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Versions: (draft-haas-forces-mib) 00 01 02 03 04 05 06 07 08 09 10 RFC 5813

Forwarding and Control Element                                   R. Haas
Separation (forces)                                                  IBM
Internet-Draft                                        September 10, 2008
Intended status: Standards Track
Expires: March 14, 2009


                               ForCES MIB
                        draft-ietf-forces-mib-10

Status of this Memo

   By submitting this Internet-Draft, each author represents that any
   applicable patent or other IPR claims of which he or she is aware
   have been or will be disclosed, and any of which he or she becomes
   aware will be disclosed, in accordance with Section 6 of BCP 79.

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

   Internet-Drafts are draft documents valid for a maximum of six months
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   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 March 14, 2009.

Abstract

   This memo defines a Management Information Base (MIB) module for use
   with network management protocols in the Internet community.  In
   particular, it defines managed objects for the Forwarding and Control
   Element Separation (ForCES) Network Element (NE).










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Table of Contents

   1.  Requirements notation  . . . . . . . . . . . . . . . . . . . .  3
   2.  The Internet-Standard Management Framework . . . . . . . . . .  3
   3.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
   4.  ForCES MIB Overview  . . . . . . . . . . . . . . . . . . . . .  3
   5.  ForCES MIB Definition  . . . . . . . . . . . . . . . . . . . .  5
   6.  Associations kept in the MIB . . . . . . . . . . . . . . . . . 13
   7.  Support for multiple CEs and FEs . . . . . . . . . . . . . . . 13
   8.  Security Considerations  . . . . . . . . . . . . . . . . . . . 14
   9.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 14
   10. Changes from Previous Draft Revisions  . . . . . . . . . . . . 15
   11. References . . . . . . . . . . . . . . . . . . . . . . . . . . 18
     11.1.  Normative References  . . . . . . . . . . . . . . . . . . 18
     11.2.  Informative References  . . . . . . . . . . . . . . . . . 18
   Appendix A.  Acknowledgments . . . . . . . . . . . . . . . . . . . 19
   Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 19
   Intellectual Property and Copyright Statements . . . . . . . . . . 20

































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1.  Requirements notation

   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 [RFC2119].


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
   [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,
   [RFC2578], STD 58, [RFC2579] and STD 58, [RFC2580].


3.  Introduction

   The ForCES MIB module is a read-only MIB module that captures
   information related to the ForCES protocol ([RFC3654], [RFC3746],
   [forces-applicability-draft] and [forces-protocol-draft]).

   The ForCES MIB module does not include information that is specified
   in other MIB modules, such as packet counters for interfaces, etc.

   More specifically, the information in the ForCES MIB module relative
   to associations (between Control Elements and Forwarding Elements)
   that are in the UP state includes:

   o  identifiers of the elements in the association,

   o  configuration parameters of the association, and

   o  statistics of the association.


4.  ForCES MIB Overview

   The MIB module contains the latest ForCES protocol version supported
   by the Control Element (CE) (forcesLatestProtocolVersionSupported).
   Note that the CE must also allow interaction with Forwarding Elements
   (FEs) supporting earlier versions.



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   For each association identified by the pair CE ID and FE ID, the
   following associated information is provided by the MIB module as an
   entry (forcesAssociationEntry) in the association table
   (forcesAssociationTable):

   o  Version number of the ForCES protocol running in this association
      (forcesAssociationRunningProtocolVersion).

   o  Time when the association entered the UP state
      (forcesAssociationTimeUp).

   o  Time when the association left the UP state
      (forcesAssociationTimeDown).  Note that this is only used for
      notification purposes as the association is removed from the MIB
      immediately after it leaves the UP state.

   o  Number of ForCES Heartbeat messages sent from the CE
      (forcesAssociationHBMsgSent) and received by the CE
      (forcesAssociationHBMsgReceived) since the association entered the
      UP state.

   o  Number of operational ForCES messages sent from the CE
      (forcesAssociationOperMsgSent) and received by the CE
      (forcesAssociationOperMsgReceived) since the association entered
      the UP state.  Only messages other than Heartbeat, Association
      Setup, Association Setup Response, and Association Teardown are
      counted.

   Finally, the MIB module defines the following notifications:

   o  Whenever an association enters the UP state, a notification
      (forcesAssociationEntryUp) is issued containing the version of the
      ForCES protocol running.  CE ID and FE ID are concatenated to form
      the table index, hence they appear in the OID of the ForCES-
      protocol running-version object.  Optionally, a notification
      (forcesAssociationEntryUpStats) can instead be issued with all
      associated information for this association, except
      forcesAssociationTimeDown.

   o  Whenever an association leaves the UP state, a notification
      (forcesAssociationEntryDown) is issued containing the version of
      the ForCES protocol running.  Optionally, a notification
      (forcesAssociationEntryDownStats) can instead be issued with all
      associated information for this association.  The reason is that
      the association and all its associated information will be removed
      from the MIB immediately after this notification has been issued.





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5.  ForCES MIB Definition


      FORCES-MIB DEFINITIONS ::= BEGIN

      IMPORTS
          MODULE-IDENTITY, OBJECT-TYPE, NOTIFICATION-TYPE,
            mib-2, Integer32
            FROM SNMPv2-SMI

          TEXTUAL-CONVENTION, TimeStamp
            FROM SNMPv2-TC

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

          ZeroBasedCounter32
            FROM RMON2-MIB;

      forcesMib MODULE-IDENTITY
          LAST-UPDATED "200809101200Z"  -- Sep 10, 2008
          ORGANIZATION "IETF Forwarding and Control Element
                        Separation (ForCES) Working Group"
          CONTACT-INFO
              "WG Charter:
                http://www.ietf.org/html.charters/forces-charter.html

                Mailing lists:
                    General Discussion: forces@peach.ease.lsoft.com
                    To Subscribe: listserv@peach.ease.lsoft.com
                    In Body: subscribe forces

                Chairs: Patrick Droz
                        Email: dro@zurich.ibm.com
                        Jamal Hadi Salim
                        Email: hadi@znyx.com

                Editor: Robert Haas
                        IBM
                        Email:  rha@zurich.ibm.com"
          DESCRIPTION
              "This MIB module contains managed object definitions
               for the ForCES Protocol.
               Copyright (C) The Internet Trust (2008).  This
               version of this MIB module is part of RFC yyyy; see
               the RFC itself for full legal notices."
 -- RFC Ed.: replace yyyy with actual RFC number & remove this note



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          REVISION "200809101200Z"  -- Sep 10, 2008
          DESCRIPTION
            "Initial version, published as RFC yyyy."
 -- RFC Ed.: replace yyyy with actual RFC number & remove this note
          ::= { mib-2 XXX }
 -- RFC Ed.: replace XXX with IANA-assigned number & remove this note

 --****************************************************************

      forcesMibNotifications OBJECT IDENTIFIER ::= { forcesMib 0 }
      forcesMibObjects       OBJECT IDENTIFIER ::= { forcesMib 1 }
      forcesMibConformance   OBJECT IDENTIFIER ::= { forcesMib 2 }

      ForcesID ::= TEXTUAL-CONVENTION
          STATUS      current
          DESCRIPTION
              "The ForCES identifier is a four octet quantity."
          SYNTAX      OCTET STRING (SIZE (4))

      ForcesProtocolVersion ::= TEXTUAL-CONVENTION
          DISPLAY-HINT "d"
          STATUS      current
          DESCRIPTION
              "ForCES protocol version number.
               The version numbers used are defined in the
               specifications of the respective protocol:
               1 - ForCESv1 [RFCzzzz]."
 -- RFC Ed.: replace zzzz with actual RFC number of ForCES protocol
 -- & remove this note

          SYNTAX      Integer32 (1..255)

-- Notifications

      forcesAssociationEntryUp NOTIFICATION-TYPE
         OBJECTS     {
            forcesAssociationRunningProtocolVersion
         }
         STATUS      current
         DESCRIPTION
              "This notification is generated as soon
               as an association enters the UP state.
               Note that these notifications are not
               throttled as the CE itself should
               throttle the setup of associations."
         ::= { forcesMibNotifications 1 }





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       forcesAssociationEntryDown NOTIFICATION-TYPE
         OBJECTS     {
            forcesAssociationRunningProtocolVersion
         }
         STATUS      current
         DESCRIPTION
              "This notification is generated as soon
               as an association leaves the UP state.
               Note that these notifications are not
               throttled as the CE itself should
               throttle the setup of associations."
         ::= { forcesMibNotifications 2 }

      forcesAssociationEntryUpStats NOTIFICATION-TYPE
         OBJECTS     {
            forcesAssociationRunningProtocolVersion,
            forcesAssociationTimeUp
         }
         STATUS      current
         DESCRIPTION
              "This notification is generated as soon
               as an association enters the UP state.
               Note that these notifications are not
               throttled as the CE itself should
               throttle the setup of associations."
         ::= { forcesMibNotifications 3 }

       forcesAssociationEntryDownStats NOTIFICATION-TYPE
         OBJECTS     {
            forcesAssociationRunningProtocolVersion,
            forcesAssociationTimeUp,
            forcesAssociationTimeDown,
            forcesAssociationHBMsgSent,
            forcesAssociationHBMsgReceived,
            forcesAssociationOperMsgSent,
            forcesAssociationOperMsgReceived,
            forcesAssociationCounterDiscontinuityTime
            }
         STATUS      current
         DESCRIPTION
              "This notification is generated as soon
               as an association leaves the UP state.
               Note that these notifications are not
               throttled as the CE itself should
               throttle the setup of associations."
         ::= { forcesMibNotifications 4 }

-- Objects



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      forcesLatestProtocolVersionSupported OBJECT-TYPE
          SYNTAX      ForcesProtocolVersion
          MAX-ACCESS  read-only
          STATUS      current
          DESCRIPTION
                 "The ForCES protocol version supported by the CE.
                  The current protocol version is 1.
                  Note that the CE must also allow interaction
                  with FEs supporting earlier versions."
          ::= { forcesMibObjects 1 }

      forcesAssociations OBJECT IDENTIFIER ::= { forcesMibObjects 2 }

      forcesAssociationTable OBJECT-TYPE
          SYNTAX SEQUENCE OF ForcesAssociationEntry
          MAX-ACCESS not-accessible
          STATUS current
          DESCRIPTION
                 "The (conceptual) table of associations."
          ::= { forcesAssociations 1 }

      forcesAssociationEntry OBJECT-TYPE
          SYNTAX ForcesAssociationEntry
          MAX-ACCESS not-accessible
          STATUS current
          DESCRIPTION
                 "A (conceptual) entry for one association."
          INDEX { forcesAssociationCEID, forcesAssociationFEID }
          ::= { forcesAssociationTable 1 }

      ForcesAssociationEntry ::= SEQUENCE {
              forcesAssociationCEID             ForcesID,
              forcesAssociationFEID             ForcesID,

              forcesAssociationRunningProtocolVersion
                                          ForcesProtocolVersion,

              forcesAssociationTimeUp           TimeStamp,
              forcesAssociationTimeDown         TimeStamp,

              forcesAssociationHBMsgSent        ZeroBasedCounter32,
              forcesAssociationHBMsgReceived    ZeroBasedCounter32,
              forcesAssociationOperMsgSent      ZeroBasedCounter32,
              forcesAssociationOperMsgReceived  ZeroBasedCounter32,
              forcesAssociationCounterDiscontinuityTime  TimeStamp
     }

      forcesAssociationCEID OBJECT-TYPE



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          SYNTAX ForcesID
          MAX-ACCESS not-accessible
          STATUS current
          DESCRIPTION
                 "The ForCES ID of the CE."
          ::= { forcesAssociationEntry 1 }

      forcesAssociationFEID OBJECT-TYPE
          SYNTAX ForcesID
          MAX-ACCESS not-accessible
          STATUS current
          DESCRIPTION
                 "The ForCES ID of the FE."
          ::= { forcesAssociationEntry 2 }

      forcesAssociationRunningProtocolVersion OBJECT-TYPE
          SYNTAX      ForcesProtocolVersion
          MAX-ACCESS  read-only
          STATUS      current
          DESCRIPTION
          "The current ForCES protocol version used in this
           association.
           The current protocol version is 1."
          ::= { forcesAssociationEntry 3 }

      forcesAssociationTimeUp OBJECT-TYPE
          SYNTAX TimeStamp
          MAX-ACCESS read-only
          STATUS current
          DESCRIPTION
                 "The value of sysUpTime at the time this
                  association entered the UP state.
                  If this association started prior to the last
                  initialization of the network subsystem, then
                  this object contains a zero value.
                  This object allows to uniquely identify
                  associations with the same CE and FE IDs."
          ::= { forcesAssociationEntry 4 }

      forcesAssociationTimeDown OBJECT-TYPE
          SYNTAX TimeStamp
          MAX-ACCESS accessible-for-notify
          STATUS current
          DESCRIPTION
                 "The value of sysUpTime at the time this
                  association left the UP state."
          ::= { forcesAssociationEntry 5 }




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      forcesAssociationHBMsgSent OBJECT-TYPE
          SYNTAX ZeroBasedCounter32
          MAX-ACCESS read-only
          STATUS current
          DESCRIPTION
                 "A counter of how many heartbeat messages have
                  have been sent by the CE on this association
                  since the association entered the UP state.
                  Discontinuities in the value of this counter
                  can occur at re-initialization of the management
                  system, and at other times as indicated by the
                  value of forcesAssociationCounterDiscontinuityTime."
          ::= { forcesAssociationEntry 6 }

      forcesAssociationHBMsgReceived OBJECT-TYPE
          SYNTAX ZeroBasedCounter32
          MAX-ACCESS read-only
          STATUS current
          DESCRIPTION
                 "A counter of how many heartbeat messages
                  have been received by the CE on this association
                  since the association entered the UP state.
                  Discontinuities in the value of this counter
                  can occur at re-initialization of the management
                  system, and at other times as indicated by the
                  value of forcesAssociationCounterDiscontinuityTime."
          ::= { forcesAssociationEntry 7 }

      forcesAssociationOperMsgSent OBJECT-TYPE
          SYNTAX ZeroBasedCounter32
          MAX-ACCESS read-only
          STATUS current
          DESCRIPTION
                 "A counter of how many messages other than
                  heartbeat (i.e., config and query)
                  have been sent by the CE on this association
                  since the association entered the UP state.
                  Discontinuities in the value of this counter
                  can occur at re-initialization of the management
                  system, and at other times as indicated by the
                  value of forcesAssociationCounterDiscontinuityTime."
          ::= { forcesAssociationEntry 8 }

      forcesAssociationOperMsgReceived OBJECT-TYPE
          SYNTAX ZeroBasedCounter32
          MAX-ACCESS read-only
          STATUS current
          DESCRIPTION



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                 "A counter of how many messages other than
                  heartbeat (i.e., config response, query response,
                  event notification, and packet redirect)
                  have been received by the CE on this association
                  since the association entered the UP state.
                  Discontinuities in the value of this counter
                  can occur at re-initialization of the management
                  system, and at other times as indicated by the
                  value of forcesAssociationCounterDiscontinuityTime."
          ::= { forcesAssociationEntry 9 }

      forcesAssociationCounterDiscontinuityTime OBJECT-TYPE
          SYNTAX TimeStamp
          MAX-ACCESS read-only
          STATUS current
          DESCRIPTION
                 "The value of sysUpTime on the most recent occasion
                  at which any one or more of this association's
                  counters suffered a discontinuity. The relevant
                  counters are the specific instances associated with
                  this association of any ZeroBasedCounter32 object
                  contained in the forcesAssociationTable. If no
                  such discontinuities have occured since the last
                  reinitialization of the local management subsystem,
                  then this object contains a zero value."
          ::= { forcesAssociationEntry 10 }



-- Conformance

      forcesMibCompliances   OBJECT IDENTIFIER
                               ::= { forcesMibConformance 1 }
      forcesMibGroups        OBJECT IDENTIFIER
                               ::= { forcesMibConformance 2 }

-- Compliance statements

      forcesMibCompliance  MODULE-COMPLIANCE
          STATUS current
          DESCRIPTION
            "The compliance statement for routers running ForCES and
            implementing the ForCES MIB."
          MODULE  -- this module
            MANDATORY-GROUPS { forcesMibGroup, forcesNotificationGroup }

            GROUP forcesNotificationStatsGroup
            DESCRIPTION



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              "Implementation of this group is recommended."

            GROUP forcesStatsGroup
            DESCRIPTION
              "Implementation of this group is recommended."

          ::= { forcesMibCompliances 1 }


-- Units of conformance

      forcesNotificationGroup NOTIFICATION-GROUP
          NOTIFICATIONS { forcesAssociationEntryUp,
                          forcesAssociationEntryDown
                        }
          STATUS  current
          DESCRIPTION

            "A collection of notifications for signaling important
             ForCES events."
          ::= { forcesMibGroups 1 }

      forcesMibGroup OBJECT-GROUP
          OBJECTS { forcesLatestProtocolVersionSupported,
                    forcesAssociationRunningProtocolVersion
                  }
          STATUS  current
          DESCRIPTION
            "A collection of objects to support management of ForCES
             routers."
        ::= { forcesMibGroups 2 }


      forcesNotificationStatsGroup NOTIFICATION-GROUP
          NOTIFICATIONS { forcesAssociationEntryUpStats,
                          forcesAssociationEntryDownStats
                        }
          STATUS  current
          DESCRIPTION

            "A collection of optional notifications for signaling
             important ForCES events including statistics."
          ::= { forcesMibGroups 3 }

      forcesStatsGroup OBJECT-GROUP
          OBJECTS { forcesAssociationTimeUp,
                    forcesAssociationTimeDown,
                    forcesAssociationHBMsgSent,



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                    forcesAssociationHBMsgReceived,
                    forcesAssociationOperMsgSent,
                    forcesAssociationOperMsgReceived,
                    forcesAssociationCounterDiscontinuityTime
                  }
          STATUS  current
          DESCRIPTION
            "A collection of optional objects to provide extra
             information about the associations. There is no protocol
             reason to keep such information, but these objects can
             be very useful in debugging connectivity problems."
        ::= { forcesMibGroups 4}

      END


6.  Associations kept in the MIB

   Associations enter the UP state as soon as the CE has sent to the FE
   an Association Setup Response message containing a successful
   Association Setup Result.  Only associations that are UP are
   reflected in this MIB module.

   Associations are removed from the MIB module as soon as they leave
   the UP state, i.e., if the CE has not received any message (Heartbeat
   or other protocol message) from the FE within a given time period or
   if an Association Teardown message has been sent by the CE.

   Statistics counters are initialized to zero when the association is
   created.  If the same association goes down and comes back up, the
   counters will reset and the discontinuity can be discovered by
   checking the discontinuity timestamp.  In addition, the time-up
   timestamp in the association allows to distinguish new associations
   from past ones with the same index.  Note that the optional down
   notification contains the statistics with the final values of the
   statistics counters.


7.  Support for multiple CEs and FEs

   An NE consists of one or more FEs and one or more CEs.  Where there
   is a single CE, that CE will have knowledge of all the associations
   in the NE and so can provide the information necessary to support the
   managed objects defined in this MIB module.  Where there is more than
   one CE, information about the associations may be distributed among
   the CEs.  Whether each CE implements the managed objects for the
   associations of which it is aware or whether the CEs cooperate to
   present the appearance of a single set of managed objects for all the



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   associations in the NE is outside the scope of this document.


8.  Security Considerations

   There are no management objects defined in this MIB module that have
   a MAX-ACCESS clause of read-write and/or read-create.  So, if this
   MIB module is implemented correctly, then there is no risk that an
   intruder can alter or create any management objects of this MIB
   module via direct SNMP SET operations.

   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  Objects in the forcesMibGroup are protocol versions.  They are
      neither sensitive nor vulnerable.

   o  Objects in the forcesStatsGroup are statistics.  They are neither
      sensitive nor vulnerable.

   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.


9.  IANA Considerations

   The MIB module in this document uses the following IANA-assigned



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   OBJECT IDENTIFIER values recorded in the SMI Numbers registry:


         Descriptor        OBJECT IDENTIFIER value
         ----------        -----------------------

         forcesMIB         { mib-2 XXX }

   Editor's Note (to be removed prior to publication): the 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 "XXX"
   (here and in the MIB module) with the assigned value and to remove
   this note.


10.  Changes from Previous Draft Revisions

   Editor's Note (to be removed prior to publication): Prior to RFC
   publication of this document, the RFC Editor is asked to remove this
   entire section titled "Changes from Previous Draft Versions".

   Changes from draft-ietf-forces-mib-09: Moved the DISPLAY-HINT clause
   in the ForcesProtocolVersion MIB object before the STATUS clause to
   be conformant with RFC2579 (comment from Bert).

   Changes from draft-ietf-forces-mib-08:

   o  Changed the MIB objects forcesAssociationOtherMsgSent and
      forcesAssociationOtherMsgReceived to forcesAssociationOperMsgSent
      and forcesAssociationOperMsgReceived as they are not all other
      messages besides HB (comment from the General Area Review Team).

   o  Changed MIB counter objects forcesAssociationHBMsgSent,
      forcesAssociationHBMsgReceived, forcesAssociationOperMsgSent, and
      forcesAssociationOperMsgReceived from Counter32 to
      ZeroBasedCounter32 (comment from Bert Wijnen).  Adapted the
      paragraph about statistics counters in section "Associations kept
      in the MIB"

   o  Introduced a MIB object forcesAssociationCounterDiscontinuityTime,
      and added it to the forcesAssociationEntry as well as to the
      forcesAssociationEntryDownStats notification and the
      forcesStatsGroup compliance group.  Added text on discontinuity
      for all counter objects.

   o  Removed MIB counters from the forcesAssociationEntryUpStats
      notification, as passing now zero values is useless.



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   Changes from draft-ietf-forces-mib-07: They are editorial changes
   made as suggested by the General Area Review Team.

   Changes from draft-ietf-forces-mib-06:

   o  Informational RFCs 3654 and 3746 moved to Informative References
      section.

   o  Updated chairs' names in the MIB description.

   o  Update references to protocol and applicability drafts.

   o  Reversed the order of the two first sentences in section
      "Associations kept in the MIB"

   Changes from draft-ietf-forces-mib-05: Copyright statement in the MIB
   description corrected to IETF Trust.

   Changes from draft-ietf-forces-mib-04.  They are changes suggested by
   the MIB doctor review, according to the MIB Review Checklist in
   Appendix A of RFC 4181:

   o  Changed MIB descriptions with "since the association entered the
      UP state" instead of "since the association is up".

   o  Updated the I-D boilerplate copyright statement.

   o  Removed last sentence of abstract.

   o  Moved the MIB boilerplate into a section of its own.

   o  Moved the MIB definition into a section of its own.

   o  Updated the Security Considerations section according to the
      boilerplate at http://www.ops.ietf.org/mib-security.html.

   o  Updated the MIB description with the copyright statement.

   o  Added DISPLAY-HINT to the ForCESProtocolVersion.  Note that the
      smilint tool doesn't like it.

   o  Added IETF to the MODULE-IDENTITY ORGANIZATION.

   o  Updated CONTACT-INFO to indicate how to reach the group.

   o  Changed forcesAssocationTimeDown MAX-ACCESS to accessible-for-
      notify.




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   o  Added text to DESCRIPTION of forcesAssociationTimeUp to indicate
      that it allows to uniquely identify associations with the same FE
      and CE IDs.

   o  Added two optional notifications that carry stats and added
      corresponding text in the last paragraph of section titled
      "Associations kept in the MIB".  The reason is that optional
      objects such as stats in a mandatory notification are not
      supported.

   Changes from draft-ietf-forces-mib-03.  They are small fixes to the
   text and the MIB module:

   o  Added MIB boilerplate according to
      http://www.ops.ietf.org/mib-boilerplate.html

   o  Clarified terminology with respect to MIB module and MIB managed
      objects.

   o  Added RFC Editor note to indicate RFC number for version 1 of
      ForCES protocol under ForcesProtocolVersion.

   o  Renumbered elements in forcesAssociationEntry starting with 1.

   o  Changed ForcesProtocolVersion from INTEGER to Integer32.

   o  Added forcesLatestProtocolVersionSupported into the mandatory
      forcesMibGroups conformance group.

   o  Explicitely added the forcesStatsGroup to the forcesMibCompliance
      compliance statement as optional.

   o  Moved the MIB Definition section to the front.

   o  Rephrased IANA Considerations section according to RFC 4181
      Section 3.5.2.

   o  Added RFC Editor note to remove the "Changes from Previous Draft
      Revisions" section prior to publication.

   Changes from draft-ietf-forces-mib-02.  They are refinements of the
   MIB module:

   o  Changed forcesAssociationCEID and forcesAssociationFEID from read-
      only to not-accessible to conform with Section 7.7 in [RFC2578].

   o  Removed forcesAssociationCEID and forcesAssociationFEID from the
      notifications.  This information is conveyed in the OID anyway.



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   o  Added MIB conformance information.

   Changes from draft-ietf-forces-mib-01.  The changes are in response
   to the Working Group Last Call:

   o  Addition of two traps/notifications to signal the associations
      that enter or leave the UP state.

   o  Suppression of the DOWN and ESTABLISHING states.  Only
      associations in the UP state are kept in the table.

   o  Split of the Message counters into Heartbeat and other messages.

   o  Addition of the current running version of ForCES protocol for
      each association in the UP state.

   o  Addition of the latest version of the ForCES protocol supported by
      the CE.


11.  References

11.1.  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.

   [forces-protocol-draft]
              Doria, A., Haas, R., Hadi Salim, J., Khosravi, H., and W.
              Wang, "ForCES Protocol Specification", ID Document:
              draft-ietf-forces-protocol-15.txt, August 2008.

11.2.  Informative References

   [RFC3410]  Case, J., Mundy, R., Partain, D., and B. Stewart,
              "Introduction and Applicability Statements for Internet-



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              Standard Management Framework", RFC 3410, December 2002.

   [RFC3654]  Khosravi, H. and T. Anderson, "Requirements for Separation
              of IP Control and Forwarding", RFC 3654, November 2003.

   [RFC3746]  Yang, L., Dantu, R., Anderson, T., and R. Gopal,
              "Forwarding and Control Element Separation (ForCES)
              Framework", RFC 3746, April 2004.

   [forces-applicability-draft]
              Crouch, A., Khosravi, H., Handley, M., and A. Doria,
              "ForCES Applicability Statement", ID Document:
              draft-ietf-forces-applicability-05.txt, July 2006.


Appendix A.  Acknowledgments

   The author gratefully acknowledges the contributions of: Jinrong
   Fenggen, John Flick, Xiaoyi Guo, Joel Halpern, Tom Petch, and Jamal
   Hadi Salim.


Author's Address

   Robert Haas
   IBM
   Saeumerstrasse 4
   Rueschlikon  8803
   CH

   Email: rha@zurich.ibm.com
   URI:   http://www.zurich.ibm.com/~rha



















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