine
                was reset, and since a valid CCM was received.";
            }
            enum rMepOk     {
               value 4;
               description
               "The timer has not expired since a valid CCM was
                received.";
            }


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         }
         description
           "Operational state of the remote MEP state machine.  This
            state machine monitors the reception of valid CCMs from a
            remote MEP with a specific MEPID.  It uses a timer that
            expires in 3.5 times the length of time indicated by the
            dot1agCfmMaNetCcmInterval object.";
         reference
           "802.1ag clauses 12.14.7.6.3:b, 20.22";
      }

      typedef Dot1afCfmIndexIntegerNextFree {
         type uint32 {
            range "0..4294967295";
         }
         description
           "An integer which may be used as a new Index in a table.

            The special value of 0 indicates that no more new entries
            can be created in the relevant table.

            When a MIB is used for configuration, an object with this
            SYNTAX always contains a legal value (if non-zero) for an
            index that is not currently used in the relevant table. The
            Command Generator (Network Management Application) reads
            this variable and uses the (non-zero) value read when
            creating a new row with an SNMP SET.  When the SET is
            performed, the Command Responder (agent) must determine
            whether the value is indeed still unused; Two Network
            Management Applications may attempt to create a row
           (configuration entry) simultaneously and use the same value.
            If it is currently unused, the SET succeeds and the Command
            Responder (agent) changes the value of this object,
            according to an implementation-specific algorithm.
            If the value is in use, however, the SET fails.
            The Network Management Application must then re-read this
            variable to obtain a new usable value.

            An OBJECT-TYPE definition using this SYNTAX MUST specify the
            relevant table for which the object is providing this
            functionality.";
      }

      typedef Dot1agCfmMepDefects {
         type bits {
            bit bDefRDICCM    {
               position 0;


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               description
               "A remote MEP is reported the RDI bit in its last CCM.";
            }
            bit bDefMACstatus {
               position 1;
               description
               "Either some remote MEP is reporting its Interface
                Status TLV as not isUp, or all remote MEPs are
                reporting a Port Status TLV that contains some value
                other than psUp.";
            }
            bit bDefRemoteCCM {
               position 2;
               description
               "The MEP is not receiving valid CCMs from at least
                one of the remote MEPs.";
            }
            bit bDefErrorCCM  {
               position 3;
               description
               "The MEP has received at least one invalid CCM whose
                CCM Interval has not yet timed out.";
           }
            bit bDefXconCCM   {
               position 4;
               description
               "The MEP has received at least one CCM from either
                another MAID or a lower MD Level whose CCM Interval
                has not yet timed out.";
            }
         }
         description
           "A MEP can detect and report a number of defects, and
            multiple defects can be present at the same time.";
         reference
           "802.1ag clauses 12.14.7.1.3:o, 12.14.7.1.3:p, 12.14.7.1.3:q,
            12.14.7.1.3:r, and 12.14.7.1.3:s.";
      }

      typedef Dot1agCfmConfigErrors {
         type bits {
            bit cfmLeak          {
               position 0;
               description
               "MA x is associated with a specific VID list, one or
                more of the VIDs in MA x can pass through the Bridge
                Port, no Down MEP is configured on any Bridge Port


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                for MA x, and some other MA y, at a higher MD Level
                than MA x, and associated  with at least one of the
                VID(s) also in MA x, does have a MEP configured on
                the Bridge Port."; }
            bit conflictingVids  {
               position 1;
               description
               "MA x is associated with a specific VID list, an Up MEP
                is configured on MA x on the Bridge Port, and some
                other MA y, associated with at least one of the VID(s)
                also in MA x,also has an Up MEP configured on some
                Bridge Port."; }
            bit excessiveLevels  {
               position 2;
               description
               "The number of different MD Levels at which MIPs are to
                be created on this port exceeds the Bridge's
                capabilities (see subclause 22.3)."; }
            bit overlappedLevels {
               position 3;
               description
               "A MEP is created for one VID at one MD Level, but a MEP
                is configured on another VID at that MD Level or
                higher, exceeding the Bridge's capabilities."; }
         }
         description
           "While making the MIP creation evaluation described in
            802.1ag clause 22.2.3, the management entity can encounter
            errors in the configuration.";

         reference
           "802.1ag clause 12.14.4.1.3:b and clauses 22.2.3
            and 22.2.4";
      }

      typedef Dot1agCfmPbbComponentIdentifier {
         type uint32 {
            range "1..4294967295";
         }
         description
           "A Provider Backbone Bridge (PBB) can comprise a number of
            components, each of which can be managed in a manner
            essentially equivalent to an 802.1Q bridge.  In order to
            access these components easily, an index is used in a
            number of tables.  If any two tables are indexed by
            Dot1agCfmPbbComponentIdentifier, then entries in those
            tables indexed by the same value of


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            Dot1agCfmPbbComponentIdentifier correspond to the same
            component.";
         reference
           "802.1ag clause 17.5";
      }

      container dot1agCfmStack {
       config false;
       description
         "It enables the network administrator to discover the
          information about the Maintenance Points configured
          on a port.";

         list dot1agCfmStackEntry {
            key "dot1agCfmStackifIndex dot1agCfmStackVlanIdOrNone
                 dot1agCfmStackMdLevel dot1agCfmStackDirection";
            description
              "The Stack table entry";

            leaf dot1agCfmStackifIndex {
               type cfm:if-index;
               config false;
               description
                 "This object represents the  Bridge Port or aggregated
                  port on which MEPs or MHFs might be configured.

                  Upon a restart of the system, the system SHALL, if
                  necessary, change the value of this variable, and
                  rearrange the dot1agCfmStackTable, so that it indexes
                  the entry in the interface table with the same value
                  of ifAlias that it indexed before the system restart.
                  If no such entry exists, then the system SHALL delete
                  all entries in the dot1agCfmStackTable with the
                  interface index.";
               reference
                 "802.1ag clause 12.14.2.1.2:a";
            }

            leaf dot1agCfmStackVlanIdOrNone {
               type cfm:VlanIdOrNone;
               config false;
               description
                 "VLAN ID to which the MP is attached, or 0, if none.";
               reference
                 "802.1ag clauses 12.14.2.1.2:d, 22.1.7";
            }



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            leaf dot1agCfmStackMdLevel {
               type cfm:Dot1agCfmMDLevel;
               config false;
               description
                 "MD Level of the Maintenance Point.";
               reference
                 "802.1ag clause 12.14.2.1.2:b";
            }

            leaf dot1agCfmStackDirection {
               type cfm:Dot1agCfmMpDirection;
               config false;
               description
                 "Direction in which the MP faces on the Bridge Port";
               reference
                 "802.1ag clause 12.14.2.1.2:c";
            }

            leaf dot1agCfmStackMdIndex {
               type uint32;
               config false;
               description
                 "The index of the Maintenance Domain in the
                  dot1agCfmMdTable to which the MP is associated,
                  or 0, if none.";
               reference
                 "802.1ag clause 12.14.2.1.3:b";
            }

            leaf dot1agCfmStackMaIndex {
               type uint32;
               config false;
               description
                 "The index of the MA in the dot1agCfmMaNetTable and
                  dot1agCfmMaCompTable to which the MP is associated,
                  or 0, if none.";
               reference
                 "802.1ag clause 12.14.2.1.3:c";
            }

            leaf dot1agCfmStackMepId {
               type cfm:Dot1agCfmMepIdOrZero;
               config false;
               description
                 "If an MEP is configured, the MEPID, else 0";
               reference
                 "802.1ag clause 12.14.2.1.3:d";


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            }

            leaf dot1agCfmStackMacAddress {
               type yang:mac-address;
               config false;
               description
                 "MAC address of the MP.";
               reference
                 "802.1ag clause 12.14.2.1.3:e";
            }
         }
      }

      container dot1agCfmDefaultMd {
       description
         "Interface configuration parameters.";

         leaf dot1agCfmDefaultMdDefLevel {
            type cfm:Dot1agCfmMDLevel;
            description
              "A value indicating the MD Level at which MHFs are to be
               created, and Sender ID TLV transmission by those MHFs is
               to be controlled, for each dot1agCfmDefaultMdEntry whose
               dot1agCfmDefaultMdLevel object contains the value -1.

               After this initialization, this object needs to be
               persistent upon reboot or restart of a device.";
            reference
              "802.1ag clause 12.14.3.1.3:c, 12.14.3.2.2:b";
         }

         leaf dot1agCfmDefaultMdDefMhfCreation {
            type cfm:Dot1agCfmMhfCreation;
            description
              "A value indicating if the Management entity can create
               MHFs (MIP Half Function) for the VID, for each
               dot1agCfmDefaultMdEntry whose
               dot1agCfmDefaultMdMhfCreation
               object contains the value defMHFdefer.  Since, in this
               variable, there is no encompassing Maintenance Domain,
               the value defMHFdefer is not allowed.

               After this initialization, this object needs to be
               persistent upon reboot or restart of a device.";
            reference
              "802.1ag clause 12.14.3.1.3:d";
         }


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         leaf dot1agCfmDefaultMdDefIdPermission {
            type cfm:Dot1agCfmIdPermission;
            description
              "Enumerated value indicating what, if anything, is to be
               included in the Sender ID TLV (21.5.3) transmitted by
               MHFs created by the Default Maintenance Domain, for each
               dot1agCfmDefaultMdEntry whose
               dot1agCfmDefaultMdIdPermission object contains the value
               sendIdDefer.  Since, in this variable, there is no
               encompassing Maintenance Domain, the value sendIdDefer
               is not allowed.

               After this initialization, this object needs to be
               persistent upon reboot or restart of a device.";
            reference
              "802.1ag clause 12.14.3.1.3:e";
         }

         list dot1agCfmDefaultMdEntry {

            key "dot1agCfmDefaultMdComponentId
                 dot1agCfmDefaultMdPrimaryVid";
            description
              "The Default MD Level table entry.";


            leaf dot1agCfmDefaultMdComponentId {
               type cfm:Dot1agCfmPbbComponentIdentifier;
               description
                 "The bridge component within the system to which
                  the information in this dot1agCfmDefaultMdEntry
                  applies.  If the system is not a Bridge, or if only
                  one component is present in the Bridge, then this
                  variable (index) must be equal to 1.";
               reference
                 "802.1ag clause 17.5";
            }

            leaf dot1agCfmDefaultMdPrimaryVid {
               type cfm:VlanId;
               description
                 "The Primary VID of the VLAN to which this entry's
                  objects apply.";
            }

            leaf dot1agCfmDefaultMdStatus {


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               type boolean;
               config false;
               description
                 "State of this Default MD Level table entry.  True if
                  there is no entry in the Maintenance Association
                  table defining an MA for the same VLAN ID and MD
                  Level as this table's entry, and on which MA an Up
                  MEP is defined, else false.";
               reference
                 "802.1ag clause 12.14.3.1.3:b";
            }

            leaf dot1agCfmDefaultMdLevel {
               type cfm:Dot1agCfmMDLevelOrNone;
               description
                 "A value indicating the MD Level at which MHFs are to
                  be created, and Sender ID TLV transmission by those
                  MHFs is to be controlled, for the VLAN to which this
                  entry's objects apply.  If this object has the value
                  -1, the MD Level for MHF creation for this VLAN is
                  controlled by dot1agCfmDefaultMdDefLevel.";
               reference
                 "802.1ag clause 12.14.3.1.3:c, 12.14.3.2.2:b";
            }

            leaf dot1agCfmDefaultMdMhfCreation {
               type cfm:Dot1agCfmMhfCreation;
               description
                 "A value indicating if the Management entity can
                  create MHFs (MIP Half Function) for this VID at
                  this MD Level.  If this object has the value
                  defMHFdefer, MHF creation for this VLAN
                  is controlled by dot1agCfmDefaultMdDefMhfCreation.

                  The value of this variable is meaningless if the
                  values of dot1agCfmDefaultMdStatus is false.";
               reference
                 "802.1ag clause 12.14.3.1.3:d";
            }

            leaf dot1agCfmDefaultMdIdPermission {
               type cfm:Dot1agCfmIdPermission;
               description
                 "Enumerated value indicating what, if anything, is to
                  be included in the Sender ID TLV (21.5.3)
                  transmitted by MHFs created by the Default
                  Maintenance Domain. If this object has the value


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                  sendIdDefer, Sender ID TLV transmission for this VLAN
                  is controlled by
                  dot1agCfmDefaultMdDefIdPermission.

                  The value of this variable is meaningless if the
                  values of dot1agCfmDefaultMdStatus is false.";
               reference
                 "802.1ag clause 12.14.3.1.3:e";
            }
         }
      }

      container dot1agCfmVlan {
       description
         "It contains the association between VID and VLAN.";

         list dot1agCfmVlanEntry {

            key "dot1agCfmVlanComponentId dot1agCfmVlanVid";
            description
              "The VLAN table entry.";

            leaf dot1agCfmVlanComponentId {
               type cfm:Dot1agCfmPbbComponentIdentifier;
               description
                 "The bridge component within the system to which the
                  information in this dot1agCfmVlanEntry applies.
                  If the system is not a Bridge, or if only one
                  component is present in the Bridge, then
                  this variable (index) must be equal to 1.";
               reference
                 "802.1ag clause 17.5";
            }

            leaf dot1agCfmVlanVid {
               type cfm:VlanId;
               description
                 "This is a VLAN ID belonging to a VLAN that is
                  associated with more than one VLAN ID, and this
                  is not the Primary VID of the VLAN.";
            }

            leaf dot1agCfmVlanPrimaryVid {
               type cfm:VlanId;
               description
                 "This is the Primary VLAN ID of the VLAN with which
                  this entry's dot1agCfmVlanVid is associated.  This


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                  value must not equal the value of dot1agCfmVlanVid.";
            }

            leaf dot1agCfmVlanRowStatus {
               type cfm:RowStatus;
               description
                 "The status of the row.

                  The writable columns in a row can not be changed if
                  the row is active. All columns must have a valid
                  value before a row can be activated.";
            }
         }
      }

      container dot1agCfmConfigErrorList {
         config false;
         description
          "The CFM Configuration Error List provides a list of
           Interfaces and VIDs that are incorrectly configured.";

         list dot1agCfmConfigErrorListEntry {

            key "dot1agCfmConfigErrorListVid
                 dot1agCfmConfigErrorListIfIndex";
            description
              "The Config Error List Table  entry";

            leaf dot1agCfmConfigErrorListVid {
               type cfm:VlanId;
               description
                 "The VLAN ID of the VLAN with interfaces in error.";
               reference
                 "802.1ag Clause 12.14.4.1.2:a";
            }

            leaf dot1agCfmConfigErrorListIfIndex {
               type cfm:if-index;
               description
                 "This object is the IfIndex of the interface.

                  Upon a restart of the system, the system SHALL,
                  if necessary, change the value of this variable
                  so that it indexes the entry in the interface
                  table with the same value of ifAlias that it indexed
                  before the system restart.  If no such entry exists,
                  then the system SHALL delete any entries in


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                  dot1agCfmConfigErrorListTable indexed by that
                  InterfaceIndex value.";
               reference
                 "802.1ag clause 12.14.4.1.2:b";
            }

            leaf dot1agCfmConfigErrorListErrorType {
               type cfm:Dot1agCfmConfigErrors;
               description
                 "A vector of Boolean error conditions from 22.2.4,
                  any of which may be true:

                  0) CFMleak;
                  1) ConflictingVids;
                  2) ExcessiveLevels;
                  3) OverlappedLevels.";
               reference
                 "802.1ag clause 12.14.4.1.3:b";
            }
         }
      }

      container dot1agCfmMd {
         description
           "A Maintenance Domain is described in 802.1ag (3.21) as the
           network or the part of the network for which faults in
           connectivity are to be managed. The boundary of a Maintenance
           Domain is defined by a set of DSAPs, each of which can become
           a point of connectivity to a service instance.";

         leaf dot1agCfmMdTableNextIndex {
            type cfm:Dot1afCfmIndexIntegerNextFree;
            config false;
            description
              "This object contains an unused value for dot1agCfmMdIndex
               in the dot1agCfmMdTable, or a zero to indicate that
               none exist.";
         }

         list dot1agCfmMdEntry {

            key "dot1agCfmMdIndex";
            description
              "The Maintenance Domain table entry. This entry is
               not lost upon reboot. It is backed up by stable
               storage.";



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            leaf dot1agCfmMdIndex {
               type uint32 {
                  range "1..4294967295";
               }
               description
                 "The index to the Maintenance Domain table.

                  dot1agCfmMdTableNextIndex needs to be inspected to
                  find an available index for row-creation.

                  Referential integrity is required, i.e., the index
                  needs to be persistent upon a reboot or restart of
                  a device.  The index can never be reused for other
                  Maintenance Domain.  The index value should keep
                  increasing up to the time that they wrap around.
                  This is to facilitate access control based on OID.";
            }

            leaf dot1agCfmMdFormat {
               type cfm:Dot1agCfmMaintDomainNameType;
               description
                 "The type (and thereby format) of the Maintenance
                  Domain Name.";
               reference
                 "802.1ag clause 21.6.5.1";
            }

            leaf dot1agCfmMdName {
               type cfm:Dot1agCfmMaintDomainName;
               description
                 "The Maintenance Domain name. The type/format of
                  this object is determined by the value of the
                  dot1agCfmMdNameType object.

                  Each Maintenance Domain has unique name amongst
                  all those used or available to a service provider
                  or operator.  It facilitates easy identification
                  of administrative responsibility for each Maintenance
                  Domain.

                  Clause 3.23 defines a Maintenance Domain name as the
                  identifier, unique over the domain for which CFM is to
                  protect against accidental concatenation of Service
                  Instances, of a particular Maintenance Domain.";
               reference
                 "802.1ag clauses 3.23, 12.14.5, and 21.6.5.3";


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            }

            leaf dot1agCfmMdMdLevel {
               type cfm:Dot1agCfmMDLevel;
               description
                 "The Maintenance Domain Level.";
               reference
                 "802.1ag clause 12.14.5.1.3:b";
            }

            leaf dot1agCfmMdMhfCreation {
               type cfm:Dot1agCfmMhfCreation;
               description
                 "Enumerated value indicating whether the management
                  entity can create MHFs (MIP Half Function) for
                  this Maintenance Domain. Since, in this variable,
                  there is no encompassing Maintenance Domain,
                  the value defMHFdefer is not allowed.";
               reference
                 "802.1ag clause 12.14.5.1.3:c";
            }

            leaf dot1agCfmMdMhfIdPermission {
               type cfm:Dot1agCfmIdPermission;
               description
                 "Enumerated value indicating what, if anything, is to
                  be included in the Sender ID TLV (21.5.3) transmitted
                  by MPs configured in this Maintenance Domain.  Since,
                  in this variable, there is no encompassing Maintenance
                  Domain, the value sendIdDefer is not allowed.";
               reference
                 "802.1ag clause 12.14.5.1.3:d";
            }

            leaf dot1agCfmMdMaNextIndex {
               type cfm:Dot1afCfmIndexIntegerNextFree;
               config false;
               description
                 "Value to be used as the index of the MA table entries,
                  both the dot1agCfmMaNetTable and the
                  dot1agCfmMaCompTable, for this Maintenance Domain
                  when the management entity wants to create a new row
                  in those tables.";
            }

            leaf dot1agCfmMdRowStatus {
               type cfm:RowStatus;


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               description
                 "The status of the row.

                  The writable columns in a row can not be changed if
                  the row is active. All columns must have a valid
                  value before a row can be activated.";
            }
         }
      }

      container dot1agCfmMa {
         description
           "The Maintenance Association contains the VLAN ID that
            it wants to monitor.";

         list dot1agCfmMaNetEntry {

            key "dot1agCfmMdIndex dot1agCfmMaIndex";
            description
              "The MA table entry.";

            leaf dot1agCfmMdIndex {
               type leafref {
                  path "/cfm:dot1agCfmMd/cfm:dot1agCfmMdEntry/cfm"
                  +":dot1agCfmMdIndex";
               }
               description
                 "Automagically generated leafref leaf.";
            }

            leaf dot1agCfmMaIndex {
               type uint32 {
                  range "1..4294967295";
               }
               description
                 "Index of the MA table dot1agCfmMdMaNextIndex needs to
                  be inspected to find an available index for
                  row-creation.";
            }

            leaf dot1agCfmMaNetFormat {
               type cfm:Dot1agCfmMaintAssocNameType;
               description
                 "The type (and thereby format) of the Maintenance
                  Association Name.";
               reference
                 "802.1ag clauses 21.6.5.4";


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            }

            leaf dot1agCfmMaNetName {
               type cfm:Dot1agCfmMaintAssocName;
               description
                 "The Short Maintenance Association name. The
                  type/format of this object is determined by the
                  value of the dot1agCfmMaNetNameType object.
                  This name must be unique within a maintenance
                  domain.";
               reference
                 "802.1ag clauses 21.6.5.6, and Table 21-20";
            }

            leaf dot1agCfmMaNetCcmInterval {
               type cfm:Dot1agCfmCcmInterval;
               description
                 "Interval between CCM transmissions to be used by
                  all MEPs in the MA.";
               reference
                 "802.1ag clause 12.14.6.1.3:e";
            }

            leaf dot1agCfmMaNetRowStatus {
               type cfm:RowStatus;
               description
                 "The status of the row.

                  The writable columns in a row can not be changed
                  if the row is active. All columns must have a valid
                  value before a row can be activated.";
            }
         }

         list dot1agCfmMaCompEntry {

            key "dot1agCfmMaComponentId dot1agCfmMdIndex
                 dot1agCfmMaIndex";
            description
              "The MA table entry.";

            leaf dot1agCfmMdIndex {
               type leafref {
                  path "/cfm:dot1agCfmMd/cfm:dot1agCfmMdEntry/cfm"
                  +":dot1agCfmMdIndex";
               }
               description


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                 "Automagically generated leafref leaf.";
            }
            leaf dot1agCfmMaIndex {
               type leafref {
                  path "/cfm:dot1agCfmMa/cfm:dot1agCfmMaNetEntry/cfm"
                  +":dot1agCfmMaIndex";
               }
               description
                 "Automagically generated leafref leaf.";
            }

            leaf dot1agCfmMaComponentId {
               type cfm:Dot1agCfmPbbComponentIdentifier;
               description
                 "The bridge component within the system to which
                  the information in this dot1agCfmMaCompEntry applies.
                  If the system is not a Bridge, or if only one
                  component is present in the Bridge, then this
                  variable (index) must be equal to 1.";
               reference
                 "802.1ag clause 17.5";
            }

            leaf dot1agCfmMaCompPrimaryVlanId {
               type cfm:VlanIdOrNone;
               description
                 "The Primary VLAN ID with which the Maintenance
                  Association is associated, or 0 if the MA is not
                  attached to any VID.  If the MA is associated with
                  more than one VID, the dot1agCfmVlanTable lists
                  them.";
               reference
                 "802.1ag clause 12.14.6.1.3:b";
            }

            leaf dot1agCfmMaCompMhfCreation {
               type cfm:Dot1agCfmMhfCreation;
               description
                 "Indicates if the Management entity can create MHFs
                 (MIP Half Function) for this MA.";
               reference
                 "802.1ag clause 12.14.6.1.3:c";
            }

            leaf dot1agCfmMaCompIdPermission {
               type cfm:Dot1agCfmIdPermission;
               description


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                 "Enumerated value indicating what, if anything, is
                  to be included in the Sender ID TLV (21.5.3)
                  transmitted by MPs configured in this MA.";
               reference
                 "802.1ag clause 12.14.6.1.3:d";
            }

            leaf dot1agCfmMaCompNumberOfVids {
               type uint32;
               config false;
               description
                 "The number of VIDs associated with the MA.";
               reference
                 "802.1ag clause 12.14.6.1.3:b";
            }

            leaf dot1agCfmMaCompRowStatus {
               type cfm:RowStatus;
               description
                 "The status of the row.

                  The writable columns in a row can not be changed if
                  the row is active. All columns must have a valid
                  value before a row can be activated.";
            }
         }


         list dot1agCfmMaMepListEntry {

            key "dot1agCfmMdIndex dot1agCfmMaIndex
                 dot1agCfmMaMepListIdentifier";
            description
              "The known MEPS table entry.";

            leaf dot1agCfmMdIndex {
               type leafref {
                  path "/cfm:dot1agCfmMd/cfm:dot1agCfmMdEntry/cfm"
                  +":dot1agCfmMdIndex";
               }
               description
                 "Automagically generated leafref leaf.";
            }
            leaf dot1agCfmMaIndex {
               type leafref {
                  path "/cfm:dot1agCfmMa/cfm:dot1agCfmMaNetEntry/cfm"
                  +":dot1agCfmMaIndex";


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               }
               description
                 "Automagically generated leafref leaf.";
            }

            leaf dot1agCfmMaMepListIdentifier {
               type cfm:Dot1agCfmMepId;
               description
                 "MEPID";
               reference
                 "802.1ag clause 12.14.6.1.3:g";
            }

            leaf dot1agCfmMaMepListRowStatus {
               type cfm:RowStatus;
               description
                 "The status of the row. Read SNMPv2-TC (RFC1903)
                  for an explanation of the possible values this
                  object can take.";
            }
         }
      }

      container dot1agCfmMep {
         description
           "The MEP container contains the configuration for a
            Maintenance point, for example, the direction, ID,
            VLAN ID and so on.";

         list dot1agCfmMepEntry {

            key "dot1agCfmMdIndex dot1agCfmMaIndex
                 dot1agCfmMepIdentifier";
            description
              "The MEP table entry";

            leaf dot1agCfmMdIndex {
               type leafref {
                  path "/cfm:dot1agCfmMd/cfm:dot1agCfmMdEntry/cfm"
                  +":dot1agCfmMdIndex";
               }
               description
                 "Automagically generated leafref leaf.";
            }
            leaf dot1agCfmMaIndex {
               type leafref {
                  path "/cfm:dot1agCfmMa/cfm:dot1agCfmMaNetEntry/cfm"


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                  +":dot1agCfmMaIndex";
               }
               description
                 "Automagically generated leafref leaf.";
            }

            leaf dot1agCfmMepIdentifier {
               type cfm:Dot1agCfmMepId;
               description
                 "Integer that is unique among all the MEPs in the
                  same MA. Other definition is: a small integer,
                  unique over a given Maintenance Association,
                  identifying a specific Maintenance association
                  End Point (3.18).

                  MEP Identifier is also known as the MEPID.";
               reference
                 "802.1ag clauses 3.18, 19.2 and 12.14.7";
            }

            leaf dot1agCfmMepIfIndex {
               type cfm:if-index-or-zero;
               description
                 "This object is the interface index of the interface
                  either a bridge port, or an aggregated IEEE 802.1
                  link within a bridge port, to which the MEP is
                  attached.

                  Upon a restart of the system, the system SHALL, if
                  necessary, change the value of this variable so that
                  it indexes the entry in the interface table with the
                  same value of ifAlias that it indexed before the
                  system restart.  If no such entry exists, then the
                  system SHALL set this variable to 0.";
               reference
                 "802.1ag clause 12.14.7.1.3:b";
            }

            leaf dot1agCfmMepDirection {
               type cfm:Dot1agCfmMpDirection;
               description
                 "The direction in which the MEP faces on the Bridge
                  port.";
               reference
                 "802.1ag clauses 12.14.7.1.3:c and 19.2";
            }



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            leaf dot1agCfmMepPrimaryVid {
               type uint32 {
                  range "0..16777215";
               }
               description
                 "An integer indicating the Primary VID of the MEP,
                  always one of the VIDs assigned to the MEP's MA.
                  The value 0 indicates that either the Primary VID
                  is that of the MEP's MA, or that the MEP's MA is
                  associated with no VID.";
               reference
                 "802.1ag clauses 12.14.7.1.3:d";
            }

            leaf dot1agCfmMepActive {
               type boolean;
               description
                 "Administrative state of the MEP

                  A Boolean indicating the administrative state of
                  the MEP.

                  True indicates that the MEP is to function normally,
                  and false that it is to cease functioning.";
               reference
                 "802.1ag clauses 12.14.7.1.3:e and 20.9.1";
            }

            leaf dot1agCfmMepFngState {
               type cfm:Dot1agCfmFngState;
               config false;
               description
                 "Current state of the MEP Fault Notification Generator
                  State Machine.";
               reference
                 "802.1ag clauses 12.14.7.1.3:f and 20.35";
            }

            leaf dot1agCfmMepCciEnabled {
               type boolean;
               description
                 "If set to true, the MEP will generate CCM messages.";
               reference
                 "802.1ag clauses 12.14.7.1.3:g and 20.10.1";
            }

            leaf dot1agCfmMepCcmLtmPriority {


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               type uint32 {
                  range "0..7";
               }
               description
                 "The priority value for CCMs and LTMs transmitted by
                  the MEP. Default Value is the highest priority value
                  allowed to pass through the bridge port for any of
                  this MEPs VIDs. The management entity can obtain the
                  default value for this variable from the priority
                  regeneration table by extracting the highest priority
                  value in this table on this MEPs bridge port.
                  (1 is lowest, then 2, then 0, then 3-7).";
               reference
                 "802.1ag clause 12.14.7.1.3:h";
            }

            leaf dot1agCfmMepMacAddress {
               type yang:mac-address;
               config false;
               description
                 "MAC address of the MEP.";
               reference
                 "802.1ag clause 12.14.7.1.3:i and 19.4";
            }

            leaf dot1agCfmMepLowPrDef {
               type cfm:Dot1agCfmLowestAlarmPri;
               description
                 "An integer value specifying the lowest priority
                  defect that is allowed to generate fault alarm.";
               reference
                 "802.1ag clause 12.14.7.1.3:k and 20.9.5 and Table
                  20-1";
            }

            leaf dot1agCfmMepFngAlarmTime {
               type cfm:TimeInterval {
                  range "250..1000";
               }
               description
                 "The time that defects must be present before a Fault
                  Alarm is issued (fngAlarmTime. 20.33.3)
                 (default 2.5s).";
               reference
                 "802.1ag clauses 12.14.7.1.3:l and 20.33.3";
            }



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            leaf dot1agCfmMepFngResetTime {
               type cfm:TimeInterval {
                  range "250..1000";
               }
               description
                 "The time that defects must be absent before resetting
                  a Fault Alarm (fngResetTime, 20.33.4) (default 10s).";
               reference
                 "802.1ag clauses 12.14.7.1.3:m and 20.33.4";
            }

            leaf dot1agCfmMepHighestPrDefect {
               type cfm:Dot1agCfmHighestDefectPri;
               config false;
               description
                 "The highest priority defect that has been present
                  since the MEPs Fault Notification Generator State
                  Machine was last in the FNG_RESET state.";
               reference
                 "802.1ag clause 12.14.7.1.3:n  20.33.9 and Table 21-1";
            }

            leaf dot1agCfmMepDefects {
               type cfm:Dot1agCfmMepDefects;
               config false;
               description
                 "A vector of Boolean error conditions from Table 20-1,
                  any of which may be true:

                  DefRDICCM(0)
                  DefMACstatus(1)
                  DefRemoteCCM(2)
                  DefErrorCCM(3)
                  DefXconCCM(4)";
               reference
                 ".1ag clauses 12.14.7.1.3:o, 12.14.7.1.3:p,
                  12.14.7.1.3:q, 12.14.7.1.3:r, 12.14.7.1.3:s,
                  20.21.3, 20.23.3, 20.33.5, 20.33.6, 20.33.7.";
            }

            leaf dot1agCfmMepErrorCcmLastFailure {
               type binary {
                  length "1..1522";
               }
               config false;
               description
                 "The last-received CCM that triggered an DefErrorCCM


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                  fault.";
               reference
                 "802.1ag clauses 12.14.7.1.3:t and 20.21.2";
            }

            leaf dot1agCfmMepXconCcmLastFailure {
               type binary {
                  length "1..1522";
               }
               config false;
               description
                 "The last-received CCM that triggered a DefXconCCM
                  fault.";
               reference
                 "802.1ag clauses 12.14.7.1.3:u and 20.23.2";
            }

            leaf dot1agCfmMepCcmSequenceErrors {
               type yang:counter32;
               config false;
               description
                 "The total number of out-of-sequence CCMs received
                  from all remote MEPs.";
               reference
                 "802.1ag clauses 12.14.7.1.3:v and 20.16.12";
            }

            leaf dot1agCfmMepCciSentCcms {
               type yang:counter32;
               config false;
               description
                 "Total number of Continuity Check messages
                  transmitted.";
               reference
                 "802.1ag clauses 12.14.7.1.3:w and 20.10.2";
            }

            leaf dot1agCfmMepNextLbmTransId {
               type uint32;
               config false;
               description
                 "Next sequence number/transaction identifier to be
                  sent in a Loopback message. This sequence number can
                  be zero because it wraps around.";
               reference
                 "802.1ag clauses 12.14.7.1.3:x and 20.28.2";
            }


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            leaf dot1agCfmMepLbrIn {
               type yang:counter32;
               config false;
               description
                 "Total number of valid, in-order Loopback Replies
                  received.";
               reference
                 "802.1ag clause 12.14.7.1.3:y and 20.31.1";
            }

            leaf dot1agCfmMepLbrInOutOfOrder {
               type yang:counter32;
               config false;
               description
                 "The total number of valid, out-of-order Loopback
                  Replies received.";
               reference
                 "802.1ag clause 12.14.7.1.3:z and 20.31.1";
            }

            leaf dot1agCfmMepLbrBadMsdu {
               type yang:counter32;
               config false;
               description
                 "The total number of LBRs received whose
                  mac_service_data_unit did not match (except for
                  the OpCode) that of the corresponding LBM (20.2.3).";
               reference
                 "802.1ag clause 12.14.7.1.3:aa  20.2.3";
            }

            leaf dot1agCfmMepLtmNextSeqNumber {
               type uint32;
               config false;
               description
                 "Next transaction identifier/sequence number to be
                  sent in a Linktrace message. This sequence number
                  can be zero because it wraps around.";
               reference
                 "802.1ag clause 12.14.7.1.3:ab and 20.36.1";
            }

            leaf dot1agCfmMepUnexpLtrIn {
               type yang:counter32;
               config false;
               description


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                 "The total number of unexpected LTRs received.";
               reference
                 "802.1ag clause 12.14.7.1.3:ac  20.39.1";
            }

            leaf dot1agCfmMepLbrOut {
               type yang:counter32;
               config false;
               description
                 "Total number of Loopback Replies transmitted.";
               reference
                 "802.1ag clause 12.14.7.1.3:ad and 20.26.2";
            }

            leaf dot1agCfmMepTransmitLbmStatus {
               type boolean;
               description
                 "A Boolean flag set to true by the bridge port to
                  indicate that another LBM may be transmitted.";
            }

            leaf dot1agCfmMepTransmitLbmDestMacAddress {
               type yang:mac-address;
               description
                 "The Target MAC Address Field to be transmitted:
                  A unicast destination MAC address.
                  This address will be used if the value of the column
                  dot1agCfmMepTransmitLbmDestIsMepId is 'false'.";
               reference
                 "802.1ag clause 12.14.7.3.2:b";
            }

            leaf dot1agCfmMepTransmitLbmDestMepId {
               type cfm:Dot1agCfmMepIdOrZero;
               description
                 "The Maintenance association End Point Identifier of
                  another MEP in the same Maintenance Association to
                  which the LBM is to be sent.
                  This address will be used if the value of the column
                  dot1agCfmMepTransmitLbmDestIsMepId is 'true'.";
               reference
                 "802.1ag clause 12.14.7.3.2:b";
            }

            leaf dot1agCfmMepTransmitLbmDestIsMepId {
               type boolean;
               description


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                 "True indicates that MEPID of the target MEP is used
                  for Loopback transmission.
                  False indicates that unicast destination MAC address
                  of the target MEP is used for Loopback transmission.";
               reference
                 "802.1ag clause 12.14.7.3.2:b";
            }

            leaf dot1agCfmMepTransmitLbmMessages {
               type int32 {
                  range "1..1024";
               }
               description
                 "The number of Loopback messages to be transmitted.";
               reference
                 "802.1ag clause 12.14.7.3.2:c";
            }

            leaf dot1agCfmMepTransmitLbmDataTlv {
               type binary {
                  length "0..1500";
               }
               description
                 "An arbitrary amount of data to be included in the
                  Data TLV, if the Data TLV is selected to be sent.";
               reference
                 "802.1ag clause 12.14.7.3.2:d";
            }

            leaf dot1agCfmMepTransmitLbmVlanPriority {
               type int32 {
                  range "0..7";
               }
               description
                 "Priority. 3 bit value to be used in the VLAN tag,
                  if present in the transmitted frame.

                  The default value is CCM priority.";
               reference
                 "802.1ag clause 12.14.7.3.2:e";
            }

            leaf dot1agCfmMepTransmitLbmVlanDropEnable {
               type boolean;
               description
                 "Drop Enable bit value to be used in the VLAN tag,
                  if present in the transmitted frame.


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                  For more information about VLAN Drop Enable,
                  please check IEEE 802.1ad.";
               reference
                 "802.1ag clause 12.14.7.3.2:e";
            }

            leaf dot1agCfmMepTransmitLbmResultOK {
               type boolean;
               config false;
               description
                 "Indicates the result of the operation:

                  - true       The Loopback Message(s) will be
                               (or has been) sent.
                  - false      The Loopback Message(s) will not
                               be sent.";
               reference
                 "802.1ag clause 12.14.7.3.3:a";
            }

            leaf dot1agCfmMepTransmitLbmSeqNumber {
               type uint32;
               config false;
               description
                 "The Loopback Transaction Identifier
                  (dot1agCfmMepNextLbmTransId) of the first LBM (to be)
                   sent.
                   The value returned is undefined if
                   dot1agCfmMepTransmitLbmResultOK is false.";
               reference
                 "802.1ag clause 12.14.7.3.3:a";
            }

            leaf dot1agCfmMepTransmitLtmStatus {
               type boolean;
               config false;
               description
                 "A Boolean flag set to true by the bridge port to
                  indicate that another LTM may be transmitted.
                  Reset to false by the MEP Linktrace Initiator
                  State Machine.";
            }

            leaf dot1agCfmMepTransmitLtmFlags {
               type bits {
                  bit useFDBonly {


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                     position 0;
                     description
                        "It is used for indicating if only bridge.s
                         filter database is used for determining the
                         egress port.";
                  }
               }
               description
                 "The flags field for LTMs transmitted by the MEP.";
               reference
                 "802.1ag clause 12.14.7.4.2:b and 20.37.1";
            }

            leaf dot1agCfmMepTransmitLtmTargetMacAddress {
               type yang:mac-address;
               description
                 "The Target MAC Address Field to be transmitted:
                  A unicast destination MAC address.
                  This address will be used if the value of the column
                  dot1agCfmMepTransmitLtmTargetIsMepId is 'false'.";
               reference
                 "802.1ag clause 12.14.7.4.2:c";
            }

            leaf dot1agCfmMepTransmitLtmTargetMepId {
               type cfm:Dot1agCfmMepIdOrZero;
               description
                 "An indication of the Target MAC Address Field to be
                  transmitted:
                  The Maintenance association End Point Identifier of
                  another MEP in the same Maintenance Association
                  This address will be used if the value of the column
                  dot1agCfmMepTransmitLtmTargetIsMepId is 'true'.";
               reference
                 "802.1ag clause 12.14.7.4.2:c";
            }

            leaf dot1agCfmMepTransmitLtmTargetIsMepId {
               type boolean;
               description
                 "True indicates that MEPID of the target MEP is used
                  for Linktrace transmission.
                  False indicates that unicast destination MAC address
                  of the target MEP is used for Loopback transmission.";
               reference
                 "802.1ag clause 12.14.7.4.2:c";
            }


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            leaf dot1agCfmMepTransmitLtmTtl {
               type uint32 {
                  range "0..255";
               }
               description
                 "The LTM TTL field. Default value, if not specified,
                  is 64. The TTL field indicates the number of hops
                  remaining to the LTM.  Decremented by 1 by each
                  Linktrace Responder that handles the LTM.  The
                  value returned in the LTR is one less than that
                  received in the LTM.  If the LTM TTL is 0 or 1, the
                  LTM is not forwarded to the next hop, and if 0, no
                  LTR is generated.";
               reference
                 "802.1ag clause 12.14.7.4.2:d and 21.8.4";
            }

            leaf dot1agCfmMepTransmitLtmResult {
               type boolean;
               config false;
               description
                 "Indicates the result of the operation:

                  - true    The Linktrace Message will be (or has been)
                            sent.
                  - false   The Linktrace Message will not be sent";
               reference
                 "802.1ag clause 12.14.7.4.3:a";
            }

            leaf dot1agCfmMepTransmitLtmSeqNumber {
               type uint32;
               config false;
               description
                 "The LTM Transaction Identifier
                  (dot1agCfmMepLtmNextSeqNumber) of the LTM sent.
                  The value returned is undefined if
                  dot1agCfmMepTransmitLtmResult is false.";
               reference
                 "802.1ag clause 12.14.7.4.3:a";
            }

            leaf dot1agCfmMepTransmitLtmEgressIdentifier {
               type binary {
                  length "8";
               }


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               description
                 "Identifies the MEP Linktrace Initiator that is
                  originating, or the Linktrace Responder that is
                  forwarding, this LTM. The low-order six octets contain
                  a 48-bit IEEE MAC address unique to the system in
                  which the MEP Linktrace Initiator or Linktrace
                  Responder resides.  The high-order two octets contain
                  a value sufficient to uniquely identify the MEP
                  Linktrace Initiator or Linktrace Responder within
                  that system.

                  For most Bridges, the address of any MAC attached
                  to the Bridge will suffice for the low-order six
                  octets, and 0 for the high-order octets.  In some
                  situations, e.g., if multiple virtual Bridges
                  utilizing emulated LANs are implemented in a single
                  physical system, the high-order two octets can be used
                  to differentiate among the transmitting entities.

                  The value returned is undefined if
                  dot1agCfmMepTransmitLtmResult is false.";
               reference
                 "802.1ag clause 12.14.7.4.3:b and 21.8.8";
            }

            leaf dot1agCfmMepRowStatus {
               type cfm:RowStatus;
               description
                 "The status of the row.

                  The writable columns in a row can not be changed if
                  the row is active. All columns must have a valid
                  value before a row can be activated.";
            }
         }


         list dot1agCfmLtrEntry {

            key "dot1agCfmMdIndex dot1agCfmMaIndex
                 dot1agCfmMepIdentifier dot1agCfmLtrSeqNumber
                 dot1agCfmLtrReceiveOrder";
            description
              "The Linktrace Reply table entry.";

            leaf dot1agCfmMdIndex {
               type leafref {


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                  path "/cfm:dot1agCfmMd/cfm:dot1agCfmMdEntry/cfm"
                  +":dot1agCfmMdIndex";
               }
               description
                 "Automagically generated leafref leaf.";
            }
            leaf dot1agCfmMaIndex {
               type leafref {
                  path "/cfm:dot1agCfmMa/cfm:dot1agCfmMaNetEntry/cfm"
                  +":dot1agCfmMaIndex";
               }
               description
                 "Automagically generated leafref leaf.";
            }
            leaf dot1agCfmMepIdentifier {
               type leafref {
                  path "/cfm:dot1agCfmMep/cfm:dot1agCfmMepEntry/cfm"
                  +":dot1agCfmMepIdentifier";
               }
               description
                 "Automagically generated leafref leaf.";
            }

            leaf dot1agCfmLtrSeqNumber {
               type uint32 {
                  range "0..4294967295";
               }
               description
                 "Transaction identifier/Sequence number returned by
                  a previous transmit linktrace message command,
                  indicating which LTM's response is going to be
                  returned.";
               reference
                 "802.1ag clause 12.14.7.5.2:b";
            }

            leaf dot1agCfmLtrReceiveOrder {
               type uint32 {
                  range "1..4294967295";
               }
               description
                 "An index to distinguish among multiple LTRs with the
                  same LTR. Transaction Identifier field value.
                  dot1agCfmLtrReceiveOrder are assigned sequentially
                  from 1, in the order that the Linktrace Initiator
                  received the LTRs.";
               reference


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                 "802.1ag clause 12.14.7.5.2:c";
            }

            leaf dot1agCfmLtrTtl {
               type uint32 {
                  range "0..255";
               }
               config false;
               description
                 "TTL field value for a returned LTR.";
               reference
                 "802.1ag clause 12.14.7.5 and 20.36.2.2";
            }

            leaf dot1agCfmLtrForwarded {
               type boolean;
               config false;
               description
                 "Indicates if a LTM was forwarded by the responding
                  MP, as returned in the 'FwdYes' flag of the flags
                  field.";
               reference
                 "802.1ag clauses 12.14.7.5.3:c and 20.36.2.1";
            }

            leaf dot1agCfmLtrTerminalMep {
               type boolean;
               config false;
               description
                 "A boolean value stating whether the forwarded LTM
                  reached a MEP enclosing its MA, as returned in the
                  Terminal MEP flag of the Flags field.";
               reference
                 "802.1ag clauses 12.14.7.5.3:d and 20.36.2.1";
            }

            leaf dot1agCfmLtrLastEgressIdentifier {
               type binary {
                  length "8";
               }
               config false;
               description
                 "An octet field holding the Last Egress Identifier
                  returned in the LTR Egress Identifier TLV of the LTR.
                  The Last Egress Identifier identifies the MEP
                  Linktrace Initiator that originated, or the Linktrace
                  Responder that forwarded, the LTM to which this LTR


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                  is the response.  This is the same value as the
                  Egress Identifier TLV of that LTM.";
               reference
                 "802.1ag clauses 12.14.7.5.3:e and 20.36.2.3";
            }

            leaf dot1agCfmLtrNextEgressIdentifier {
               type binary {
                  length "8";
               }
               config false;
               description
                 "An octet field holding the Next Egress Identifier
                  returned in the LTR Egress Identifier TLV of the LTR.
                  The Next Egress Identifier Identifies the Linktrace
                  Responder that transmitted this LTR, and can forward
                  the LTM to the next hop.  This is the same value as
                  the Egress Identifier TLV of the forwarded LTM, if
                  any. If the FwdYes bit of the Flags field is false,
                  the contents of this field are undefined,
                  i.e., any value can be transmitted, and the field
                  is ignored by the receiver.";
               reference
                 "802.1ag clauses 12.14.7.5.3:f and 20.36.2.4";
            }

            leaf dot1agCfmLtrRelay {
               type cfm:Dot1agCfmRelayActionFieldValue;
               config false;
               description
                 "Value returned in the Relay Action field.";
               reference
                 "802.1ag clauses 12.14.7.5.3:g and 20.36.2.5";
            }

            leaf dot1agCfmLtrChassisIdSubtype {
               type cfm:LldpChassisIdSubtype;
               config false;
               description
                 "This object specifies the format of the Chassis ID
                  returned in the Sender ID TLV of the LTR, if any.
                  This value is  meaningless if the
                  dot1agCfmLtrChassisId has a length of 0.";
               reference
                 "802.1ag clauses 12.14.7.5.3:h and 21.5.3.2";
            }



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            leaf dot1agCfmLtrChassisId {
               type cfm:LldpChassisId;
               config false;
               description
                 "The Chassis ID returned in the Sender ID TLV of the
                  LTR, if any. The format of this object is determined
                  by the value of the dot1agCfmLtrChassisIdSubtype
                  object.";
               reference
                 "802.1ag clauses 12.14.7.5.3:i and 21.5.3.3";
            }

            leaf dot1agCfmLtrManAddressDomain {
               type cfm:TDomain;
               config false;
               description
                 "The TDomain that identifies the type and format of
                  the related dot1agCfmMepDbManAddress object, used to
                  access the SNMP agent of the system transmitting the
                  LTR.  Received in the LTR Sender ID TLV from that
                  system.

                  Typical values will be one of (not all inclusive)
                  list:


                     snmpUDPDomain          (from SNMPv2-TM, RFC3417)
                     snmpIeee802Domain      (from SNMP-IEEE802-TM-MIB,
                                             RFC4789)

                  The value 'zeroDotZero' (from RFC2578) indicates
                  'no management address was present in the LTR',
                   in which case the related object
                   dot1agCfmMepDbManAddress must have a zero-length
                   OCTET STRING as a value.";
               reference
                 "802.1ag clauses 12.14.7.5.3:j, 21.5.3.5, 21.9.6";
            }

            leaf dot1agCfmLtrManAddress {
               type cfm:TAddress;
               config false;
               description
                 "The TAddress that can be used to access the SNMP
                  agent of the system transmitting the CCM, received
                  in the CCM Sender ID TLV from that system.



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                  If the related object dot1agCfmLtrManAddressDomain
                  contains the value 'zeroDotZero', this object
                  dot1agCfmLtrManAddress must have a zero-length
                  OCTET STRING as a value.";
               reference
                 "802.1ag clauses 12.14.7.5.3:j, 21.5.3.7, 21.9.6";
            }

            leaf dot1agCfmLtrIngress {
               type cfm:Dot1agCfmIngressActionFieldValue;
               config false;
               description
                 "The value returned in the Ingress Action Field of
                  the LTM. The value ingNoTlv(0) indicates that no
                  Reply Ingress TLV was returned in the LTM.";
               reference
                 "802.1ag clauses 12.14.7.5.3:k and 20.36.2.6";
            }

            leaf dot1agCfmLtrIngressMac {
               type yang:mac-address;
               config false;
               description
                 "MAC address returned in the ingress MAC address field.
                  If the dot1agCfmLtrIngress object contains the value
                  ingNoTlv(0), then the contents of this object are
                  meaningless.";
               reference
                 "802.1ag clauses 12.14.7.5.3:l and 20.36.2.7";
            }

            leaf dot1agCfmLtrIngressPortIdSubtype {
               type cfm:LldpPortIdSubtype;
               config false;
               description
                 "Format of the Ingress Port ID.
                  If the dot1agCfmLtrIngress object contains the value
                  ingNoTlv(0), then the contents of this object are
                  meaningless.";
               reference
                 "802.1ag clauses 12.14.7.5.3:m and 20.36.2.8";
            }

            leaf dot1agCfmLtrIngressPortId {
               type cfm:LldpPortId;
               config false;
               description


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                 "Ingress Port ID. The format of this object is
                  determined by the value of the
                  dot1agCfmLtrIngressPortIdSubtype object. If the
                  dot1agCfmLtrIngress object contains the value
                  ingNoTlv(0), then the contents of this object
                  are meaningless.";
               reference
                 "802.1ag clauses 12.14.7.5.3:n and 20.36.2.9";
            }

            leaf dot1agCfmLtrEgress {
               type cfm:Dot1agCfmEgressActionFieldValue;
               config false;
               description
                 "The value returned in the Egress Action Field of the
                  LTM. The value egrNoTlv(0) indicates that no Reply
                  Egress TLV was returned in the LTM.";
               reference
                 "802.1ag clauses 12.14.7.5.3:o and 20.36.2.10";
            }

            leaf dot1agCfmLtrEgressMac {
               type yang:mac-address;
               config false;
               description
                 "MAC address returned in the egress MAC address field.
                  If the dot1agCfmLtrEgress object contains the value
                  egrNoTlv(0), then the contents of this object are
                   meaningless.";
               reference
                 "802.1ag clauses 12.14.7.5.3:p and 20.36.2.11";
            }

            leaf dot1agCfmLtrEgressPortIdSubtype {
               type cfm:LldpPortIdSubtype;
               config false;
               description
                 "Format of the egress Port ID.
                  If the dot1agCfmLtrEgress object contains the value
                  egrNoTlv(0), then the contents of this object are
                  meaningless.";
               reference
                 "802.1ag clauses 12.14.7.5.3:q and 20.36.2.12";
            }

            leaf dot1agCfmLtrEgressPortId {
               type cfm:LldpPortId;


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               config false;
               description
                 "Egress Port ID. The format of this object is
                  determined by the value of the
                  dot1agCfmLtrEgressPortIdSubtype object.If the
                  dot1agCfmLtrEgress object contains the value
                  egrNoTlv(0), then the contents of this object are
                  meaningless.";
               reference
                 "802.1ag clauses 12.14.7.5.3:r and 20.36.2.13";
            }

            leaf dot1agCfmLtrOrganizationSpecificTlv {
               type binary {
                  length "0 | 4..1500";
               }
               config false;
               description
                 "All Organization specific TLVs returned in the LTR, if
                  any.  Includes all octets including and following
                  the TLV Length field of each TLV, concatenated
                  together.";
               reference
                 "802.1ag clauses 12.14.7.5.3:s, 21.5.2";
            }
         }


         list dot1agCfmMepDbEntry {

            key "dot1agCfmMdIndex dot1agCfmMaIndex
                 dot1agCfmMepIdentifier
                 dot1agCfmMepDbRMepIdentifier";
            description
              "The MEP Database table entry.";

            leaf dot1agCfmMdIndex {
               type leafref {
                  path "/cfm:dot1agCfmMd/cfm:dot1agCfmMdEntry/cfm"
                  +":dot1agCfmMdIndex";
               }
               description
                 "Automagically generated leafref leaf.";
            }
            leaf dot1agCfmMaIndex {
               type leafref {
                  path "/cfm:dot1agCfmMa/cfm:dot1agCfmMaNetEntry/cfm"


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                  +":dot1agCfmMaIndex";
               }
               description
                 "Automagically generated leafref leaf.";
            }
            leaf dot1agCfmMepIdentifier {
               type leafref {
                  path "/cfm:dot1agCfmMep/cfm:dot1agCfmMepEntry/cfm"
                  +":dot1agCfmMepIdentifier";
               }
               description
                 "Automagically generated leafref leaf.";
            }

            leaf dot1agCfmMepDbRMepIdentifier {
               type cfm:Dot1agCfmMepId;
               description
                 "Maintenance association End Point Identifier of a
                  remote MEP whose information from the MEP Database
                  is to be returned.";
               reference
                 "802.1ag clause 12.14.7.6.2:b";
            }

            leaf dot1agCfmMepDbRMepState {
               type cfm:Dot1agCfmRemoteMepState;
               config false;
               description
                 "The operational state of the remote MEP IFF State
                  machines.";
               reference
                 "802.1ag clause 12.14.7.6.3:b and 20.22";
            }

            leaf dot1agCfmMepDbRMepFailedOkTime {
               type yang:timestamp;
               config false;
               description
                 "The time (SysUpTime) at which the IFF Remote MEP
                  state machine last entered either the RMEP_FAILED
                  or RMEP_OK state.";
               reference
                 "802.1ag clause 12.14.7.6.3:c";
            }

            leaf dot1agCfmMepDbMacAddress {
               type yang:mac-address;


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               config false;
               description
                 "The MAC address of the remote MEP.";
               reference
                 "802.1ag clause 12.14.7.6.3:d and 20.19.7";
            }

            leaf dot1agCfmMepDbRdi {
               type boolean;
               config false;
               description
                 "State of the RDI bit in the last received CCM
                  (true for RDI=1), or false if none has been
                  received.";
               reference
                 "802.1ag clauses 12.14.7.6.3:e and 20.19.2";
            }

            leaf dot1agCfmMepDbPortStatusTlv {
               type cfm:Dot1agCfmPortStatus;
               config false;
               description
                 "An enumerated value of the Port status TLV received
                  in the last CCM from the remote MEP or the default
                  value psNoPortStateTLV indicating either no CCM has
                  been received, or that nor port status TLV was
                  received in the last CCM.";
               reference
                 "802.1ag clause 12.14.7.6.3:f and 20.19.3";
            }

            leaf dot1agCfmMepDbInterfaceStatusTlv {
               type cfm:Dot1agCfmInterfaceStatus;
               config false;
               description
                 "An enumerated value of the Interface status TLV
                  received in the last CCM from the remote MEP or
                  the default value isNoInterfaceStatus TLV indicating
                  either no CCM has been received, or that no interface
                  status TLV was received in the last CCM.";
               reference
                 "802.1ag clause 12.14.7.6.3:g and 20.19.4";
            }

            leaf dot1agCfmMepDbChassisIdSubtype {
               type cfm:LldpChassisIdSubtype;
               config false;


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               description
                 "This object specifies the format of the Chassis ID
                  received in the last CCM.";
               reference
                 "802.1ag clauses 12.14.7.6.3:h and 21.5.3.2";
            }

            leaf dot1agCfmMepDbChassisId {
               type cfm:LldpChassisId;
               config false;
               description
                 "The Chassis ID. The format of this object is
                  determined by the  value of the
                  dot1agCfmLtrChassisIdSubtype object.";
               reference
                 "802.1ag clauses 12.14.7.6.3:h and 21.5.3.3";
            }

            leaf dot1agCfmMepDbManAddressDomain {
               type cfm:TDomain;
               config false;
               description
                 "The TDomain that identifies the type and format of
                  the related dot1agCfmMepDbManAddress object, used to
                  access the SNMP agent of the system transmitting the
                  CCM.  Received in the CCM Sender ID TLV from that
                  system.

                  Typical values will be one of (not all inclusive)
                  list:


                     snmpUDPDomain          (from SNMPv2-TM, RFC3417)
                     snmpIeee802Domain      (from SNMP-IEEE802-TM-MIB,
                                             RFC4789)

                  The value 'zeroDotZero' (from RFC2578) indicates
                  'no management address was present in the LTR',
                  in which case the related object
                  dot1agCfmMepDbManAddress must have a zero-length OCTET
                  STRING as a value.";
               reference
                 "802.1ag clauses 12.14.7.6.3:h, 21.5.3.5, 21.6.7";
            }

            leaf dot1agCfmMepDbManAddress {
               type cfm:TAddress;


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               config false;
               description
                 "The TAddress that can be used to access the SNMP
                  agent of the system transmitting the CCM, received
                  in the CCM Sender ID TLV from that system.

                  If the related object dot1agCfmMepDbManAddressDomaini
                  contains the value 'zeroDotZero', this object
                  dot1agCfmMepDbManAddress must have a zero-length
                  OCTET STRING as a value.";
               reference
                 "802.1ag clauses 12.14.7.6.3:h, 21.5.3.7, 21.6.7";
            }
         }
      }

      notification dot1agCfmFaultAlarm {
         description
           "A MEP has a persistent defect condition. A notification
            (fault alarm) is sent to the management entity with the OID
            of the MEP that has detected the fault.

            Whenever a MEP has a persistent defect,
            it may or may not generate a Fault Alarm to warn the system
            administrator of the problem, as controlled by the MEP
            Fault Notification Generator State Machine and associated
            Managed Objects. Only the highest-priority defect, as shown
            in Table 20-1, is reported in the Fault Alarm.

            If a defect with a higher priority is raised after a Fault
            Alarm has been issued, another Fault Alarm is issued.

            The management entity receiving the notification can
            identify the system from the network source address of the
            notification, and can identify the MEP reporting the defect
            by the indices in the OID of the dot1agCfmMepHighestPrDefect
            variable in the notification:

               dot1agCfmMdIndex - Also the index of the MEP's
                                  Maintenance Domain table entry
                                  (dot1agCfmMdTable).
               dot1agCfmMaIndex - Also an index (with the MD table
                                  index) of the MEP's Maintenance
                                  Association network table entry
                                  (dot1agCfmMaNetTable), and (with the
                                  MD table index and component ID) of
                                  the MEP's MA component table entry


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                                  (dot1agCfmMaCompTable).
               dot1agCfmMepIdentifier - MEP Identifier and final index
                                  into the MEP table
                                  (dot1agCfmMepTable).";
         reference
           "802.1ag clause 12.14.7.7";

         container dot1agCfmFaultAlarm-dot1agCfmMepHighestPrDefect {
           description
            "The highest priority defect that has been present since the
             MEPs Fault Notification Generator State Machine was last in
             the FNG_RESET state";

            leaf dot1agCfmMdIndex {
               type leafref {
                  path "/cfm:dot1agCfmMd/cfm:dot1agCfmMdEntry/cfm"
                  +":dot1agCfmMdIndex";
               }
               description
                 "Automagically generated leafref leaf.";
            }
            leaf dot1agCfmMaIndex {
               type leafref {
                  path "/cfm:dot1agCfmMa/cfm:dot1agCfmMaNetEntry/cfm"
                  +":dot1agCfmMaIndex";
               }
               description
                 "Automagically generated leafref leaf.";
            }
            leaf dot1agCfmMepIdentifier {
               type leafref {
                  path "/cfm:dot1agCfmMep/cfm:dot1agCfmMepEntry/cfm"
             +":dot1agCfmMepIdentifier";
               }
               description
                 "Automagically generated leafref leaf.";
            }
            leaf dot1agCfmMepHighestPrDefect {
               type cfm:Dot1agCfmHighestDefectPri;
               description
                 "The highest priority defect that has been present
                  since the MEPs Fault Notification Generator State
                  Machine was last in the FNG_RESET state.";
               reference
                 "802.1ag clause 12.14.7.1.3:n  20.33.9 and Table 21-1";
            }
         }


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      }
   } /* end of module ietf-cfm */
   <CODE ENDS>

4. Security Considerations

   The data model defined does not create any security implications.



5. IANA Considerations

   This draft does not request any IANA action.

6. Normative References

   [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
             Requirement Levels", BCP 14, RFC 2119, March 1997.

   [RFC6020] Bjorklund, M., Ed., "YANG - A Data Modeling Language for
             the Network Configuration Protocol (NETCONF)", RFC 6020,
             DOI 10.17487/RFC6020, October 2010, <http://www.rfc-
             editor.org/info/rfc6020>.

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

   [RFC2579] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J.,
             Rose, M. and S. Waldbusser, "Textual Conventions for
             SMIv2", STD 58, RFC 2579, April 1999. Done.

   [RFC4789] Schoenwaelder, J., Jeffree, T., "Simple Network Management
             Protocol (SNMP) over IEEE 802 Networks", RFC 4789, November
             2006.

   [RFC3417] Presuhn, R, Case, J., McCloghrie, K., Rose, M., S.
             Waldbusser, "Transport Mappings for he Simple Network
             Management Protocol (SNMP)", RFC 3417, December 2002.

   [RFC1903] Case, J., McCloghrie, K., Rose, M., S. Waldbusser, "Textual
             Conventions for Version 2 of the Simple Network Management
             Protocol (SNMPv2)", RFC 1903, January 1996.




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   [RFC2685] Fox, B., Bleeson, B. "Virtual Private Networks Identifier",
             RFC 2685, September 1999.





   [RFC1906] Case, J., McCloghrie, K., Rose, M., S. Waldbusser,
             "Transport Mappings for Version 2 of the Simple Network
             Management Protocol (SNMPv2)", RFC 1906, January 1996.

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

   [RFC2737] McCloghrie, K., Bierman, A., "The Interfaces Group MIB",
             RFC 2737, December 1999.

   [RFC3046] Patrick, M.," DHCP Relay Agent Information Option", RFC
             3046, January 2001.

   [IEEE802] "IEEE Standard for Local Area Networks: Overview and
             Architecture", IEEE Std. 802-2001.

   [IEEE802.1ag] "Virtual Bridged Local Area Networks - Amendment
             5:Connectivity Fault Management", IEEE Std. June, 2007.
























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   Authors' Addresses

   Kun Wang
   Ericsson
   Ericsson Tower 2, No.5 Lize East Street,
   Chaoyang District Beijing 100102, P.R. China

   Email kun.s.wang@ericsson.com

   Alex Wang
   Ericsson
   Ericsson Tower 2, No.5 Lize East Street,
   Chaoyang District Beijing 100102, P.R. China

   Email alex.g.wang@ericsson.com

   Chin Chen
   Ericsson
   Ericsson Tower 2, No.5 Lize East Street,
   Chaoyang District Beijing 100102, P.R. China

   Email chin.chen@ericsson.com

   Hua Lv
   Ericsson
   Ericsson Tower 2, No.5 Lize East Street,
   Chaoyang District Beijing 100102, P.R. China

   Email hua.lv@ericsson.com














Kun/Alex/Chin/Hua     Expires September 29, 2017              [Page 92]


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