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MPLS Working Group                                              Chen. Li
Internet-Draft                                              Lianyuan. Li
Intended status: Standards Track                               Lu. Huang
Expires: January 09, 2014                                        Vic Liu
                                                            China Mobile
                                                               Tao. Chou
                                                           Quintin. Zhao
                                                       Huawei Technology
                                                             Emily. Chen

                                                        December 10, 2014


        Management Information Base for MPLS LDP Multi Topology
                    draft-li-mpls-ldp-mt-mib-06.txt

Abstract

   This memo defines an portion of the Management Information Base (MIB)
   for use with network management protocols in the Internet community.
   In particular, it describes a MIB module for Multi-Topology Networks
   over Multi-protocol Label Switching(MPLS) Label Switching
   Routers(LSRs).

Status of This Memo

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

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

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

   This Internet-Draft will expire on March 10, 2015.

Copyright Notice

   Copyright (c) 2013 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of



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   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
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   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

   This document may contain material from IETF Documents or IETF
   Contributions published or made publicly available before November
   10, 2008.  The person(s) controlling the copyright in some of this
   material may not have granted the IETF Trust the right to allow
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   outside the IETF Standards Process, and derivative works of it may
   not be created outside the IETF Standards Process, except to format
   it for publication as an RFC or to translate it into languages other
   than English.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  The Internet-Standard Management Framework  . . . . . . . . .   3
   3.  Overview of MPLS-LDP-MT-STD-MIB objects . . . . . . . . . . .   3
     3.1.  MPLS LDP MT Entity Table  . . . . . . . . . . . . . . . .   3
     3.2.  MPLS LDP MT Entity Statistics Table . . . . . . . . . . .   3
     3.3.  MPLS LDP MT Session Table . . . . . . . . . . . . . . . .   3
     3.4.  MPLS LDP MT In-segment Tables . . . . . . . . . . . . . .   4
     3.5.  MPLS LDP MT Out-segment Tables  . . . . . . . . . . . . .   4
     3.6.  MPLS LDP MT LSP Table . . . . . . . . . . . . . . . . . .   4
     3.7.  MPLS LDP MT Notifications . . . . . . . . . . . . . . . .   4
   4.  MPLS-LDP-MT-STD-MIB Module Definitions  . . . . . . . . . . .   4
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .  27
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  27
   7.  Normative References  . . . . . . . . . . . . . . . . . . . .  27
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  28

1.  Introduction

   There are increasing requirements to support multi-topology in MPLS
   network.  For example, service providers want to assign different
   level of service(s) to different topologies so that the service
   separation can be achieved.  It is also possible to have an in-band
   management network on top of the original MPLS topology, or maintain
   separate routing and MPLS domains for isolated multicast or IPv6
   islands within the backbone, or force a subset of an address space to
   follow a different MPLS topology for the purpose of security, QoS or
   simplified management and/or operations.



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   For a detailed overview of the multi topology, please refer to I-D
   .ietf-mpls-ldp-multi-topology.

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.  Overview of MPLS-LDP-MT-STD-MIB objects

   The following subsections describe the purpose of each of the objects
   contained in the MPLS-LDP-MT-STD-MIB.

3.1.  MPLS LDP MT Entity Table

   The mplsLdpEntityTable specified in [RFC3815] is used to configure
   information which is used by the LDP protocol to setup potential LDP
   Sessions.  The mplsLdpMtEntityTable can be considered as an extension
   to mplsLdpEntityTable to setup potential LDP MT Sessions.

   Each entry/row in this table represents a single LDP MT Entity.
   There is no maximum number of LDP MT Entities specified.  However,
   there is an mplsLdpMtEntityIndexNext object which should be retrieved
   by the command generator prior to creating an LDP MT Entity.  If the
   mplsLdpMtEntityIndexNext object is zero, this indicates that the LSR/
   LER is not able to create another LDP MT Entity at that time.

3.2.  MPLS LDP MT Entity Statistics Table

   This table provides MPLS Multi Topology performance information on a
   per-interface basis.

3.3.  MPLS LDP MT Session Table

   Since all the MT related label messages can be advertised by LDP
   Sessions in default topology, there is no need to create extra tcp
   connection for Multi Topology.






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   The mplsLdpMtSessionTable is a read-only table.  Each entry in this
   table represents an MT Session which is related to one or more LDP MT
   Entities and only one LDP Session in default topology.

3.4.  MPLS LDP MT In-segment Tables

   The mplsLdpMtInSegmentTable contains information about the MPLS Label
   Distribution Protocol Multi Topology In-Segments which exist on this
   Label Switching Router (LSR) or Label Edge Router (LER).

   The mplsLdpMtInSegmentStatsTable contains statistical information for
   LDP MT in-segments.

3.5.  MPLS LDP MT Out-segment Tables

   This table contains information about the MPLS Label Distribution
   Protocol Multi Topology Out-Segments which exist on this Label
   Switching Router (LSR) or Label Edge Router (LER).

   The mplsLdpMtInSegmentStatsTable contains statistical information for
   LDP MT out-segments.

3.6.  MPLS LDP MT LSP Table

   This table specifies MT LIB label switching information.  Entries in
   this table define LIB label switching entries associated with the
   specified FEC of the specified topology.

3.7.  MPLS LDP MT Notifications

   The mplsLdpMtLspUp and mplsLdpMtLspDown notifications are generated
   when there is an appropriate change in the mplsLdpMtLspOperStatus
   object, e.g., when the LSP changes state (Up to Down for the
   mplsLdpMtLspDown notification, or Down to Up for the mplsLdpMtLspUp
   notification).

4.  MPLS-LDP-MT-STD-MIB Module Definitions

       MPLS-LDP-MT-STD-MIB DEFINITIONS ::= BEGIN

           IMPORTS
               IndexIntegerNextFree, IndexInteger
                   FROM DIFFSERV-MIB
               InetAddress, InetAddressPrefixLength
                   FROM INET-ADDRESS-MIB
               MplsIndexType
                   FROM MPLS-LSR-STD-MIB
               MplsLdpLabelType, MplsLspType, MplsLdpIdentifier



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                   FROM MPLS-TC-STD-MIB
               OBJECT-GROUP, MODULE-COMPLIANCE, NOTIFICATION-GROUP
                   FROM SNMPv2-CONF
               transmission, TimeTicks, Integer32, Unsigned32, Counter32,
               Counter64, OBJECT-TYPE, MODULE-IDENTITY, NOTIFICATION-TYPE
                   FROM SNMPv2-SMI
               QosService     FROM INTEGRATED-SERVICES-MIB
               TimeStamp, StorageType, RowStatus
                   FROM SNMPv2-TC;


           mplsLdpMtStdMIB MODULE-IDENTITY
               LAST-UPDATED "201206131436Z"        -- June 13, 2012 at 14:36 GMT
               ORGANIZATION
                   "Multiprotocol Label Switching (mpls) Working Group"
               CONTACT-INFO
                   "Chen Li (lichenyj@chinamobile.com)
                   Lianyuan Li (lilianyuan@chinamobile.com)
                   Lu Huang (huanglu@chinamobile.com)
                   China Mobile

                   Emily Chen (emily.chenying@huawei.com)
                   Quintin Zhao (qzhao@huawei.com)
                   Huawei Technologies"
               DESCRIPTION
                   "This MIB contains managed object definitions for the
                   'Multiprotocol Label Switching, Label Distribution Protocol,
                    Multi Topology'document."
               ::= { mplsStdMIB 1 }




   --
   -- Node definitions
   --

   --  1.3.6.1.2.1.10.1.1
           mplsStdMIB OBJECT IDENTIFIER ::= { transmission 166 }


           mplsLdpMtNotifications OBJECT IDENTIFIER ::= { mplsLdpMtStdMIB 0 }


           mplsLdpMtLspUp NOTIFICATION-TYPE
               OBJECTS { mplsLdpMtLspOperStatus,   -- start of range
                     mplsLdpMtLspOperStatus    -- end of range
               }



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               STATUS current
               DESCRIPTION
                   "This notification is generated when the
                   mplsLdpMtLspOperStatus object for one or more contiguous
                   entries in mplsLdpMtLspTable are about to enter the up(1)
                   state from some other state. The included values of
                   mplsLdpMtLspOperStatus MUST both be set equal to this new
                   state (i.e: up(1)). The two instances of
                   mplsLdpMtLspOperStatus in this notification indicate the range
                   of indexes that are affected.  Note that all the indexes of
                   the two ends of the range can be derived from the instance
                   identifiers of these two objects. For cases where a contiguous
                   range of cross-connects have transitioned into the up(1) state
                   at roughly the same time, the device SHOULD issue a single
                   notification for each range of contiguous indexes in an effort
                   to minimize the emission of a large number of notifications.
                   If a notification has to be issued for just a single
                   cross-connect entry, then the instance identifier (and values)
                   of the two mplsLdpMtLspOperStatus objects MUST be the identical."
               ::= { mplsLdpMtNotifications 1 }


           mplsLdpMtLspDown NOTIFICATION-TYPE
               OBJECTS { mplsLdpMtLspOperStatus,   -- start of range
                     mplsLdpMtLspOperStatus    -- end of range
               }
               STATUS current
               DESCRIPTION
                   "This notification is generated when the
                   mplsLdpMtLspOperStatus object for one or more contiguous
                   entries in mplsLdpMtLspTable are about to enter the down(2)
                   state from some other state. The included values of
                   mplsLdpMtLspOperStatus MUST both be set equal to this down(2)
                   state.  The two instances of mplsLdpMtLspOperStatus in this
                   notification indicate the range of indexes that are affected.
                   Note that all the indexes of the two ends of the range can be
                 derived from the instance identifiers of these two objects.
                 For cases where a contiguous range of cross-connects have
                 transitioned into the down(2) state at roughly the same time,
                 the device SHOULD issue a single notification for each range
                 of contiguous indexes in an effort to minimize the emission of
                 a large number of notifications.  If a notification has to be
                   issued for just a single cross-connect entry, then the
                   instance identifier (and values) of the two
                   mplsLdpMtLspOperStatus objects MUST be identical."
               ::= { mplsLdpMtNotifications 2 }





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           mplsLdpMtObjects OBJECT IDENTIFIER ::= { mplsLdpMtStdMIB 1 }


           mplsLdpMtEntityObjects OBJECT IDENTIFIER ::= { mplsLdpMtObjects 1 }


           mplsLpMtEntityLastChange OBJECT-TYPE
               SYNTAX TimeStamp
               MAX-ACCESS read-only
               STATUS current
               DESCRIPTION
                   "The value of sysUpTime at the time of the most
                   recent addition or deletion of an entry
                   to/from the mplsLdpMtEntityTable, or
                   the most recent change in value of any objects in the
                   mplsLdpMtEntityTable.

                   If no such changes have occurred since the last
                   re-initialization of the local management subsystem,
                   then this object contains a zero value."
               ::= { mplsLdpMtEntityObjects 1 }


           mplsLdpMtEntityIndexNext OBJECT-TYPE
               SYNTAX IndexIntegerNextFree
               MAX-ACCESS read-only
               STATUS current
               DESCRIPTION
                   "This object contains an appropriate value to
                   be used for mplsLdpEntityIndex when creating
                   entries in the mplsLdpEntityTable. The value
                   0 indicates that no unassigned entries are
                   available."
               ::= { mplsLdpMtEntityObjects 2 }


   -- mplsLdpMtEntityTable
           mplsLdpMtEntityTable OBJECT-TYPE
               SYNTAX SEQUENCE OF MplsLdpMtEntityEntry
                        MAX-ACCESS not-accessible
               STATUS current
               DESCRIPTION
                   "This table contains information about the
                   MPLS Label Distribution Protocol Multi Topology
                   Entities which exist on this Label Switching
                   Router (LSR) or Label Edge Router (LER)."
               ::= { mplsLdpMtEntityObjects 3 }




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           mplsLdpMtEntityEntry OBJECT-TYPE
               SYNTAX MplsLdpMtEntityEntry
                        MAX-ACCESS not-accessible
               STATUS current
               DESCRIPTION
                   "An entry in this table represents an LDP MT entity.
                   An entry can be created by a network administrator
                   or by an SNMP agent as instructed by LDP."
               INDEX { mplsLdpMtEntityLdpId, mplsLdpMtEntityMtId,
               mplsLdpMtEntityIndex }
               ::= { mplsLdpMtEntityTable 1 }


           MplsLdpMtEntityEntry ::=
               SEQUENCE {
                   mplsLdpMtEntityLdpId
                       MplsLdpIdentifier,
                   mplsLdpMtEntityMtId
                       Unsigned32,
                   mplsLdpMtEntityIndex
                       IndexInteger,
                   mplsLdpMtEntityAdminStatus
                       INTEGER,
                   mplsLdpMtEntityStorageType
                       StorageType,
                   mplsLdpMtEntityRowStatus
                       RowStatus
                }

           mplsLdpMtEntityLdpId OBJECT-TYPE
               SYNTAX MplsLdpIdentifier
                        MAX-ACCESS not-accessible
               STATUS current
               DESCRIPTION
                   "The LDP identifier."
               REFERENCE
                   "RFC 5036, LDP Specification, Section on LDP Identifiers."
               ::= { mplsLdpMtEntityEntry 1 }


           mplsLdpMtEntityMtId OBJECT-TYPE
               SYNTAX Unsigned32 (0..65535)
                        MAX-ACCESS read-create
               STATUS current
               DESCRIPTION
                   "The Multi Topology identifier of this LDP MT Entity."
               REFERENCE
                   "draft-ietf-mpls-ldp-multi-topology, LDP Extensions for Multi



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                   Topology Routing, Section on Multi-Topology ID."
               ::= { mplsLdpMtEntityEntry 2 }


           mplsLdpMtEntityIndex OBJECT-TYPE
               SYNTAX IndexInteger
                        MAX-ACCESS not-accessible
               STATUS current
               DESCRIPTION
                   "This index is used as a secondary index to uniquely identify
                   this row.  Before creating a row in this table, the
                   'mplsLdpMtEntityIndexNext' object should be retrieved.  That
                   value should be used for the value of this index when creating
                   a row in this table.  NOTE: if a value of zero (0) is
                   retrieved, that indicates that no rows can be created in this
                   table at this time."
               ::= { mplsLdpMtEntityEntry 3 }


           mplsLdpMtEntityAdminStatus OBJECT-TYPE
               SYNTAX INTEGER
                   {
                   enable(1),
                   disable(2)
                   }
                        MAX-ACCESS read-create
               STATUS current
               DESCRIPTION
                   "The administrative status of this LDP MT Entity.  If this
                   object is changed from 'enable' to 'disable' and this entity
                   has already attempted to establish contact with a MT Session,
                   then all contact with that MT Session is lost and all
                   information from that MT Session needs to be removed from the
                   MIB.  (This implies that the network management subsystem
                   should clean up any related entry in the
                   mplsLdpMtSessionTable.).  At this point the operator is able
                   to change values which are related to this entity.  When the
                   admin status is set back to 'enable', then this MT Entity will
                   attempt to establish a new MT Session."
               DEFVAL { enable }
               ::= { mplsLdpMtEntityEntry 4 }


           mplsLdpMtEntityStorageType OBJECT-TYPE
               SYNTAX StorageType
                        MAX-ACCESS read-create
               STATUS current
               DESCRIPTION



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                   "The storage type for this conceptual row.  Conceptual rows
                   having the value 'permanent(4)' need not allow write-access
                   to any columnar objects in the row."
               ::= { mplsLdpMtEntityEntry 5 }


           mplsLdpMtEntityRowStatus OBJECT-TYPE
               SYNTAX RowStatus
                        MAX-ACCESS read-create
               STATUS current
               DESCRIPTION
                   "The status of this conceptual row.  All writable objects in
                   this row may be modified at any time, however, as described
                   in detail in the section entitled, 'Changing Values After
                   Session Establishment', and again described in the DESCRIPTION
                   clause of the mplsLdpMtEntityAdminStatus object, if a session
                   has been initiated with a Peer, changing objects in this table
                   will wreak havoc with the session and interrupt traffic.  To
                   repeat again: the recommended procedure is to set the
                   mplsLdpMtEntityAdminStatus to down, thereby explicitly causing
                   a session to be torn down.  Then, change objects in this entry,
                   then set the mplsLdpMtEntityAdminStatus to enable, which enables
                   a new session to be initiated."
               ::= { mplsLdpMtEntityEntry 6 }


   -- mplsLdpMtEntityStatsTable
           mplsLdpMtEntityStatsTable OBJECT-TYPE
               SYNTAX SEQUENCE OF MplsLdpMtEntityStatsEntry
                        MAX-ACCESS not-accessible
               STATUS current
               DESCRIPTION
                   "This table contains statistical information for
                   LDP MT entities to an LSR."
               ::= { mplsLdpMtEntityObjects 4 }


           mplsLdpMtEntityStatsEntry OBJECT-TYPE
               SYNTAX MplsLdpMtEntityStatsEntry
                        MAX-ACCESS not-accessible
               STATUS current
               DESCRIPTION
                   "An entry in this table is created by the LSR for every
                   interface capable of supporting MPLS LDP Multi Topology.
                   It is an extension to the mplsLdpMtEntityEntry table.
                   Note that the discontinuity behavior of entries in this table
                   MUST be based on the corresponding
                   ifEntry's ifDiscontinuityTime."



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               AUGMENTS { mplsLdpMtEntityEntry }
               ::= { mplsLdpMtEntityStatsTable 1 }


           MplsLdpMtEntityStatsEntry ::=
               SEQUENCE {
                   mplsLdpMtEntityStatsOctets
                       Counter32,
                   mplsLdpMtEntityStatsPackets
                       Counter32,
                   mplsLdpMtEntityStatsErrors
                       Counter32,
                   mplsLdpMtEntityStatsDiscards
                       Counter32,
                   mplsLdpMtEntityStatsHCOctets
                       Counter64,
                   mplsLdpMtEntityStatsDiscontinuityTime
                       TimeTicks
                }

           mplsLdpMtEntityStatsOctets OBJECT-TYPE
               SYNTAX Counter32
               MAX-ACCESS read-only
               STATUS current
               DESCRIPTION
                   "This value represents the total number of octets received
                   by this MT interface. It MUST be equal to the least
                   significant 32 bits of mplsLdpMtEntityStatsHCOctets if
                   mplsLdpMtEntityStatsHCOctets is supported according to
                   the rules spelled out in RFC2863."
               ::= { mplsLdpMtEntityStatsEntry 1 }


           mplsLdpMtEntityStatsPackets OBJECT-TYPE
               SYNTAX Counter32
               MAX-ACCESS read-only
               STATUS current
               DESCRIPTION
                   "Total number of packets received by this MT interface."
               ::= { mplsLdpMtEntityStatsEntry 2 }


           mplsLdpMtEntityStatsErrors OBJECT-TYPE
               SYNTAX Counter32
               MAX-ACCESS read-only
               STATUS current
               DESCRIPTION
                   "The number of error packets received on this MT interface."



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               ::= { mplsLdpMtEntityStatsEntry 3 }


           mplsLdpMtEntityStatsDiscards OBJECT-TYPE
               SYNTAX Counter32
               MAX-ACCESS read-only
               STATUS current
               DESCRIPTION
                   "The number of labeled packets received on this MT interface,
                   which were chosen to be discarded even though no errors had
                   been detected to prevent their being transmitted.
                   One possible reason for discarding such a labeled packet
                   could be to free up buffer space."
               ::= { mplsLdpMtEntityStatsEntry 4 }


           mplsLdpMtEntityStatsHCOctets OBJECT-TYPE
               SYNTAX Counter64
               MAX-ACCESS read-only
               STATUS current
               DESCRIPTION
                   "The total number of octets received. This is the 64 bit
                   version of mplsLdpMtEntityStatsOctets, if
                   mplsLdpMtEntityStatsHCOctets is supported according to the
                   rules spelled out in RFC2863."
               ::= { mplsLdpMtEntityStatsEntry 5 }


           mplsLdpMtEntityStatsDiscontinuityTime OBJECT-TYPE
               SYNTAX TimeTicks
               MAX-ACCESS read-only
               STATUS current
               DESCRIPTION
                   "The value of sysUpTime on the most recent occasion at which
                   any one or more of this MT interface's Counter32 or Counter64
                   suffered a discontinuity. If no such discontinuities have
                   occurred since the last re-initialization of the local
                   management subsystem, then this object contains a zero value."
               ::= { mplsLdpMtEntityStatsEntry 6 }


           mplsLdpMtSessionObjects OBJECT IDENTIFIER
           ::= { mplsLdpMtObjects 2 }


           mplsLdpMtSessionLastChange OBJECT-TYPE
               SYNTAX TimeStamp
               MAX-ACCESS read-only



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               STATUS current
               DESCRIPTION
                   "The value of sysUpTime at the time of the most
                   recent addition or deletion to/from the
                   mplsLdpMtSessionTable."
               ::= { mplsLdpMtSessionObjects 1 }


   -- mplsLdpMtSessionTable
           mplsLdpMtSessionTable OBJECT-TYPE
               SYNTAX SEQUENCE OF MplsLdpMtSessionEntry
                        MAX-ACCESS not-accessible
               STATUS current
               DESCRIPTION
                   "A table of MT Sessions between the LDP MT Entities.  Each row
                   in this table represents a single MT session."
               ::= { mplsLdpMtSessionObjects 2 }


           mplsLdpMtSessionEntry OBJECT-TYPE
               SYNTAX MplsLdpMtSessionEntry
                        MAX-ACCESS not-accessible
               STATUS current
               DESCRIPTION
                   "An entry in this table represents information on a single MT
                   session.  The information contained in a row is read-only."
               INDEX { mplsLdpMtEntityLdpId, mplsLdpMtEntityMtId,
               mplsLdpMtEntityIndex, mplsLdpMtSessionPeerId }
               ::= { mplsLdpMtSessionTable 1 }


           MplsLdpMtSessionEntry ::=
               SEQUENCE {
                   mplsLdpMtSessionPeerId
                       MplsLdpIdentifier,
                   mplsLdpMtSessionState
                       INTEGER,
                   mplsLdpMtSessionStateLastChange
                       TimeStamp
                }

           mplsLdpMtSessionPeerId OBJECT-TYPE
               SYNTAX MplsLdpIdentifier
                        MAX-ACCESS not-accessible
               STATUS current
               DESCRIPTION
                   "The LDP identifier of this LDP MT Peer."
               ::= { mplsLdpMtSessionEntry 1 }



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           mplsLdpMtSessionState OBJECT-TYPE
               SYNTAX INTEGER
                   {
                   initialized(1),
                   operational(2)
                   }
               MAX-ACCESS read-only
               STATUS current
               DESCRIPTION
                   "The current state of the MT Session.  When the tcp connection
                   in default topology is established, and both ends have the
                   capability of the given MT-ID, the state can change from
                   initialized to operational."
               ::= { mplsLdpMtSessionEntry 2 }


           mplsLdpMtSessionStateLastChange OBJECT-TYPE
               SYNTAX TimeStamp
               MAX-ACCESS read-only
               STATUS current
               DESCRIPTION
                   "The value of sysUpTime at the time this MT Session was
                   created."
               ::= { mplsLdpMtSessionEntry 3 }


           mplsLdpMtLspObjects OBJECT IDENTIFIER ::= { mplsLdpMtObjects 3 }


   -- mplsLdpMtInSegmentTable
           mplsLdpMtInSegmentTable OBJECT-TYPE
               SYNTAX SEQUENCE OF MplsLdpMtInSegmentEntry
                        MAX-ACCESS not-accessible
               STATUS current
               DESCRIPTION
                   "This table contains information about the MPLS Label
                   Distribution Protocol Multi Topology
                   In-Segments which exist on this Label Switching Router (LSR)
                   or Label Edge Router (LER)."
               ::= { mplsLdpMtLspObjects 1 }


           mplsLdpMtInSegmentEntry OBJECT-TYPE
               SYNTAX MplsLdpMtInSegmentEntry
                        MAX-ACCESS not-accessible
               STATUS current
               DESCRIPTION
                   "An entry in this table represents information on a single



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                   LDP MT LSP which is represented by a MT session's index
                   combination (mplsLdpMtEntityLdpId, mplsLdpMtEntityMtId,
                   mplsLdpMtEntityIndex, mplsLdpMtSessionPeerId).

                   The information contained in a row is read-only."
               INDEX { mplsLdpMtEntityLdpId, mplsLdpMtEntityMtId,
               mplsLdpMtEntityIndex, mplsLdpMtSessionPeerId }
               ::= { mplsLdpMtInSegmentTable 1 }


           MplsLdpMtInSegmentEntry ::=
               SEQUENCE {
                   mplsLdpMtInSegmentIndex
                       MplsIndexType,
                   mplsLdpMtInSegmentLabelType
                       MplsLdpLabelType,
                   mplsLdpMtInSegmentLspType
                       MplsLspType
                }

           mplsLdpMtInSegmentIndex OBJECT-TYPE
               SYNTAX MplsIndexType
               MAX-ACCESS read-only
               STATUS current
               DESCRIPTION
                   "The index for this MT in-segment. The string containing
                   the single octet 0x00 MUST not be used as an index."
               ::= { mplsLdpMtInSegmentEntry 1 }


           mplsLdpMtInSegmentLabelType OBJECT-TYPE
               SYNTAX MplsLdpLabelType
               MAX-ACCESS read-only
               STATUS current
               DESCRIPTION
                   "The Layer 2 Label Type."
               ::= { mplsLdpMtInSegmentEntry 2 }


           mplsLdpMtInSegmentLspType OBJECT-TYPE
               SYNTAX MplsLspType
               MAX-ACCESS read-only
               STATUS current
               DESCRIPTION
                   "The type of LSP connection."
               ::= { mplsLdpMtInSegmentEntry 3 }





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   -- mplsLdpMtInSegmentStatsTable
           mplsLdpMtInSegmentStatsTable OBJECT-TYPE
               SYNTAX SEQUENCE OF MplsLdpMtInSegmentStatsEntry
                        MAX-ACCESS not-accessible
               STATUS current
               DESCRIPTION
                   "This table contains statistical information for LDP MT
                   in-segments to an LSR."
               ::= { mplsLdpMtLspObjects 2 }


           mplsLdpMtInSegmentStatsEntry OBJECT-TYPE
               SYNTAX MplsLdpMtInSegmentStatsEntry
                        MAX-ACCESS not-accessible
               STATUS current
               DESCRIPTION
                   "An entry in this table contains statistical information about
                   one incoming MT segment which is configured in the
                   mplsLdpMtInSegmentTable. The counters in this entry should
                   behave in a manner similar to that of the MT interface.
                   mplsLdpMtInSegmentStatsDiscontinuityTime indicates the time
                   of the last discontinuity in all of these objects."
               AUGMENTS { mplsLdpMtInSegmentEntry }
               ::= { mplsLdpMtInSegmentStatsTable 1 }


           MplsLdpMtInSegmentStatsEntry ::=
               SEQUENCE {
                   mplsLdpMtInSegmentStatsOctets
                       Counter32,
                   mplsLdpMtInSegmentStatsPackets
                       Counter32,
                   mplsLdpMtInSegmentStatsErrors
                       Counter32,
                   mplsLdpMtInSegmentStatsDiscards
                       Counter32,
                   mplsLdpMtInSegmentStatsHCOctets
                       Counter64,
                   mplsLdpMtInSegmentStatsDiscontinuityTime
                       TimeTicks
                }

           mplsLdpMtInSegmentStatsOctets OBJECT-TYPE
               SYNTAX Counter32
               MAX-ACCESS read-only
               STATUS current
               DESCRIPTION
                   "This value represents the total number of octets received



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                   by this MT segment. It MUST be equal to the least significant
                   32 bits of mplsLdpMtInSegmentStatsHCOctets if
                   mplsLdpMtInSegmentStatsHCOctets is supported according to
                   the rules spelled out in RFC2863."
               ::= { mplsLdpMtInSegmentStatsEntry 1 }


           mplsLdpMtInSegmentStatsPackets OBJECT-TYPE
               SYNTAX Counter32
               MAX-ACCESS read-only
               STATUS current
               DESCRIPTION
                   "Total number of packets received by this MT segment."
               ::= { mplsLdpMtInSegmentStatsEntry 2 }


           mplsLdpMtInSegmentStatsErrors OBJECT-TYPE
               SYNTAX Counter32
               MAX-ACCESS read-only
               STATUS current
               DESCRIPTION
                   "The number of error packets received on this MT segment."
               ::= { mplsLdpMtInSegmentStatsEntry 3 }


           mplsLdpMtInSegmentStatsDiscards OBJECT-TYPE
               SYNTAX Counter32
               MAX-ACCESS read-only
               STATUS current
               DESCRIPTION
                   "The number of labeled packets received on this MT in-segment,
                   which were chosen to be discarded even though no errors had
                   been detected to prevent their being transmitted.
                   One possible reason for discarding such a labeled packet
                   could be to free up buffer space."
               ::= { mplsLdpMtInSegmentStatsEntry 4 }


           mplsLdpMtInSegmentStatsHCOctets OBJECT-TYPE
               SYNTAX Counter64
               MAX-ACCESS read-only
               STATUS current
               DESCRIPTION
                   "The total number of octets received. This is the 64 bit
                   version of mplsLdpMtInSegmentStatsOctets, if
                   mplsLdpMtInSegmentStatsHCOctets is supported according to the
                   rules spelled out in RFC2863."
               ::= { mplsLdpMtInSegmentStatsEntry 5 }



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           mplsLdpMtInSegmentStatsDiscontinuityTime OBJECT-TYPE
               SYNTAX TimeTicks
               MAX-ACCESS read-only
               STATUS current
               DESCRIPTION
                   "The value of sysUpTime on the most recent occasion at which
                   any one or more of this MT segment's Counter32 or Counter64
                   suffered a discontinuity. If no such discontinuities have
                   occurred since the last re-initialization of the local
                   management subsystem, then this object contains a zero value."
               ::= { mplsLdpMtInSegmentStatsEntry 6 }


   -- mplsLdpMtOutSegmentTable
           mplsLdpMtOutSegmentTable OBJECT-TYPE
               SYNTAX SEQUENCE OF MplsLdpMtOutSegmentEntry
                        MAX-ACCESS not-accessible
               STATUS current
               DESCRIPTION
                   "This table contains information about the MPLS Label
                   Distribution Protocol Multi Topology Out-Segments which
                   exist on this Label Switching Router (LSR) or Label
                   Edge Router (LER)."
               ::= { mplsLdpMtLspObjects 3 }


           mplsLdpMtOutSegmentEntry OBJECT-TYPE
               SYNTAX MplsLdpMtOutSegmentEntry
                        MAX-ACCESS not-accessible
               STATUS current
               DESCRIPTION
                   "An entry in this table represents information on a single
                   LDP MT LSP which is represented by a MT session's index
                   combination (mplsLdpMtEntityLdpId, mplsLdpMtEntityMtId,
                   mplsLdpMtEntityIndex, mplsLdpMtSessionPeerId).

                   The information contained in a row is read-only."
               INDEX { mplsLdpMtEntityLdpId, mplsLdpMtEntityMtId,
               mplsLdpMtEntityIndex, mplsLdpMtSessionPeerId }
               ::= { mplsLdpMtOutSegmentTable 1 }


           MplsLdpMtOutSegmentEntry ::=
               SEQUENCE {
                   mplsLdpMtOutSegmentIndex
                       MplsIndexType,
                   mplsLdpMtOutSegmentLabelType
                       MplsLdpLabelType,



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                   mplsLdpMtOutSegmentLspType
                       MplsLspType
                }

           mplsLdpMtOutSegmentIndex OBJECT-TYPE
               SYNTAX MplsIndexType
               MAX-ACCESS read-only
               STATUS current
               DESCRIPTION
                   "The index for this MT out-segment. The string containing
                   the single octet 0x00 MUST not be used as an index."
               ::= { mplsLdpMtOutSegmentEntry 1 }


           mplsLdpMtOutSegmentLabelType OBJECT-TYPE
               SYNTAX MplsLdpLabelType
               MAX-ACCESS read-only
               STATUS current
               DESCRIPTION
                   "The Layer 2 Label Type."
               ::= { mplsLdpMtOutSegmentEntry 2 }


           mplsLdpMtOutSegmentLspType OBJECT-TYPE
               SYNTAX MplsLspType
               MAX-ACCESS read-only
               STATUS current
               DESCRIPTION
                   "The type of LSP connection."
               ::= { mplsLdpMtOutSegmentEntry 3 }


   -- mplsLdpMtOutSegmentStatsTable
           mplsLdpMtOutSegmentStatsTable OBJECT-TYPE
               SYNTAX SEQUENCE OF MplsLdpMtOutSegmentStatsEntry
                        MAX-ACCESS not-accessible
               STATUS current
               DESCRIPTION
                   "This table contains statistical information for LDP MT
                   out-segments to an LSR."
               ::= { mplsLdpMtLspObjects 4 }


           mplsLdpMtOutSegmentStatsEntry OBJECT-TYPE
               SYNTAX MplsLdpMtOutSegmentStatsEntry
                        MAX-ACCESS not-accessible
               STATUS current
               DESCRIPTION



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                   "An entry in this table contains statistical information
                   about one incoming MT segment which is configured in the
                   mplsLdpMtOutSegmentTable. The counters in this entry should
                   behave in a manner similar to that of the MT interface.
                   mplsLdpMtOutSegmentStatsDiscontinuityTime indicates the time
                   of the last discontinuity in all of these objects."
               AUGMENTS { mplsLdpMtOutSegmentEntry }
               ::= { mplsLdpMtOutSegmentStatsTable 1 }


           MplsLdpMtOutSegmentStatsEntry ::=
               SEQUENCE {
                   mplsLdpMtOutSegmentStatsOctets
                       Counter32,
                   mplsLdpMtOutSegmentStatsPackets
                       Counter32,
                   mplsLdpMtOutSegmentStatsErrors
                       Counter32,
                   mplsLdpMtOutSegmentStatsDiscards
                       Counter32,
                   mplsLdpMtOutSegmentStatsHCOctets
                       Counter64,
                   mplsLdpMtOutSegmentStatsDiscontinuityTime
                       TimeTicks
                }

           mplsLdpMtOutSegmentStatsOctets OBJECT-TYPE
               SYNTAX Counter32
               MAX-ACCESS read-only
               STATUS current
               DESCRIPTION
                   "This value represents the total number of octets received
                   by this MT segment. It MUST be equal to the least significant
                   32 bits of mplsLdpMtOutSegmentStatsHCOctets if
                   mplsLdpMtOutSegmentStatsHCOctets is supported according to
                   the rules spelled out in RFC2863."
               ::= { mplsLdpMtOutSegmentStatsEntry 1 }


           mplsLdpMtOutSegmentStatsPackets OBJECT-TYPE
               SYNTAX Counter32
               MAX-ACCESS read-only
               STATUS current
               DESCRIPTION
                   "Total number of packets received by this MT segment."
               ::= { mplsLdpMtOutSegmentStatsEntry 2 }





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           mplsLdpMtOutSegmentStatsErrors OBJECT-TYPE
               SYNTAX Counter32
               MAX-ACCESS read-only
               STATUS current
               DESCRIPTION
                   "The number of error packets received on this MT segment."
               ::= { mplsLdpMtOutSegmentStatsEntry 3 }


           mplsLdpMtOutSegmentStatsDiscards OBJECT-TYPE
               SYNTAX Counter32
               MAX-ACCESS read-only
               STATUS current
               DESCRIPTION
                   "The number of labeled packets received on this MT out-segment,
                    which were chosen to be discarded even though no errors had
                    been detected to prevent their being transmitted.
                    One possible reason for discarding such a labeled packet
                    could be to free up buffer space."
               ::= { mplsLdpMtOutSegmentStatsEntry 4 }


           mplsLdpMtOutSegmentStatsHCOctets OBJECT-TYPE
               SYNTAX Counter64
               MAX-ACCESS read-only
               STATUS current
               DESCRIPTION
                   "The total number of octets received. This is the 64 bit
                   version of mplsLdpMtOutSegmentStatsOctets, if
                   mplsLdpMtOutSegmentStatsHCOctets is supported according to
                   the rules spelled out in RFC2863."
               ::= { mplsLdpMtOutSegmentStatsEntry 5 }


           mplsLdpMtOutSegmentStatsDiscontinuityTime OBJECT-TYPE
               SYNTAX TimeTicks
               MAX-ACCESS read-only
               STATUS current
               DESCRIPTION
                   "The value of sysUpTime on the most recent occasion at which
                   any one or more of this MT segment's Counter32 or Counter64
                   suffered a discontinuity. If no such discontinuities have
                   occurred since the last re-initialization of the local
                   management subsystem, then this object contains a zero value."
               ::= { mplsLdpMtOutSegmentStatsEntry 6 }


           mplsLdpMtLspLastChange OBJECT-TYPE



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               SYNTAX TimeStamp
               MAX-ACCESS read-only
               STATUS current
               DESCRIPTION
                   "The value of sysUpTime at the time of the most recent addition
                   or deletion of an entry to/from the mplsLdpMtLspTable, or the
                   most recent change in value of any objects in the
                   mplsLdpMtLspTable.

                   If no such changes have occurred since the last
                   re-initialization of the local management subsystem,
                   then this object contains a zero value."
               ::= { mplsLdpMtLspObjects 5 }


           mplsLdpMtLspIndexNext OBJECT-TYPE
               SYNTAX IndexIntegerNextFree
               MAX-ACCESS read-only
               STATUS current
               DESCRIPTION
                   "This object contains an appropriate value to be used for
                   mplsLdpMtLspIndex when creating entries in the
                   mplsLdpMtLspTable. The value 0 indicates that no unassigned
                   entries are available."
               ::= { mplsLdpMtLspObjects 6 }


   -- mplsLdpMtLspTable
           mplsLdpMtLspTable OBJECT-TYPE
               SYNTAX SEQUENCE OF MplsLdpMtLspEntry
                        MAX-ACCESS not-accessible
               STATUS current
               DESCRIPTION
                   "This table specifies MT LIB label switching information.
                    Entries in this table define LIB label switching entries
                    associated with the specified topology."
               ::= { mplsLdpMtLspObjects 7 }


           mplsLdpMtLspEntry OBJECT-TYPE
               SYNTAX MplsLdpMtLspEntry
                        MAX-ACCESS not-accessible
               STATUS current
               DESCRIPTION
                   "An entry in this table is created by an LSR for every label
                   within the context of a specific topology capable of
                   supporting MT LDP LSP.The indexing provides an ordering
                   of topologies per interface."



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               INDEX { mplsLdpMtEntityLdpId, mplsLdpMtEntityMtId,
               mplsLdpMtEntityIndex, mplsLdpMtLspInSegmentIndex,
               mplsLdpMtLspOutSegmentIndex, mplsLdpMtLspIndex }
               ::= { mplsLdpMtLspTable 1 }


           MplsLdpMtLspEntry ::=
               SEQUENCE {
                   mplsLdpMtLspIndex
                       IndexInteger,
                   mplsLdpMtLspFecAddr
                       InetAddress,
                   mplsLdpMtLspFecAddrLength
                       InetAddressPrefixLength,
                   mplsLdpMtLspInSegmentIndex
                       MplsIndexType,
                   mplsLdpMtLspOutSegmentIndex
                       MplsIndexType,
                   mplsLdpMtLspRowStatus
                       Integer32,
                   mplsLdpMtLspStorageType
                       StorageType,
                   mplsLdpMtLspOperStatus
                       RowStatus,
                   mplsLdpMtLspService
                   QosService
                }

           mplsLdpMtLspIndex OBJECT-TYPE
               SYNTAX IndexInteger
               MAX-ACCESS not-accessible
               STATUS current
               DESCRIPTION
                   "The index which uniquely identifies this entry."
               ::= { mplsLdpMtLspEntry 1 }


           mplsLdpMtLspFecAddr OBJECT-TYPE
               SYNTAX InetAddress
               MAX-ACCESS read-only
               STATUS current
               DESCRIPTION
                   "The FEC address of this LDP MT LSP. Note that the
                   value of this object is interpreted as prefix address."
               REFERENCE
                   "RFC 5036, Section 3.4.1 FEC TLV."
               ::= { mplsLdpMtLspEntry 2 }




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           mplsLdpMtLspFecAddrLength OBJECT-TYPE
               SYNTAX InetAddressPrefixLength
               MAX-ACCESS read-only
               STATUS current
               DESCRIPTION
                   "The FEC prefix length of this LDP MT LSP."
               REFERENCE
                   "RFC5036, Section 3.4.1. FEC TLV"
               ::= { mplsLdpMtLspEntry 3 }


           mplsLdpMtLspInSegmentIndex OBJECT-TYPE
               SYNTAX MplsIndexType
                        MAX-ACCESS not-accessible
               STATUS current
               DESCRIPTION
                   "Index of in-segment for this LDP MT LSP."
               ::= { mplsLdpMtLspEntry 4 }


           mplsLdpMtLspOutSegmentIndex OBJECT-TYPE
               SYNTAX MplsIndexType
                        MAX-ACCESS not-accessible
               STATUS current
               DESCRIPTION
                   "Index of out-segment for this LDP MT LSP."
               ::= { mplsLdpMtLspEntry 5 }


           mplsLdpMtLspRowStatus OBJECT-TYPE
               SYNTAX Integer32
               MAX-ACCESS read-only
               STATUS current
               DESCRIPTION
                   "For creating, modifying, and deleting this row.
                   When a row in this table has a row in the active(1)
                   state, no objects in this row except this object
                   and the mplsLdpMtLspStorageType can be modified."
               ::= { mplsLdpMtLspEntry 6 }


           mplsLdpMtLspStorageType OBJECT-TYPE
               SYNTAX StorageType
               MAX-ACCESS read-only
               STATUS current
               DESCRIPTION
                   "The storage type for this conceptual row.
                   Conceptual rows having the value 'permanent(4)'



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                   need not allow write-access to any columnar
                   objects in the row."
               DEFVAL { nonVolatile }
               ::= { mplsLdpMtLspEntry 7 }


           mplsLdpMtLspOperStatus OBJECT-TYPE
               SYNTAX RowStatus
               MAX-ACCESS read-only
               STATUS current
               DESCRIPTION
                   "The status of this conceptual row.  If the value of this
                   object is 'active(1)', then none of the writable objects
                   of this entry can be modified, except to set this object
                   to 'destroy(6)'.

                   NOTE: if this row is being referenced by any entry in
                   the mplsLdpLspFecTable, then a request to destroy
                   this row, will result in an inconsistentValue error."
               ::= { mplsLdpMtLspEntry 8 }

           mplsLdpMtLspService   OBJECT-TYPE
          SYNTAX QosService
          MAX-ACCESS read-only
          STATUS current
          DESCRIPTION
            "The QoS Service  classification index for multiple
            topology LSP."
          ::= { mplsLdpMtLspEntry 9 }



           mplsLdpMtConformance OBJECT IDENTIFIER ::= { mplsLdpMtStdMIB 2 }


           mplsLdpMtGroups OBJECT IDENTIFIER ::= { mplsLdpMtConformance 1 }


           mplsLdpMtEntityGroup OBJECT-GROUP
               OBJECTS { mplsLpMtEntityLastChange, mplsLdpMtEntityIndexNext,
               mplsLdpMtEntityMtId, mplsLdpMtEntityAdminStatus,
               mplsLdpMtEntityStorageType, mplsLdpMtEntityRowStatus,
               mplsLdpMtEntityStatsDiscontinuityTime,
               mplsLdpMtEntityStatsHCOctets, mplsLdpMtEntityStatsDiscards,
               mplsLdpMtEntityStatsErrors, mplsLdpMtEntityStatsPackets,
               mplsLdpMtEntityStatsOctets }
               STATUS current
               DESCRIPTION



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                   "Objects that apply to all MPLS LDP MT Entity implementations."
               ::= { mplsLdpMtGroups 2 }


           mplsLdpMtSessionGroup OBJECT-GROUP
               OBJECTS { mplsLdpMtSessionLastChange, mplsLdpMtSessionState,
               mplsLdpMtSessionStateLastChange }
               STATUS current
               DESCRIPTION
                   "Objects that apply to all MPLS LDP MT Session implementations."
               ::= { mplsLdpMtGroups 3 }


           mplsLdpMtLspGroup OBJECT-GROUP
               OBJECTS { mplsLdpMtLspLastChange, mplsLdpMtLspIndexNext,
               mplsLdpMtLspFecAddr, mplsLdpMtLspFecAddrLength,
               mplsLdpMtLspRowStatus, mplsLdpMtLspStorageType,
               mplsLdpMtLspOperStatus, mplsLdpMtInSegmentIndex,
               mplsLdpMtInSegmentLabelType, mplsLdpMtInSegmentLspType,
               mplsLdpMtInSegmentStatsOctets, mplsLdpMtInSegmentStatsPackets,
               mplsLdpMtInSegmentStatsErrors, mplsLdpMtInSegmentStatsDiscards,
               mplsLdpMtInSegmentStatsHCOctets,
               mplsLdpMtInSegmentStatsDiscontinuityTime,
               mplsLdpMtOutSegmentIndex, mplsLdpMtOutSegmentLabelType,
               mplsLdpMtOutSegmentLspType, mplsLdpMtOutSegmentStatsOctets,
               mplsLdpMtOutSegmentStatsPackets, mplsLdpMtOutSegmentStatsErrors,
                mplsLdpMtOutSegmentStatsDiscards,
                mplsLdpMtOutSegmentStatsHCOctets,
                mplsLdpMtOutSegmentStatsDiscontinuityTime
                    }
               STATUS current
               DESCRIPTION
                   "Objects that apply to all MPLS LDP MT LSP implementations."
               ::= { mplsLdpMtGroups 4 }


           mplsLdpMtNotificationGroup NOTIFICATION-GROUP
               NOTIFICATIONS { mplsLdpMtLspUp, mplsLdpMtLspDown }
               STATUS current
               DESCRIPTION
                   "The notifications for an MPLS LDP MT implementation."
               ::= { mplsLdpMtGroups 5 }


           mplsLdpMtCompliances OBJECT IDENTIFIER ::= { mplsLdpMtConformance 2 }


           mplsLdpMtModuleFullCompliance MODULE-COMPLIANCE



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               STATUS current
               DESCRIPTION
                   "The Module is implemented with support
                   for read-create and read-write.  In other
                   words, both monitoring and configuration
                   are available when using this MODULE-COMPLIANCE."
               MODULE -- this module
                   MANDATORY-GROUPS { mplsLdpMtEntityGroup, mplsLdpMtSessionGroup,
                   mplsLdpMtLspGroup, mplsLdpMtNotificationGroup }
               ::= { mplsLdpMtCompliances 1 }


           mplsLdpMtModuleReadOnlyCompliance MODULE-COMPLIANCE
               STATUS current
               DESCRIPTION
                   "The Module is implemented with support
                   for read-only.  In other words, only monitoring
                   is available by implementing this MODULE-COMPLIANCE"
               MODULE -- this module
                   MANDATORY-GROUPS { mplsLdpMtEntityGroup, mplsLdpMtSessionGroup,
                   mplsLdpMtLspGroup, mplsLdpMtNotificationGroup }
               ::= { mplsLdpMtCompliances 2 }



       END



5.  Security Considerations

   It needs to be further identified.

6.  IANA Considerations

   There is no necessary to request new IANA code in the draft.

7.  Normative References

   [RFC3813]  Srinivasan, C., Viswanathan, A., and T. Nadeau,
              "Multiprotocol Label Switching (MPLS) Label Switching
              Router (LSR) Management Information Base (MIB)", RFC 3813,
              June 2004.








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   [RFC3814]  Nadeau, T., Srinivasan, C., and A. Viswanathan,
              "Multiprotocol Label Switching (MPLS) Forwarding
              Equivalence Class To Next Hop Label Forwarding Entry (FEC-
              To-NHLFE) Management Information Base (MIB)", RFC 3814,
              June 2004.

   [RFC3815]  Cucchiara, J., Sjostrand, H., and J. Luciani, "Definitions
              of Managed Objects for the Multiprotocol Label Switching
              (MPLS), Label Distribution Protocol (LDP)", RFC 3815, June
              2004.

   [RFC5036]  Andersson, L., Minei, I., and B. Thomas, "LDP
              Specification", RFC 5036, October 2007.

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

   [I-D.ietf-mpls-ldp-multi-topology]
              Zhao, Q., Fang, L., Zhou, C., Li, L., and K. Raza, "LDP
              Extensions for Multi Topology Routing", draft-ietf-mpls-
              ldp-multi-topology-08 (work in progress), May 2013.

Authors' Addresses

   Chen Li
   China Mobile
   Unit2, Dacheng Plaza, No. 28 Xuanwumenxi Ave, Xuanwu District
   Beijing  100053
   P.R. China

   Email: lichenyj@chinamobile.com


   Lianyuan Li
   China Mobile
   Unit2, Dacheng Plaza, No. 28 Xuanwumenxi Ave, Xuanwu District
   Beijing  100053
   P.R. China

   Email: lilianyuan@chinamobile.com










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   Lu Huang
   China Mobile
   Unit2, Dacheng Plaza, No. 28 Xuanwumenxi Ave, Xuanwu District
   Xunwu District, Beijing  100053
   China

   Email: huanglu@chinamobile.com


   Vic Liu
   China Mobile
   Unit2, Dacheng Plaza, No. 28 Xuanwumenxi Ave, Xuanwu District
   Xunwu District, Beijing  100053
   China

   Email: liuzhiheng@chinamobile.com


   Tao Chou
   Huawei Technology
   156 Beiqing Rd
   Haidian District, Beijing  100095
   China

   Email: tao.chou@huawei.com


   Quintin Zhao
   Huawei Technology
   125 Nagog Technology Park
   Acton, MA  01719
   US

   Email: quintin.zhao@huawei.com


   Emily Chen
   2717 Seville Blvd, Apt 1205
   Clearwater, FL  33764
   US

   Email: emily.chen220@gmail.com









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