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Versions: 00 01 02                                                      
INTERNET DRAFT                                                B. Coutts
<draft-ietf-frnetmib-spvc-02.txt>            Ascend Communications Inc.
                                                      November 13, 1998
                                                   Expires May 13, 1999



                      Frame Relay Switched PVC MIB



1.  Status of this Memo

   This document is an Internet-Draft.  Internet-Drafts are working
   documents of the Internet Engineering Task Force (IETF), its areas,
   and its working groups.  Note that other groups may also distribute
   working documents as Internet-Drafts.

   Internet-Drafts are draft documents valid for a maximum of six
   months.  Internet-Drafts may be updated, replaced, or obsoleted by
   other documents at any time.  It is not appropriate to use Internet-
   Drafts as reference material or to cite them other than as a
   ``working draft'' or ``work in progress.''

   To learn the current status of any Internet-Draft, please check the
   ``1id-abstracts.txt'' listing contained in the Internet-Drafts Shadow
   Directories on ftp.ietf.org (US East Coast), nic.nordu.net
   (Europe), ftp.isi.edu (US West Coast), or munnari.oz.au (Pacific
   Rim).

   This draft document will be submitted to the RFC editor as a stand-
   alone SNMP MIB.  Please send comments to the author, copying frs-
   mib@newbridge.com.  It expires May 1999.

2.  Abstract

   This memo defines a portion of the Management Information Base (MIB)
   for use with network management protocols in TCP/IP- based internets.
   In particular, it defines objects for managing Frame Relay Switched
   Permanent Virtual Circuits (SPVCs).  This memo does not specify a
   standard for the Internet community.

3.  The SNMPv2 Network Management Framework

   The major components of the SNMPv2 Network Management framework are
   described in the documents listed below.

   o    RFC 1902 [2] defines the Structure of Management



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        Information (SMI), the mechanisms used for describing and
        naming objects for the purpose of management.

   o    STD 17, RFC 1213 [3] defines MIB-II, the core set of
        managed objects (MO) for the Internet suite of protocols.

   o    RFC 1905 [4] defines the protocol used for network access
        to managed objects.

   o    RFC 1604 [1] defines the protocol used for managing
        Frame Relay services.

   The framework is adaptable/extensible by defining new MIBs to suit
   the requirements of specific applications/protocols/situations.

   Managed objects are accessed via a virtual information store, the
   MIB.  Objects  in  the  MIB  are  defined  using the subset of
   Abstract Syntax Notation One (ASN.1) defined in the SMI. In
   particular, each object type is named by an OBJECT IDENTIFIER, which
   is an administratively assigned name. The object  type  together
   with  an  object  instance  serves  to uniquely  identify  a
   specific  instantiation  of the object.  For human convenience, often
   a textual string, termed the descriptor, is  used  to refer to the
   object type.

4.  Overview

   This MIB addresses the instances needed to manage the Frame Relay
   Forum's Implementation Agreement for SPVCs (FRF.10).  These instances
   are based on the ATM Forum Soft PVC MIB [5] objects to provide a
   consistent Switched PVC management model for both ATM and Frame Relay
   SPVCs.

   A Switched PVC (SPVC) is a virtual circuit that appears to the user
   to be a PVC but spans multiple networks as an SVC.  The originating
   network "ingress" endpoint is configured as one PVC endpoint and is
   configured with information (including a destination address)
   required to signal and establish an SVC across the NNI interfaces
   between networks.  The destination network "egress" endpoint is
   configured as the second PVC endpoint and is configured with the
   destination address.  The originating endpoint has the responsibility
   for establishing, releasing, and re-establishing the SPVC.

4.1. Originating Endpoint

   In order to configure the originating endpoint SPVC parameters, an
   entry in the PVC End-Point table and an entry in the Switched PVC
   table must be defined.  The PVC End-Point table entry (see the PVC



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   End-Point Group in RFC 1604 [1]) identifies the bi-directional
   traffic parameters for the originating endpoint of the SPVC.  The
   Switched PVC table entry (defined in this SPVC MIB) identifies the
   destination address information (e.g., E.164 address) of the SPVC.
   Together these two entries provide the information required (by the
   network originating the SPVC) to signal an SVC across the NNI.

   A row in the PVC End-Point table must be created prior to creating a
   row in the Switched PVC table.  And the corresponding row in the PVC
   End-Point table must be active prior to activating the Switched PVC
   table row.  When the Switched PVC table row is made active, an
   attempt is made to set up a switched connection to an interface at
   the destination switch.

   Presently, the Frame Relay Service MIB (RFC 1604 [1]) does not
   include an SVC cross-connect table.  Once such a table is defined, an
   SVC cross-connect table entry should be created at the time the SPVC
   table row is made active;  and deleted at the time the SPVC table row
   is made inactive.

4.2. Terminating Endpoint

   The Switched PVC Address Table (defined in this SPVC MIB) is used to
   configure one or more addresses for each SPVC terminating endpoint
   interface.

   In order to configure the terminating endpoint PVC parameters (e.g.,
   terminating endpoint DLCI), an entry in the PVC End-Point table (see
   the PVC End-Point Group in RFC 1604 [1]) may be defined prior to the
   arrival of the Setup request.

4.3. Asymmetric and Symmetric SPVC Establishment

   The configuration of an originating SPVC endpoint and a terminating
   SPVC endpoint defines an "asymmetric" SPVC:  only one of the two SPVC
   endpoints has the capability to originate the SPVC.  FRF.10 also
   requires the capability to originate the SPVC from both of the SPVC
   endpoints ("symmetric" SPVC establishment).

   Configuration of the symmetric SPVC establishment case is
   accomplished by provisioning two asymmetric configurations (with the
   roles of originating endpoint and terminating endpoint reversed for
   one of the configurations).  The MIB defined herein will highlight
   differences between the asymmetric and symmetric cases where
   necessary.

   See FRF.10 for symmetric establishment procedures including handling
   of "call collisions".  For instance, FRF.10 indicates that only the



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   "specificDlci" or "specificSpvcCorrelator" target select type may be
   used for symmetric establishment.  (This is because the call
   collision would not be detectable for the "anyDlci" target select
   type.)

4.4. FR/ATM SPVC Interworking

   This SPVC MIB also includes objects for performing FR/ATM service
   interworking.  The originating network "ingress" FR endpoint defined
   in this MIB can select an ATM VPI/VCI for the target destination.
   The originating endpoint can also select whether multiprotocol
   encapsulation translation between RFC 1490 and RFC 1483 is required.







































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5.  Definitions

   FR-SWITCHED-PVC-MIB DEFINITIONS ::= BEGIN

   IMPORTS
           MODULE-IDENTITY, OBJECT-TYPE, Gauge32,
           Integer32                               FROM SNMPv2-SMI
           TEXTUAL-CONVENTION, NOTIFICATION-TYPE,
           TruthValue, TimeStamp, RowStatus        FROM SNMPv2-TC
           OBJECT-GROUP                            FROM SNMPv2-CONF
           ifIndex                                 FROM RFC-1213

   frSwitchedPvcMIB MODULE-IDENTITY
           LAST-UPDATED            "9003010000Z"
           ORGANIZATION            "IETF TBD Working Group"
           CONTACT-INFO
                   "Bill Coutts
                    Ascend Communications Inc.
                    1 Robbins Road
                    Westford, MA 01886 USA

                    Tel: 1-978-952-1516
                    Fax: 1-978-392-2075
                    E-mail: bill.coutts@ascend.com."

   frSwitchedPvcMIBObjects OBJECT IDENTIFIER ::= { frSwitchedPvcMIB 1 }
   frSwitchedPvcMIBTraps   OBJECT IDENTIFIER ::= { frSwitchedPvcMIB 2 }

   FrSwitchedPvcAddrPlan ::= TEXTUAL-CONVENTION
           STATUS  current
           DESCRIPTION
                   "The number plan for an SPVC address."
           SYNTAX  INTEGER {
                   other(1),
                   e164(2),
                   x121(3),
                   none(4),
                   nsap(5)   -- NSAP format
           }

   FrSwitchedPvcAddr ::= TEXTUAL-CONVENTION
           STATUS  current
           DESCRIPTION
                   "The FR SPVC address used by the network entity.
                    The number of octets are dependent on the address plan:
                    none (0 octets),
                    other, E.164, and X.121 (8 octets) - these are
                      BCD encoded;  leading 0 semi-octets and a single



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                      trailing semi-octet of 'F' are used.
                    NSAP (20 octets) - binary encoded."
           SYNTAX  OCTET STRING (SIZE(0|8|20))

   --
   -- Switched PVC
   --
   --
   -- A Switched PVC (SPVC) is a virtual circuit that appears to the user to be a
   -- PVC but spans multiple networks as an SVC.
   -- The PVC End-Point table entry (see the PVC End-Point Group in RFC 1604)
   -- identifies the bi-directional traffic parameters for the originating endpoint
   -- of the SPVC;  and the Switched PVC table entry (of this Switched PVC MIB)
   -- identifies the target (destination) address information (e.g., E.164 address)
   -- of the SPVC.  Together these two entries provide the information required
   -- (by the network originating the SPVC) to signal an SVC across the NNI.
   --
   -- To create and activate an SPVC at the originating endpoint, the following
   -- procedures shall be followed:
   -- 1).  Create an entry in the frPVCEndptTable (see RFC 1604).
   -- 2).  Create an entry in the frSwitchedPvcTable (in this MIB).
   -- 3).  Activate the frPVCEndptTable entry.
   -- 4).  When the corresponding row in the frSwitchedPvcTable (i.e., the rows with
   --      matching UNI/NNI logical port and matching DLCI index values) is set to
   --      'active', an attempt is made to set up a switched connection to an
   --      interface at the destination switch.

   -- The Switched PVC Address table (frSwitchedPvcAddressTable defined in this
   -- MIB) identifies the addresses assigned to the SPVC destination UNI/NNIs (the
   -- terminating endpoints).  Prior to creating and activating an SPVC at the
   -- originating endpoint (in the originating network), an entry must be created
   -- in the Switched PVC Address table in the network that terminates the SPVC.
   -- This terminating address corresponds to the target address configured in the
   -- Switched PVC table of the originating network.  At the destination, a PVC
   -- End-Point table entry may be defined.  As a result, the PVC's inactive
   -- status can be signaled across the UNI/NNI prior to the arrival of the Setup
   -- request.


   --
   -- The Frame Relay Switched PVC Table (Originating Endpoint)
   --

   frSwitchedPvcTable OBJECT-TYPE
           SYNTAX  SEQUENCE OF FrSwitchedPvcEntry
           MAX-ACCESS      not-accessible
           STATUS  current
           DESCRIPTION



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                   "The (conceptual) table used to manage Switched Permanent
                    Virtual Connections (SPVCs). The SPVC table is applicable
                    only to switches."
           ::= { frSwitchedPvcMIBObjects 1 }

   frSwitchedPvcEntry OBJECT-TYPE
           SYNTAX  FrSwitchedPvcEntry
           MAX-ACCESS      not-accessible
           STATUS  current
           DESCRIPTION
                   "Each entry in this table represents a Switched Permanent
                    Virtual Connection (SPVC) originating at a switch interface.
                    An SPVC is a VC that is :
                    - provisioned at the originating (source) interface of the
                      connection.
                    - established by signalling procedures across a network to a
                      destination interface.

                    A row in the frPVCEndptTable must be created, defining a PVC
                    endpoint on the source interface, prior to creating an
                    frSwitchedPvcEntry row.  The row in the frPVCEndptTable must
                    be active prior to activating the frSwitchedPvcEntry row. The
                    contents of this table reflect only the characteristics unique
                    to a Switched PVC. The traffic and signalling parameters are
                    defined in the PVC endpoint row for the source interface.
                    Since the Low Layer Compatibility, Called Party Subaddress,
                    and Calling Party Subaddress information elements are used to
                    carry end-to-end information, they are not used in the
                    configuration of Switched PVC. Note that the User-User
                    Information information element is used to contain the
                    frSwitchedPvcTargetIdentifier if 'specificSpvcCorrelator' is
                    selected in the frSwitchedPvcTargetSelectType.

                    When a row is made active, an attempt is made to set up a
                    switched connection to an interface at the destination switch.
                    No objects (other that frSwitchedPvcAdminStatus and
                    frSwitchedPvcRowStatus) can be set while the row is active.

                    The combination of the frSwitchedPvcIfIndex and
                    frSwitchedPvcDlciIndex specified in the index clause of this entry
                    serves to identify the PVC endpoint on the source interface.

                    In accordance with ITU-T X.76 Annex A, if the
                    frSwitchedPvcTargetSelectType is provisioned for either
                    'specificDlci' or 'specificSpvcCorrelator', SPVC
                    establishment can be attempted from either one or both
                    endpoints. Otherwise, SPVC establishment must be
                    attempted from a single endpoint chosen through bilateral



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                    agreement - that is, the SPVC need only be provisioned at a
                    single endpoint"
           INDEX { frSwitchedPvcIfIndex, frSwitchedPvcDlciIndex }
           ::= { frSwitchedPvcTable 1 }

   FrSwitchedPvcEntry ::=
           SEQUENCE {
                   frSwitchedPvcIfIndex
                           ifIndex,
                   frSwitchedPvcDlciIndex
                           Integer32,
                   frSwitchedPvcTargetAddress
                           FrSwitchedPvcAddr,
                   frSwitchedPvcTargetAddressPlan
                           FrSwitchedPvcAddrPlan,
                   frSwitchedPvcTargetSelectType
                           INTEGER,
                   frSwitchedPvcFrTargetIdentifier
                           Integer32,
                   frSwitchedPvcAtmTargetVpi
                           INTEGER,
                   frSwitchedPvcAtmTargetVci
                           INTEGER,
                   frSwitchedPvcAtmTranslation
                           INTEGER,
                   frSwitchedPvcLastReleaseCause
                           INTEGER,
                   frSwitchedPvcLastReleaseDiagnostic
                           OCTET STRING,
                   frSwitchedPvcOperStatus
                           INTEGER,
                   frSwitchedPvcAdminStatus
                           INTEGER,
                   frSwitchedPvcRestart
                           INTEGER,
                   frSwitchedPvcRetryInterval
                           INTEGER,
                   frSwitchedPvcRetryTimer
                           INTEGER,
                   frSwitchedPvcRetryFailures
                           INTEGER,
                   frSwitchedPvcRetryLimit
                           INTEGER,
                   frSwitchedPvcLastChange
                           TimeStamp,
                   frSwitchedPvcRowStatus
                           RowStatus
                   }



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   frSwitchedPvcIfIndex OBJECT-TYPE
           SYNTAX  IfIndex
           MAX-ACCESS      not-accessible
           STATUS  current
           DESCRIPTION
                   "The value of this object is equal to MIB II's ifIndex value of
                    the UNI/NNI logical port for this PVC endpoint."
           ::= { frSwitchedPvcEntry 1 }

   frSwitchedPvcDlciIndex OBJECT-TYPE
           SYNTAX  Integer32
           MAX-ACCESS      not-accessible
           STATUS  current
           DESCRIPTION
                   "The value of this object is equal to the DLCI value for this
                    PVC endpoint."
           ::= { frSwitchedPvcEntry 2 }

   frSwitchedPvcTargetAddress OBJECT-TYPE
           SYNTAX  FrSwitchedPvcAddr
           MAX-ACCESS      read-create
           STATUS  current
           DESCRIPTION
                   "The target address of this SPVC."
           ::= { frSwitchedPvcEntry 3 }

   frSwitchedPvcTargetAddressPlan OBJECT-TYPE
           SYNTAX  FrSwitchedPvcAddrPlan
           MAX-ACCESS      read-create
           STATUS  current
           DESCRIPTION
                   "The target address plan of this SPVC."
           ::= { frSwitchedPvcEntry 4 }

   frSwitchedPvcTargetSelectType OBJECT-TYPE
           SYNTAX  INTEGER {
                   anyDlci(1),
                   specificDlci(2),
                   specificSpvcCorrelator(3),
                   anyVpiVci(4),
                   specificVpiVci(5)
           }
           MAX-ACCESS      read-create
           STATUS  current
           DESCRIPTION
                   "The 'anyDlci', 'specificDlci', and 'specificSpvcCorrelator'
                    values are used to indicate an FR target.  These values
                    indicate whether the target DLCI value or SPVC correlator is



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                    to be used at the destination.  If the value 'anyDlci' is
                    specified, the destination switch will choose the DLCI value.
                    In such a case, once the SPVC frSwitchedPvcOperStatus value is
                    'connected', the value of this object changes to 'specificDlci'
                    such that the same DLCI value will be used even if the
                    connection is subsequently torn-down and re-established.
                    The DLCI value chosen will be available for reading in
                    frSwitchedPvcTargetIdentifier.  If the value 'specificDlci' or
                    'specificSpvcCorrelator' is specified, then a value must be
                    supplied for object frSwitchedPvcTargetIdentifier
                    prior to activation of the row.  This value is then to be used
                    at the destination.

                    The 'anyVpiVci' and 'specificVpiVci' values are used to indicate
                    an ATM target (and FR/ATM interworking).  If the value
                    'anyVpiVci' is specified, the destination switch will choose the
                    VPI/VCI values.  In such  a case, once the the SPVC
                    frSwitchedPvcOperStatus value is 'connected', the value of this
                    object changes to 'specificVpiVci' such that the same VPI/VCI
                    value will be used even if the connection is subsequently
                    torn-down and re-established.  The VPI/VCI value chosen will be
                    available for reading in frSwitchedPvcAtmTargetVpi and
                    frSwitchedPvcAtmTargetVci.  If the value 'specificVpiVci' is
                    specified, then a value must be supplied for objects
                    frSwitchedPvcAtmTargetVpi and frSwitchedPvcAtmTargetVci
                    prior to activation of the row.  These values are then to be used
                    at the destination."
           DEFVAL { specificDlci }
           ::= { frSwitchedPvcEntry 5 }

   frSwitchedPvcTargetIdentifier   OBJECT-TYPE
           SYNTAX  Integer32  (0..8388607)
           MAX-ACCESS      read-create
           STATUS  current
           DESCRIPTION
                   "This object can represent either the target DLCI value or the
                    SPVC correlator value.  When the frSwitchedPvcTargetSelectType
                    is set to 'specificDlci', this object represents the DLCI value
                    of the SPVC and has a range of 16 to 8388607.  It is passed in
                    the SETUP message Frame Relay Called Party SPVC information
                    element.  When the frSwitchedPvcTargetSelectType is set to
                    'specificSpvcCorrelator', this object represents the value of the
                    specific SPVC correlator to be passed in the SETUP message
                    User-User information element."
           ::= { frSwitchedPvcEntry 6 }

   frSwitchedPvcAtmTargetVpi       OBJECT-TYPE
           SYNTAX  INTEGER  (0..4095)



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           MAX-ACCESS      read-create
           STATUS  current
           DESCRIPTION
                   "When the frSwitchedPvcTargetSelectType is set to
                    'specificVpiVci', this object represents the VPI value
                    of the SPVC target destination.  It is passed in the SETUP
                    message Frame Relay Called Party SPVC information element."
           ::= { frSwitchedPvcEntry 7 }

   frSwitchedPvcAtmTargetVci       OBJECT-TYPE
           SYNTAX  INTEGER  (0..65535)
           MAX-ACCESS      read-create
           STATUS  current
           DESCRIPTION
                   "When the frSwitchedPvcTargetSelectType is set to
                    'specificVpiVci', this object represents the VCI value
                    of the SPVC target destination.  It is passed in the SETUP
                    message Frame Relay Called Party SPVC information element."
           ::= { frSwitchedPvcEntry 8 }

   frSwitchedPvcAtmTranslation     OBJECT-TYPE
           SYNTAX  INTEGER {
                   none(1),
                   rfc1490-rfc1483(2)
                   }
           MAX-ACCESS      read-create
           STATUS  current
           DESCRIPTION
                   "When the frSwitchedPvcTargetSelectType is 'anyVpiVci' or
                    'specificVpiVci', FR/ATM interworking is indicated.  For
                    FR/ATM service interworking, the value 'rfc1490-rfc1483'
                    selects multiprotocol encapsulation translation from FR
                    RFC 1490 to ATM RFC 1483."
           ::= { frSwitchedPvcEntry 9 }

   frSwitchedPvcLastReleaseCause   OBJECT-TYPE
           SYNTAX  INTEGER(1..127)
           MAX-ACCESS      read-only
           STATUS  current
           DESCRIPTION
                   "Value of the Cause field of the Cause Information Element in
                    the last Release Signalling message received for this SPVC.
                    Indicates the reason for the Disconnect."
           ::= { frSwitchedPvcEntry 10 }

   frSwitchedPvcLastReleaseDiagnostic      OBJECT-TYPE
           SYNTAX  OCTET STRING (SIZE(0..8))
           MAX-ACCESS      read-only



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           STATUS  current
           DESCRIPTION
                   "Value of the first 8 bytes of diagnostic information from the
                    Cause field of the Cause Information Element in the last
                    Release Signalling message received for this SPVC."
           ::= { frSwitchedPvcEntry 11 }

   frSwitchedPvcOperStatus     OBJECT-TYPE
           SYNTAX  INTEGER {
                   other(1),
                   setupInProgress(2),
                   connectedAsOriginator(3),
                   connectedAsTerminator(4),
                   failed(5)
                   }
           MAX-ACCESS      read-only
           STATUS  current
           DESCRIPTION
                   "Describes the status of the SPVC. The value
                    'connectedAsOriginator' is set if this endpoint initiated
                    establishment of the connected SPVC. The value is set to
                    'connectedAsTerminator' if the other endpoint initiated
                    establishment of the connect SPVC. If the row is not active,
                    the value of this object is 'other'."
           ::= { frSwitchedPvcEntry 12 }

   frSwitchedPvcAdminStatus     OBJECT-TYPE
           SYNTAX  INTEGER {
                   up(1),
                   down(2)
                   }
           MAX-ACCESS      read-write
           STATUS  current
           DESCRIPTION
                   "Used to select the administrative state of this SPVC.  When
                    changed to 'down', the PVC is released and the
                    frSwitchedPvcOperStatus object transitions to 'failed'.  When
                    changed to 'up', the setup procedure is begun and the
                    frSwitchedPvcOperStatus object transitions to 'setupInProgress'."
           ::= { frSwitchedPvcEntry 13 }

   frSwitchedPvcRestart    OBJECT-TYPE
           SYNTAX  INTEGER {
                   restart(1),
                   noop(2)
                   }
           MAX-ACCESS      read-create
           STATUS  current



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           DESCRIPTION
                   "When the value is set to 'noop' then no action is taken;
                    otherwise, when the value is set to 'restart', the PVC is
                    released if necessary and a new setup procedure is begun. As a
                    result of this action, the frSwitchedPvcOperStatus object
                    transitions to 'setupInProgress' (either from the 'connected'
                    or 'failed' state). When read, the value 'noop' is returned."
           ::= { frSwitchedPvcEntry 14 }

   frSwitchedPvcRetryInterval      OBJECT-TYPE
           SYNTAX  INTEGER (0..3600)
           UNITS           "seconds"
           MAX-ACCESS      read-create
           STATUS  current
           DESCRIPTION
                   "Defines the period to wait (in seconds) before attempting to
                    establish the SPVC connection after the first failed call
                    attempt.  Zero represents an infinite interval indicating no
                    retries."
           DEFVAL { 0 }
           ::= { frSwitchedPvcEntry 15 }

   frSwitchedPvcRetryTimer OBJECT-TYPE
           SYNTAX  INTEGER
           UNITS           "seconds"
           MAX-ACCESS      read-only
           STATUS  current
           DESCRIPTION
                   "Indicates the current value of the retry timer (in seconds)
                    for this connection. When the value reaches zero, an attempt
                    will be made to establish the SPVC connection"
           ::= { frSwitchedPvcEntry 16 }

   frSwitchedPvcRetryFailures      OBJECT-TYPE
           SYNTAX  INTEGER
           MAX-ACCESS      read-only
           STATUS  current
           DESCRIPTION
                   "Indicates how many attempts to establish the connection have
                    failed.  This counter is reset whenever a connection is
                    successfully established or the SPVC is restarted."
           ::= { frSwitchedPvcEntry 17 }

   frSwitchedPvcRetryLimit OBJECT-TYPE
           SYNTAX  INTEGER
           MAX-ACCESS      read-create
           STATUS  current
           DESCRIPTION



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                   "Sets a maximum limit on how many consecutive unsuccessful call
                    setup attempts can be made before stopping the attempt to set
                    up the connection. If this limit is reached then management
                    action will be required to initiate a new attempt to establish
                    the connection. A value of zero indicates no limit - the
                    attempt will continue until successful."
           DEFVAL { 0 }
           ::= { frSwitchedPvcEntry 18 }

   frSwitchedPvcLastChange OBJECT-TYPE
           SYNTAX  TimeStamp
           MAX-ACCESS      read-create
           STATUS  current
           DESCRIPTION
                   "Used to indicate time of last status change."
           ::= { frSwitchedPvcEntry 19 }

   frSwitchedPvcRowStatus  OBJECT-TYPE
           SYNTAX  RowStatus
           MAX-ACCESS      read-create
           STATUS  current
           DESCRIPTION
                   "Used to create and delete an SPVC. When this object is set to
                    'active' an attempt is made to set up the SPVC. When this
                    object has the value 'active' and is set to another value, any
                    set-up or connection in-progress is released."
           ::= { frSwitchedPvcEntry 20 }


      --
      -- The Frame Relay Switched PVC Address Table (Terminating Endpoint)
      --
      --
      -- This table is used to configure one or more addresses prior to
      -- setting up Switched PVCs at an interface.  In addition, prior
      -- to setting up a Switched PVC at the originating interface, this
      -- table can be consulted to determine available addresses at the
      -- destination interface.
      --

      frSwitchedPvcAddressTable      OBJECT-TYPE
              SYNTAX  SEQUENCE OF FrSwitchedPvcAddressEntry
              MAX-ACCESS      not-accessible
              STATUS  current
              DESCRIPTION
                      "This table is used to configure addresses at an
                       interface on this node prior to accepting
                       Switched PVCs at that same interface."



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              ::= { frSwitchedPvcMIBObjects 2 }

      frSwitchedPvcAddressEntry      OBJECT-TYPE
              SYNTAX          FrSwitchedPvcAddressEntry
              MAX-ACCESS      not-accessible
              STATUS  current
              DESCRIPTION
                      "Address entry for configuring the destination
                       endpoint for a Switched PVC at an interface"
              INDEX { frSwitchedPvcAddressIfIndex, frSwitchedPvcAddressPlan,
                      frSwitchedPvcAddressAddress }
              ::= { frSwitchedPvcAddressTable 1 }

      FrSwitchedPvcAddressEntry ::=
              SEQUENCE {
                      frSwitchedPvcAddressIfIndex       ifIndex,
                      frSwitchedPvcAddressPlan          FrSwitchedPvcAddrPlan,
                      frSwitchedPvcAddressAddress       FrSwitchedPvcAddr,
                      frSwitchedPvcAddressRowStatus     RowStatus
                      }

      frSwitchedPvcIfIndex OBJECT-TYPE
              SYNTAX  IfIndex
              MAX-ACCESS      not-accessible
              STATUS  current
              DESCRIPTION
                      "The value of this object is equal to MIB II's ifIndex value of
                       the UNI/NNI logical port for this PVC endpoint."
              ::= { frSwitchedPvcAddressEntry 1 }

      frSwitchedPvcAddressPlan       OBJECT-TYPE
              SYNTAX  FrSwitchedPvcAddrPlan
              MAX-ACCESS      not-accessible
              STATUS  current
              DESCRIPTION
                      "The number plan for this SPVC destination address."
              ::= { frSwitchedPvcAddressEntry 2 }

      frSwitchedPvcAddressAddress    OBJECT-TYPE
              SYNTAX  FrSwitchedPvcAddr
              MAX-ACCESS      not-accessible
              STATUS  current
              DESCRIPTION
                      "The destination address for an SPVC."
              ::= { frSwitchedPvcAddressEntry 3 }

      frSwitchedPvcAddressRowStatus  OBJECT-TYPE
              SYNTAX  RowStatus



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              MAX-ACCESS      read-create
              STATUS  current
              DESCRIPTION
                      "Used to create and delete an SPVC address entry."
              ::= { frSwitchedPvcAddressEntry 4 }


   --
   -- Currently Failing Switched PVC table.
   --

   frCurrentlyFailingSwitchedPvcTable      OBJECT-TYPE
           SYNTAX  SEQUENCE OF FrCurrentlyFailingSwitchedPvcEntry
           MAX-ACCESS      not-accessible
           STATUS  current
           DESCRIPTION
                   "A table indicating all Switched Permanent Virtual Connections
                    (Switched PVCs) for which the frSwitchedPvcRowStatus is
                    'active' and the frSwitchedPvcOperStatus is other than
                    'connected'."
           ::= { frSwitchedPvcMIBObjects 3 }

   frCurrentlyFailingSwitchedPvcEntry      OBJECT-TYPE
           SYNTAX  FrCurrentlyFailingSwitchedPvcEntry
           MAX-ACCESS      not-accessible
           STATUS  current
           DESCRIPTION
                   "Each entry in this table represents a Switched Permanent
                    Virtual Connection (Switched PVC) for which the
                    frSwitchedPvcRowStatus is 'active' and the
                    frSwitchedPvcOperStatus is other than 'connected'."
           INDEX { ifIndex, frDlci }
           ::= { frCurrentlyFailingSwitchedPvcTable 1 }

   FrCurrentlyFailingSwitchedPvcEntry ::=
           SEQUENCE {
                   frCurrentlyFailingSwitchedPvcTimeStamp
                           TimeStamp
                   }

   frCurrentlyFailingSwitchedPvcTimeStamp  OBJECT-TYPE
           SYNTAX  TimeStamp
           MAX-ACCESS      read-only
           STATUS  current
           DESCRIPTION
                   "The time at which this Switched PVC began to fail."
           ::= { frCurrentlyFailingSwitchedPvcEntry 1 }




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   --
   -- Switched PVC MIB Definitions
   --

   frSwitchedPvcBaseGroup  OBJECT IDENTIFIER ::= { frSwitchedPvcMIBObjects 4 }

   frSwitchedPvcCallFailuresTrapEnable     OBJECT-TYPE
           SYNTAX  TruthValue
           MAX-ACCESS      read-write
           STATUS  current
           DESCRIPTION
                   "Allows the generation of traps in response to call failures."
           ::= { frSwitchedPvcBaseGroup 1 }

   frSwitchedPvcCallFailures       OBJECT-TYPE
           SYNTAX  TruthValue
           MAX-ACCESS      read-only
           STATUS  current
           DESCRIPTION
                   "The number of times a series of call attempts has failed to
                    establish a Switched PVC."
           ::= { frSwitchedPvcBaseGroup 2 }

   frSwitchedPvcCurrentlyFailingSwitchedPvcs       OBJECT-TYPE
           SYNTAX  Gauge32
           MAX-ACCESS      read-only
           STATUS  current
           DESCRIPTION
                   "The current number of Switched-PVC connections for which the
                    frSwitchedPvcOperStatus does not have the value 'connected'."
           ::= { frSwitchedPvcBaseGroup 3 }

   frSwitchedPvcNotificationInterval               OBJECT-TYPE
           SYNTAX  Integer32 (0..3600)
           UNITS   "seconds"
           MAX-ACCESS      read-write
           DESCRIPTION
                   "The minimum interval in seconds between the sending of
                    frSwitchedPvcCallFailuresTrap notifications."
           ::= { frSwitchedPvcBaseGroup 4 }


   --
   -- Switched PVC Traps
   --

   frSwitchedPvcTraps              OBJECT IDENTIFIER ::= { frSwitchedPvcMIBTraps 1 }




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   frSwitchedPvcTrapsPrefix        OBJECT IDENTIFIER ::= { frSwitchedPvcTraps 0 }

   frSwitchedPvcCallFailuresTrap   NOTIFICATION-TYPE
           OBJECTS {
                   frSwitchedPvcCallFailures,
                   frSwitchedPvcCurrentlyFailingSwitchedPvcs }
           STATUS  current
           DESCRIPTION
                   "A notification indicating that one or more series of
                    call attempts in trying to establish a Switched PVC
                    have failed since the last frSwitchedPvcCallFailuresTrap
                    was sent.  If this trap has not been sent for the last
                    frSwitchedPvcNotificationInterval, then it will be sent
                    on the next increment of frSwitchedPvcCallFailures."
           ::= { frSwitchedPvcTrapsPrefix 1 }

   END


































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6.  Acknowledgments

   Special thanks to Andy Malis and Ron Parker of Ascend
   Communications and Dave Sinicrope of IBM for their
   valuable comments.

7.  References

   [1]  Brown, T., "Definitions of Managed Objects for Frame
        Relay Service", RFC 1604, Bell Communications Research,
        March 1994.

   [2]  SNMPv2 Working Group, Case, J., McCloghrie, K., Rose, M.,
        and S. Waldbusser, "Structure of Management Information
        for Version 2 of the Simple Network Management Protocol
        (SNMPv2)", RFC 1902, January 1996.

   [3]  McCloghrie, K., and M. Rose, Editors, "Management
        Information Base for Network Management of TCP/IP-based
        internets: MIB-II", STD 17, RFC 1213, Hughes LAN Systems,
        Performance Systems International, March 1991.

   [4]  SNMPv2 Working Group, Case, J., McCloghrie, K., Rose, M.,
        and S. Waldbusser, "Protocol Operations for Version 2 of
        the Simple Network Management Protocol (SNMPv2)", RFC
        1905, January 1996.

   [5]  ATM Forum Technical Committee, "Private Network-Network
        Specification Version 1.0 Addendum (Soft PVC MIB)",
        af-pnni-0066.000, July 1996.

8.  Author's Address

   Bill Coutts
   Ascend Communications Inc.
   1 Robbins Road
   Westford, MA  01886
   USA

   Phone:  +1 978 952 1516
   Email:  bill.coutts@ascend.com










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