Definition of Managed Objects for the IPv6 Routing Protocol for Low Power and Lossy Networks (RPL)
draft-sehgal-roll-rpl-mib-02

Internet Engineering Task Force                                 K. Korte
Internet-Draft                                          J. Schoenwaelder
Intended status: Standards Track                               A. Sehgal
Expires: May 3, 2012                                   Jacobs University
                                                                 T. Tsou
                                                                 C. Zhou
                                                     Huawei Technologies
                                                        October 31, 2011

  Definition of Managed Objects for the IPv6 Routing Protocol for Low
                     Power and Lossy Networks (RPL)
                      draft-sehgal-roll-rpl-mib-02

Abstract

   This memo defines a portion of the Management Information Base (MIB)
   for use with network management protocols in the Internet community.
   In particular, it defines objects for managing the IPv6 Routing
   Protocol for Low Power and Lossy Networks (RPL).

Status of This Memo

   This Internet-Draft is submitted to IETF 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 May 3, 2012.

Copyright Notice

   Copyright (c) 2011 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 BSD License.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  The Internet-Standard Management Framework . . . . . . . . . .  3
   3.  Conventions  . . . . . . . . . . . . . . . . . . . . . . . . .  3
   4.  Overview . . . . . . . . . . . . . . . . . . . . . . . . . . .  3
   5.  Relationship to Other MIB Modules  . . . . . . . . . . . . . .  5
   6.  Definitions  . . . . . . . . . . . . . . . . . . . . . . . . .  5
   7.  Security Considerations  . . . . . . . . . . . . . . . . . . . 23
   8.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 23
   9.  References . . . . . . . . . . . . . . . . . . . . . . . . . . 24
     9.1.  Normative References . . . . . . . . . . . . . . . . . . . 24
     9.2.  Informative References . . . . . . . . . . . . . . . . . . 24
   Appendix A.  Open Issues . . . . . . . . . . . . . . . . . . . . . 25

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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 the IPv6 Routing Protocol for Low Power and
   Lossy Networks (RPL) [I-D.ietf-roll-rpl].

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 Management Information Base or MIB.  MIB objects are generally
   accessed through the Simple Network Management Protocol (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 RFC 2119 [RFC2119].

4.  Overview

   The MIB module is organized into a group of scalars and tables.

rplMib(1.3.6.1.2.1.8888)
|
+-rplNotifications(0)
|
+-rplObjects(1)
  |
  +-rplGeneral(1)
  |  |
  |  +- rwn RplDISMode rplDefaultDISMode(1)
  |
  +-rplActive(2)
  |  |
  |  +- rwn RplInstanceID   rplActiveInstance(1)
  |  +- rwn InetAddressIPv6 rplActiveDodag(2)
  |  +- r-n Unsigned32      rplActiveDodagDAOSequence(3)
  |  +- rwn Unsigned32      rplActiveDodagTriggerSequence(4)

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  |
  +-rplOCPTable(3)
  |  |
  |  +-rplOCPEntry(1) [rplOCPCodepoint]
  |     |
  |     +- --- RplObjectiveCodePoint rplOCPCodepoint(1)
  |     +- rwn TruthValue            rplOCPEnabled(2)
  |
  +-rplRPLInstanceTable(4)
  |  |
  |  +-rplRPLInstanceEntry(1) [rplRPLInstanceID]
  |     |
  |     +- --- RplInstanceID         rplRPLInstanceID(1)
  |     +- rwn RplObjectiveCodePoint rplRPLInstanceOCP(2)
  |     +- rwn RplDISMode            rplRPLInstanceDisMode(3)
  |     +- rwn Enumeration           rplRPLInstanceDAOAcknowledgement(4)
  |     +- rwn RplModeOfOperation    rplRPLInstanceModeOfOperation(5)
  |
  +-rplDodagTable(5)
  |  |
  |  +-rplDodagEntry(1) [rplRPLInstanceID,rplDodagRoot]
  |     |
  |     +- --- InetAddressIPv6       rplDodagRoot(1)
  |     +- r-n RplDodagVersionNumber rplDodagVersion(2)
  |     +- r-n RplRank               rplDodagRank(3)
  |     +- r-n Enumeration           rplDodagState(4)
  |     +- r-n RplDAODelay           rplDodagDAODelay(5)
  |     +- r-n RplDodagPreference    rplDodagPreference(6)
  |     +- r-n RplMinHopRankIncrease rplDodagMinHopRankIncrease(7)
  |     +- r-n Unsigned32            rplDodagMaxRankIncrease(8)
  |     +- r-n Unsigned32            rplDodagIntervalDoublings(9)
  |     +- r-n Unsigned32            rplDodagIntervalMin(10)
  |     +- r-n Unsigned32            rplDodagRedundancyConstant(11)
  |     +- r-n RplPathControlSize    rplDodagPathControlSize(12)
  |
  +-rplDodagParentTable(6)
  |  |
  |  +-rplDodagParentEntry(1) [rplRPLInstanceID,rplDodagRoot,
  |     |                      rplDodagParentID]
  |     |
  |     +- --- InetAddressIPv6 rplDodagParentID(1)
  |     +- r-n InterfaceIndex  rplDodagParentIf(2)
  |
  +-rplDodagChildTable(7)
  |  |
  |  +-rplDodagChildEntry(1) [rplRPLInstanceID,rplDodagRoot,
  |     |                      rplDodagChildID]
  |     |

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  |     +- r-n InetAddressIPv6 rplDodagChildID(1)
  |
  +-rplDodagPrefixTable(8)
  |  |
  |  +-rplDodagPrefixEntry(1) [rplRPLInstanceID,rplDodagRoot,
  |     |                      rplDodagPrefixIpv6Prefix,
  |     |                      rplDodagPrefixIpv6PrefixLength]
  |     |
  |     +- r-n InetAddressIPv6         rplDodagPrefixIpv6Prefix(1)
  |     +- r-n InetAddressPrefixLength rplDodagPrefixIpv6PrefixLength(2)
  |
  +-rplStats(9)
     |
     +- r-n Counter32 rplStatsMemOverflows(1)
     +- r-n Counter32 rplStatsValidParentFailures(2)
     +- r-n Counter32 rplStatsNoInstanceIDs(3)
     +- r-n Counter32 rplStatsTriggeredLocalRepairs(4)
     +- r-n Counter32 rplStatsTriggeredGlobalRepairs(5)
     +- r-n Counter32 rplStatsParseErrors(6)
     +- r-n Counter32 rplStatsNoParentSecs(7)
     +- r-n Counter32 rplStatsActiveNoParentSecs(8)
     +- r-n Counter32 rplStatsOBitSetDownwards(9)
     +- r-n Counter32 rplStatsOBitClearedUpwards(10)
     +- r-n Counter32 rplStatsFBitSet(11)
     +- r-n Counter32 rplStatsRBitSet(12)

5.  Relationship to Other MIB Modules

   The MIB module IMPORTS definitions from SNMPv2-SMI [RFC2578],
   SNMPv2-TC [RFC2579], SNMPv2-CONF [RFC2580], IF-MIB [RFC2863] and the
   INET-ADDRESS-MIB [RFC4001].

6.  Definitions

  RPL-MIB DEFINITIONS ::= BEGIN

  IMPORTS
      MODULE-IDENTITY, OBJECT-TYPE, Unsigned32, Counter32, mib-2
          FROM SNMPv2-SMI                                 -- RFC 2578
      TEXTUAL-CONVENTION, TruthValue
          FROM SNMPv2-TC                                  -- RFC 2579
      OBJECT-GROUP, MODULE-COMPLIANCE
          FROM SNMPv2-CONF                                -- RFC 2580
      InterfaceIndex
          FROM IF-MIB                                     -- RFC 2863
      InetAddressIPv6, InetAddressPrefixLength
          FROM INET-ADDRESS-MIB;                          -- RFC 4001
      -- XXX Are we sure RPL will never ever support a different

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      -- XXX version of IP?

  rplMib MODULE-IDENTITY
      LAST-UPDATED "201110310000Z"
      ORGANIZATION
          "Jacobs University Bremen"
      CONTACT-INFO
          "Kevin Dominik Korte
           Jacobs University Bremen
           Email: k.korte@jacobs-university.de

           Anuj Sehgal
           Jacobs University Bremen
           Email: s.anuj@jacobs-university.de

           Juergen Schoenwaelder
           Jacobs University Bremen
           Email: j.schoenwaelder@jacobs-university.de

           Tina Tsou
           Huawei Technologies
           Email: tena@huawei.com

           Cathy Zhou
           Huawei Technologies
           Email: cathyzhou@huawei.com"
      DESCRIPTION
          "The MIB module for monitoring nodes implementing the IPv6
           routing protocol for low power and lossy networks (RPL).

           Copyright (c) 2011 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 "201110310000Z"
      DESCRIPTION
          "Initial version, published as RFC XXXX."
      -- RFC Ed.: replace XXXX with actual RFC number & remove this note

      ::= { mib-2 XXXX }

  RplInstanceID ::=  TEXTUAL-CONVENTION

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      DISPLAY-HINT "d"
      STATUS       current
      DESCRIPTION
          "A global or local RPLinstanceID as defined in Section 5.1. of
           RFC YYYY."
      REFERENCE
          "RFC YYYY: RPL: IPv6 Routing Protocol for LLNs"
      SYNTAX       Unsigned32 (0..255)

  RplDodagVersionNumber ::= TEXTUAL-CONVENTION
      DISPLAY-HINT "d"
      STATUS      current
      DESCRIPTION
          "The version number of a DODAG as defined in Section 6.3 of
           RFC YYYY."
      REFERENCE
          "RFC YYYY: RPL: IPv6 Routing Protocol for LLNs"
      SYNTAX      Unsigned32 (0..255)

  RplRank ::= TEXTUAL-CONVENTION
      DISPLAY-HINT "d"
      STATUS      current
      DESCRIPTION
          "The rank of a node within a DODAG as defined in Section 6.3
           of RFC YYYY."
      REFERENCE
          "RFC YYYY: RPL: IPv6 Routing Protocol for LLNs"
      SYNTAX      Unsigned32 (0..65535)

  RplObjectiveCodePoint ::= TEXTUAL-CONVENTION
      DISPLAY-HINT "d"
      STATUS      current
      DESCRIPTION
          "The Objective Code Point of a DODAG as defined in
           Section 6.7.6 of RFC YYYY."
      REFERENCE
          "RFC YYYY: RPL: IPv6 Routing Protocol for LLNs"
      SYNTAX      Unsigned32 (0..65535)

  RplDISMode ::= TEXTUAL-CONVENTION
      STATUS      current
      DESCRIPTION
          "Determines whether a DIS message is send upon boot-up
           or not as defined in Section 17.2.1.1 of RFC YYYY:

           silent(1)  do not send DIS messages
           send(2)    send DIS messages"
      REFERENCE

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          "RFC YYYY: RPL: IPv6 Routing Protocol for LLNs"
      SYNTAX      INTEGER {
                      silent(1),
                      send(2)
                  }

  RplModeOfOperation ::= TEXTUAL-CONVENTION
      STATUS      current
      DESCRIPTION
          "Determines the mode of operation."
      REFERENCE
          "RFC YYYY: RPL: IPv6 Routing Protocol for LLNs"
      SYNTAX      INTEGER {
                      noDownwardRoutes(0),
                      nonStoringMode(1),
                      storingWithoutMulticastSupport(2),
                      storingWithMulticastSupport(3)
                  }

  RplDAODelay ::= TEXTUAL-CONVENTION
      DISPLAY-HINT "d"
      STATUS      current
      DESCRIPTION
          "The delay time used for aggregation before a DAO message
           is send."
      REFERENCE
          "RFC YYYY: RPL: IPv6 Routing Protocol for LLNs"
      SYNTAX      Unsigned32

  RplDodagPreference ::= TEXTUAL-CONVENTION
      DISPLAY-HINT "d"
      STATUS      current
      DESCRIPTION
          "The preference of a DODAG compared to another DODAG of the
           same instance as defined in Section 6.3 of RFC YYYY."
      REFERENCE
          "RFC YYYY: RPL: IPv6 Routing Protocol for LLNs"
      SYNTAX      Unsigned32 (0..7)

  RplMinHopRankIncrease ::= TEXTUAL-CONVENTION
      DISPLAY-HINT "d"
      STATUS      current
      DESCRIPTION
          "The minimal incerease of a rank within a single hop as
           defined in Section 6.7.6 of RFC YYYY."
      REFERENCE
          "RFC YYYY: RPL: IPv6 Routing Protocol for LLNs"
      SYNTAX      Unsigned32 (0..131071)

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  RplPathControlSize ::= TEXTUAL-CONVENTION
      DISPLAY-HINT "d"
      STATUS      current
      DESCRIPTION
          "The Path Control Size within a DODAG as defined in
           Section 6.7.6 of RFC YYYY."
      REFERENCE
          "RFC YYYY: RPL: IPv6 Routing Protocol for LLNs"
      SYNTAX      Unsigned32 (0..7)

  -- object definitions

  rplNotifications OBJECT IDENTIFIER ::= { rplMib 0 }
  rplObjects       OBJECT IDENTIFIER ::= { rplMib 1 }
  rplConformance   OBJECT IDENTIFIER ::= { rplMib 2 }

  rplGeneral OBJECT IDENTIFIER ::= { rplObjects 1 }

  rplDefaultDISMode OBJECT-TYPE
      SYNTAX      RplDISMode
      MAX-ACCESS  read-write
      STATUS      current
      DESCRIPTION
          "Determines whether a DIS message is send upon boot-up."
      ::= { rplGeneral 1 }
      -- XXX should be able to configure the number of DIS messages
      -- XXX and related timer, see 17.2.1.1.
      -- XXX need to say something about persistence across reboots

      -- XXX Should there be more objects to configure default timers
      -- XXX etc that are applied to all DODAGs etc?

  rplActive OBJECT IDENTIFIER ::= { rplObjects 2 }

  rplActiveInstance OBJECT-TYPE
      SYNTAX       RplInstanceID
      MAX-ACCESS   read-write
      STATUS       current
      DESCRIPTION
          "The currently active RPL Instance."
      ::= { rplActive 1 }
      -- XXX need to say something about persistence across reboots

  rplActiveDodag OBJECT-TYPE
      SYNTAX      InetAddressIPv6
      MAX-ACCESS  read-write
      STATUS      current
      DESCRIPTION

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          "The currently active RPL DODAG in the active RPL Instance."
      ::= { rplActive 2 }

  rplActiveDodagDAOSequence OBJECT-TYPE
      SYNTAX      Unsigned32 (0..255)
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
          "The DAO message sequence number (DAOSequence) of the active
           DODAG as defined in Section 6.5.1 of RFC YYYY."
      REFERENCE
          "RFC YYYY: RPL: IPv6 Routing Protocol for LLNs"
      ::= { rplActive 3 }

  rplActiveDodagTriggerSequence OBJECT-TYPE
      SYNTAX      Unsigned32 (0..255)
      MAX-ACCESS  read-write
      STATUS      current
      DESCRIPTION
          "The DAO Trigger Sequence Number (DTSN) of the active
           DODAG as defined in Section 6.3.1 of RFC YYYY."
      REFERENCE
          "RFC YYYY: RPL: IPv6 Routing Protocol for LLNs"
      ::= { rplActive 4 }

  rplOCPTable OBJECT-TYPE
      SYNTAX      SEQUENCE OF RplOCPEntry
      MAX-ACCESS  not-accessible
      STATUS      current
      DESCRIPTION
          "The table of all supported Objective Code Points (OCPs)."
      ::= { rplObjects 3 }

  rplOCPEntry OBJECT-TYPE
      SYNTAX      RplOCPEntry
      MAX-ACCESS  not-accessible
      STATUS      current
      DESCRIPTION
          "An entry representing a supported Objective Code Point."
      INDEX { rplOCPCodepoint }
      ::= { rplOCPTable 1 }

  RplOCPEntry ::= SEQUENCE {
      rplOCPCodepoint  RplObjectiveCodePoint,
      rplOCPEnabled    TruthValue
  }

  rplOCPCodepoint OBJECT-TYPE

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      SYNTAX      RplObjectiveCodePoint
      MAX-ACCESS  not-accessible
      STATUS      current
      DESCRIPTION
          "A supported Objective Code Point."
      ::= { rplOCPEntry 1 }

  rplOCPEnabled OBJECT-TYPE
      SYNTAX      TruthValue
      MAX-ACCESS  read-write
      STATUS      current
      DESCRIPTION
          "Enables the usage of this Objective Code Point."
      ::= { rplOCPEntry 2 }
      -- XXX need to say something about persistence across reboots

  rplRPLInstanceTable OBJECT-TYPE
      SYNTAX      SEQUENCE OF RplRPLInstanceEntry
      MAX-ACCESS  not-accessible
      STATUS      current
      DESCRIPTION
          "The table represents information about all known
           RPL Instances."
      ::= { rplObjects 4 }

  rplRPLInstanceEntry OBJECT-TYPE
      SYNTAX      RplRPLInstanceEntry
      MAX-ACCESS  not-accessible
      STATUS      current
      DESCRIPTION
          "An entry representing information about a RPL Instance."
      INDEX { rplRPLInstanceID }
      ::= { rplRPLInstanceTable 1 }
      -- XXX This should likely be a read-create table.

  RplRPLInstanceEntry ::= SEQUENCE {
      rplRPLInstanceID                 RplInstanceID,
      rplRPLInstanceOCP                RplObjectiveCodePoint,
      rplRPLInstanceDisMode            RplDISMode,
      rplRPLInstanceDAOAcknowledgement INTEGER,
      rplRPLInstanceModeOfOperation    RplModeOfOperation
  }

  rplRPLInstanceID OBJECT-TYPE
      SYNTAX      RplInstanceID
      MAX-ACCESS  not-accessible
      STATUS      current
      DESCRIPTION

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          "The InstanceID of this RPL Instance."
      ::= { rplRPLInstanceEntry 1 }

  rplRPLInstanceOCP OBJECT-TYPE
      SYNTAX      RplObjectiveCodePoint
      MAX-ACCESS  read-write
      STATUS      current
      DESCRIPTION
          "The Objective Code Point of this RPL Instance."
      ::= { rplRPLInstanceEntry 2 }
      -- XXX If this is read-write, what is the persistence?
      -- XXX Support provisioning of table entries on border routers?
      -- XXX If so, use StorageType and RowStatus?

  rplRPLInstanceDisMode OBJECT-TYPE
      SYNTAX      RplDISMode
      MAX-ACCESS  read-write
      STATUS      current
      DESCRIPTION
          "Determines whether a DIS message is send for this instance
           upon boot-up."
      ::= { rplRPLInstanceEntry 3 }
      -- XXX Check how this works together with the global toggle.
      -- XXX should we allow per instance parameters such as the number
      -- XXX of DIS messages and related timer, see 17.2.1.1?

  rplRPLInstanceDAOAcknowledgement OBJECT-TYPE
      SYNTAX      INTEGER {
                    nope(1)
                  }
      MAX-ACCESS  read-write
      STATUS      current
      DESCRIPTION
          "The mode of Operation of the RPL instance."
      ::= { rplRPLInstanceEntry 4 }
      -- XXX What is this? Kevin?
      -- XXX persistence?

  rplRPLInstanceModeOfOperation OBJECT-TYPE
      SYNTAX      RplModeOfOperation
      MAX-ACCESS  read-write
      STATUS      current
      DESCRIPTION
          "The mode of Operation of the RPL instance."
      ::= { rplRPLInstanceEntry 5 }
      -- XXX persistence?

  rplDodagTable OBJECT-TYPE

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      SYNTAX      SEQUENCE OF RplDodagEntry
      MAX-ACCESS  not-accessible
      STATUS      current
      DESCRIPTION
          "The table represents information about all locally known
           DODAGs."
      ::= { rplObjects 5 }
      -- XXX The root needs a bit(?) config, where does that go?

  rplDodagEntry OBJECT-TYPE
      SYNTAX      RplDodagEntry
      MAX-ACCESS  not-accessible
      STATUS      current
      DESCRIPTION
          "An entry representing information about a DODAG."
      INDEX { rplRPLInstanceID, rplDodagRoot }
      ::= { rplDodagTable 1 }

  RplDodagEntry ::= SEQUENCE {
      rplDodagRoot                InetAddressIPv6,
      rplDodagVersion             RplDodagVersionNumber,
      rplDodagRank                RplRank,
      rplDodagState               INTEGER,
      rplDodagDAODelay            RplDAODelay,
      rplDodagPreference          RplDodagPreference,
      rplDodagMinHopRankIncrease  RplMinHopRankIncrease,
      rplDodagMaxRankIncrease     Unsigned32,
      rplDodagIntervalDoublings   Unsigned32,
      rplDodagIntervalMin         Unsigned32,
      rplDodagRedundancyConstant  Unsigned32,
      rplDodagPathControlSize     RplPathControlSize
  }

  rplDodagRoot OBJECT-TYPE
      SYNTAX      InetAddressIPv6
      MAX-ACCESS  not-accessible
      STATUS      current
      DESCRIPTION
          "The identifier of a DODAG root (DODAGID) of this RPL
           instance. The root of the DODAG reports its own IPv6
           address as the DODAG root."
      ::= { rplDodagEntry 1 }

  rplDodagVersion OBJECT-TYPE
      SYNTAX      RplDodagVersionNumber
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION

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          "The version of the DODAG in this RPL instance."
      ::= { rplDodagEntry 2 }

  rplDodagRank OBJECT-TYPE
      SYNTAX      RplRank
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
          "The rank of the node within the DODAG."
      ::= { rplDodagEntry 3 }

  rplDodagState OBJECT-TYPE
      SYNTAX      INTEGER {
                      other(0),
                      associated(1),
                      grounded(2),
                      floating(3)
                  }
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
          "The status of the DODAG:

           other(0)      An unknown state.

           associated(1) A node is associated with the RPL instance.

           grounded(2)   The DODAG is grounded.

           floating(3)   The DODAG is floating (not grounded).
           "
      ::= { rplDodagEntry 4 }

  rplDodagDAODelay OBJECT-TYPE
      SYNTAX      RplDAODelay
      UNITS       "milliseconds"
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
          "The delay for aggregations before a DAO is send."
      ::= { rplDodagEntry 5 }
      -- XXX should this be configuration? If so we should add a default
      -- clause to define the default value to be 1 second.

  rplDodagPreference OBJECT-TYPE
      SYNTAX      RplDodagPreference
      MAX-ACCESS  read-only
      STATUS      current

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      DESCRIPTION
          "How preferred this DODAG is compared to other DODAGs
           within the same instance."
      ::= { rplDodagEntry 6 }

  rplDodagMinHopRankIncrease OBJECT-TYPE
      SYNTAX      RplMinHopRankIncrease
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
          "The minimum increase of the rank in a single hop."
      ::= { rplDodagEntry 7 }
      -- XXX should this be writable at the root? If so we should add a
      -- defval clause to define the default value to be 256.

  rplDodagMaxRankIncrease OBJECT-TYPE
      SYNTAX      Unsigned32 (0..65535)
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
           "The maximum allowable increase in rank in support of local
            repair.  If DAGMaxRankIncrease is 0 then this mechanism is
            disabled."
      ::= { rplDodagEntry 8 }

  rplDodagIntervalDoublings OBJECT-TYPE
      SYNTAX      Unsigned32 (0..255)
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
          "The configured Imax of the DIO trickle timer."
      ::= { rplDodagEntry 9 }
      -- XXX should this be writable at the root? If so we should add a
      -- defval clause to define the default value of 20.

  rplDodagIntervalMin OBJECT-TYPE
      SYNTAX      Unsigned32 (0..255)
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
          "The configured Imin of the DIO trickle timer."
      ::= { rplDodagEntry 10 }
      -- XXX should this be writable at the root? If so we should add a
      -- defval clause to define the default value of 3.

  rplDodagRedundancyConstant OBJECT-TYPE
      SYNTAX      Unsigned32 (0..255)
      MAX-ACCESS  read-only

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      STATUS      current
      DESCRIPTION
          "The configured k of the DIO trickle timer."
      ::= { rplDodagEntry 11 }
      -- XXX should this be writable at the root? If so we should add a
      -- defval clause to define the default value of 10.

  rplDodagPathControlSize OBJECT-TYPE
      SYNTAX      RplPathControlSize
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
          "The Path Control Size of this DODAG."
      ::= { rplDodagEntry 12 }

  rplDodagParentTable OBJECT-TYPE
      SYNTAX      SEQUENCE OF RplDodagParentEntry
      MAX-ACCESS  not-accessible
      STATUS      current
      DESCRIPTION
          "The list of parents for a DODAG."
      ::= { rplObjects 6 }

  rplDodagParentEntry OBJECT-TYPE
      SYNTAX      RplDodagParentEntry
      MAX-ACCESS  not-accessible
      STATUS      current
      DESCRIPTION
          "Information about a known DODAG parent."
      INDEX { rplRPLInstanceID, rplDodagRoot, rplDodagParentID }
      ::= { rplDodagParentTable 1 }

  RplDodagParentEntry ::= SEQUENCE {
      rplDodagParentID     InetAddressIPv6,
      rplDodagParentIf     InterfaceIndex
  }

  rplDodagParentID OBJECT-TYPE
      SYNTAX      InetAddressIPv6
      MAX-ACCESS  not-accessible
      STATUS      current
      DESCRIPTION
          "An RPL parent associated with this DODAG."
      ::= { rplDodagParentEntry 1 }

  rplDodagParentIf OBJECT-TYPE
      SYNTAX      InterfaceIndex
      MAX-ACCESS  read-only

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      STATUS      current
      DESCRIPTION
          "The interface over which the parent can be reached."
      ::= { rplDodagParentEntry 2 }

  rplDodagChildTable OBJECT-TYPE
      SYNTAX      SEQUENCE OF RplDodagChildEntry
      MAX-ACCESS  not-accessible
      STATUS      current
      DESCRIPTION
          "The list of children for a DODAG."
      ::= { rplObjects 7 }

  rplDodagChildEntry OBJECT-TYPE
      SYNTAX      RplDodagChildEntry
      MAX-ACCESS  not-accessible
      STATUS      current
      DESCRIPTION
          "Information about a known DODAG child."
      INDEX { rplRPLInstanceID, rplDodagRoot, rplDodagChildID }
      ::= { rplDodagChildTable 1 }

  RplDodagChildEntry ::= SEQUENCE {
      rplDodagChildID InetAddressIPv6
  }

  rplDodagChildID OBJECT-TYPE
      SYNTAX      InetAddressIPv6
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
          "An RPL child associated with this DODAG."
      ::= { rplDodagChildEntry 1 }

  rplDodagPrefixTable OBJECT-TYPE
      SYNTAX      SEQUENCE OF RplDodagPrefixEntry
      MAX-ACCESS  not-accessible
      STATUS      current
      DESCRIPTION
          "List of prefixes associated with a DODAG."
      ::= { rplObjects 8 }
      -- XXX Explain how this relates to the ipAddressPrefixTable in
      -- XXX the IP-MIB

  rplDodagPrefixEntry OBJECT-TYPE
      SYNTAX      RplDodagPrefixEntry
      MAX-ACCESS  not-accessible
      STATUS      current

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      DESCRIPTION
          "Information about a prefix associated with a DODAG."
      INDEX { rplRPLInstanceID, rplDodagRoot,
              rplDodagPrefixIpv6Prefix, rplDodagPrefixIpv6PrefixLength }
      ::= { rplDodagPrefixTable 1 }

  RplDodagPrefixEntry ::= SEQUENCE {
      rplDodagPrefixIpv6Prefix       InetAddressIPv6,
      rplDodagPrefixIpv6PrefixLength InetAddressPrefixLength
  }

  rplDodagPrefixIpv6Prefix OBJECT-TYPE
      SYNTAX      InetAddressIPv6
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
          "The IPv6 address forming the IPv6 prefix."
      ::= { rplDodagPrefixEntry 1 }

  rplDodagPrefixIpv6PrefixLength OBJECT-TYPE
      SYNTAX      InetAddressPrefixLength
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
          "The length of the IPv6 prefix."
      ::= { rplDodagPrefixEntry 2 }

  -- XXX The routing table should be exposed via the inetCidrRouteTable
  -- XXX defines in the IP-FORWARD-MIB (RFC 4292). We need to clarify
  -- XXX whether the inetCidrRoutePolicy can / should point to the DODAG
  -- XXX instance. Furthermore, this document should request that IANA
  -- XXX allocates a number for RPL in the IANAipRouteProtocol TC.

  rplStats OBJECT IDENTIFIER ::= { rplObjects 9 }

  rplStatsMemOverflows OBJECT-TYPE
      SYNTAX      Counter32
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
          "The number of memory allocation failures (e.g., routing table
           overflows)."
      ::= { rplStats 1 }

  rplStatsValidParentFailures OBJECT-TYPE
      SYNTAX      Counter32
      MAX-ACCESS  read-only
      STATUS      current

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      DESCRIPTION
          "The number of times a packet could not be sent to a DODAG
           parent flagged as valid."
      ::= { rplStats 2 }

  rplStatsNoInstanceIDs OBJECT-TYPE
      SYNTAX      Counter32
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
          "The number of times a packet could not be sent because of
           a missing RPLInstanceID."
      ::= { rplStats 3 }

  rplStatsTriggeredLocalRepairs OBJECT-TYPE
      SYNTAX      Counter32
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
          "The number of times a local repair procedure was triggered."
      ::= { rplStats 4 }

  rplStatsTriggeredGlobalRepairs OBJECT-TYPE
      SYNTAX      Counter32
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
          "The number of times a global repair procedure was triggered."
      ::= { rplStats 5 }

  rplStatsParseErrors OBJECT-TYPE
      SYNTAX      Counter32
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
          "The number of received malformed messages."
      ::= { rplStats 6 }

  rplStatsNoParentSecs OBJECT-TYPE
      SYNTAX      Counter32
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
          "The number of seconds without a next hop (DODAG parent)."
      ::= { rplStats 7 }

  rplStatsActiveNoParentSecs OBJECT-TYPE
      SYNTAX      Counter32

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      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
          "The number of seconds with packets to forward without a
           next hop (DODAG parent)."
      ::= { rplStats 8 }

  rplStatsOBitSetDownwards OBJECT-TYPE
      SYNTAX      Counter32
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
          "Number of packets received with the 'O' bit set from
           a node with a higher rank."
      ::= { rplStats 9 }

  rplStatsOBitClearedUpwards OBJECT-TYPE
      SYNTAX      Counter32
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
          "Number of packets received with the 'O' bit cleared
           from a node with a lower rank."
      ::= { rplStats 10 }

  rplStatsFBitSet OBJECT-TYPE
      SYNTAX      Counter32
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
          "Number of packets received with the 'F' bit set."
      ::= { rplStats 11 }

  rplStatsRBitSet OBJECT-TYPE
      SYNTAX      Counter32
      MAX-ACCESS  read-only
      STATUS      current
      DESCRIPTION
          "Number of packets received with the 'R' bit set."
      ::= { rplStats 12 }

  -- XXX There seem to be additional local error events to count, see
  -- XXX for example Section 11.2. (rank errors, forwarding errors, ...)

  -- XXX RPL security has not been looked at.

  rplGroups      OBJECT IDENTIFIER ::= { rplConformance 1 }
  rplCompliances OBJECT IDENTIFIER ::= { rplConformance 2 }

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  rplFullCompliance MODULE-COMPLIANCE
      STATUS      current
      DESCRIPTION
          "Compliance statement for implementations supporting
           read/write access, according to the object definitions."
      MODULE      -- this module
      MANDATORY-GROUPS {
          rplGeneralGroup,
          rplInstanceGroup,
          rplStatsGroup
      }
      ::= { rplCompliances 1 }

  rplReadOnlyCompliance MODULE-COMPLIANCE
      STATUS      current
      DESCRIPTION
          "Compliance statement for implementations supporting
           only readonly access."
      MODULE      -- this module
      MANDATORY-GROUPS {
          rplGeneralGroup,
          rplInstanceGroup,
          rplStatsGroup
      }
      ::= { rplCompliances 2 }
      -- XXX Need to list all writable objects to declare them
      -- XXX readonly.

  rplGeneralGroup OBJECT-GROUP
      OBJECTS {
          rplDefaultDISMode,
          rplActiveInstance,
          rplActiveDodag,
          rplActiveDodagDAOSequence,
          rplActiveDodagTriggerSequence,
          -- rplOCPCodepoint,
          rplOCPEnabled
      }
      STATUS      current
      DESCRIPTION
          "A collection of objects providing general information about
           the RPL implementation."
      ::= { rplGroups 1 }

  rplInstanceGroup OBJECT-GROUP
      OBJECTS {
          -- rplRPLInstanceID,
          rplRPLInstanceOCP,

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          rplRPLInstanceDisMode,
          rplRPLInstanceDAOAcknowledgement,
          rplRPLInstanceModeOfOperation,
          -- rplDodagRoot,
          rplDodagVersion,
          rplDodagRank,
          rplDodagState,
          rplDodagDAODelay,
          rplDodagPreference,
          rplDodagMinHopRankIncrease,
          rplDodagMaxRankIncrease,
          rplDodagIntervalDoublings,
          rplDodagIntervalMin,
          rplDodagRedundancyConstant,
          rplDodagPathControlSize,
          -- rplDodagParentID,
          rplDodagParentIf,
          rplDodagChildID,
          rplDodagPrefixIpv6Prefix,
          rplDodagPrefixIpv6PrefixLength
      }
      STATUS      current
      DESCRIPTION
          "A collection of objects providing insight into the RPL
           Instances and the DODAGs."
      ::= { rplGroups 2 }

  rplStatsGroup OBJECT-GROUP
      OBJECTS {
          rplStatsMemOverflows,
          rplStatsValidParentFailures,
          rplStatsNoInstanceIDs,
          rplStatsTriggeredLocalRepairs,
          rplStatsTriggeredGlobalRepairs,
          rplStatsParseErrors,
          rplStatsNoParentSecs,
          rplStatsActiveNoParentSecs,
          rplStatsOBitSetDownwards,
          rplStatsOBitClearedUpwards,
          rplStatsFBitSet,
          rplStatsRBitSet
      }
      STATUS      current
      DESCRIPTION
          "A collection of objects providing statistics about the
           RPL implementation."
      ::= { rplGroups 3 }

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  END

7.  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 network
   environments.  The support for SET operations 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:

   o  rplActiveInstance: [TBD] explain sensitivity

   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:

   [TODO: Need to describe vulnerabilities here.]

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

   It is RECOMMENDED that implementers consider the security features as
   provided by the SNMPv3 framework (see [RFC3410], section 8),
   including full support for the SNMPv3 cryptographic mechanisms (for
   authentication and privacy).

   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.

8.  IANA Considerations

   IANA is requested to assign a value for "XXX" under the 'mib-2'
   subtree and to record the assignment in the SMI Numbers registry.
   When the assignment has been made, the RFC Editor is asked to replace

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   "XXX" (here and in the MIB module) with the assigned value and to
   remove this note.

9.  References

9.1.  Normative References

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

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

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

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

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

   [RFC4001]            Daniele, M., Haberman, B., Routhier, S., and J.
                        Schoenwaelder, "Textual Conventions for Internet
                        Network Addresses", RFC 4001, February 2005.

   [I-D.ietf-roll-rpl]  Winter, T., Thubert, P., Brandt, A., Clausen,
                        T., Hui, J., Kelsey, R., Levis, P., Pister, K.,
                        Struik, R., and J. Vasseur, "RPL: IPv6 Routing
                        Protocol for Low power and Lossy Networks",
                        draft-ietf-roll-rpl-19 (work in progress),
                        March 2011.

9.2.  Informative References

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

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Appendix A.  Open Issues

      Should there be basic DIS/DIO/DAO/DAO-ACK message counters?

      Should we reveal the interal trickle variables?  Right now, we
      only allow to read the configured trickle parameters.

      Should we model objective functions, e.g. by introducing a table
      that includes things such as MinHopRankIncrease and
      MaxRankIncrease

      Should we report the mode (storing mode, non-storing mode)?

      Check the various issues marked with XXX in the RPL-MIB itself.

Authors' Addresses

   Kevin Korte
   Jacobs University
   Campus Ring 1
   Bremen  28759
   Germany

   EMail: k.korte@jacobs-university.de

   Juergen Schoenwaelder
   Jacobs University
   Campus Ring 1
   Bremen  28759
   Germany

   EMail: j.schoenwaelder@jacobs-university.de

   Anuj Sehgal
   Jacobs University
   Campus Ring 1
   Bremen  28759
   Germany

   EMail: s.anuj@jacobs-university.de

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   Tina Tsou
   Huawei Technologies
   Bantian, Longgang District
   Shenzhen  518129
   P.R. China

   EMail: tena@huawei.com

   Cathy Zhou
   Huawei Technologies
   Bantian, Longgang District
   Shenzhen  518129
   P.R. China

   EMail: cathyzhou@huawei.com

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