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Versions: (draft-stephan-pce-disc-mib) 00 01 02 03 04

Network Working Group                                         E. Stephan
Internet-Draft                                            France Telecom
Intended status: Standards Track                           March 5, 2007
Expires: September 6, 2007


 Definitions of Managed Objects for Path Computation Element Discovery
                       draft-ietf-pce-disc-mib-01

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
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   This Internet-Draft will expire on September 6, 2007.

Copyright Notice

   Copyright (C) The IETF Trust (2007).

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 describes objects used for managing Path
   Computation Elements Discovery.







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Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  The Internet-Standard Management Framework . . . . . . . . . .  3
   3.  Conventions  . . . . . . . . . . . . . . . . . . . . . . . . .  3
   4.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  3
   5.  Overview . . . . . . . . . . . . . . . . . . . . . . . . . . .  4
   6.  Structure of the MIB Module  . . . . . . . . . . . . . . . . .  4
     6.1.  The Discovery objects  . . . . . . . . . . . . . . . . . .  4
     6.2.  General PCEs capabilities objects  . . . . . . . . . . . .  5
     6.3.  PCEs Computation options objects . . . . . . . . . . . . .  5
     6.4.  PCEs Activity Objects  . . . . . . . . . . . . . . . . . .  5
     6.5.  The Notification Group . . . . . . . . . . . . . . . . . .  5
   7.  Relationship to Other MIB Modules  . . . . . . . . . . . . . .  6
     7.1.  Relationship to  IGP MIB modules . . . . . . . . . . . . .  6
     7.2.  MIB modules required for IMPORTS . . . . . . . . . . . . .  6
   8.  Definitions  . . . . . . . . . . . . . . . . . . . . . . . . .  6
   9.  Security Considerations  . . . . . . . . . . . . . . . . . . . 21
   10. IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 22
   11. References . . . . . . . . . . . . . . . . . . . . . . . . . . 22
     11.1. Normative References . . . . . . . . . . . . . . . . . . . 22
     11.2. Informative References . . . . . . . . . . . . . . . . . . 23
   Appendix A.  Open Issues . . . . . . . . . . . . . . . . . . . . . 23
   Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 23
   Intellectual Property and Copyright Statements . . . . . . . . . . 24


























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1.  Introduction

   This memo defines a portion of the Management Information Base (MIB)
   for use with network management protocols in the Internet community.
   In particular, it describes objects used for managing Path
   Computation Elements Discovery.

   For an introduction to the concepts of PCE, see [RFC4655].


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", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL", when they appear in this document, are to be interpreted
   as described in BCP 14, RFC 2119 [RFC2119].


4.  Terminology

   The terminology used in this document is built on notions introduced
   and discussed in PCE WG documents.  The reader should be familiar
   with these documents

   Domain:
      any collection of network elements within a common sphere of
      address management or path computational responsibility.

   IGP Area:
      OSPF Area or ISIS level.

   PCC:



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      Path Computation Client: any client application requesting a path
      computation to be performed by a Path Computation Element.

   PCE:
      Path Computation Element: an entity (component, application, or
      network node) that is capable of computing a network path or route
      based on a network graph, and applying computational constraints.


5.  Overview

   [RFC4655] describes the architecture for a PCE-based path computation
   model for MPLS and GMPLS TE LSPs.  The architecture allows the
   separation of PCE from PCC.  It requires that a PCC be aware of the
   location of one or more PCEs.  This relies on a communication
   protocol between PCC and PCE for automatic and dynamic PCE discovery.

   [RFC4674] defines the PCE discovery mechanism and information
   elements.

   [I-D.ietf-pce-disco-proto-isis] and [I-D.ietf-pce-disco-proto-ospf]
   decline the PCE discovery as an extension a PCE participating in the
   IGP advertises.

   The current MIB module defines the objects the section "6.10.2.1.
   PCC MIB module " of [RFC4674] identifies as to be disclosed on the
   management interface of the PCC.


6.  Structure of the MIB Module

   This MIB module is arranged into groups.  Each group is organized as
   a set of related objects.  The overall structure and assignment of
   objects to their groups, and the intended purpose of each group, is
   shown below.

6.1.  The Discovery objects

   These objects provide general information on the PCEs discovered.

   It includes:
      - A control to disable the automatic discovery mechanism;
      - The number of known PCEs;
      - The number of discovered PCEs;
      - The set of known PCEs.






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         pceDiscoveryTable gives discovery information per PCE:
            - Addresses, discovery Mechanism type;
            - Discovery time, last activity time;
            - Congestion and congestion duration.

6.2.  General PCEs capabilities objects

   These objects report on general computation capabilities per PCE as
   defined in PCE-PATHSCOPE, PCE-DOMAINS and PCE-DEST-DOMAINS
   information elements.

   The objects of pceDiscCapPathScopeTable define PCE computation
   capabilities and PCE preferences per kind of routing domain.

   The objects of pceDiscCapDomainTable defines domains for which a PCE
   has topology visibility and can compute paths.

   The objects of pceDiscCapDestDomainTable defines domains toward which
   a PCE can compute path.

6.3.  PCEs Computation options objects

   These objects provides computation options per PCE as defined in
   GENERAL-CAP and PATH-COMP-CAP information elements.

6.4.  PCEs Activity Objects

   These objects describe the activity of the discovery mechanism of
   each PCE to enable effective analysis of the operation of the
   protocols.

   pceDiscActivityTable reports on the activity of the discovery
   protocol per PCE:
   o  Modification of PCE discovery;
   o  The average and maximum rates of arrival, departure of PCE
      discovery information;
   o  The number of unacceptable and incomprehensible discovery
      information exchanges.

6.5.  The Notification Group

   This group defines notifications to inform of important events
   related to the monitoring of the PCE Discovery sessions such as the
   ending of all the sessions and abnormal rate of unacceptable
   messages.






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7.  Relationship to Other MIB Modules

7.1.  Relationship to  IGP MIB modules

   PCE Discovery relies on existing protocols which have specialized MIB
   objects to monitor their own activities.  Consequently this document
   considers that monitoring underlying protocols in out of the scope of
   the current MIB module.

7.2.  MIB modules required for IMPORTS

   The following MIB module IMPORTS objects from SNMPv2-SMI [RFC2578],
   SNMPv2-TC [RFC2579], SNMPv2-CONF [RFC2580], and IF-MIB [RFC2863] and
   also REFERENCEs document RFC0768 [RFC0768]


8.  Definitions

   PCE-DISC-STD-MIB DEFINITIONS ::= BEGIN

   IMPORTS
      MODULE-IDENTITY, OBJECT-TYPE, NOTIFICATION-TYPE,
      Counter32, Unsigned32, Gauge32, Integer32, IpAddress,
      experimental FROM SNMPv2-SMI
      RowStatus,
      TEXTUAL-CONVENTION,
      TimeStamp,
      TruthValue

         FROM SNMPv2-TC
      Ipv6Address
         FROM IPV6-TC
      MODULE-COMPLIANCE,
      OBJECT-GROUP,
      NOTIFICATION-GROUP
         FROM SNMPv2-CONF
      AddressFamilyNumbers
         FROM IANA-ADDRESS-FAMILY-NUMBERS-MIB
      IANAipRouteProtocol
         FROM IANA-RTPROTO-MIB
      pceStdMIB, PceRoutingDomainID
         FROM PCE-TC-STD-MIB; -- [RFCxxxx]
         -- rfc editor replace xxxx with the rfc number

   pceDiscDraftMIB MODULE-IDENTITY
      LAST-UPDATED "200603040000Z" -- March 4, 2007





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      ORGANIZATION "Path Computation Element (PCE) Working Group"
      CONTACT-INFO "
         Stephan Emile
         France Telecom
      Email: emile.stephan@orange-ftgroup.com
      Email comments directly to the PCE WG Mailing List at pce@ietf.org
      WG-URL: http://www.ietf.org/html.charters/pce-charter.html
      "
   DESCRIPTION
      "This MIB module defines a collection of objects for managing Path
      Computation Elements (PCEs) Discovery."
   ::= { pceStdMIB 2 }

   pceDiscNotifications OBJECT IDENTIFIER ::= { pceDiscStdMIB 0 }

   pceDiscMIBObjects OBJECT IDENTIFIER ::= { pceDiscStdMIB 1 }

   pceDiscoveryObjects OBJECT IDENTIFIER ::= { pceDiscMIBObjects 1 }

   pceDiscoveryAdminStatus OBJECT-TYPE
      SYNTAX INTEGER {
         enabled(1),
         disabled(2)
      }
      MAX-ACCESS read-write
      STATUS current
      DESCRIPTION
         "Setting this object to disabled(2) disables the discovery of
         PCEs.  Once disabled, The discovery must be explicitly enabled
         to restore discovery of PCEs.  Setting this object to
         enabled(1) enables the discovery of PCEs."
      ::= { pceDiscoveryObjects 1 }

   pceDiscoveryKnownPCEs OBJECT-TYPE
      SYNTAX Counter32
      MAX-ACCESS read-only
      STATUS current
      DESCRIPTION
         "The number of PCEs the PCC is potentially in relation with.
         This includes PCE manually declared and active PCEs"
      ::= { pceDiscoveryObjects 2 }

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





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      DESCRIPTION
         "The number of active PCEs.
         The detection of the activity a a PCE depends on the nature
         discovery mechanism.
         PCE discovered using PCED information received:
            The relation between the PCC and a PCE is active while the
            PCE discovery protocol maintains a communication between the
            PCC and this PCE.
         PCE Manually declared:
            The relation between the PCC and a PCE is active and the
            discovery mechanism is implementation specific;
         "
      ::= { pceDiscoveryObjects 3 }

   pceDiscoveryTable OBJECT-TYPE
      SYNTAX SEQUENCE OF PceDiscoveryEntry
      MAX-ACCESS not-accessible
      STATUS current
      DESCRIPTION
         "Information describing the PCEs discovered."
      ::= { pceDiscoveryObjects 4 }

   pceDiscoveryEntry OBJECT-TYPE
      SYNTAX PceDiscoveryEntry
      MAX-ACCESS not-accessible
      STATUS current
      DESCRIPTION
         "Information describing general information of each PCE
         discovered."
      INDEX { pceDiscoveryIndex }
      ::= { pceDiscoveryTable 1 }

   PceDiscoveryEntry ::= SEQUENCE {
      pceDiscoveryIndex Integer32,
      pceDiscoveryMechanism IANAipRouteProtocol,
      pceDiscoveryIPv4Address IpAddress,
      pceDiscoveryIPv6Address Ipv6Address,
      pceDiscoveryTime TimeStamp,
      pceDiscoveryLastUpdated TimeStamp,
      pceDiscoveryCongestion TruthValue,
      pceDiscoveryCongestionDuration Unsigned32
   }

   pceDiscoveryIndex OBJECT-TYPE
      SYNTAX Integer32 (1..2147483647)
      MAX-ACCESS notification-only





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      STATUS current
      DESCRIPTION
         "This object identifies locally the PCE for which this entry
         contains information."
      ::= { pceDiscoveryEntry 1 }

   pceDiscoveryMechanism OBJECT-TYPE
      SYNTAX IANAipRouteProtocol
      MAX-ACCESS read-only
      STATUS current
      DESCRIPTION
         "This object identifies the type of discovery mechanism used to
         discover the PCE.
         The discovery mechanisms covered by PCE WG at the time of the
         specification are :
            other (1), --not specified
            local (2), -- local interface
            isIs (9), -- Dual IS-IS
            ospf (13), -- Open Shortest Path First
            bgp (14), -- Border Gateway Protocol
         It does not preclude the usage of another routing protocol
         numbered by this IANAipRouteProtocol
         "
      ::= { pceDiscoveryEntry 2 }

   pceDiscoveryIPv4Address OBJECT-TYPE
      SYNTAX IpAddress
      MAX-ACCESS read-only
      STATUS current
      DESCRIPTION
         "This object is the IP address to be used to reach the PCE.  It
         corresponds to the PCED PCE-ADDRESS.
         .
         A value of 0.0.0.0 indicates the absence of this address."
      ::= { pceDiscoveryEntry 3 }

   pceDiscoveryIPv6Address OBJECT-TYPE
      SYNTAX Ipv6Address
      MAX-ACCESS read-only
      STATUS current
      DESCRIPTION
         "This object is the IPv6 address to be used to reach the PCE.
         It corresponds to the PCED PCE-ADDRESS.
         A value of ::0 indicates the absence of this address."
      ::= { pceDiscoveryEntry 4 }

   pceDiscoveryTime OBJECT-TYPE




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      SYNTAX TimeStamp
      MAX-ACCESS read-only
      STATUS current
      DESCRIPTION
         "The value of sysUpTime at the time this entry was created.
         local entry: the value of sysUpTime at the time the PCC
         restarted."
      ::= { pceDiscoveryEntry 5 }

   pceDiscoveryLastUpdated OBJECT-TYPE
      SYNTAX TimeStamp
      MAX-ACCESS read-only
      STATUS current
      DESCRIPTION
         "The value of sysUpTime at the time this entry was last
         updated.
         Static entry: if the entry values keep unchanged since the re-
         initialization of the PCC then this object contains a zero
         value."
      ::= { pceDiscoveryEntry 6 }

   pceDiscoveryCongestion OBJECT-TYPE
      SYNTAX TruthValue
      MAX-ACCESS read-only
      STATUS current
      DESCRIPTION
         "This object indicates whether a PCE experiences a processing
         congestion state or not.
         "
      ::= { pceDiscoveryEntry 7 }

   pceDiscoveryCongestionDuration OBJECT-TYPE
      SYNTAX Unsigned32
      MAX-ACCESS read-only
      STATUS current
      DESCRIPTION
         "This object specifies, in seconds, the congestion duration.
         When the value of pceDiscoveryCongestion is 'false' then this
         objet MUST be to '0'"
      ::= { pceDiscoveryEntry 8 }

   pceDiscCapabilityObjects OBJECT IDENTIFIER ::= { pceDiscMIBObjects 2
   }

   --

   -- PCE-PATHSCOPE informations elements




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   --

   pceDiscCapPathScopeTable OBJECT-TYPE
      SYNTAX SEQUENCE OF PceDiscCapPathScopeEntry
      MAX-ACCESS not-accessible
      STATUS current
      DESCRIPTION
         "Information describing the capacity of the PCEs discovered."
      ::= { pceDiscCapabilityObjects 1 }

   pceDiscCapPathScopeEntry OBJECT-TYPE
      SYNTAX PceDiscCapPathScopeEntry
      MAX-ACCESS not-accessible
      STATUS current
      DESCRIPTION
         "Information describing the capacity of each PCE discovered."
      INDEX { pceDiscoveryIndex }
      ::= { pceDiscCapPathScopeTable 1 }

   PceDiscCapPathScopeEntry ::= SEQUENCE {
      pceDiscCapPathScopeIntraArea TruthValue,
      pceDiscCapPathScopeInterArea TruthValue,
      pceDiscCapPathScopeDefInterArea TruthValue,
      pceDiscCapPathScopeInterAS TruthValue,
      pceDiscCapPathScopeDefInterAS TruthValue,
      pceDiscCapPathScopeInterLayer TruthValue,
      pceDiscCapPathScopePrefIntraArea Integer32,
      pceDiscCapPathScopePrefInterArea Integer32,
      pceDiscCapPathScopePrefInterAS Integer32,
      pceDiscCapPathScopePrefIntLayer Integer32
   }

   pceDiscCapPathScopeIntraArea OBJECT-TYPE
      SYNTAX TruthValue
      MAX-ACCESS read-only
      STATUS current
      DESCRIPTION
         "Indicates whether the PCE supports the L option of the PATH-
         SCOPE sub TLV:
            The value is 'true' if the PCE can compute intra-area path."
      ::= { pceDiscCapPathScopeEntry 1 }

   pceDiscCapPathScopeInterArea OBJECT-TYPE
      SYNTAX TruthValue
      MAX-ACCESS read-only
      STATUS current





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      DESCRIPTION
         "Indicates whether the PCE supports the R option of the PATH-
         SCOPE sub TLV:
            The value is 'true' if the PCE can act as PCE for inter-area
            TE LSPs computation."
      ::= { pceDiscCapPathScopeEntry 2 }

   pceDiscCapPathScopeDefInterArea OBJECT-TYPE
      SYNTAX TruthValue
      MAX-ACCESS read-only
      STATUS current
      DESCRIPTION
         "Indicates whether the PCE supports the Rd option of the PATH-
         SCOPE sub TLV:
            The value is 'true' if the PCE can act as a default PCE for
            inter-area TE LSPs computation."
      ::= { pceDiscCapPathScopeEntry 3 }

   pceDiscCapPathScopeInterAS OBJECT-TYPE
      SYNTAX TruthValue
      MAX-ACCESS read-only
      STATUS current
      DESCRIPTION
         "Indicates whether the PCE supports the S option of the PATH-
         SCOPE sub TLV:
            The value is 'true' if the PCE can act as PCE for inter-AS
            TE LSPs computation."
      ::= { pceDiscCapPathScopeEntry 4 }

   pceDiscCapPathScopeDefInterAS OBJECT-TYPE
      SYNTAX TruthValue
      MAX-ACCESS read-only
      STATUS current
      DESCRIPTION
         "Indicates whether the PCE supports the Sd option of the PATH-
         SCOPE sub TLV:
            The value is 'true' if the PCE can act as a default PCE for
            inter-AS TE LSPs computation."
      ::= { pceDiscCapPathScopeEntry 5 }

   pceDiscCapPathScopeInterLayer OBJECT-TYPE
      SYNTAX TruthValue
      MAX-ACCESS read-only
      STATUS current
      DESCRIPTION
         "Indicates whether the PCE supports the Y option of the PATH-
         SCOPE sub TLV:




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            The value is 'true' if the PCE can compute or take part into
            the computation of paths across layers."
      ::= { pceDiscCapPathScopeEntry 6}

   pceDiscCapPathScopePrefIntraArea OBJECT-TYPE
      SYNTAX Integer32 (0..7)
      MAX-ACCESS read-only
      STATUS current
      DESCRIPTION
         "Indicates the level of preference of the option of computation
         'L' compared to other computation options:
            A value of 7 reflects the highest preference.
            When the value of PceDiscCapCompIntraArea is 'false' then
            this objet MUST be to '0'."
      ::= { pceDiscCapPathScopeEntry 7}

   pceDiscCapPathScopePrefInterArea OBJECT-TYPE
      SYNTAX Integer32 (0..7)
      MAX-ACCESS read-only
      STATUS current
      DESCRIPTION
         "Indicates the level of preference of the option of computation
         'R' compared to other computation options:
            A value of 7 reflects the highest preference.
            When the value of PceDiscCapCompInterArea is 'false' then
            this objet MUST be to '0'."
      ::= { pceDiscCapPathScopeEntry 8}

   pceDiscCapPathScopePrefInterAS OBJECT-TYPE
      SYNTAX Integer32 (0..7)
      MAX-ACCESS read-only
      STATUS current
      DESCRIPTION
         "Indicates the level of preference of the option of computation
         'S' compared to other computation options:
            A value of 7 reflects the highest preference.
            When the value of PceDiscCapCompInterAS is 'false' then this
            objet MUST be to '0'."
      ::= { pceDiscCapPathScopeEntry 9}

   pceDiscCapPathScopePrefIntLayer OBJECT-TYPE
      SYNTAX Integer32 (0..7)
      MAX-ACCESS read-only
      STATUS current
      DESCRIPTION
         "Indicates the level of preference of the option of computation
         'Y' compared to other computation options:




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            A value of 7 reflects the highest preference.
            When the value of PceDiscCapCompInterLayer is 'false' then
            this objet MUST be to '0'."
      ::= { pceDiscCapPathScopeEntry 10}

   --

   -- PCE-DOMAINS information elements

   --

   pceDiscCapDomainTable OBJECT-TYPE
      SYNTAX SEQUENCE OF PceDiscCapDomainEntry
      MAX-ACCESS not-accessible
      STATUS current
      DESCRIPTION
         "Information describing the set of domains where the PCE has
         topology visibility and can compute paths."
      ::= { pceDiscCapabilityObjects 2 }

   pceDiscCapDomainEntry OBJECT-TYPE
      SYNTAX PceDiscCapDomainEntry
      MAX-ACCESS not-accessible
      STATUS current
      DESCRIPTION
         "Information describing the domains of each PCE discovered."
      INDEX { pceDiscoveryIndex, pceDiscCapDomainIndex }
      ::= { pceDiscCapDomainTable 1 }

   PceDiscCapDomainEntry ::= SEQUENCE {
      pceDiscCapDomainIndex Integer32,
      pceDiscCapDomainIDType AddressFamilyNumbers,
      pceDiscCapDomainID PceRoutingDomainID
   }

   pceDiscCapDomainIndex OBJECT-TYPE
      SYNTAX Integer32 (1..2147483647)
      MAX-ACCESS not-accessible
      STATUS current
      DESCRIPTION
         "This object identifies locally a domain for which the PCE
         identified by pceDiscoveryIndex has topology visibility and can
         compute paths."
      ::= { pceDiscCapDomainEntry 1 }

   pceDiscCapDomainIDType OBJECT-TYPE





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      SYNTAX AddressFamilyNumbers
      MAX-ACCESS read-only
      STATUS current
      DESCRIPTION
         "This object identifies the type of the domainID of a PCE-
         DOMAIN SUB TLV.
         Acceptable types are :
            ipV4(1) and ipV6(2) for an OSPF area ID;
            nsap(3) for and ISIS area ID;
            asNumber(18) for an BGP AS number"
      ::= { pceDiscCapDomainEntry 2 }

   pceDiscCapDomainID OBJECT-TYPE
      SYNTAX PceRoutingDomainID
      MAX-ACCESS read-only
      STATUS current
      DESCRIPTION
         "The ID (area,AS) of the routing domain for which this entry
         contains information."
      ::= { pceDiscCapDomainEntry 3 }

   --

   -- PCE-DEST-DOMAINS information elements

   --

   pceDiscCapDestDomainTable OBJECT-TYPE
      SYNTAX SEQUENCE OF PceDiscCapDestDomainEntry
      MAX-ACCESS not-accessible
      STATUS current
      DESCRIPTION
         "Information describing the set of destination domains toward
         which a PCE can compute path."
      ::= { pceDiscCapabilityObjects 3 }

   pceDiscCapDestDomainEntry OBJECT-TYPE
      SYNTAX PceDiscCapDestDomainEntry
      MAX-ACCESS not-accessible
      STATUS current
      DESCRIPTION
         "Information describing the destination domains of each PCE."
      INDEX { pceDiscoveryIndex, pceDiscCapDestDomainIndex }
      ::= { pceDiscCapDestDomainTable 1 }

   PceDiscCapDestDomainEntry ::= SEQUENCE {





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      pceDiscCapDestDomainIndex Integer32,
      pceDiscCapDestDomainIDType AddressFamilyNumbers,
      pceDiscCapDestDomainID PceRoutingDomainID
   }

   pceDiscCapDestDomainIndex OBJECT-TYPE
      SYNTAX Integer32 (1..2147483647)
      MAX-ACCESS not-accessible
      STATUS current
      DESCRIPTION
         "This object identifies locally a destination domain toward
         which a PCE identified by pceDiscoveryIndex can compute path."
      ::= { pceDiscCapDestDomainEntry 1 }

   pceDiscCapDestDomainIDType OBJECT-TYPE
      SYNTAX AddressFamilyNumbers
      MAX-ACCESS read-only
      STATUS current
      DESCRIPTION
         "This object identifies the type of the routing domain.
         Acceptable types are :
            ipV4(1) and ipV6(2) for an OSPF area ID;
            nsap(3) for and ISIS area ID;
            asNumber(18) for an BGP AS number"
      ::= { pceDiscCapDestDomainEntry 2 }

   pceDiscCapDestDomainID OBJECT-TYPE
      SYNTAX PceRoutingDomainID
      MAX-ACCESS read-only
      STATUS current
      DESCRIPTION
         "The ID (area,AS) of the routing domain for which this entry
         contains information."
      ::= { pceDiscCapDestDomainEntry 3 }


   pceDiscComputationOptionsObjects OBJECT IDENTIFIER ::= {
   pceDiscMIBObjects 3 }

   -- GENERAL-CAP and PATH-COMP-CAP

   pceDiscComputationOptionsTable OBJECT-TYPE
      SYNTAX SEQUENCE OF PceDiscComputationOptionsEntry
      MAX-ACCESS not-accessible
      STATUS current
      DESCRIPTION





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         "Information describing computation options supported by each
         PCE."
      ::= { pceDiscComputationOptionsObjects 1 }

   pceDiscComputationOptionsEntry OBJECT-TYPE
      SYNTAX PceDiscComputationOptionsEntry
      MAX-ACCESS not-accessible
      STATUS current
      DESCRIPTION
         "Information describing computation options of one PCE.  "
      INDEX { pceDiscoveryIndex }
      ::= { pceDiscComputationOptionsTable 1 }

   PceDiscComputationOptionsEntry ::= SEQUENCE {
      pceDiscCompOptionsRpriority INTEGER,
      pceDiscCompOptionsMmessages INTEGER
      }

   pceDiscCompOptionsRpriority OBJECT-TYPE
      SYNTAX INTEGER {

         supported(1),
         notSupported(2)
      }
      MAX-ACCESS read-only
      STATUS current
      DESCRIPTION
         "The PCE identified by pceDiscoveryIndex supports for Request
         prioritization if the value of this object is supported(1)."
      ::= { pceDiscComputationOptionsEntry 1 }

   pceDiscCompOptionsMmessages OBJECT-TYPE
      SYNTAX INTEGER {
         supported(1),
         notSupported(2)
      }
      MAX-ACCESS read-only
      STATUS current
      DESCRIPTION
         " If the value of this object is supported(1), then the PCE
         identified by pceDiscoveryIndex supports for multiple messages
         within the same request message."
      ::= { pceDiscComputationOptionsEntry 2 }

   -- Activity objects

   pceDiscActivityObjects OBJECT IDENTIFIER ::= { pceDiscMIBObjects 4 }




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   pceDiscActivityTable OBJECT-TYPE
      SYNTAX SEQUENCE OF PceDiscActivityEntry
      MAX-ACCESS not-accessible
      STATUS current
      DESCRIPTION
         "Information describing for each PCE the activity of the
         discovery mechanism."
      ::= { pceDiscActivityObjects 1 }

   pceDiscActivityEntry OBJECT-TYPE
      SYNTAX PceDiscActivityEntry
      MAX-ACCESS not-accessible
      STATUS current
      DESCRIPTION
         "Information describing the activity of the discovery mechanism
         of a PCE discovered.  "
      INDEX { pceDiscoveryIndex }
      ::= { pceDiscActivityTable 1 }

   PceDiscActivityEntry ::= SEQUENCE {
      pceDiscActivityTlvReceived Integer32,
      pceDiscActivityErroredTlvReceived Integer32,
      pceDiscActivityErroredTlvLastMinutePercentage Integer32,
      pceDiscActivityErroredTlvRisingThreshold Integer32
      }

   pceDiscActivityTlvReceived OBJECT-TYPE
      SYNTAX Integer32 (1..2147483647)
      MAX-ACCESS read-only
      STATUS current
      DESCRIPTION
         "This object counts the number of information elements received
         since the discovery of the PCE."
      ::= { pceDiscActivityEntry 1 }

   pceDiscActivityErroredTlvReceived OBJECT-TYPE
      SYNTAX Integer32 (1..2147483647)
      MAX-ACCESS read-only
      STATUS current
      DESCRIPTION
         "This object counts the number of Errored information elements
         received since the discovery of the PCE."
      ::= { pceDiscActivityEntry 2 }

   pceDiscActivityErroredTlvLastMinutePercentage OBJECT-TYPE
      SYNTAX Integer32 (0..100)





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      MAX-ACCESS read-only
      STATUS current
      DESCRIPTION
         "This object reports the percentage of the errored information
         elements received over a one-minute average."
      ::= { pceDiscActivityEntry 3 }

   pceDiscActivityErroredTlvRisingThreshold OBJECT-TYPE
      SYNTAX Integer32 (0..100)
      MAX-ACCESS read-write
      STATUS current
      DESCRIPTION
         "This object specifies the percentage of information elements
         errors limit to be reach before triggering the sending of the
         notification 'pceDiscAbnormalErroredTlvPercentage'."
      ::= { pceDiscActivityEntry 4 }

   --

   -- Notification --

   --

   pceDiscNotAnyPceIdentified NOTIFICATION-TYPE
      OBJECTS {
         pceDiscoveryKnownPCEs
      }
      STATUS current
      DESCRIPTION
         "This notification is sent when the value of
         'pceDiscoveryKnownPCEs' decreases to zero.
         This occurs typically when, after modification of
         configuration, there is no more PCE manually declared and when
         there is no more PCE discovery sessions configured."
      ::= { pceDiscNotifications 1 }

   pceDiscAllPcesInactive NOTIFICATION-TYPE
      OBJECTS {
         pceDiscoveryKnownPCEs,
         pceDiscoveryActivePCEs
      }
      STATUS current
      DESCRIPTION
         "This notification is sent when the value of
         'pceDiscoveryActivePCEs' decreases to zero.
         This occurs when all the PCE discovery sessions come inactive.
      ::= { pceDiscNotifications 1 }




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   pceDiscAbnormalErroredTlvPercentage NOTIFICATION-TYPE
      OBJECTS {
         pceDiscoveryIndex,
         pceDiscActivityErroredTlvLastMinutePercentage,
         pceDiscActivityErroredTlvRisingThreshold
      }
      STATUS current
      DESCRIPTION
         "This notification is sent when the value of
         'pceDiscActivityErroredTlvLastMinutePercentage' rises over the
         value of pceDiscActivityErroredTlvRisingThreshold."
      ::= { pceDiscNotifications 3 }

   --

   -- PCE DISC agents conformance statement

   --

   pceDiscConformance OBJECT IDENTIFIER ::= { pceDiscStdMIB 2 }

   pceDiscGroups OBJECT IDENTIFIER ::= { pceDiscConformance 1 }

   pceDiscCompliances OBJECT IDENTIFIER ::= { pceDiscConformance 2 }

   -- PCE DISC agent compliance statements

   pceDiscGeneralPceInformation MODULE-COMPLIANCE
      STATUS current
      DESCRIPTION
      "The compliance statement for SNMP entities that implement only
      general information monitoring as proposed in the 2nd S. of the
      section 6.1 of [RFC4674]."
      MODULE
      --
      -- objets of pceDiscoveryTable
      -- objects of pceDiscPathScopeTable
      --
   ::= { pceDiscCompliances 1 }

   pceDiscDetailledPceInformation MODULE-COMPLIANCE
      STATUS current
      DESCRIPTION
      "The compliance statement for SNMP entities that implement
      detailled monitoring as proposed in the 3rd S. of the section 6.1
      of [RFC4674]."





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      MODULE
      --
      -- objets of pceDiscoveryTable;
      -- objects of pceDiscPathScopeTable;
      -- objects of pceDiscDomainTable;
      -- objects of pceDiscDestDomainTable
      --
   ::= { pceDiscCompliances 2 }

   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 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  on/off of discovery : Unauthorized changes to
      pceDiscoveryAdminStatus could result in a temporary interruption
      of the discovery ;

   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  IP addresses of PCE.

   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



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   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

   .


11.  References

11.1.  Normative References

   [I-D.ietf-pce-disco-proto-isis]
              Roux, J., "IS-IS protocol extensions for Path Computation
              Element (PCE) Discovery",
              draft-ietf-pce-disco-proto-isis-02 (work in progress),
              February 2007.

   [I-D.ietf-pce-disco-proto-ospf]
              Roux, J., "OSPF protocol extensions for Path Computation
              Element (PCE) Discovery",
              draft-ietf-pce-disco-proto-ospf-02 (work in progress),
              February 2007.

   [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.

   [RFC4674]  Le Roux, J., "Requirements for Path Computation Element
              (PCE) Discovery", RFC 4674, October 2006.







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11.2.  Informative References

   [RFC0768]  Postel, J., "User Datagram Protocol", STD 6, RFC 768,
              August 1980.

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

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

   [RFC3418]  Presuhn, R., "Management Information Base (MIB) for the
              Simple Network Management Protocol (SNMP)", STD 62,
              RFC 3418, December 2002.

   [RFC4655]  Farrel, A., Vasseur, J., and J. Ash, "A Path Computation
              Element (PCE)-Based Architecture", RFC 4655, August 2006.


Appendix A.  Open Issues

   This list of open issues should be cleared and removed before this
   document hits the IESG.


Author's Address

   Stephan Emile
   France Telecom
   2 avenue Pierre Marzin
   Lannion,   F-22307

   Fax:   +33 2 96 05 18 52
   Email: emile.stephan@orange-ftgroup.com
















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Full Copyright Statement

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   Administrative Support Activity (IASA).





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