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Versions: (draft-smiler-mpls-tp-linear-protection-mib) 00 01 02 03 04 05 06 07 08 09 10 11 12

MPLS Working Group                              Kingston Smiler Selvaraj
Internet-Draft                                                IpInfusion
Intended status: Standards Track                   Venkatesan Mahalingam
Expires: August 21, 2017                                       Dell Inc.
                                                             Daniel King
                                                      Old Dog Consulting
                                                              Sam Aldrin
                                                            Google, Inc.
                                                         Jeong-dong Ryoo
                                                                    ETRI
                                                       February 17, 2017


              MPLS Transport Profile Linear Protection MIB
              draft-ietf-mpls-tp-linear-protection-mib-12

Abstract

   This memo defines a portion of the Management Information Base (MIB)
   for use with network management protocols.  In particular it defines
   objects for managing Multiprotocol Label Switching-Transport Profile
   (MPLS-TP) Linear Protection.

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).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   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."

   This Internet-Draft will expire on August 21, 2017.

Copyright Notice

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

   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



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   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.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  The Internet-Standard Management Framework  . . . . . . . . .   3
   3.  Conventions . . . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . .   3
   5.  Structure of the MIB Module . . . . . . . . . . . . . . . . .   4
     5.1.  Textual Conventions . . . . . . . . . . . . . . . . . . .   4
     5.2.  The MPLS-TP Linear Protection Subtree . . . . . . . . . .   4
     5.3.  The Notifications Subtree . . . . . . . . . . . . . . . .   4
     5.4.  The Table Structures  . . . . . . . . . . . . . . . . . .   5
   6.  Relationship to Other MIB Modules . . . . . . . . . . . . . .   6
     6.1.  Relationship to the MPLS OAM Identifiers MIB Module . . .   6
   7.  Example of Protection Switching Configuration . . . . . . . .   6
   8.  Definitions . . . . . . . . . . . . . . . . . . . . . . . . .   8
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .  38
   10. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  40
   11. Contributing Authors  . . . . . . . . . . . . . . . . . . . .  40
   12. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  40
   13. References  . . . . . . . . . . . . . . . . . . . . . . . . .  40
     13.1.  Normative References . . . . . . . . . . . . . . . . . .  40
     13.2.  Informative References . . . . . . . . . . . . . . . . .  42
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  43

1.  Introduction

   This memo defines a portion of the Management Information Base (MIB)
   for use with network management protocols.  In particular it defines
   objects for managing Multiprotocol Label Switching-Transport Profile
   (MPLS-TP) Linear Protection.

   This MIB module should be used for configuring and managing the MPLS-
   TP linear protection for MPLS-TP Label Switched Paths (LSPs).

   At the time of writing, Simple Network Management Protocol (SNMP) SET
   is no longer recommended as a way to configure Multiprotocol Label
   Switching (MPLS) networks as was described in RFC 3812 [RFC3812].
   However, since the MIB module specified in this document is intended
   to work in parallel with the MIB module for MPLS specified in
   [RFC3812] and the MIB module for MPLS-TP Operations, Administration,
   and Maintenance (OAM) identifiers in RFC 7697 [RFC7697], certain



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   objects defined here are specified with MAX-ACCESS of read-write or
   read-create so that specifications of the base tables in [RFC3812]
   and [RFC7697] and the new MIB module in this document are consistent.

2.  The Internet-Standard Management Framework

   For a detailed overview of the documents that describe the current
   Internet-Standard Management Framework, please refer to section 7 of
   RFC 3410 [RFC3410].

   Managed objects are accessed via a virtual information store, termed
   the MIB.  MIB objects are generally accessed through the SNMP.
   Objects in the MIB are defined using the mechanisms defined in the
   Structure of Management Information (SMI).  This memo specifies a MIB
   module that is compliant to the SMIv2, which is described in STD 58,
   RFC 2578 [RFC2578], STD 58, RFC 2579 [RFC2579] and STD 58, RFC 2580
   [RFC2580].

3.  Conventions

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in BCP 14, RFC 2119
   [RFC2119].

4.  Overview

   RFC 6378 [RFC6378] defines the protocol to provide a linear
   protection switching mechanism for MPLS-TP for a point-to-point LSP
   within the protection domain bounded by the end points of the LSP.
   RFC 7271 [RFC7271] describes alternative mechanisms to perform some
   of the functions defined in [RFC6378], and also defines additional
   mechanisms, in order to provide operator control and experience that
   more closely models the behavior of linear protection seen in other
   transport networks.  Two modes are defined for MPLS-TP linear
   protection switching: Protection State Coordination (PSC) mode and
   Automatic Protection Switching (APS) mode as specified in [RFC6378]
   and [RFC7271], respectively.  The detailed protocol specification of
   MPLS transport profile linear protection is described in [RFC6378]
   and [RFC7271].

   This document specifies a MIB module for the Label Edge Router (LER)
   that supports MPLS-TP linear protection as described in [RFC6378] and
   [RFC7271].  Objects defined in the document are generally applied to
   both PSC and APS modes.  If an object is valid for a particular mode
   only, it is noted in the description for the object.





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5.  Structure of the MIB Module

5.1.  Textual Conventions

   The following new textual conventions are defined in this document:

   o  MplsLpsReq: This textual convention describes an object that
      stores the PSC Request field of the PSC control packet.

   o  MplsLpsFpathPath: This textual convention describes an object that
      stores the Fault Path (FPath) field and Data Path (Path) field of
      the PSC control packet.

   o  MplsLpsCommand: This textual convention describes an object that
      allows a user to perform any action over a protection domain.

   o  MplsLpsState: This textual convention describes an object that
      stores the current state of the PSC state machine.

5.2.  The MPLS-TP Linear Protection Subtree

   MPLS-LPS-MIB is the MIB module defined in this document, and it is
   put under mplsStdMIB [RFC3811].

5.3.  The Notifications Subtree

   Notifications are defined to inform the management station about
   switchover, provisioning mismatches, and protocol failures of the
   linear protection domain.  The following notifications are defined
   for this purpose:

   o  The notification, mplsLpsEventSwitchover is to inform the
      management station about the switchover of the active path.

   o  The notification, mplsLpsEventRevertiveMismatch is to inform the
      management station about the provisioning mismatch in the
      revertive mode across the end point of the protection domain.

   o  The notification, mplsLpsEventProtecTypeMismatch is to inform the
      management station about the provisioning mismatch in protection
      type, representing both bridge and switching types, across the end
      point of the protection domain.

   o  The notification, mplsLpsEventCapabilitiesMismatch is to inform
      the management station about the provisioning mismatch in
      Capabilities TLVs across the end point of the protection domain.





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   o  The notification, mplsLpsEventPathConfigMismatch is to inform the
      management station about the provisioning mismatch in the
      protection path configuration for PSC communication.

   o  The notification, mplsLpsEventFopNoResponse is to inform the
      management station about the failure of protocol due to a lack of
      response to a traffic switchover request in 50 ms.

   o  The notification, mplsLpsEventFopTimeout is to inform the
      management station about the failure of protocol due to no
      protocol message received during at least 3.5 times the long PSC
      message interval.

5.4.  The Table Structures

   The MPLS-TP linear protection MIB module has four tables.  The tables
   are as follows

   o  mplsLpsConfigTable

      This table is used to configure MPLS-TP linear protection domains.
      An MPLS-TP linear protection domain (or a protection domain) is
      identified by mplsLpsConfigDomainIndex.  A protection domain
      consists of two LERs and the working and protection paths that
      connect the two LERs.  The objects in this table are used to
      configure properties that are specific to the protection domain.
      Two Maintenance Entities (MEs) MUST be defined for each protection
      domain: one for the working path and the other for the protection
      path.  Therefore, two entries of the mplsLpsMeConfigTable, which
      is for configuring the MEs used in protection switching, are
      associated to one entry in this table.

   o  mplsLpsStatusTable

      This table provides the current status information of MPLS-TP
      linear protection domains that have been configured on the system.
      The entries of mplsLpsStatusTable have an AUGMENTS relationship
      with the entries of mplsLpsConfigTable.  When a protection domain
      is configured or deleted in the mplsLpsConfigTable, then the
      corresponding row of that session in the mplsLpsStatusTable is,
      respectively, automatically created or deleted.

   o  mplsLpsMeConfigTable

      This table is used to associate MEs to the protection domain.
      Each protection domain requires two MEs.  One entry in the
      mplsLpsConfigTable is associated with two entries in this table:
      one for the working path and the other for the protection path of



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      the protection domain.  The mplsLpsMeConfigPath object in this
      table indicates that the path is either working or protection.
      The ME is identified by mplsOamIdMegIndex, mplsOamIdMeIndex and
      mplsOamIdMeMpIndex, which are the same index values as the entry
      in the mplsOamIdMeTable defined in [RFC7697].  The relationship
      with the mplsOamIdMeTable is described in Section 6.1.

   o  mplsLpsMeStatusTable

      This table provides the current information about protection
      status of MEs that have been configured on the system.  When an ME
      configured or deleted in the mplsLpsMeConfigTable, then the
      corresponding row of that session in the mplsLpsMeStatusTable is,
      respectively, automatically created or deleted.

6.  Relationship to Other MIB Modules

6.1.  Relationship to the MPLS OAM Identifiers MIB Module

   Entries in the mplsOamIdMeTable [RFC7697] are extended by entries in
   the mplsLpsMeConfigTable.  Note that the nature of the 'extends'
   relationship is a sparse augmentation so that the entry in the
   mplsLpsMeConfigTable has the same index values as the entry in the
   mplsOamIdMeTable.  Each time that an entry is created in the
   mplsOamIdMeTable for which the LER supports MPLS-TP linear
   protection, a row is created automatically in the
   mplsLpsMeConfigTable.

   When a point-to-point transport path needs to be monitored, one ME is
   needed for the path and one entry in the mplsOamIdMeTable will be
   created.  But, the ME entry in the mplsOamIdMeTable may or may not
   participate in protection switching.  If an ME participates in
   protection switching, an entry in mplsLpsMeConfigTable MUST be
   created, and the objects in the entry indicates which protection
   domain this ME belongs to and whether this ME is for either working
   path or protection path.  If the ME does not participate in
   protection switching, an entry in mplsLpsMeConfigTable does not need
   to be created.

7.  Example of Protection Switching Configuration

   This example considers the protection domain configuration on an LER
   to provide protection for a co-routed bidirectional MPLS tunnel.  For
   the working and protection paths of the protection domain, two
   Maintenance Entity Groups (MEGs) need to be configured and each MEG
   contains one ME for a point-to-point transport path.  For more
   information on mplsOamIdMegTable and mplsOamIdMeTable, see [RFC7697].




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   Although the example described in this section shows a way to
   configure linear protection for MPLS-TP tunnels, this also indicates
   how the MIB values would be returned if they had been configured by
   alternative means.

   The following table configures a protection domain.

   In mplsLpsConfigTable:
   mplsLpsConfigEntry ::= SEQUENCE
   {
      -- Protection Domain index (Index to the table)
      mplsLpsConfigDomainIndex  = 3,
      -- Protection Domain name
      mplsLpsConfigDomainName   = "LPDomain3",
      mplsLpsConfigMode         = psc (1),
      mplsLpsConfigProtectionType = oneColonOneBidirectional (2),
      -- Mandatory parameters needed to activate the row go here
      mplsLpsConfigRowStatus   = createAndGo (4)
   }

   The following table associates the MEs with the protection domain.

   In mplsLpsMeConfigTable:
   MplsLpsMeConfigEntry ::= SEQUENCE
   {
      -- MEG index (Index to the table)
      mplsOamIdMegIndex                 = 1,
      -- ME index (Index to the table)
      mplsOamIdMeIndex                  = 1,
      -- MP index (Index to the table)
      mplsOamIdMeMpIndex                = 1,
      -- Protection Domain this ME belongs to
      mplsLpsMeConfigDomain             = 3,
      -- Configuration state
      mplsLpsMeConfigPath               = working(1)
   }
   {
      -- MEG index (Index to the table)
      mplsOamIdMegIndex                 = 2,
      -- ME index (Index to the table)
      mplsOamIdMeIndex                  = 2,
      -- MP index (Index to the table)
      mplsOamIdMeMpIndex                = 2,
      -- Protection Domain this ME belongs to
      mplsLpsMeConfigDomain             = 3,
      -- Configuration state
      mplsLpsMeConfigPath               = protection(2)
   }



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8.  Definitions

   This MIB module makes reference to the following documents:
   [RFC2578], [RFC2579], [RFC2580], [RFC3289], [RFC3411], [RFC3811],
   [RFC6378], [RFC7271], [RFC7697], [G8121], and [G8151].

   MPLS-LPS-MIB DEFINITIONS ::= BEGIN

   IMPORTS
      MODULE-IDENTITY, NOTIFICATION-TYPE, OBJECT-TYPE,
      Counter32, Unsigned32
         FROM SNMPv2-SMI             -- RFC 2578

      MODULE-COMPLIANCE, OBJECT-GROUP, NOTIFICATION-GROUP
         FROM SNMPv2-CONF            -- RFC 2580

      TEXTUAL-CONVENTION, RowStatus, TimeStamp, StorageType, TruthValue
         FROM SNMPv2-TC              -- RFC 2579

      SnmpAdminString
         FROM SNMP-FRAMEWORK-MIB     -- RFC 3411

      IndexIntegerNextFree
         FROM DIFFSERV-MIB           -- RFC 3289

      mplsStdMIB
          FROM MPLS-TC-STD-MIB       -- RFC 3811

      mplsOamIdMegIndex, mplsOamIdMeIndex, mplsOamIdMeMpIndex
          FROM MPLS-OAM-ID-STD-MIB;  -- RFC 7697

   mplsLpsMIB MODULE-IDENTITY
      LAST-UPDATED  "201702170000Z"  -- February 17, 2017
      ORGANIZATION  "Multiprotocol Label Switching (MPLS) Working Group"
      CONTACT-INFO
         "
         Kingston Smiler Selvaraj
         IP Infusion
         RMZ Centennial
         Mahadevapura Post
         Bangalore - 560048 India
         EMail: kingstonsmiler@gmail.com

         Venkatesan Mahalingam
         Dell Inc.
         5450 Great America Parkway,
         Santa Clara,  CA 95054, USA
         Email: venkat.mahalingams@gmail.com



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         Daniel King
         Old Dog Consulting
         UK
         Email:daniel@olddog.co.uk

         Sam Aldrin
         Google, Inc.
         1600 Amphitheatre Parkway
         Mountain View, CA
         USA
         Email:  aldrin.ietf@gmail.com

         Jeong-dong Ryoo
         ETRI
         218 Gajeong-ro
         Yuseong-gu, Daejeon 34129
         South Korea
         Email:ryoo@etri.re.kr
         "
   DESCRIPTION
      "This management information module supports the
       configuration and management of MPLS-TP linear
       protection domains. "
   REVISION
      "201702170000Z"  -- February 17, 2017
      DESCRIPTION
         "MPLS-TP Protection Switching Domain objects for LSP
          MEPs"

      ::= { mplsStdMIB xxx } -- xxx to be replaced with
                             -- correct value

      -- Top level components of this MIB module.
      -- Notifications
      mplsLpsNotifications
         OBJECT IDENTIFIER ::= { mplsLpsMIB 0 }

      -- tables, scalars
      mplsLpsObjects
         OBJECT IDENTIFIER ::= { mplsLpsMIB 1 }

      -- conformance
      mplsLpsConformance
         OBJECT IDENTIFIER ::= { mplsLpsMIB 2 }

   MplsLpsReq ::= TEXTUAL-CONVENTION
      STATUS current
      DESCRIPTION



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         "This Textual Convention describes an object that stores
          the PSC Request field of the PSC control packet. The values
          are as follows:

          noRequest
          No Request

          doNotRevert
          Do Not Revert

          reverseRequest
          Reverse Request

          exercise
          Exercise

          waitToRestore
          Wait-to-Restore

          manualSwitch
          Manual Switch

          signalDegrade
          Signal Degrade (SD)

          signalFail
          Signal Fail (SF)

          forcedSwitch
          Forced Switch

          lockoutOfProtection
          Lockout of Protection"
      REFERENCE
         "Section 4.2.2 of RFC6378 and Section 8 of RFC7271"
      SYNTAX  INTEGER {
                 noRequest (0),
                 doNotRevert (1),
                 reverseRequest (2),
                 exercise (3),
                 waitToRestore (4),
                 manualSwitch (5),
                 signalDegrade (7),
                 signalFail (10),
                 forcedSwitch (12),
                 lockoutOfProtection (14)
              }




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   MplsLpsFpathPath ::= TEXTUAL-CONVENTION
      DISPLAY-HINT "1x:"
      STATUS current
      DESCRIPTION
         "This Textual Convention describes an object that stores
          the Fault Path (FPath) field and Data Path (Path) field of
          the PSC control packet.

          FPath is located in the first octet and Path is
          located in the second octet.

          The value and the interpretation of FPath field is as follows:

          2-255
          for future extensions

          1
          the anomaly condition is on the working path

          0
          the anomaly condition is on the protection path

          The value and the interpretation of Path field is as follows:

          2-255
          for future extensions

          1
          protection path is transporting user data traffic

          0
          protection path is not transporting user data traffic "
      REFERENCE
         "Section 4.2.5 and 4.2.6 of RFC6378"
      SYNTAX      OCTET STRING (SIZE (2))

   MplsLpsCommand ::= TEXTUAL-CONVENTION
      STATUS current
      DESCRIPTION
         "This command allows a user to perform any action over a
          protection domain. If the protection command cannot be
          executed because an equal or higher priority request is
          in effect, an inconsistentValue error is returned.

          The command values are:

          noCmd
          This value should be returned by a read request when no



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          command has been written to the object in question since
          initialization. This value may not be used in a write
          operation. If noCmd is used in a write operation a
          wrongValue error is returned.

          clear
          Clears all of the commands listed below for the protection
          domain.

          lockoutOfProtection
          Prevents switching traffic to the protection path.

          forcedSwitch
          Switches traffic from the working path to the protection path.

          manualSwitchToWork
          Switches traffic from the protection path to the working path.

          manualSwitchToProtect
          Switches traffic from the working path to the protection path.

          exercise
          Used to verify the correct operation of the PSC communication
          and the integrity of the protection path. This command is not
          applicable to the PSC mode.

          freeze
          This command freezes the protection state and is a local
          command that is not signaled to the remote node.
          This command is not applicable to the PSC mode.

          clearfreeze
          Clears the local freeze. This command is not applicable to
          the PSC mode. "
      REFERENCE
         "Sections 3.1 and 3.2 of RFC6378 and Sections 4.3 and 6 of
          RFC7271"
      SYNTAX   INTEGER {
                  noCmd(1),
                  clear(2),
                  lockoutOfProtection(3),
                  forcedSwitch(4),
                  manualSwitchToWork(5),
                  manualSwitchToProtect(6),
                  exercise(7),
                  freeze(8),
                  clearfreeze(9)
               }



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   MplsLpsState ::= TEXTUAL-CONVENTION
      STATUS current
      DESCRIPTION
         "This Textual Convention describes an object that stores
          the current state of the PSC state machine. The values
          are as follows:

          normal
          normal state

          unavLOlocal
          Unavailable state due to local LO command.

          unavSFPlocal
          Unavailable state due to local SF-P.

          unavSDPlocal
          Unavailable state due to local SD-P.

          unavLOremote
          Unavailable state due to remote LO message.

          unavSFPremote
          Unavailable state due to remote SF-P message.

          unavSDPremote
          Unavailable state due to remote SD-P message.

          protfailSFWlocal
          Protecting Failure state due to local SF-W.

          protfailSDWlocal
          Protecting Failure state due to local SD-W.

          protfailSFWremote
          Protecting Failure state due to remote SF-W message.

          protfailSDWremote
          Protecting Failure state due to remote SD-W message.

          switadmFSlocal
          Switching Administrative state due to local FS command.
          Same as Protecting administrative state due to local FS
          command in the PSC mode.

          switadmMSWlocal
          Switching Administrative state due to local MS-W command




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          switadmMSPlocal
          Switching Administrative state due to local MS-P command.
          Same as Protecting administrative state due to local MS
          command in the PSC mode

          switadmFSremote
          Switching Administrative state due to remote FS message.
          Same as Protecting administrative state due to remote FS
          message in the PSC mode.

          switadmMSWremote
          Switching Administrative state due to remote MS-W message

          switadmMSPremote
          Switching Administrative state due to remote MS-P message.
          Same as Protecting administrative state due to remote MS
          message in the PSC mode.

          wtr
          Wait-to-Restore state

          dnr
          Do-not-Revert state

          exerLocal
          Exercise state due to local EXER command.

          exerRemote
          Exercise state due to remote EXER message."
      REFERENCE
         "Section 11 of RFC7271"

      SYNTAX   INTEGER {
                  normal (1),
                  unavLOlocal (2),
                  unavSFPlocal (3),
                  unavSDPlocal (4),
                  unavLOremote (5),
                  unavSFPremote (6),
                  unavSDPremote (7),
                  protfailSFWlocal (8),
                  protfailSDWlocal (9),
                  protfailSFWremote (10),
                  protfailSDWremote (11),
                  switadmFSlocal (12),
                  switadmMSWlocal (13),
                  switadmMSPlocal (14),
                  switadmFSremote (15),



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                  switadmMSWremote (16),
                  switadmMSPremote (17),
                  wtr (18),
                  dnr (19),
                  exerLocal (20),
                  exerRemote (21)
                  }

   -- Start of
   -- MPLS-TP Linear Protection Switching Configuration Table.
   -- This table supports the addition, configuration and deletion
   -- of MPLS-TP linear protection domains.

   mplsLpsConfigDomainIndexNext OBJECT-TYPE
      SYNTAX      IndexIntegerNextFree (0..4294967295)
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "This object contains an unused value for
          mplsLpsConfigDomainIndex, or a zero to indicate
          that none exist.  Negative values are not allowed,
          as they do not correspond to valid values of
          mplsLpsConfigDomainIndex."
      ::= { mplsLpsObjects 1 }

   mplsLpsConfigTable OBJECT-TYPE
      SYNTAX      SEQUENCE OF MplsLpsConfigEntry
      MAX-ACCESS  not-accessible
      STATUS      current
      DESCRIPTION
         "This table lists the MPLS-TP linear protection domains that
          have been configured on the system.
          An entry is created by a network operator who wants to run
          the MPLS-TP linear protection protocol for the protection
          domain."
      ::= { mplsLpsObjects 2 }

   mplsLpsConfigEntry OBJECT-TYPE
      SYNTAX      MplsLpsConfigEntry
      MAX-ACCESS  not-accessible
      STATUS      current
      DESCRIPTION
         "A conceptual row in the mplsLpsConfigTable."
      INDEX { mplsLpsConfigDomainIndex }
      ::= { mplsLpsConfigTable  1 }

   MplsLpsConfigEntry ::= SEQUENCE {
      mplsLpsConfigDomainIndex         Unsigned32,



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      mplsLpsConfigDomainName          SnmpAdminString,
      mplsLpsConfigMode                INTEGER,
      mplsLpsConfigProtectionType      INTEGER,
      mplsLpsConfigRevertive           INTEGER,
      mplsLpsConfigSdThreshold         Unsigned32,
      mplsLpsConfigSdBadSeconds        Unsigned32,
      mplsLpsConfigSdGoodSeconds       Unsigned32,
      mplsLpsConfigWaitToRestore       Unsigned32,
      mplsLpsConfigHoldOff             Unsigned32,
      mplsLpsConfigContinualTxInterval Unsigned32,
      mplsLpsConfigRapidTxInterval     Unsigned32,
      mplsLpsConfigCommand             MplsLpsCommand,
      mplsLpsConfigCreationTime        TimeStamp,
      mplsLpsConfigRowStatus           RowStatus,
      mplsLpsConfigStorageType         StorageType
   }

   mplsLpsConfigDomainIndex OBJECT-TYPE
      SYNTAX        Unsigned32 (1..4294967295)
      MAX-ACCESS    not-accessible
      STATUS        current
      DESCRIPTION
         "Index for the conceptual row identifying a protection domain.
          Operators should obtain new values for row creation in this
          table by reading mplsLpsConfigDomainIndexNext.

          When the value of this object is the same as the value of
          mplsLpsMeConfigDomain, that means that the
          mplsLpsMeConfigDomain is defined as either the working path
          or the protection path for this protection domain."
      ::= { mplsLpsConfigEntry 1 }

   mplsLpsConfigDomainName OBJECT-TYPE
      SYNTAX      SnmpAdminString (SIZE (0..32))
      MAX-ACCESS  read-create
      STATUS      current
      DESCRIPTION
         "Textual name represents the MPLS-TP linear protection domain.
          It facilitates easy administrative identification of
          each protection domain."
      DEFVAL {""}
      ::= { mplsLpsConfigEntry 2 }

   mplsLpsConfigMode OBJECT-TYPE
      SYNTAX INTEGER {
                psc(1),
                aps(2)
                }



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      MAX-ACCESS read-create
      STATUS current
      DESCRIPTION
         "The mode of MPLS-TP linear protection mechanism. This can
          either be PSC or APS as follows:

          PSC
          The Protection State Coordination mode as described in
          RFC 6378.

          APS
          The Automatic Protection Switching mode as described in
          RFC 7271.

          This object may not be modified if the associated
          mplsLpsConfigRowStatus object is equal to active(1).

          The value of this object is not supposed to be changed
          during operation. When the value should be changed,
          the protection processes in both LERs MUST be
          restarted with the same new value.

          In case that this value is changed at one LER during
          operation, the LER will generate PSC packets with a new
          Capabilities TLV value. As a consequence, this will
          result in mplsLpsEventCapabilitiesMismatch notification
          at both LERs. "
      REFERENCE
         "Sections 9.2 and 10 of RFC7271"
      DEFVAL {psc}
      ::= { mplsLpsConfigEntry 3 }

   mplsLpsConfigProtectionType OBJECT-TYPE
      SYNTAX INTEGER {
                onePlusOneUnidirectional (1),
                oneColonOneBidirectional (2),
                onePlusOneBidirectional (3)
                }
      MAX-ACCESS  read-create
      STATUS      current
      DESCRIPTION
         "The protection architecture type of the Protection domain.
          This represents both bridge type, which can be
          either permanent bridge (1+1) or selector bridge (1:1),
          and switching scheme, which can be
          either unidirectional or bidirectional.

          1+1



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          In the 1+1 protection scheme, a fully dedicated protection
          path is allocated. Data traffic is copied and fed
          at the source to both the working and the protection path.
          The traffic on the working and the protection paths is
          transmitted simultaneously to the sink of the protection
          domain, where selection between the working and protection
          paths is performed

          1:1
          In the 1:1 scheme, a protection path is allocated to
          protect against a defect, failure, or a degradation in the
          working path. In normal conditions, data traffic is
          transmitted over the working path, while the protection path
          functions in the idle state. If there is a defect on the
          working path or a specific administrative request,
          traffic is switched to the protection path.

          bidirectional
          In bidirectional protection scheme, both the directions
          will be switched simultaneously even if the fault applies
          to only one direction of the path.

          unidirectional
          In unidirectional protection scheme protection switching
          will be performed independently for each direction of a
          bidirectional transport path.

          This object may not be modified if the associated
          mplsLpsConfigRowStatus object is equal to active(1). "
      REFERENCE
         "Section 4.2.3 of RFC6378"
      DEFVAL {oneColonOneBidirectional}
      ::= { mplsLpsConfigEntry 4 }

   mplsLpsConfigRevertive OBJECT-TYPE
      SYNTAX      INTEGER { nonrevertive(1), revertive(2) }
      MAX-ACCESS  read-create
      STATUS      current
      DESCRIPTION
         "This object represents the reversion mode of the linear
          protection domain. The reversion mode of protection
          mechanism may be either revertive or non-revertive.

          nonrevertive
          In non-revertive mode, after a service has been recovered,
          traffic will be forwarded on the protection path.

          revertive



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          In revertive mode, after a service has been recovered,
          traffic will be redirected back onto the original working
          path.

          This object may not be modified if the associated
          mplsLpsConfigRowStatus object is equal to active(1). "
      REFERENCE
         "Section 4.2.4 of RFC6378"
      DEFVAL { revertive }
      ::= { mplsLpsConfigEntry 5 }

   mplsLpsConfigSdThreshold OBJECT-TYPE
      SYNTAX      Unsigned32 (0..100)
      MAX-ACCESS  read-create
      STATUS      current
      DESCRIPTION
         "This object holds the threshold value of the Signal Degrade
          (SD) defect in percent. In order to detect the SD defect,
          the MPLS-TP packet loss measurement (LM) is performed
          every second.

          If either the packet loss is negative (i.e., there are more
          packets received than transmitted) or the packet loss ratio
          (lost packets/transmitted packets) in percent is greater than
          this threshold value, a Bad Second is declared.
          Otherwise, a Good Second is declared.

          The SD defect is detected if there are
          mplsLpsConfigSdBadSeconds consecutive Bad Seconds
          and cleared if there are
          mplsLpsConfigSdGoodSeconds consecutive Good Seconds.

          This object may be modified if the associated
          mplsLpsConfigRowStatus object is equal to active(1)."
      REFERENCE
         "Clause 6.1.3.3 of [G8121] and Table 8-1 of [G8151]"
      DEFVAL { 30 }
      ::= { mplsLpsConfigEntry 6 }

   mplsLpsConfigSdBadSeconds OBJECT-TYPE
      SYNTAX      Unsigned32 (2..10)
      UNITS       "seconds"
      MAX-ACCESS  read-create
      STATUS      current
      DESCRIPTION
         "This object holds the number of Bad Seconds to detect the SD.

          If the number of consecutive Bad Seconds reaches this value,



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          the SD defect is detected and used as an input to
          the protection switching process.

          This object may be modified if the associated
          mplsLpsConfigRowStatus object is equal to active(1). "
      REFERENCE
         "Clause 6.1.3.3 of [G8121] and Table 8-1 of [G8151]"
      DEFVAL { 10 }
      ::= { mplsLpsConfigEntry 7 }

   mplsLpsConfigSdGoodSeconds OBJECT-TYPE
      SYNTAX      Unsigned32 (2..10)
      UNITS       "seconds"
      MAX-ACCESS  read-create
      STATUS      current
      DESCRIPTION
         "This object holds the number of Good Seconds to declare
          the clearance of SD defect.

          After an SD defect occurs at a path, if the number of
          consecutive Good Seconds reaches this value for the
          degraded path, the clearance of SD defect is declared and
          used as an input to the protection switching process.

          This object may be modified if the associated
          mplsLpsConfigRowStatus object is equal to active(1)."
      REFERENCE
         "Clause 6.1.3.3 of [G8121] and Table 8-1 of [G8151]"
      DEFVAL { 10 }
      ::= { mplsLpsConfigEntry 8 }

   mplsLpsConfigWaitToRestore OBJECT-TYPE
      SYNTAX      Unsigned32 (5..12)
      UNITS       "minutes"
      MAX-ACCESS  read-create
      STATUS      current
      DESCRIPTION
         "This object holds the Wait To Restore timer value in minutes,
          and can be configured in 1 minute steps between 5 and
          12 minutes.

          The WTR timer is used to delay reversion of PSC state
          to Normal state when recovering from a failure
          condition on the working path when the protection
          domain is configured for revertive behavior

          This object may not be modified if the associated
          mplsLpsConfigRowStatus object is equal to active(1)."



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      REFERENCE
         "Section 3.5 of RFC6378"
      DEFVAL { 5 }
      ::= { mplsLpsConfigEntry 9 }

   mplsLpsConfigHoldOff   OBJECT-TYPE
      SYNTAX     Unsigned32 (0..100)
      UNITS      "deciseconds"
      MAX-ACCESS read-create
      STATUS     current
      DESCRIPTION
         "The hold-off time in deciseconds. Represents the time
          between SF/SD condition detection and declaration of
          an SF/SD request to the protection switching logic.
          It is intended to avoid unnecessary switching when a lower-
          layer protection mechanism is in place.
          Can be configured in steps of 100 milli-seconds.

          When a new defect or more severe defect occurs at
          the active path (the path from which the selector selects
          the user data traffic) and this value is non-zero,
          the hold-off timer will be started. A defect on the standby
          path (the path from which the selector does not select the
          user data traffic) does not trigger the start of the hold-off
          timer as there is no need for a traffic switchover.

          This object may not be modified if the associated
          mplsLpsConfigRowStatus object is equal to active(1). "
      REFERENCE
         "Section 3.1 of RFC6378"
      DEFVAL { 0 }
      ::= { mplsLpsConfigEntry 10 }

   mplsLpsConfigContinualTxInterval OBJECT-TYPE
      SYNTAX      Unsigned32 (1..20)
      UNITS       "seconds"
      MAX-ACCESS  read-create
      STATUS      current
      DESCRIPTION
         "The Continual Tx Time in Seconds. Represents the time
          interval to send the continual LPS packet to the other
          end based on the current state.

          This object may not be modified if the associated
          mplsLpsConfigRowStatus object is equal to active(1). "
      REFERENCE
         "Section 4.1 of RFC6378"
      DEFVAL { 5 }



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      ::= { mplsLpsConfigEntry 11 }

   mplsLpsConfigRapidTxInterval OBJECT-TYPE
      SYNTAX      Unsigned32 (1000..20000)
      UNITS       "micro-seconds"
      MAX-ACCESS  read-create
      STATUS      current
      DESCRIPTION
         "The Rapid Tx interval in micro-Seconds. Represents the time
          interval to send the LPS packet to the other end, when
          there is a change in state of linear protection domain due
          to local input. The default value is 3.3 milli-seconds
          which is 3300 micro-seconds

          This object may not be modified if the associated
          mplsLpsConfigRowStatus object is equal to active(1). "
      REFERENCE
         "Section 4.1 of RFC6378"
      DEFVAL { 3300 }
      ::= { mplsLpsConfigEntry 12 }

   mplsLpsConfigCommand OBJECT-TYPE
      SYNTAX      MplsLpsCommand
      MAX-ACCESS  read-create
      STATUS      current
      DESCRIPTION
         "Allows the initiation of an operator command on
          the protection domain.

          When read this object returns the last command written
          or noCmd if no command has been written
          since initialization. The return of the last command
          written does not imply that this command is currently in
          effect.  This request may have been preempted by a higher
          priority local or remote request.

          This object may be modified if the associated
          mplsLpsConfigRowStatus object is equal to active(1). "
      REFERENCE
         "Sections 3.1 and 3.2 of RFC6378 and Sections 4.3 and 6 of
          RFC7271"
      DEFVAL { noCmd }
      ::= { mplsLpsConfigEntry 13 }

   mplsLpsConfigCreationTime OBJECT-TYPE
      SYNTAX      TimeStamp
      MAX-ACCESS  read-only
      STATUS      current



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      DESCRIPTION
         "The value of sysUpTime at the time the row was created."
      ::= { mplsLpsConfigEntry 14 }

   mplsLpsConfigRowStatus OBJECT-TYPE
      SYNTAX      RowStatus
      MAX-ACCESS  read-create
      STATUS      current
      DESCRIPTION
         "This represents the status of the MPLS-TP linear
          protection domain entry. This variable is used to
          create, modify, and/or delete a row in this table."
      ::= { mplsLpsConfigEntry 15 }

   mplsLpsConfigStorageType OBJECT-TYPE
      SYNTAX      StorageType
      MAX-ACCESS  read-create
      STATUS      current
      DESCRIPTION
         "The storage type for this conceptual row.
          Conceptual rows having the value 'permanent' need not
          allow write-access to any columnar objects in the row."
      DEFVAL      { nonVolatile }
      ::= { mplsLpsConfigEntry 16 }

   --
   -- MPLS-TP Linear Protection Switching Status Table
   -- This table provides Protection Switching domain statistics.
   --

   mplsLpsStatusTable OBJECT-TYPE
      SYNTAX      SEQUENCE OF MplsLpsStatusEntry
      MAX-ACCESS  not-accessible
      STATUS      current
      DESCRIPTION
         "This table provides status information about MPLS-TP
          linear protection domains that have been configured
          on the system."
      ::= { mplsLpsObjects 3 }

   mplsLpsStatusEntry OBJECT-TYPE
      SYNTAX      MplsLpsStatusEntry
      MAX-ACCESS  not-accessible
      STATUS      current
      DESCRIPTION
         "A conceptual row in the mplsLpsStatusTable."
      AUGMENTS { mplsLpsConfigEntry }
      ::= { mplsLpsStatusTable  1 }



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   MplsLpsStatusEntry ::= SEQUENCE {
      mplsLpsStatusState                 MplsLpsState,
      mplsLpsStatusReqRcv                MplsLpsReq,
      mplsLpsStatusReqSent               MplsLpsReq,
      mplsLpsStatusFpathPathRcv          MplsLpsFpathPath,
      mplsLpsStatusFpathPathSent         MplsLpsFpathPath,
      mplsLpsStatusRevertiveMismatch     TruthValue,
      mplsLpsStatusProtecTypeMismatch    TruthValue,
      mplsLpsStatusCapabilitiesMismatch  TruthValue,
      mplsLpsStatusPathConfigMismatch    TruthValue,
      mplsLpsStatusFopNoResponses        Counter32,
      mplsLpsStatusFopTimeouts           Counter32
   }

   mplsLpsStatusState OBJECT-TYPE
      SYNTAX      MplsLpsState
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "The current state of the PSC state machine."
      REFERENCE
         "Section 11 of RFC7271"
      ::= { mplsLpsStatusEntry 1 }

   mplsLpsStatusReqRcv OBJECT-TYPE
      SYNTAX      MplsLpsReq
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "The current value of the PSC Request field received on
          the most recent PSC packet."
      REFERENCE
         "Section 4.2 of RFC6378"
      ::= { mplsLpsStatusEntry 2 }

   mplsLpsStatusReqSent OBJECT-TYPE
      SYNTAX      MplsLpsReq
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "The current value of the PSC Request field sent on the
          most recent PSC packet."
      REFERENCE
         "Section 4.2 of RFC6378"
      ::= { mplsLpsStatusEntry 3 }

   mplsLpsStatusFpathPathRcv OBJECT-TYPE
      SYNTAX      MplsLpsFpathPath



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      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "The current value of the FPath and Path fields received
          on the most recent PSC packet."
      REFERENCE
         "Section 4.2 of RFC6378"
      ::= { mplsLpsStatusEntry 4 }

   mplsLpsStatusFpathPathSent OBJECT-TYPE
      SYNTAX      MplsLpsFpathPath
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
         "The current value of the FPath and Path fields sent
          on the most recent PSC packet."
      REFERENCE
         "Section 4.2 of RFC6378"
      ::= { mplsLpsStatusEntry 5 }

   mplsLpsStatusRevertiveMismatch OBJECT-TYPE
      SYNTAX     TruthValue
      MAX-ACCESS read-only
      STATUS     current
      DESCRIPTION
         "This object indicates the provisioning mismatch in
          revertive mode across the protection domain end points.
          The value of this object becomes true when a PSC message with
          incompatible Revertive field is received, or false
          when a PSC message with compatible Revertive field is
          received. "
      REFERENCE
         "Section 12 of RFC7271"
      ::= { mplsLpsStatusEntry 6 }

   mplsLpsStatusProtecTypeMismatch OBJECT-TYPE
      SYNTAX     TruthValue
      MAX-ACCESS read-only
      STATUS     current
      DESCRIPTION
         "This object indicates the provisioning mismatch in
          protection type, representing both bridge and switching types,
          across the protection domain end points.
          The value of this object becomes true when a PSC message with
          incompatible PT field is received, or false
          when a PSC message with compatible PT field is received. "
      REFERENCE
         "Section 12 of RFC7271"



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      ::= { mplsLpsStatusEntry 7 }

   mplsLpsStatusCapabilitiesMismatch OBJECT-TYPE
      SYNTAX     TruthValue
      MAX-ACCESS read-only
      STATUS     current
      DESCRIPTION
         "This object indicates the provisioning mismatch in
          Capabilities TLVs across the protection domain end points.
          The value of this object becomes true when a PSC message with
          incompatible Capabilities TLV field is received, or false
          when a PSC message with compatible Capabilities TLV field is
          received.

          The Capabilities TLV with 0xF8000000 indicates that the APS
          mode is used for MPLS-TP linear protection mechanism,
          whereas PSC mode uses either the Capabilities TLV with Ox0
          or no existence of the Capabilities TLV."
      REFERENCE
         "Section 12 of RFC7271"
      ::= { mplsLpsStatusEntry 8 }

   mplsLpsStatusPathConfigMismatch OBJECT-TYPE
      SYNTAX     TruthValue
      MAX-ACCESS read-only
      STATUS     current
      DESCRIPTION
         "This object indicates the provisioning mismatch in the
          protection path configuration for PSC communication across
          the protection domain end points.

          The value of this object becomes true when a PSC message is
          received from the working path, or false when a PSC message
          is received from the protection path."
      REFERENCE
         "Section 12 of RFC7271"
      ::= { mplsLpsStatusEntry 9 }

   mplsLpsStatusFopNoResponses OBJECT-TYPE
      SYNTAX     Counter32
      MAX-ACCESS read-only
      STATUS     current
      DESCRIPTION
         "This object holds the number of occurrences of the failure
          of protocol due to a lack of response to a traffic switchover
          request within in 50 ms.

          When there is a traffic switchover due to a local request,



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          a 50 ms timer is started to detect the failure of protocol
          due to no response. If there is no PSC message is received
          with the same Path value as in the transmitted PSC message
          until the 50 ms timer expires, the failure of protocol due to
          no response occurs."
      REFERENCE
         "Section 12 of RFC7271"
      ::= { mplsLpsStatusEntry 10 }

   mplsLpsStatusFopTimeouts OBJECT-TYPE
      SYNTAX     Counter32
      MAX-ACCESS read-only
      STATUS     current
      DESCRIPTION
         "This object holds the number of occurrences of the failure
          of protocol due to no PSC message received during at least
          3.5 times the long PSC message interval.

          When no PSC message is received on the protection path during
          at least 3.5 times the long PSC message interval and there
          is no defect on the protection path, the failure of protocol
          due to no PSC message occurs."
      REFERENCE
         "Section 12 of RFC7271"
      ::= { mplsLpsStatusEntry 11 }

   -- MPLS-TP Linear Protection ME Association Configuration Table
   -- This table supports the addition, configuration and deletion
   -- of MPLS-TP Linear Protection Maintenance Entities in protection
   -- domains.

   mplsLpsMeConfigTable OBJECT-TYPE
      SYNTAX      SEQUENCE OF MplsLpsMeConfigEntry
      MAX-ACCESS  not-accessible
      STATUS      current
      DESCRIPTION
         "This table lists Maintenance Association that have been
          configured in Protection domains."
      ::= { mplsLpsObjects 4 }

   mplsLpsMeConfigEntry OBJECT-TYPE
      SYNTAX      MplsLpsMeConfigEntry
      MAX-ACCESS  not-accessible
      STATUS      current
      DESCRIPTION
        "A conceptual row in the mplsLpsMeConfigTable. There is
         a sparse relationship between the conceptual rows of
         this table and mplsOamIdMeTable.



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         Each time that an entry is created in the mplsOamIdMeTable
         for which the LER supports MPLS-TP linear protection,
         a row is created automatically in the mplsLpsMeConfigTable.

         An entry of this table is related to a single entry in
         mplsOamIdMeTable.  When a point-to-point transport path
         needs to be monitored, one ME is needed for the path
         and one entry in the mplsOamIdMeTable will be created.
         But, the ME entry in the mplsOamIdMeTable may or may not
         participate in protection switching.

         If an ME participates in protection switching,
         an entry in mplsLpsMeConfigTable MUST be created,
         and the objects in the entry indicates
         which protection domain this ME belongs to and
         whether this ME is for either working path or protection path.

         If the ME does not participate in protection switching,
         an entry in mplsLpsMeConfigTable does not need to be created. "
      INDEX {mplsOamIdMegIndex, mplsOamIdMeIndex, mplsOamIdMeMpIndex}
      ::= { mplsLpsMeConfigTable  1 }

   MplsLpsMeConfigEntry ::= SEQUENCE {
      mplsLpsMeConfigDomain                Unsigned32,
      mplsLpsMeConfigPath                  INTEGER
   }

   mplsLpsMeConfigDomain  OBJECT-TYPE
      SYNTAX        Unsigned32 (0..4294967295)
      MAX-ACCESS    read-create
      STATUS        current
      DESCRIPTION
         "This object holds the value of protection domain index wherein
          this ME is included. If this ME is not part of any
          protection domain then this object contains value 0.

          When the value of this object is the same as the value of
          mplsLpsConfigDomainIndex, that means that the object is
          defined as either the working path or the protection path
          of the protection domain corresponding to
          mplsLpsConfigDomainIndex."
      DEFVAL { 0 }
      ::= { mplsLpsMeConfigEntry 1 }

   mplsLpsMeConfigPath OBJECT-TYPE
      SYNTAX      INTEGER { working(1), protection(2) }
      MAX-ACCESS  read-create
      STATUS      current



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      DESCRIPTION
         "This object represents whether the ME is configured
          as either the working path or the protection path"
      REFERENCE
         "Section 4.3 of RFC6378"
      ::= { mplsLpsMeConfigEntry 2 }

   --
   -- MPLS Linear Protection ME Status Table
   -- This table provides Protection Switching ME statistics.
   --

   mplsLpsMeStatusTable OBJECT-TYPE
      SYNTAX      SEQUENCE OF MplsLpsMeStatusEntry
      MAX-ACCESS  not-accessible
      STATUS      current
      DESCRIPTION
         "This table contains status information of all the MEs
          that are included in MPLS-TP linear protection domains."
      ::= { mplsLpsObjects 5 }

   mplsLpsMeStatusEntry OBJECT-TYPE
      SYNTAX      MplsLpsMeStatusEntry
      MAX-ACCESS  not-accessible
      STATUS      current
      DESCRIPTION
         "A conceptual row in the mplsLpsMeStatusTable."
      AUGMENTS { mplsLpsMeConfigEntry }
      ::= { mplsLpsMeStatusTable  1 }

   MplsLpsMeStatusEntry ::= SEQUENCE {
      mplsLpsMeStatusCurrent               BITS,
      mplsLpsMeStatusSignalDegrades        Counter32,
      mplsLpsMeStatusSignalFailures        Counter32,
      mplsLpsMeStatusSwitchovers           Counter32,
      mplsLpsMeStatusLastSwitchover        TimeStamp,
      mplsLpsMeStatusSwitchoverSeconds     Counter32
   }

   mplsLpsMeStatusCurrent OBJECT-TYPE
      SYNTAX   BITS {
               localSelectTraffic(0),
               localSD(1),
               localSF(2)
               }
      MAX-ACCESS read-only
      STATUS     current
      DESCRIPTION



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         "Indicates the current state of the ME.

          localSelectTraffic
          This bit indicates that traffic is being selected from
          this ME.

          localSD
          This bit implies that local signal degrade condition is
          in effect on this ME / path.

          localSF
          This bit implies that local signal failure condition is
          in effect on this ME / path."
      REFERENCE
         "Section 4.3 of RFC6378 and Section 7 of RFC7271"
      ::= { mplsLpsMeStatusEntry 1 }

   mplsLpsMeStatusSignalDegrades OBJECT-TYPE
      SYNTAX     Counter32
      MAX-ACCESS read-only
      STATUS     current
      DESCRIPTION
         "Represents the count of Signal Degrade conditions.
          For the detection and clearance of Signal Degrade,
          see the description of mplsLpsConfigSdThreshold."
      REFERENCE
         "Section 7 of RFC7271"
      ::= { mplsLpsMeStatusEntry 2 }

   mplsLpsMeStatusSignalFailures OBJECT-TYPE
      SYNTAX     Counter32
      MAX-ACCESS read-only
      STATUS     current
      DESCRIPTION
         "Represents the count of Signal failure conditions.
          This condition occurs when the OAM running on this ME
          detects the Signal Fail event."
      REFERENCE
         "Section 4.3 of RFC6378"
      ::= { mplsLpsMeStatusEntry 3 }

   mplsLpsMeStatusSwitchovers OBJECT-TYPE
      SYNTAX     Counter32
      MAX-ACCESS read-only
      STATUS     current
      DESCRIPTION
         "Represents the count of SwitchOvers happened in this ME.




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          When the mplsLpsMeConfigPath is working, this object will
          return the number of times that traffic has been switched
          from this working path to the protection path.

          When the mplsLpsMeConfigPath is protection, this object
          will return the number of times that traffic has been
          switched back to the working path from this protection path."
      REFERENCE
         "Section 4.3 of RFC6378"
      ::= { mplsLpsMeStatusEntry 4 }

   mplsLpsMeStatusLastSwitchover OBJECT-TYPE
      SYNTAX     TimeStamp
      MAX-ACCESS read-only
      STATUS     current
      DESCRIPTION
         "This object holds the value of sysUpTime wherein the
          last switchover happened.

          When the mplsLpsMeConfigPath is working, this object
          will return the value of sysUpTime when traffic was switched
          from this path to the protection path.

          If traffic has never switched to the protection path, the
          value 0 will be returned.

          When the mplsLpsMeConfigPath is protection, this object
          will return the value of sysUpTime the last time that
          traffic was switched back to the working path from this path.
          If no traffic has ever switched back to the working path from
          this protection path, the value 0 will be returned."
      REFERENCE
         "Section 4.3 of RFC6378"
      ::= { mplsLpsMeStatusEntry 5 }

   mplsLpsMeStatusSwitchoverSeconds OBJECT-TYPE
      SYNTAX     Counter32
      UNITS      "seconds"
      MAX-ACCESS read-only
      STATUS     current
      DESCRIPTION
         "The cumulative Protection Switching Duration (PSD) time
          in seconds.

          For the working path, this is the cumulative number of
          seconds that traffic was selected from the protection path.

          For the protection path, this is the cumulative number



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          of seconds that the working path has been used to
          select traffic."
      REFERENCE
         "Section 4.3 of RFC6378"
      ::= { mplsLpsMeStatusEntry 6 }


   mplsLpsNotificationEnable OBJECT-TYPE
      SYNTAX     BITS {
                 switchover(0),
                 revertiveMismatch(1),
                 protecTypeMismatch(2),
                 capabilitiesMismatch(3),
                 pathConfigMismatch(4),
                 fopNoResponse(5),
                 fopTimeout(6)
                 }
      MAX-ACCESS read-write
      STATUS     current
      DESCRIPTION
         "Provides the ability to enable and disable notifications
          defined in this MIB module.

          switchover
          Indicates mplsLpsEventSwitchover notifications should be
          generated.

          revertiveMismatch
          Indicates mplsLpsEventRevertiveMismatch notifications
          should be generated.

          protecTypeMismatch
          Indicates mplsLpsEventProtecTypeMismatch notifications
          should be generated.

          capabilitiesMismatch
          Indicates mplsLpsEventCapabilitiesMismatch notifications
          should be generated.

          pathConfigMismatch
          Indicates mplsLpsEventPathConfigMismatch notifications
          should be generated.

          fopNoResponse
          Indicates mplsLpsEventFopNoResponse notifications
          should be generated.

          fopTimeout



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          Indicates mplsLpsEventFopTimeout notifications
          should be generated."
      REFERENCE
         "Section 12 of RFC7271"
      DEFVAL { { } }
      ::= { mplsLpsObjects 6 }

   -- MPLS Linear Protection EVENTS

   mplsLpsEventSwitchover NOTIFICATION-TYPE
      OBJECTS { mplsLpsMeStatusSwitchovers, mplsLpsMeStatusCurrent }
      STATUS  current
      DESCRIPTION
         "An mplsLpsEventSwitchover notification is sent when the
          value of an instance of mplsLpsMeStatusSwitchovers
          increments."
      ::= { mplsLpsNotifications 1 }

   mplsLpsEventRevertiveMismatch NOTIFICATION-TYPE
      OBJECTS { mplsLpsStatusRevertiveMismatch }
      STATUS  current
      DESCRIPTION
         "An mplsLpsEventRevertiveMismatch notification is sent when
          the value of mplsLpsStatusRevertiveMismatch changes."
      ::= { mplsLpsNotifications 2 }

   mplsLpsEventProtecTypeMismatch NOTIFICATION-TYPE
      OBJECTS { mplsLpsStatusProtecTypeMismatch }
      STATUS  current
      DESCRIPTION
         "An mplsLpsEventProtecTypeMismatch notification is sent
          when the value of mplsLpsStatusProtecTypeMismatch changes."
      ::= { mplsLpsNotifications 3 }

   mplsLpsEventCapabilitiesMismatch NOTIFICATION-TYPE
      OBJECTS { mplsLpsStatusCapabilitiesMismatch }
      STATUS  current
      DESCRIPTION
         "An mplsLpsEventCapabilitiesMismatch notification is sent
          when the value of mplsLpsStatusCapabilitiesMismatch changes."
      ::= { mplsLpsNotifications 4 }

   mplsLpsEventPathConfigMismatch NOTIFICATION-TYPE
      OBJECTS { mplsLpsStatusPathConfigMismatch }
      STATUS  current
      DESCRIPTION
         "An mplsLpsEventPathConfigMismatch notification is sent
          when the value of mplsLpsStatusPathConfigMismatch changes."



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      ::= { mplsLpsNotifications 5 }

   mplsLpsEventFopNoResponse NOTIFICATION-TYPE
      OBJECTS { mplsLpsStatusFopNoResponses }
      STATUS  current
      DESCRIPTION
         "An mplsLpsEventFopNoResponse notification is sent when the
          value of mplsLpsStatusFopNoResponses increments."
      ::= { mplsLpsNotifications 6 }

   mplsLpsEventFopTimeout NOTIFICATION-TYPE
      OBJECTS { mplsLpsStatusFopTimeouts }
      STATUS  current
      DESCRIPTION
         "An mplsLpsEventFopTimeout notification is sent when the
          value of mplsLpsStatusFopTimeouts increments."
      ::= { mplsLpsNotifications 7 }

   -- End of Notifications.

   -- Module Compliance.

   mplsLpsCompliances
      OBJECT IDENTIFIER ::= { mplsLpsConformance 1 }

   mplsLpsGroups
      OBJECT IDENTIFIER ::= { mplsLpsConformance 2 }

   -- Compliance requirement for fully compliant implementations.

   mplsLpsModuleFullCompliance MODULE-COMPLIANCE
      STATUS       current
      DESCRIPTION
         "Compliance statement for agents that provide full
          support for MPLS-LPS-MIB. Such devices can
          provide linear protection and also be configured using
          this MIB module."
      MODULE -- This module.
      MANDATORY-GROUPS {
         mplsLpsScalarGroup,
         mplsLpsTableGroup,
         mplsLpsMeTableGroup
      }
      GROUP        mplsLpsNotificationGroup
      DESCRIPTION
         "This group is only mandatory for those
          implementations which can efficiently implement
          the notifications contained in this group."



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      ::= { mplsLpsCompliances 1 }

   -- Compliance requirement for read-only implementations

   mplsLpsModuleReadOnlyCompliance MODULE-COMPLIANCE
      STATUS current
      DESCRIPTION
         "Compliance statement for agents that only provide
          read-only support for the MPLS-LPS-MIB module."

      MODULE -- this module

      MANDATORY-GROUPS    {
         mplsLpsScalarGroup,
         mplsLpsTableGroup,
         mplsLpsMeTableGroup
      }
      GROUP        mplsLpsNotificationGroup
      DESCRIPTION
         "This group is only mandatory for those
          implementations which can efficiently implement
          the notifications contained in this group."

      -- mplsLpsConfigTable

      OBJECT      mplsLpsConfigMode
      MIN-ACCESS  read-only
      DESCRIPTION
            "Write access is not required."

      OBJECT      mplsLpsConfigProtectionType
      MIN-ACCESS  read-only
      DESCRIPTION
            "Write access is not required."

      OBJECT      mplsLpsConfigRevertive
      MIN-ACCESS  read-only
      DESCRIPTION
            "Write access is not required."

      OBJECT      mplsLpsConfigSdThreshold
      MIN-ACCESS  read-only
      DESCRIPTION
            "Write access is not required."

      OBJECT      mplsLpsConfigSdBadSeconds
      MIN-ACCESS  read-only
      DESCRIPTION



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            "Write access is not required."

      OBJECT      mplsLpsConfigSdGoodSeconds
      MIN-ACCESS  read-only
      DESCRIPTION
            "Write access is not required."

      OBJECT      mplsLpsConfigWaitToRestore
      MIN-ACCESS  read-only
      DESCRIPTION
            "Write access is not required."

      OBJECT      mplsLpsConfigContinualTxInterval
      MIN-ACCESS  read-only
      DESCRIPTION
            "Write access is not required."

      OBJECT      mplsLpsConfigRapidTxInterval
      MIN-ACCESS  read-only
      DESCRIPTION
            "Write access is not required."

      OBJECT      mplsLpsConfigCommand
      MIN-ACCESS  read-only
      DESCRIPTION
            "Write access is not required."

      OBJECT      mplsLpsConfigRowStatus
      SYNTAX      RowStatus { active(1) }
      MIN-ACCESS  read-only
      DESCRIPTION
            "Write access is not required."

      OBJECT      mplsLpsConfigStorageType
      MIN-ACCESS  read-only
      DESCRIPTION
            "Write access is not required."

      -- mplsLpsMeConfigTable

      OBJECT      mplsLpsMeConfigDomain
      MIN-ACCESS  read-only
      DESCRIPTION
            "Write access is not required."

      OBJECT      mplsLpsMeConfigPath
      MIN-ACCESS  read-only
      DESCRIPTION



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            "Write access is not required."

      ::= { mplsLpsCompliances 2 }

   -- Units of conformance.

   mplsLpsScalarGroup OBJECT-GROUP
      OBJECTS {
              mplsLpsConfigDomainIndexNext,
              mplsLpsNotificationEnable
              }
      STATUS  current
      DESCRIPTION
         "Collection of objects needed for MPLS Linear Protection."
      ::= { mplsLpsGroups 1 }

   mplsLpsTableGroup OBJECT-GROUP
      OBJECTS {
         mplsLpsConfigDomainName,
         mplsLpsConfigRowStatus,
         mplsLpsConfigMode,
         mplsLpsConfigProtectionType,
         mplsLpsConfigRevertive,
         mplsLpsConfigSdThreshold,
         mplsLpsConfigSdBadSeconds,
         mplsLpsConfigSdGoodSeconds,
         mplsLpsConfigWaitToRestore,
         mplsLpsConfigHoldOff,
         mplsLpsConfigContinualTxInterval,
         mplsLpsConfigRapidTxInterval,
         mplsLpsConfigCommand,
         mplsLpsConfigCreationTime,
         mplsLpsConfigStorageType,
         mplsLpsStatusState,
         mplsLpsStatusReqRcv,
         mplsLpsStatusReqSent,
         mplsLpsStatusFpathPathRcv,
         mplsLpsStatusFpathPathSent,
         mplsLpsStatusRevertiveMismatch,
         mplsLpsStatusProtecTypeMismatch,
         mplsLpsStatusCapabilitiesMismatch,
         mplsLpsStatusPathConfigMismatch,
         mplsLpsStatusFopNoResponses,
         mplsLpsStatusFopTimeouts
         }
      STATUS  current
      DESCRIPTION
         "Collection of objects needed for MPLS Linear Protection



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          configuration and statistics."
      ::= { mplsLpsGroups 2 }

   mplsLpsMeTableGroup OBJECT-GROUP
      OBJECTS {
         mplsLpsMeConfigDomain,
         mplsLpsMeConfigPath,
         mplsLpsMeStatusCurrent,
         mplsLpsMeStatusSignalDegrades,
         mplsLpsMeStatusSignalFailures,
         mplsLpsMeStatusSwitchovers,
         mplsLpsMeStatusLastSwitchover,
         mplsLpsMeStatusSwitchoverSeconds
         }
      STATUS  current
      DESCRIPTION
         "Collection of objects needed for MPLS Linear Protection
          ME configuration and statistics."
      ::= { mplsLpsGroups 3 }

   mplsLpsNotificationGroup NOTIFICATION-GROUP
      NOTIFICATIONS {
         mplsLpsEventSwitchover,
         mplsLpsEventRevertiveMismatch,
         mplsLpsEventProtecTypeMismatch,
         mplsLpsEventCapabilitiesMismatch,
         mplsLpsEventPathConfigMismatch,
         mplsLpsEventFopNoResponse,
         mplsLpsEventFopTimeout
         }
      STATUS  current
      DESCRIPTION
             "Collection of objects needed to implement notifications."
      ::= { mplsLpsGroups 4 }

   -- MPLS-LPS-MIB module ends
   END

9.  Security Considerations

   There are a number of management objects defined in this MIB module
   with a MAX-ACCESS clause of read-write and/or read-create.  Such
   objects may be considered sensitive or vulnerable in some networks in
   a non-secure environment without proper protection can have a
   negative effect on network operations.  These are the tables and
   objects and their sensitivity/vulnerability:





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   o  mplsLpsConfigTable is used to configure MPLS-TP linear protection
      domains.  Improper manipulation of the objects in this table may
      result in different behaviors than network operators have
      originally intended, such as delaying traffic switching or causing
      a race condition with server layer protection after network
      failure (mplsLpsConfigHoldOff), delaying or speeding up reversion
      after recovering network failure (mplsLpsConfigWaitToRestore),
      unexpected traffic switching (mplsLpsConfigCommand), or
      discontinuance of operation of a protection switching control
      process (mplsLpsConfigMode, mplsLpsConfigProtectionType).

   o  mplsLpsMeConfigTable is used to assign each ME either working or
      protection path.  Improper manipulation of this object may result
      in discontinuance of operation of a protection switching control
      process.

   o  The notification is controlled by mplsLpsNotificationEnable
      object.  In the case of the discontinuance of a protection
      switching control process, network operators may not be notified
      if the mplsLpsNotificationEnable object is compromised.

   Some of the readable objects in this MIB module (i.e., objects with a
   MAX-ACCESS other than not-accessible) may be considered sensitive or
   vulnerable in some network environments.  It is thus important to
   control even GET and/or NOTIFY access to these objects and possibly
   to even encrypt the values of these objects when sending them over
   the network via SNMP.  These are the tables and objects and their
   sensitivity/vulnerability:

   o  mplsLpsStatusTable and mplsLpsMeStatusTable collectively show the
      history and current status of the MPLS-TP linear protection
      domains.  They can be used to estimate the performances and
      qualities of the network being operated with the MPLS-TP linear
      protection.  If an administrator does not want to reveal this
      information, then these tables should be considered sensitive/
      vulnerable.

   SNMP versions prior to SNMPv3 did not include adequate security.
   Even if the network itself is secure (for example by using IPsec),
   there is no control as to who on the secure network is allowed to
   access and GET/SET (read/change/create/delete) the objects in this
   MIB module.

   Implementations SHOULD provide the security features described by the
   SNMPv3 framework (see [RFC3410]), and implementations claiming
   compliance to the SNMPv3 standard MUST include full support for
   authentication and privacy via the User-based Security Model (USM)
   RFC 3414 [RFC3414] with the AES cipher algorithm RFC 3826 [RFC3826].



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   Implementations MAY also provide support for the Transport Security
   Model (TSM) RFC 5591 [RFC5591] in combination with a secure transport
   such as SSH RFC 5592 [RFC5592] or TLS/DTLS RFC 6353 [RFC6353].

   Further, deployment of SNMP versions prior to SNMPv3 is not
   recommended.  Instead, it is RECOMMENDED to deploy SNMPv3 and to
   enable cryptographic security.  It is then a customer/operator
   responsibility to ensure that the SNMP entity giving access to an
   instance of this MIB module is properly configured to give access to
   the objects only to those principals (users) that have legitimate
   rights to indeed GET or SET (change/create/delete) them.

10.  IANA Considerations

   IANA is requested to assign an OID for the MIB module from the "MIB
   Transmission Group - MPLS STD" sub-registry of the "Internet-standard
   MIB - Transmission Group" registry for the MPLS Linear Protection MIB
   module specified in this document.

11.  Contributing Authors

   Vishwas Manral
   Nano Sec
   599 Fairchild Drive
   Mountain View, CA
   USA

   EMail: vishwas@nanosec.io

12.  Acknowledgments

   The authors wish to thank Joan Cucchiara for her review as MIB
   Doctor.  Joan's detailed comments were of great help for improving
   the quality of this document.

   The authors would also like to thank Loa Andersson and Adrian Farrel
   for their valuable comments and suggestion on this document.

13.  References

13.1.  Normative References

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119,
              DOI 10.17487/RFC2119, March 1997,
              <http://www.rfc-editor.org/info/rfc2119>.





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   [RFC2578]  McCloghrie, K., Ed., Perkins, D., Ed., and J.
              Schoenwaelder, Ed., "Structure of Management Information
              Version 2 (SMIv2)", STD 58, RFC 2578,
              DOI 10.17487/RFC2578, April 1999,
              <http://www.rfc-editor.org/info/rfc2578>.

   [RFC2579]  McCloghrie, K., Ed., Perkins, D., Ed., and J.
              Schoenwaelder, Ed., "Textual Conventions for SMIv2",
              STD 58, RFC 2579, DOI 10.17487/RFC2579, April 1999,
              <http://www.rfc-editor.org/info/rfc2579>.

   [RFC2580]  McCloghrie, K., Ed., Perkins, D., Ed., and J.
              Schoenwaelder, Ed., "Conformance Statements for SMIv2",
              STD 58, RFC 2580, DOI 10.17487/RFC2580, April 1999,
              <http://www.rfc-editor.org/info/rfc2580>.

   [RFC3289]  Baker, F., Chan, K., and A. Smith, "Management Information
              Base for the Differentiated Services Architecture",
              RFC 3289, DOI 10.17487/RFC3289, May 2002,
              <http://www.rfc-editor.org/info/rfc3289>.

   [RFC3411]  Harrington, D., Presuhn, R., and B. Wijnen, "An
              Architecture for Describing Simple Network Management
              Protocol (SNMP) Management Frameworks", STD 62, RFC 3411,
              DOI 10.17487/RFC3411, December 2002,
              <http://www.rfc-editor.org/info/rfc3411>.

   [RFC3414]  Blumenthal, U. and B. Wijnen, "User-based Security Model
              (USM) for version 3 of the Simple Network Management
              Protocol (SNMPv3)", STD 62, RFC 3414,
              DOI 10.17487/RFC3414, December 2002,
              <http://www.rfc-editor.org/info/rfc3414>.

   [RFC3811]  Nadeau, T., Ed. and J. Cucchiara, Ed., "Definitions of
              Textual Conventions (TCs) for Multiprotocol Label
              Switching (MPLS) Management", RFC 3811,
              DOI 10.17487/RFC3811, June 2004,
              <http://www.rfc-editor.org/info/rfc3811>.

   [RFC3826]  Blumenthal, U., Maino, F., and K. McCloghrie, "The
              Advanced Encryption Standard (AES) Cipher Algorithm in the
              SNMP User-based Security Model", RFC 3826,
              DOI 10.17487/RFC3826, June 2004,
              <http://www.rfc-editor.org/info/rfc3826>.







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   [RFC5591]  Harrington, D. and W. Hardaker, "Transport Security Model
              for the Simple Network Management Protocol (SNMP)",
              STD 78, RFC 5591, DOI 10.17487/RFC5591, June 2009,
              <http://www.rfc-editor.org/info/rfc5591>.

   [RFC5592]  Harrington, D., Salowey, J., and W. Hardaker, "Secure
              Shell Transport Model for the Simple Network Management
              Protocol (SNMP)", RFC 5592, DOI 10.17487/RFC5592, June
              2009, <http://www.rfc-editor.org/info/rfc5592>.

   [RFC6353]  Hardaker, W., "Transport Layer Security (TLS) Transport
              Model for the Simple Network Management Protocol (SNMP)",
              STD 78, RFC 6353, DOI 10.17487/RFC6353, July 2011,
              <http://www.rfc-editor.org/info/rfc6353>.

   [RFC6378]  Weingarten, Y., Ed., Bryant, S., Osborne, E., Sprecher,
              N., and A. Fulignoli, Ed., "MPLS Transport Profile (MPLS-
              TP) Linear Protection", RFC 6378, DOI 10.17487/RFC6378,
              October 2011, <http://www.rfc-editor.org/info/rfc6378>.

   [RFC7271]  Ryoo, J., Ed., Gray, E., Ed., van Helvoort, H.,
              D'Alessandro, A., Cheung, T., and E. Osborne, "MPLS
              Transport Profile (MPLS-TP) Linear Protection to Match the
              Operational Expectations of Synchronous Digital Hierarchy,
              Optical Transport Network, and Ethernet Transport Network
              Operators", RFC 7271, DOI 10.17487/RFC7271, June 2014,
              <http://www.rfc-editor.org/info/rfc7271>.

   [RFC7697]  Pan, P., Aldrin, S., Venkatesan, M., Sampath, K., Nadeau,
              T., and S. Boutros, "MPLS Transport Profile (MPLS-TP)
              Operations, Administration, and Maintenance (OAM)
              Identifiers Management Information Base (MIB)", RFC 7697,
              DOI 10.17487/RFC7697, January 2016,
              <http://www.rfc-editor.org/info/rfc7697>.

13.2.  Informative References

   [RFC3410]  Case, J., Mundy, R., Partain, D., and B. Stewart,
              "Introduction and Applicability Statements for Internet-
              Standard Management Framework", RFC 3410,
              DOI 10.17487/RFC3410, December 2002,
              <http://www.rfc-editor.org/info/rfc3410>.

   [RFC3812]  Srinivasan, C., Viswanathan, A., and T. Nadeau,
              "Multiprotocol Label Switching (MPLS) Traffic Engineering
              (TE) Management Information Base (MIB)", RFC 3812,
              DOI 10.17487/RFC3812, June 2004,
              <http://www.rfc-editor.org/info/rfc3812>.



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   [G8121]    International Telecommunication Union, "Characteristics of
              MPLS-TP equipment functional blocks", ITU-T Recommendation
              G.8121/Y.1381, April 2016.

   [G8151]    International Telecommunication Union, "Management aspects
              of the MPLS-TP network element", ITU-T Recommendation
              G.8151/Y.1374, January 2015.

Authors' Addresses

   Kingston Smiler Selvaraj
   IpInfusion
   RMZ Centennial
   Mahadevapura Post
   Bangalore - 560048
   India

   EMail: kingstonsmiler@gmail.com


   Venkatesan Mahalingam
   Dell Inc.
   5450 Great America Parkway
   Santa Clara,  CA 95054
   USA

   EMail: venkat.mahalingams@gmail.com


   Daniel King
   Old Dog Consulting
   UK

   EMail: daniel@olddog.co.uk


   Sam Aldrin
   Google, Inc.
   1600 Amphitheatre Parkway
   Mountain View, CA
   USA

   EMail: aldrin.ietf@gmail.com








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   Jeong-dong Ryoo
   ETRI
   218 Gajeong-ro
   Yuseong-gu, Daejeon 34129
   South Korea

   EMail: ryoo@etri.re.kr












































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