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Versions: 00 01 02                                                      
IEEE 802.5 Working Group                         K.D. Lee and T. Warwick
Internet Draft DTR Concentrator MIB                         IBM and 3Com
                                                           November 1997


                 Dedicated Token Ring Concentrator MIB



   K.D. Lee,
   IBM,
   CBMA/664
   Research Triangle Park,
   NC 27709,
   USA.
   (kdlee@vnet.ibm.com)

   T. Warwick,
   3Com Europe,
   Boundary Way,
   Hemel Hempstead,
   Herts,
   United Kingdom.
   (Trevor_Warwick@3com.com)

   Filename: draft-warwick-tokenring-arch-02.txt

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 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.''

   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.is.co.za   (Africa),   nic.nordu.net
   (Europe), munnari.oz.au   (Pacific  Rim),  ds.internic.net  (US  East
   Coast),  or ftp.isi.edu (US West Coast).





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Abstract

   This document  contains  an  extract from the approved text of IEEE
   standard 802.5R ''Dedicated Token Ring''.   The  extract  comprises
   the  MIB for the Dedicated Token Ring Concentrator, in SNMPv2 format.
   The changes from the previous version of this draft are small but
   important, and are in the area of CRF creation, where a RowStatus
   mechanism replaces the previous way of creating CRFs.

   802.5R  is a standard that encompasses the existing 802.5 token-
   passing method of operation, and also defines a new duplex method of
   operation for use only on dedicated point to point links, that does
   not use tokens for data transmission.

   The architecture of a DTR  Concentrator is defined in the 802.5R
   standard.  It  is a MAC layer bridging device, which uses a new set
   of forwarding rules that  ease interoperability between source
   routing and transparent bridging in an  802.5  LAN.  The DTR
   Concentrator MIB is derived from the Source Routing and Transparent
   Bridge MIBs  (RFCs 1525 and 1493).

Background

   In the  past,  SNMP  MIBs  for  IEEE  802 standards have been written
   by members  of  the  IETF Network Management Working Group, on the
   basis of GDMO  management  information  in  the  IEEE document.
   However, in this case, the draft IEEE 802.5R standard contains its
   management information in SNMP MIB format.

Brief Introduction to Dedicated Token Ring

   The operation of Dedicated Token Ring (DTR) involves communication
   between two distinct entities. These are the DTR Station, and the DTR
   Concentrator Port (C-Port). A DTR link consists of one DTR Station
   and one C-Port. To provide links between DTR Concentrators, a C-Port
   may act as a DTR Station (C-Port in Station Emulation Mode).

   When operating  as  a dedicated link, there is no token passing, and
   the Transmit Immediate (TXI) function is used to transmit data.

   In addition, DTR Stations and C-Ports are required to be able to
   support token-passing (TKP) operation, also referred to as Classic
   Token Ring operation.

   Stations and C-Ports will automatically detect the appropriate access
   protocol to use when they are enabled.

   In summary, DTR provides a way of connecting a Station to a



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   Concentrator on a dedicated link with an aggregate throughput of 32
   MBits/sec, and also provides backwards compatibility with shared
   media token passing operation at 16 or 4 MBits/sec.

   A DTR Concentrator may provide a MAC layer relay service between any
   mixture of DTR links and Classic 802.5 rings.

DTR Interface MIB



DTRConcentratorMIB DEFINITIONS ::= BEGIN
        IMPORTS
           enterprises
                FROM RFC1155-SMI
           MODULE-IDENTITY, OBJECT-TYPE, Counter32, Integer32,
           TimeTicks
                FROM SNMPv2-SMI
           InterfaceIndex
                FROM IF-MIB
           MODULE-COMPLIANCE, OBJECT-GROUP
                FROM SNMPv2-CONF
           IANAifType
                FROM IANAifType-MIB
           TruthValue, DisplayString, RowStatus,
           TEXTUAL-CONVENTION, MacAddress
                FROM SNMPv2-TC;

dtrConcMIB   MODULE-IDENTITY
        LAST-UPDATED "9510121200Z"
        ORGANIZATION " IEEE 802.5 "
        CONTACT-INFO
        "  Katie D. Lee
           IBM
           CNMA/664
           RTP, NC 27709
           kdlee@vnet.ibm.com
           +1 919 254 7507

           Trevor Warwick
           3Com Europe,
           Boundary Way,
           Hemel Hempstead,
           Herts,
           UK.
           Trevor_Warwick@3com.com
           +44 1442 438000"




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        DESCRIPTION
             " The MIB Module for DTR Concentrators. "
        ::= { ieee8025dtr 2 }

ieee8025        OBJECT IDENTIFIER ::= { enterprises 2043 }
ieee8025dtr     OBJECT IDENTIFIER ::= { ieee8025 1 }

dtrConcMIBObjects    OBJECT IDENTIFIER ::= { dtrConcMIB 1  }
dtrConcMIBBase       OBJECT IDENTIFIER ::= { dtrConcMIBObjects 1 }
dtrConcMIBSpTree     OBJECT IDENTIFIER ::= { dtrConcMIBObjects 2 }
dtrConcMIBForwarding OBJECT IDENTIFIER ::= { dtrConcMIBObjects 3 }
dtrConcMIBMRI        OBJECT IDENTIFIER ::= { dtrConcMIBObjects 4 }
dtrConcMIBStats      OBJECT IDENTIFIER ::= { dtrConcMIBObjects 5 }

--*************************************************************
--  This SNMP MIB Module contains definitions for management
--  of a DTR Concentrator.  The MIB consists of the following
--  groups:
-- 1. Base DTR Concentrator Information              (mandatory)
-- 2. DTR  Concentrator Spanning Tree Information     (optional)
-- 3. DTR  Concentrator Forwarding Information        (optional)
-- 4. DTR  Concentrator MRI Information               (optional)
-- 5. DTR  Concentrator Statistics Information        (optional)
--*************************************************************

--  Relationship to RFC1493
--      RFC1493 is not used for management of any CRF object.
--      However, if a Bridge Relay Function is defined for the
--      DTR Concentrator, the Bridge MIB is used for the Bridge
--      Relay Function.

--  Relationship to RFC1573

--  Layering Model
--      This MIB describes the Concentrator Relay Function (CRF)
--      which forwards frames based on addressing and other
--      information extracted from a received "lower layer" data
--      frame.  For the purposes of RFC1573, the CRF forwards
--      frames by building an "upper layer" protocol "logical
--      entity" used to connect several physical C-Ports to an
--      optional internal Bridge Relay Function interface.  The
--      same CRF can be defined as the "upper layer" for multiple
--      interfaces.  A given C-Port or internal Bridge Relay
--      Function interface provides data to only a single CRF.

--  Virtual Circuits
--      The CRF does not support virtual circuits.




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--  ifTestTable
--      The CRF does not implement tests via SNMP.

--  ifRcvAddressTable
--      For interfaces that correspond to a C-Port:  The C-Port
--      operates in promiscuous mode, hence this table contains
--      only the all station broadcast address, the functional
--      address bit mask (if any are enabled), and the C-Port
--      individual address.  Note that MAC traffic targeted
--      to this C-Port entry is not forwarded to the CRF.
--      Bridge Relay Function interfaces are not implemented
--      in this table.

--  ifType
--      Additional IANAifType enumerated values are required for
--      this MIB. These enumerated values correspond to the
--      following:
--          1. C-Port Interface (86).
--          2. Internal Bridge Relay Function interface (98).
--      This MIB maps dtrCRFPortType to ifType in RFC1573.

--  Textual Conventions

BridgeId ::= TEXTUAL-CONVENTION
    STATUS  current
    DESCRIPTION
       "The bridge  identifier  used  in  the  spanning  tree and
       defined in ISO/IEC 10038:1993, clause 4."
    SYNTAX  OCTET STRING (SIZE(8))

DynamicAddrFdbStatus ::= TEXTUAL-CONVENTION
    STATUS  current
    DESCRIPTION
       " Status of an Dynamic MAC address entry in the CRF
       Filtering Database.

           other(1) indicates some other MIB object (not the
           corresponding instance of dtrFdbDynamicAddrPortNumber,
           nor an entry in the dtrFdbStaticAddrTable ) is being
           used to determine if and how frames addressed to the
           value of the corresponding instance of
           dtrFdbDynamicAddrStnAddress are forwarded.

           invalid(2) indicates this entry is no longer valid,
           but has not been flushed from the table.

           learned(3) indicates dtrFdbDynamicAddrPortNumber for
           this entry was learned, and is being used.



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           self(4) indicates this instance of
           dtrFdbDynamicAddrStnAddress represents one of the CRF
           Addresses.  The corresponding instance of
           dtrFdbDynamicPortNumber's indicates which CRF Port has
           this address.

           mgmt(5) indicates the corresponding instance of
           dtrFdbDynamicAddrStnAddress is also a value of an
           existing DtrFdbStaticAddrStnAddress.  "

    SYNTAX  INTEGER {other(1), invalid(2), learned(3), self(4),
                     mgmt(5) }

DynamicRDFdbStatus ::= TEXTUAL-CONVENTION
    STATUS  current
    DESCRIPTION
        " Status of this entry.

            other(1) indicates some other MIB object is
            being used to determine how/if a frame containing
            this Destination Route Descriptor is forwarded.

            invalid(2) indicates this entry is no longer valid,
            but has not been flushed from the table.

            learned(3) indicates dtrFdbDynamicRDPortNumber
            for this entry was learned.

            internalBridgeRelayFunction(4) indicates
            dtrFdbDynamicRDRouteDesc and represents a relay
            across the Bridge Relay Function of this DTR
            Concentrator.

            mgmt(5) indicates dtrFdbDynamicRDRouteDesc is also
            a value of an existing dtrFdbStaticRDRouteDesc in
            the dtrFdbStaticRDTable. "

    SYNTAX  INTEGER {other(1), invalid(2), learned(3),
                     internalBridgeRelayFunction(4), mgmt(5) }

StaticFdbStatus ::= TEXTUAL-CONVENTION
    STATUS  current
    DESCRIPTION
        " Status of an entry in the CRF Filtering Database.

            other(1) indicates this entry is currently in
            use under conditions different from the available
            status definitions that follow.



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            invalid(2) indicates this entry is no longer valid,
            but has not been flushed from the table.  Writing
            this value to the object removes the entry.

            permanent(3) indicates this  entry is currently
            in use and will remain so after the next reset.

            deleteOnReset(4) indicates this  entry is currently
            in use and will remain so until the next reset. "

    SYNTAX INTEGER {other(1), invalid(2), permanent(3),
                    deleteOnReset(4)}

DestinationRouteDescriptor ::= TEXTUAL-CONVENTION
    STATUS  current
    DESCRIPTION
        "The Destination Route Descriptor (DRD) consists of 2
        parts; a 4 bit Bridge Number and a 12 bit LAN ID.  This
        identifies a bridge (BN) that has a port on the local LAN
        and a port connected to the indicated LAN ID.  This
        object consists of 3 octets, so that it can be easily
        compared with the RI fields of frames with routing
        information.  The first octet contains the BN in the 4
        least significant bits.  The second octet contains the
        most significant octet of the LAN ID and the final octet
        contains the least significant 4 bits of the LAN ID in
        the 4 most significant bits of the octet."

    SYNTAX  OCTET STRING (SIZE(3))

Timeout ::= TEXTUAL-CONVENTION
    STATUS  current
    DESCRIPTION
        "timer in 1/100 of sec"
    SYNTAX  INTEGER(0..65535)

--**********************************************************
-- Base DTR Concentrator Information
--**********************************************************

--******** General DTR Concentrator Information *********

dtrConcentratorAddress   OBJECT-TYPE
    SYNTAX          MacAddress
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " MAC address used by DTR Concentrator for uniqueness.



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        It must be unique "
    ::= { dtrConcMIBBase 1 }

dtrNumberOfCrfs   OBJECT-TYPE
    SYNTAX          INTEGER(1..255)
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " Number of Concentrator Relay Functions within the DTR
        Concentrator.  Min value is 1. "
    ::= { dtrConcMIBBase 2 }

dtrNumberOfBridgeRelays   OBJECT-TYPE
    SYNTAX          INTEGER(0|1)
    MAX-ACCESS      read-write
    STATUS          current
    DESCRIPTION
        " Number of Bridge Relay Functions within the DTR
        Concentrator.  Value of 0 or 1 is permitted.  Writing
        this object sets the number of bridge relay functions
        within the DTR Concentrator.  "
    ::= { dtrConcMIBBase 3 }

--********* Concentrator Relay Function Table ************
--   (one entry for each Concentrator Relay Function)

dtrCRFTable   OBJECT-TYPE
    SYNTAX          SEQUENCE OF DtrCRFEntry
    MAX-ACCESS      not-accessible
    STATUS          current
    DESCRIPTION
        " This table contains information for each Concentrator
        Relay Function in the DTR Concentrator.  "
    ::= { dtrConcMIBBase 6 }

dtrCRFEntry   OBJECT-TYPE
    SYNTAX          DtrCRFEntry
    MAX-ACCESS      not-accessible
    STATUS          current
    DESCRIPTION
        "Entry into the dtrCRFTable. "
    INDEX           { dtrCRFIndex }
    ::= { dtrCRFTable 1 }

DtrCRFEntry ::= SEQUENCE {
        dtrCRFIndex                INTEGER,
        dtrCRFNumberOfPorts        INTEGER,
        dtrCRFPortMask             OCTET STRING,



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        dtrCRFName                 DisplayString,
        dtrCRFMaxInfo              INTEGER,
        dtrCRFMacAddress           MacAddress,
        dtrCRFLocalLanId           INTEGER,
        dtrCRFAdminLocalLanId      INTEGER,
        dtrCRFFdbAgingTime         INTEGER,
        dtrCRFMRIEnable            INTEGER,
        dtrCRFLearnedEntryDiscards Counter32,
        dtrCRFRowStatus          RowStatus }

dtrCRFIndex   OBJECT-TYPE
    SYNTAX          INTEGER(1..255)
    MAX-ACCESS      not-accessible
    STATUS          current
    DESCRIPTION
        " The CRF number identifying this instance of CRF. "
    ::= { dtrCRFEntry 1 }

dtrCRFNumberOfPorts   OBJECT-TYPE
    SYNTAX          INTEGER(1..255)
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " The number of CRF Ports controlled by this CRF. "
    ::= { dtrCRFEntry 2 }

dtrCRFPortMask   OBJECT-TYPE
    SYNTAX          OCTET STRING
    MAX-ACCESS      read-write
    STATUS          current
    DESCRIPTION
        " The set of ports that are associated with this instance
        of a CRF.  Each octet within the value of this object
        specifies a set of eight ports, with the first octet
        specifying ports 1 through 8, the second octet specifying
        ports 9 through 16 and so on.  Within each octet, the
        most significant bit represents the lowest numbered port
        and the least significant bit represents the highest
        number port.  Writing this variable will modify the CRF
        configuration and update the value contained in
        dtrCRFNumberOfPorts.  "
    ::= { dtrCRFEntry 3 }

dtrCRFName   OBJECT-TYPE
    SYNTAX          DisplayString
    MAX-ACCESS      read-write
    STATUS          current
    DESCRIPTION



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        " The textual name of the CRF.  The value of this object
        is the name of the CRF as assigned by the DTR
        Concentrator and is suitable for use in commands entered
        at the DTR Concentrator console.  "
    ::= { dtrCRFEntry 4 }

dtrCRFMaxInfo   OBJECT-TYPE
    SYNTAX          INTEGER(516..18200)
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " The maximum size of the INFO field the CRF can
        transmit/receive.  "
    ::= { dtrCRFEntry 5  }

dtrCRFMacAddress   OBJECT-TYPE
    SYNTAX          MacAddress
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " The MAC address used with the dtrCRFSpTreePriority to
        form the CRF Identifier used in the spanning tree
        protocol.  This address must be unique and it is
        recommended this address be the specific MAC address of
        the lowest numbered C-Port.  "
    ::= { dtrCRFEntry 6 }

dtrCRFLocalLanId   OBJECT-TYPE
    SYNTAX          INTEGER(0..65535)
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " This is the value of the local lan id used by the CRF.
        This value may be assigned or may be learned by the CRF
        learning process.  Valid values range from 0 to 4095.
        The value of 65535 indicates that the lan id value has
        not been assigned or learned."
    ::= { dtrCRFEntry 7 }

dtrCRFAdminLocalLanId   OBJECT-TYPE
    SYNTAX          INTEGER(0..65535)
    MAX-ACCESS      read-write
    STATUS          current
    DESCRIPTION
        " Write to this object to assign the value of the local
        lan id used by the CRF.  Valid values range from 0 to
        4095.  The value of 65535 indicates that the lan id value
        has not been assigned.  "



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    ::= { dtrCRFEntry 8 }

dtrCRFFdbAgingTime   OBJECT-TYPE
    SYNTAX          INTEGER(10..1000000)
    MAX-ACCESS      read-write
    STATUS          current
    DESCRIPTION
        " The timeout period in seconds for aging out dynamic
        entries from the Filtering Database.  Recommended default
        is 300 seconds.  "
    DEFVAL {300}
    ::= { dtrCRFEntry 9 }

dtrCRFMRIEnable   OBJECT-TYPE
    SYNTAX          INTEGER{ enable(1), disable(2) }
    MAX-ACCESS      read-write
    STATUS          current
    DESCRIPTION
        " This object enables or disables the MRI function in the
        CRF.  "
    ::= { dtrCRFEntry 10  }

dtrCRFLearnedEntryDiscards   OBJECT-TYPE
    SYNTAX          Counter32
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " The total number of CRF Filtering Database entries,
        which have been or would have been learned, but have been
        discarded due to a lack of space to store them in the
        Filtering Database.  "
    ::= { dtrCRFEntry 11  }


dtrCRFRowStatus              OBJECT-TYPE
    SYNTAX         RowStatus
    MAX-ACCESS     Read-Create
    STATUS         current
    DESCRIPTION
       " Allows creation and deletion of CRF entries. "
    ::= {dtrCRFEntry 12}


--******************** CRF Port Table *******************

dtrCRFPortTable   OBJECT-TYPE
    SYNTAX          SEQUENCE OF DtrCRFPortEntry
    MAX-ACCESS      not-accessible



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    STATUS          current
    DESCRIPTION
        " This table contains information for each CRF Port in a
        Concentrator Relay Function.  "
    ::= { dtrConcMIBBase 7 }

dtrCRFPortEntry   OBJECT-TYPE
    SYNTAX          DtrCRFPortEntry
    MAX-ACCESS      not-accessible
    STATUS          current
    DESCRIPTION
        "Entry in the CRF Port Table"
    INDEX           { dtrCRFPortCRFIndex,
                      dtrCRFPortNumber }
    ::= { dtrCRFPortTable 1 }

DtrCRFPortEntry ::= SEQUENCE {
    dtrCRFPortCRFIndex              INTEGER,
    dtrCRFPortNumber                INTEGER,
    dtrCRFPortifIndex               InterfaceIndex,
    dtrCRFPortEnable                INTEGER, -- enumeration
    dtrCRFPortType                  IANAifType,
    dtrCRFPortMtuExceededDiscards   Counter32,
    dtrCRFPortDelayExceededDiscards Counter32 }

dtrCRFPortCRFIndex   OBJECT-TYPE
    SYNTAX          INTEGER(1..255)
    MAX-ACCESS      not-accessible
    STATUS          current
    DESCRIPTION
        " The CRF number identifying an instance of CRF "
    ::= { dtrCRFPortEntry 1 }

dtrCRFPortNumber   OBJECT-TYPE
    SYNTAX          INTEGER(1..2048)
    MAX-ACCESS      not-accessible
    STATUS          current
    DESCRIPTION
        " The CRF Port number for which this entry contains CRF
        management information.  There is a one to one
        correspondence between a bit position in the
        dtrCRFPortMask and the value of a CRF Port Number.  This
        correspondence is defined in the description of
        dtrCRFPortMask.  "
    ::= { dtrCRFPortEntry 2 }

dtrCRFPortifIndex   OBJECT-TYPE
    SYNTAX          InterfaceIndex



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    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " A unique value, greater than zero that corresponds to
        the interface this CRF Port is assigned (corresponds to
        ifIndex).  Writing this object defines the correspondence
        between the CRF Port and the interface (C-Port or Bridge
        Relay Function interface as determined by
        dtrCRFPortType.).  "
    ::= { dtrCRFPortEntry 3 }

dtrCRFPortEnable   OBJECT-TYPE
    SYNTAX          INTEGER{ enable(1), disable(2) }
    MAX-ACCESS      read-write
    STATUS          current
    DESCRIPTION
        " The enable/disable status of the CRF Port.  This
        control can be used to disable a port.  "
    ::= { dtrCRFPortEntry 4  }

dtrCRFPortType   OBJECT-TYPE
    SYNTAX          IANAifType
    MAX-ACCESS      read-write
    STATUS          current
    DESCRIPTION
        " Indicates the type of interface that this CRF Port is
        assigned to.  Only two types are permitted, a C-Port(86)
        and an internal bridge relay function(98).  Write this
        object to set the type of interface.  "
    ::= { dtrCRFPortEntry 5  }

dtrCRFPortMtuExceededDiscards   OBJECT-TYPE
    SYNTAX          Counter32
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " The number of frames discarded by the CRF Port due to
        excessive size (exceeds CrfMaxInfo).  "
    ::= { dtrCRFPortEntry 6  }

dtrCRFPortDelayExceededDiscards   OBJECT-TYPE
    SYNTAX          Counter32
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " The number of frames discarded by the CRF Port due to
        excessive delay through the CRF.  "
    ::= { dtrCRFPortEntry 7  }



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--*************************************************************
-- Spanning Tree Information
--*************************************************************

-- General DTR Concentrator Spanning Tree information

dtrSpanningTreeHoldTime   OBJECT-TYPE
    SYNTAX          Integer32
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " The minimum time period, in seconds, elapsing between
        the transmission of Configuration PDUs through a given
        port (CRFP or internal bridge).  This is a fixed
        parameter of the DTR Concentrator used by all member CRF
        and bridge entities.  Value specified by 802.1d is 1
        second.  "
    ::= { dtrConcMIBSpTree 1 }

dtrSpanningTreeProtocolSpecification   OBJECT-TYPE
    SYNTAX          INTEGER{ unknown(1), ieee8021d(3) }
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " An indication of what version of the Spanning Tree
        Protocol is being run on the DTR Concentrator.  "
    ::= { dtrConcMIBSpTree 2 }

dtrSpanningTreeTimeSinceTopoChange   OBJECT-TYPE
    SYNTAX          TimeTicks
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " The time (in 1/100ths of a second) since the last
        topology change was detected by the CRF or bridge
        entities within the DTR Concentrator.  "
    ::= { dtrConcMIBSpTree 3 }

dtrSpanningTreeTopologyChanges   OBJECT-TYPE
    SYNTAX          Counter32
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " The total number of topology changes detected by this
        concentrator since the management entity was last reset
        or initialized.  "
    ::= { dtrConcMIBSpTree 4  }




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dtrSpanningTreeBridgeForwardDelay   OBJECT-TYPE
    SYNTAX          Timeout(400..3000)
    MAX-ACCESS      read-write
    STATUS          current
    DESCRIPTION
        " The value that all spanning tree protocol entities (CRF
        or Bridge) use for ForwardDelay when this spanning tree
        protocol entity is acting as the root.  The range for
        this parameter is related to the value of
        dtrSpanningTreeBridgeMaxAge.  See ISO/IEC 10038:1993 and
        the relationship between dot1dStpBridgeMaxAge and
        dot1dStpBridgeForwardDelay.  The granularity of this
        timer is specified to be 1 second.  An agent may return a
        badValue error if a set is attempted to a value which is
        not a whole number of seconds.  "
    ::= { dtrConcMIBSpTree 5 }

dtrSpanningTreeBridgeHelloTime   OBJECT-TYPE
    SYNTAX          Timeout(100..1000)
    MAX-ACCESS      read-write
    STATUS          current
    DESCRIPTION
        " The value that all spanning tree protocol entities (CRF
        or Bridge) use for HelloTime when this spanning tree
        protocol entity is acting as the root.  The granularity
        of this timer is specified to be 1 second.  An agent may
        return a badValue error if a set is attempted to a value
        which is not a whole number of seconds.  "
    ::= { dtrConcMIBSpTree 6 }

dtrSpanningTreeBridgeMaxAge   OBJECT-TYPE
    SYNTAX          Timeout(600..4000)
    MAX-ACCESS      read-write
    STATUS          current
    DESCRIPTION
        " The value that all spanning tree protocol entities (CRF
        or Bridge) use for MaxAge when this spanning tree
        protocol entity is acting as the root.  The range for
        this parameter is related to the value of
        dtrSpanningTreeBridgeHelloTime.  See ISO/IEC 10038:1993
        and the relationship between dot1dStpBridgeMaxAge and
        dot1dStpBridgeHelloTime.  The granularity of this timer
        is specified to be 1 second.  An agent may return a
        badValue error if a set is attempted to a value which is
        not a whole number of seconds."
    ::= { dtrConcMIBSpTree 7 }

--******************* CRF Spanning tree Table *****************



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dtrCRFSpTreeTable   OBJECT-TYPE
    SYNTAX          SEQUENCE OF DtrCRFSpTreeEntry
    MAX-ACCESS      not-accessible
    STATUS          current
    DESCRIPTION
        " This table contains the spanning tree information for
        each CRF.  "
    ::= { dtrConcMIBSpTree 9 }

dtrCRFSpTreeEntry   OBJECT-TYPE
    SYNTAX          DtrCRFSpTreeEntry
    MAX-ACCESS      not-accessible
    STATUS          current
    DESCRIPTION
        "Entry in the dtrCRFSpTreeTable "
    INDEX           { dtrCRFSpTreeCRFIndex  }
    ::= { dtrCRFSpTreeTable 1 }

DtrCRFSpTreeEntry ::= SEQUENCE {
    dtrCRFSpTreeCRFIndex            INTEGER,
    dtrCRFSpTreePriority            INTEGER,  --(0..65535)
    dtrCRFSpTreeDesignatedRoot      BridgeId,
    dtrCRFSpTreeRootCost            Integer32,
    dtrCRFSpTreeRootPort            Integer32,
    dtrCRFSpTreeMaxAge              Timeout,  --1/100 second
    dtrCRFSpTreeHelloTime           Timeout,
    dtrCRFSpTreeForwardDelay        Timeout  } --1/100 second

dtrCRFSpTreeCRFIndex   OBJECT-TYPE
    SYNTAX          INTEGER(1..255)
    MAX-ACCESS      not-accessible
    STATUS          current
    DESCRIPTION
        " The CRF number identifying this instance of CRF. "
    ::= { dtrCRFSpTreeEntry 1 }

dtrCRFSpTreePriority   OBJECT-TYPE
    SYNTAX          INTEGER(0..65535)
    MAX-ACCESS      read-write
    STATUS          current
    DESCRIPTION
        " The value of the write-able portion of the CRF
        Identifier (The first two octets of the CRF Identifier.
        The last 6 octets of the CRF ID are given by the value of
        dtrCRFMacAddress.).  "
    ::= { dtrCRFSpTreeEntry 2 }

dtrCRFSpTreeDesignatedRoot   OBJECT-TYPE



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    SYNTAX          BridgeId
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " The bridge identifier of the root of the spanning tree
        as determined by the spanning tree protocol executed at
        this node.  "
    ::= { dtrCRFSpTreeEntry 3 }

dtrCRFSpTreeRootCost   OBJECT-TYPE
    SYNTAX          Integer32
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " The cost of the path to the root as seen from this CRF."
    ::= { dtrCRFSpTreeEntry 4 }

dtrCRFSpTreeRootPort   OBJECT-TYPE
    SYNTAX          Integer32
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " The CRF Port number of the CRF Port which offers the
        lowest cost path from this CRF to the root.  "
    ::= { dtrCRFSpTreeEntry 5 }

dtrCRFSpTreeMaxAge   OBJECT-TYPE
    SYNTAX          Timeout
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " The maximum age of Spanning Tree Protocol information
        learned from the network on any port (CRF or bridge
        within the DTR Concentrator) before it is discarded.
        Units are in 1/100th of a second.  This is the actual
        value currently in use.  "
    ::= { dtrCRFSpTreeEntry 6 }

dtrCRFSpTreeHelloTime   OBJECT-TYPE
    SYNTAX          Timeout
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " The amount of time between transmission of
        Configuration bridge PDUs used by a CRF that is
        attempting to become the Root or is the Root.  This is
        the value currently in use.  "
    ::= { dtrCRFSpTreeEntry 7 }



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dtrCRFSpTreeForwardDelay OBJECT-TYPE
    SYNTAX          Timeout
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " This time value, measured in 1/100th of a second, is
        used to control the amount of time spent in the Listening
        state when moving from the Blocking state to the
        Listening state and the amount of time in the Learning
        state when moving from the Learning state to the
        Forwarding state.  This time value is used for aging
        dynamic entries in the Filtering Database while the
        Topology Change flag is set in protocol messages received
        from the root.  This is the value the CRF is currently
        using.  "
    ::= { dtrCRFSpTreeEntry 8 }

-- ****************** Port Spanning Tree ***********************

dtrCRFPortSpTreeTable   OBJECT-TYPE
    SYNTAX          SEQUENCE OF DtrCRFPortSpTreeEntry
    MAX-ACCESS      not-accessible
    STATUS          current
    DESCRIPTION
        " This table contains spanning tree information for each
        CRF Port."
    ::= { dtrConcMIBSpTree 10 }

dtrCRFPortSpTreeEntry   OBJECT-TYPE
    SYNTAX          DtrCRFPortSpTreeEntry
    MAX-ACCESS      not-accessible
    STATUS          current
    DESCRIPTION
        " Entry in the dtrCRFPortSpTreeTable "
    INDEX           { dtrCRFPortSpTreeCRFIndex,
                      dtrCRFPortSpTreeNumber }
    ::= { dtrCRFPortSpTreeTable 1 }

DtrCRFPortSpTreeEntry ::= SEQUENCE {
    dtrCRFPortSpTreeCRFIndex                INTEGER,
    dtrCRFPortSpTreeNumber                  INTEGER,
    dtrCRFPortSpTreePriority                INTEGER, --(0..255)
    dtrCRFPortSpTreeState                   INTEGER, -- enumerated
    dtrCRFPortSpTreePathCost                INTEGER, --(1..65535)
    dtrCRFPortSpTreeDesignatedRoot          BridgeId,
    dtrCRFPortSpTreeDesignatedCost          Integer32,
    dtrCRFPortSpTreeDesignatedBridge        BridgeId,
    dtrCRFPortSpTreeDesignatedPort          OCTET STRING (SIZE(2)),



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    dtrCRFPortSpTreeForwardTransitions      Counter32 }

dtrCRFPortSpTreeCRFIndex   OBJECT-TYPE
    SYNTAX          INTEGER(1..255)
    MAX-ACCESS      not-accessible
    STATUS          current
    DESCRIPTION
        " The CRF number identifying this instance of CRF. "
    ::= { dtrCRFPortSpTreeEntry 1 }


dtrCRFPortSpTreeNumber   OBJECT-TYPE
    SYNTAX          INTEGER(1..255)
    MAX-ACCESS      not-accessible
    STATUS          current
    DESCRIPTION
        " The CRF Port number for which this entry contains CRF
            management information. "
    ::= { dtrCRFPortSpTreeEntry 2 }

dtrCRFPortSpTreePriority   OBJECT-TYPE
    SYNTAX          INTEGER(0..255)
    MAX-ACCESS      read-write
    STATUS          current
    DESCRIPTION
        " The value of the priority field is contained in the
        first byte of the CRF Port Identifier.  The second byte
        of the CRF Port Identifier is given by the value of CRF
        Port as identified by dtrCRFPortSpTreeNumber.  "
    ::= { dtrCRFPortSpTreeEntry 3 }

dtrCRFPortSpTreeState   OBJECT-TYPE
    SYNTAX          INTEGER{ disabled(1), blocking(2),
                             listening(3), learning(4),
                             forwarding(5), broken(6) }
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " The CRF Port state as defined by the operation of the
        Spanning Tree Protocol.  If the DTR concentrator detects
        a malfunctioning port , then it places that port into the
        broken(6) state.  The CRF Port states are defined as:
        disabled(1), blocking(2), listening(3), learning(4),
        forwarding(5), and broken(6).  "
    ::= { dtrCRFPortSpTreeEntry 4 }

dtrCRFPortSpTreePathCost   OBJECT-TYPE
    SYNTAX          INTEGER(1..65535)



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    MAX-ACCESS      read-write
    STATUS          current
    DESCRIPTION
        " The contribution of the path through this CRF Port to
        the total cost of the path to the Root for this CRF.  The
        path is identified by dtrCRFPortSpTreeNumber when the CRF
        Port is the Root Port.  "
    ::= { dtrCRFPortSpTreeEntry 5 }

dtrCRFPortSpTreeDesignatedRoot   OBJECT-TYPE
    SYNTAX          BridgeId
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " The unique bridge identifier of the bridge recorded as
        the Root in the root identifier parameter of the
        Configuration PDUs transmitted by the designated bridge
        for the LAN to which the CRF Port is attached.  "
    ::= { dtrCRFPortSpTreeEntry 6 }

dtrCRFPortSpTreeDesignatedCost   OBJECT-TYPE
    SYNTAX          Integer32
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " The cost of the path to the Root offered by the
        Designated Port on the LAN to which this CRF Port is
        attached.  "
    ::= { dtrCRFPortSpTreeEntry 7 }

dtrCRFPortSpTreeDesignatedBridge   OBJECT-TYPE
    SYNTAX          BridgeId
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " The unique Bridge or CRF Identifier of the Bridge or
        CRF considered to be the Designated Bridge for the LAN
        associated with the CRF Port.  "
    ::= { dtrCRFPortSpTreeEntry 8 }

dtrCRFPortSpTreeDesignatedPort   OBJECT-TYPE
    SYNTAX          OCTET STRING (SIZE(2))
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " The Port Identifier of the Bridge or CRF port believed
        to be the Designated Port for the LAN associated with the
        CRF Port "



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    ::= { dtrCRFPortSpTreeEntry 9 }

dtrCRFPortSpTreeForwardTransitions   OBJECT-TYPE
    SYNTAX          Counter32
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " The number of times this CRF Port, as identified by
        dtrCRFPortSpTreeNumber, has made a transition from the
        Learning state to the Forwarding State.  "
    ::= { dtrCRFPortSpTreeEntry 10 }

--  ***********************************************************
--  CRF Forwarding Information
--  ***********************************************************

--  The data contained within the filtering database tables is
--  affected by actions to configure the CRF.

--  When a CRF is modified, such as;

-- 1. CRF Ports are added or deleted, or
-- 2. Moved (change of correspondence to the ifIndex)

--  entries in dtrFdbDynamicAddrTable and dtrFdbDynamicRDTable
--  which correspond to the CRF are marked invalid and flushed
--  from the table.

--  When a CRF is destroyed, entries in dtrFdbDynamicAddrTable,
--  dtrFdbDynamicRDTable, dtrFdbStaticAddrTable, and
--  dtrFdbStaticRDTable which correspond to the CRF, are marked
--  invalid and flushed from the table.

--  ******** Dynamic Address Filtering Database Table *********

dtrFdbDynamicAddrTable   OBJECT-TYPE
    SYNTAX          SEQUENCE OF DtrFdbDynamicAddrEntry
    MAX-ACCESS      not-accessible
    STATUS          current
    DESCRIPTION
        " This table contains information about specific dynamic
        MAC address entries in the CRF Filtering Database."
    ::= { dtrConcMIBForwarding 1 }

dtrFdbDynamicAddrEntry   OBJECT-TYPE
    SYNTAX          DtrFdbDynamicAddrEntry
    MAX-ACCESS      not-accessible
    STATUS          current



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    DESCRIPTION
        " CRF Filtering Database Dynamic MAC address entry. "
    INDEX           { dtrFdbDynamicAddrCRFIndex,
                      dtrFdbDynamicAddrStnAddress }
    ::= { dtrFdbDynamicAddrTable 1 }

DtrFdbDynamicAddrEntry  ::= SEQUENCE {
    dtrFdbDynamicAddrCRFIndex       INTEGER,
    dtrFdbDynamicAddrStnAddress     MacAddress,
    dtrFdbDynamicAddrPortNumber     INTEGER,
    dtrFdbDynamicAddrStatus         DynamicAddrFdbStatus }

dtrFdbDynamicAddrCRFIndex   OBJECT-TYPE
    SYNTAX          INTEGER(1..255)
    MAX-ACCESS      not-accessible
    STATUS          current
    DESCRIPTION
        " The CRF number identifying this instance of CRF. "
    ::= { dtrFdbDynamicAddrEntry 1 }

dtrFdbDynamicAddrStnAddress   OBJECT-TYPE
    SYNTAX          MacAddress
    MAX-ACCESS      not-accessible
    STATUS          current
    DESCRIPTION
        " A unicast MAC address for which the CRF has forwarding
        information.  This object is updated by the Learning
        Process in the CRF.  "
    ::= { dtrFdbDynamicAddrEntry 2 }

dtrFdbDynamicAddrPortNumber   OBJECT-TYPE
    SYNTAX          INTEGER(0..255)
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " The CRF Port number of the CRF Port that a frame with
        an address matching dtrFdbDynamicAddrStnAddress in this
        dtrFdbDynamicAddrTable Entry has been seen.  A value of
        zero is assigned when dtrFdbDynamicAddrStnAddress is
        known, but the CRF Port number
        (dtrFdbDynamicAddrPortNumber) has not been learned.  "
    ::= { dtrFdbDynamicAddrEntry 3 }

dtrFdbDynamicAddrStatus   OBJECT-TYPE
    SYNTAX          DynamicAddrFdbStatus
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION



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        " Status of this entry.

           other(1) indicates some other MIB object (not the
           corresponding instance of dtrFdbDynamicAddrPortNumber,
           nor an entry in the dtrFdbStaticAddrTable ) is being
           used to determine if and how frames addressed to the
           value of the corresponding instance of
           dtrFdbDynamicAddrStnAddress are forwarded.

           invalid(2) indicates this entry is no longer valid,
           but has not been flushed from the table.

           learned(3) indicates dtrFdbDynamicAddrPortNumber for
           this entry was learned, and is being used.

           self(4) indicates this instance of
           dtrFdbDynamicAddrStnAddress represents one of the CRF
           Addresses.  The corresponding instance of
           dtrFdbDynamicPortNumber's indicates which CRF Port has
           this address.

           mgmt(5) indicates the corresponding instance of
           dtrFdbDynamicAddrStnAddress is also a value of an
           existing DtrFdbStaticAddrStnAddress.  "
    ::= { dtrFdbDynamicAddrEntry 4 }

--******** Static Address Filtering Database Table **********

dtrFdbStaticAddrTable   OBJECT-TYPE
    SYNTAX          SEQUENCE OF DtrFdbStaticAddrEntry
    MAX-ACCESS      not-accessible
    STATUS          current
    DESCRIPTION
        " This table contains information about specific static
        MAC address entries in the CRF Filtering Database.  "
    ::= { dtrConcMIBForwarding 2 }

dtrFdbStaticAddrEntry   OBJECT-TYPE
    SYNTAX          DtrFdbStaticAddrEntry
    MAX-ACCESS      not-accessible
    STATUS          current
    DESCRIPTION
        " CRF Filtering Database Static MAC Address Entry. "
    INDEX           { dtrFdbStaticAddrCRFIndex,
                      dtrFdbStaticAddrStnAddress }
    ::= { dtrFdbStaticAddrTable 1 }

DtrFdbStaticAddrEntry  ::= SEQUENCE {



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    dtrFdbStaticAddrCRFIndex        INTEGER,
    dtrFdbStaticAddrStnAddress      MacAddress,
    dtrFdbStaticAddrRowStatus       RowStatus,
    dtrFdbStaticAddrInMask          OCTET STRING,
    dtrFdbStaticAddrOutMask         OCTET STRING,
    dtrFdbStaticAddrStatus          StaticFdbStatus }

dtrFdbStaticAddrCRFIndex   OBJECT-TYPE
    SYNTAX          INTEGER(1..255)
    MAX-ACCESS      not-accessible
    STATUS          current
    DESCRIPTION
        " The CRF number identifying this instance of CRF. "
    ::= { dtrFdbStaticAddrEntry 1 }

dtrFdbStaticAddrStnAddress   OBJECT-TYPE
    SYNTAX          MacAddress
    MAX-ACCESS      not-accessible
    STATUS          current
    DESCRIPTION
        " The destination MAC address in a frame to which this
        entry's filtering information applies.  This object can
        take the value of a group or broadcast address.  "
    ::= { dtrFdbStaticAddrEntry 2 }

dtrFdbStaticAddrRowStatus   OBJECT-TYPE
    SYNTAX          RowStatus
    MAX-ACCESS      read-create
    STATUS          current
    DESCRIPTION
        " Allows creation and deletion of static entries. "
    ::= { dtrFdbStaticAddrEntry 3 }

dtrFdbStaticAddrInMask   OBJECT-TYPE
    SYNTAX          OCTET STRING
    MAX-ACCESS      read-create
    STATUS          current
    DESCRIPTION
        " The set of CRF Ports receiving frames with a
        destination address matching the address specified by the
        DtrFdbStaticAddrStnAddress in this entry which may
        forward this frame to any output CRF Port indicated by
        DtrFdbStaticAddrOutMask.  Each octet within the value of
        this object specifies a set of eight ports, with the
        first octet specifying CRF Ports 1 through 8, the second
        octet specifying CRF Ports 9 through 16 and so on.
        Within each octet, the most significant bit represents
        the lowest numbered port, and the least significant bit



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        represents the highest numbered port.  The default value
        of this object is a string of ones of appropriate length.
        "
    ::= { dtrFdbStaticAddrEntry 4 }

dtrFdbStaticAddrOutMask   OBJECT-TYPE
    SYNTAX          OCTET STRING
    MAX-ACCESS      read-create
    STATUS          current
    DESCRIPTION
        " The set of CRF Ports to which frames with a destination
        address matching the address specified by the
        DtrFdbStaticAddrStnAddress in this entry may be forwarded
        to.  Each octet within the value of this object specifies
        a set of eight ports, with the first octet specifying CRF
        Ports 1 through 8, the second octet specifying CRF Ports
        9 through 16 and so on.  Within each octet, the most
        significant bit represents the lowest numbered port, and
        the least significant bit represents the highest numbered
        port.  The default value of this object is a string of
        ones of appropriate length.  "
    ::= { dtrFdbStaticAddrEntry 5 }

dtrFdbStaticAddrStatus   OBJECT-TYPE
    SYNTAX          StaticFdbStatus
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " Status of this entry.

           other(1) indicates this entry is currently in use
           under conditions different from the available status
           definitions that follow.

           invalid(2) indicates this entry is no longer valid,
           but has not been flushed from the table.  Writing this
           value to the object removes the entry.

           permanent(3) indicates that the entry is currently in
           use and will remain so after the next reset.

           deleteOnReset(4) indicates the entry is currently in
           use and will remain so until the next reset.  "
    ::= { dtrFdbStaticAddrEntry 6 }

--**************************************************************
-- Dynamic Destination Route Descriptor Filtering Database Table
--**************************************************************



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dtrFdbDynamicRDTable   OBJECT-TYPE
    SYNTAX          SEQUENCE OF DtrFdbDynamicRDEntry
    MAX-ACCESS      not-accessible
    STATUS          current
    DESCRIPTION
        " This table contains information about a specific
        dynamic route descriptor entry in the CRF Filtering
        Database.  "
    ::= { dtrConcMIBForwarding 3 }

dtrFdbDynamicRDEntry   OBJECT-TYPE
    SYNTAX          DtrFdbDynamicRDEntry
    MAX-ACCESS      not-accessible
    STATUS          current
    DESCRIPTION
            "    "
    INDEX           { dtrFdbDynamicRDCRFIndex,
                      dtrFdbDynamicRDRouteDesc }
    ::= { dtrFdbDynamicRDTable 1 }

DtrFdbDynamicRDEntry ::= SEQUENCE {
    dtrFdbDynamicRDCRFIndex         INTEGER,
    dtrFdbDynamicRDRouteDesc        DestinationRouteDescriptor,
    dtrFdbDynamicRDPortNumber       INTEGER,
    dtrFdbDynamicRDStatus           DynamicRDFdbStatus }

dtrFdbDynamicRDCRFIndex          OBJECT-TYPE
    SYNTAX          INTEGER(1..255)
    MAX-ACCESS      not-accessible
    STATUS          current
    DESCRIPTION
        " The CRF number identifying this instance of CRF. "
    ::= { dtrFdbDynamicRDEntry 1 }

dtrFdbDynamicRDRouteDesc   OBJECT-TYPE
    SYNTAX          DestinationRouteDescriptor
    MAX-ACCESS      not-accessible
    STATUS          current
    DESCRIPTION
        " A Destination Route Descriptor for which the CRF has
        forwarding information.  The Destination Route Descriptor
        (DRD) consists of 2 parts; a 4 bit Bridge Number and a 12
        bit LAN ID.  This identifies a bridge (BN) which has a
        port on the local LAN and a port connected to the
        indicated LAN ID.  This object consists of 3 octets so
        that it can be easily compared with the RI fields of
        frames with routing information.  The first octet
        contains the BN in the 4 least significant bits.  The



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        second octet contains the most significant octet of the
        LAN ID and the final octet contains the least significant
        4 bits of the LAN ID in the 4 most significant bits of
        the octet.  "
    ::= { dtrFdbDynamicRDEntry 2}

dtrFdbDynamicRDPortNumber   OBJECT-TYPE
    SYNTAX          INTEGER(1..255)
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " The CRF Port number of the CRF Port on which a frame
        with a Destination Route Descriptor matching
        dtrFdbDynamicRDRouteDesc in this DtrFdbDynamicRDEntry has
        been seen.  A value of zero is assigned when
        dtrFdbDynamicRDRouteDesc is known, but the CRF Port
        number has not been learned.  "
    ::= { dtrFdbDynamicRDEntry 3 }

dtrFdbDynamicRDStatus   OBJECT-TYPE
    SYNTAX          DynamicRDFdbStatus
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " Status of this entry.

           other(1) this includes the case where some other MIB
           object is being used to determine how/if a frame
           containing this Destination Route Descriptor is
           forwarded.

           invalid(2) indicates this entry is no longer valid,
           but has not been flushed from the table.

           learned(3) indicates dtrFdbDynamicRDPortNumber for
           this entry was learned.

           internalBridgeRelayFunction(4) indicates
           dtrFdbDynamicRDRouteDesc represents a relay across the
           Bridge Relay Function of this DTR Concentrator.

           mgmt(5) indicates dtrFdbDynamicRDRouteDesc is also a
           value of an existing dtrFdbStaticRDRouteDesc in the
           dtrFdbStaticRDTable."
    ::= { dtrFdbDynamicRDEntry 4 }

--*************************************************************
-- Static Destination Route Descriptor Filtering Database Table



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

dtrFdbStaticRDTable   OBJECT-TYPE
    SYNTAX          SEQUENCE OF DtrFdbStaticRDEntry
    MAX-ACCESS      not-accessible
    STATUS          current
    DESCRIPTION
        "A table containing information about specific static
        route descriptor entries in the CRF Filtering Database."
    ::= { dtrConcMIBForwarding 5 }

dtrFdbStaticRDEntry   OBJECT-TYPE
    SYNTAX          DtrFdbStaticRDEntry
    MAX-ACCESS      not-accessible
    STATUS          current
    DESCRIPTION
            "    "
    INDEX           { dtrFdbStaticRDCRFIndex,
                      dtrFdbStaticRDRouteDesc }
    ::= { dtrFdbStaticRDTable 1 }

DtrFdbStaticRDEntry  ::= SEQUENCE {
    dtrFdbStaticRDCRFIndex          INTEGER,
    dtrFdbStaticRDRouteDesc         DestinationRouteDescriptor,
    dtrFdbStaticRDRowStatus         RowStatus,
    dtrFdbStaticRDPortNumber        INTEGER,
    dtrFdbStaticRDStatus            StaticFdbStatus }

dtrFdbStaticRDCRFIndex   OBJECT-TYPE
    SYNTAX          INTEGER(1..255)
    MAX-ACCESS      not-accessible
    STATUS          current
    DESCRIPTION
            " The CRF number identifying this instance of CRF. "
    ::= { dtrFdbStaticRDEntry 1 }

dtrFdbStaticRDRouteDesc   OBJECT-TYPE
    SYNTAX          DestinationRouteDescriptor
    MAX-ACCESS      not-accessible
    STATUS          current
    DESCRIPTION
        " Static Entries containing Destination Route Descriptor
        information for internal Bridge Ports.  These entries are
        added as part of the initialization of the DTR
        Concentrator when an internal Bridge Relay Function is
        enabled (dtrOperNumberOfBridgeRelays=1).

        The Destination Route Descriptor (DRD) consists of 2



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        parts; a 4 bit Bridge Number and a 12 bit LAN ID.  This
        identifies a bridge (BN) that has a port on the local LAN
        and a port connected to the indicated LAN ID.  This
        object consists of 3 octets so that it can be easily
        compared with the RI fields of frames with routing
        information.  The first octet contains the BN in the 4
        least significant bits.  The second octet contains the
        most significant octet of the LAN ID and the final octet
        contains the least significant 4 bits of the LAN ID in
        the 4 most significant bits of the octet.  "
    ::= { dtrFdbStaticRDEntry 2 }

dtrFdbStaticRDRowStatus   OBJECT-TYPE
    SYNTAX          RowStatus
    MAX-ACCESS      read-create
    STATUS          current
    DESCRIPTION
        "Allows creation and deletion of static entries"
    ::= { dtrFdbStaticRDEntry 3 }


dtrFdbStaticRDPortNumber   OBJECT-TYPE
    SYNTAX          INTEGER(1..255)
    MAX-ACCESS      read-create
    STATUS          current
    DESCRIPTION
        " The CRF Port number of the CRF Port on whicha frame with
            a Destination Route Descriptor matching
            dtrFdbStaticRDRouteDesc in this DtrFdbStaticRDEntry is
            forwarded. "
    ::= { dtrFdbStaticRDEntry 4 }

dtrFdbStaticRDStatus   OBJECT-TYPE
    SYNTAX          StaticFdbStatus
    MAX-ACCESS      read-create
    STATUS          current
    DESCRIPTION
        "Status of this entry.

           other(1) indicates this entry is currently in use
           under conditions different from the available status
           definitions that follow.

           invalid(2) indicates this entry is no longer valid,
           but has not been flushed from the table.  Writing this
           value to the object removes the entry.

           permanent(3) indicates the entry is currently in use



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           and will remain so after the next reset.

           deleteOnReset(4) indicates the entry is currently in
           use and will remain so until the next reset.  "
    ::= { dtrFdbStaticRDEntry 5 }

--************************************************************
-- MRI Information
--************************************************************

--*********************** MRI Table **************************

dtrMRITable   OBJECT-TYPE
    SYNTAX          SEQUENCE OF DtrMRIEntry
    MAX-ACCESS      not-accessible
    STATUS          current
    DESCRIPTION
        " This table contains information about the CRF port out
        mask for specific management functions.  "
    ::= { dtrConcMIBMRI 1 }

dtrMRIEntry   OBJECT-TYPE
    SYNTAX          DtrMRIEntry
    MAX-ACCESS      not-accessible
    STATUS          current
    DESCRIPTION
        " Entry into dtrMRITable "
    INDEX           { dtrMRICRFIndex,
                      dtrMRIMgmtType }
    ::= { dtrMRITable 1 }

DtrMRIEntry ::= SEQUENCE {
    dtrMRICRFIndex  INTEGER,
    dtrMRIMgmtType  INTEGER,
    dtrMRIOutMask   OCTET STRING }

dtrMRICRFIndex   OBJECT-TYPE
    SYNTAX          INTEGER(1..255)
    MAX-ACCESS      not-accessible
    STATUS          current
    DESCRIPTION
            " The CRF number identifying this instance of CRF. "
    ::= { dtrMRIEntry 1 }

dtrMRIMgmtType   OBJECT-TYPE
    SYNTAX          INTEGER(0..15)
    MAX-ACCESS      not-accessible
    STATUS          current



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    DESCRIPTION
        " Identifies the function class for this entry.  The MRI
        forwards frames with a destination class equal to
        dtrMRIMgmtType using the corresponding mask entry
        (dtrMRIOutMask).  When the destination class is 0 and the
        source class is not 0, the destination address in the MAC
        frame is used to forward the frame.  MAC frames with a
        destination class not found in this table are not
        forwarded by the MRI.  "
    ::= { dtrMRIEntry 2 }

dtrMRIOutMask   OBJECT-TYPE
    SYNTAX          OCTET STRING
    MAX-ACCESS      read-write
    STATUS          current
    DESCRIPTION
        " The set of CRF Ports to which frames with a destination
        class matching the function class specified by the
        dtrMRIMgmtType in this entry may be forwarded to.  Each
        octet within the value of this object specifies a set of
        eight ports, with the first octet specifying CRF Ports 1
        through 8, the second octet specifying CRF Ports 9
        through 16 and so on.  Within each octet, the most
        significant bit represents the lowest numbered port, and
        the least significant bit represents the highest numbered
        port.  "
    ::= { dtrMRIEntry 3 }

--**********************************************************
-- Statistics Information
--**********************************************************

--************* CRF Port Statistics Information ************

dtrCRFPortStatsTable   OBJECT-TYPE
    SYNTAX          SEQUENCE OF DtrCRFPortStatsEntry
    MAX-ACCESS      not-accessible
    STATUS          current
    DESCRIPTION
        " This table contains the counters for each CRF Port.  "
    ::= { dtrConcMIBStats 1 }


dtrCRFPortStatsEntry   OBJECT-TYPE
    SYNTAX          DtrCRFPortStatsEntry
    MAX-ACCESS      not-accessible
    STATUS          current
    DESCRIPTION



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        " Entry into the CRFPortStatsTable. "
    INDEX           { dtrCRFPortStatsCRFIndex,
                      dtrCRFPortStatsPortNumber }
    ::= { dtrCRFPortStatsTable 1 }

DtrCRFPortStatsEntry  ::= SEQUENCE {
    dtrCRFPortStatsCRFIndex         INTEGER,
    dtrCRFPortStatsPortNumber       INTEGER,
    dtrCRFPortStatsAreInFrames      Counter32,
    dtrCRFPortStatsAreOutFrames     Counter32,
    dtrCRFPortStatsInFrames         Counter32,
    dtrCRFPortStatsOutFrames        Counter32,
    dtrCRFPortStatsSrfInFrames      Counter32,
    dtrCRFPortStatsSrfOutFrames     Counter32,
    dtrCRFPortStatsSteInFrames      Counter32,
    dtrCRFPortStatsSteOutFrames     Counter32,
    dtrCRFPortStatsInvalidRI        Counter32,
    dtrCRFPortStatsInMisdirected    Counter32,
    dtrCRFPortStatsInDiscards       Counter32 }

dtrCRFPortStatsCRFIndex   OBJECT-TYPE
    SYNTAX          INTEGER(1..255)
    MAX-ACCESS      not-accessible
    STATUS          current
    DESCRIPTION
        " The CRF number identifying this instance of CRF. "
    ::= { dtrCRFPortStatsEntry 1 }

dtrCRFPortStatsPortNumber   OBJECT-TYPE
    SYNTAX          INTEGER(1..255)
    MAX-ACCESS      not-accessible
    STATUS          current
    DESCRIPTION
        " The CRF Port number for which this entry contains CRF
        management information. "
    ::= { dtrCRFPortStatsEntry 2 }

dtrCRFPortStatsAreInFrames   OBJECT-TYPE
    SYNTAX          Counter32
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " The number of ARE frames received at this CRF Port.
        This count does not include ARE frames whichhave been
        misdirected (final Lan Id does not match the local Lan Id
        maintained by the CRF (dtrCRFLocalLanId)). "
    ::= { dtrCRFPortStatsEntry 3 }




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dtrCRFPortStatsAreOutFrames   OBJECT-TYPE
    SYNTAX          Counter32
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " The number of ARE frames transmitted by this CRF Port.
        This count does not include ARE frames which have been
        misdirected (final Lan Id does not match the Local Lan Id
        maintained by the CRF (dtrCRFLocalLanId)). "
    ::= { dtrCRFPortStatsEntry 4 }

dtrCRFPortStatsInFrames   OBJECT-TYPE
    SYNTAX          Counter32
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " The number of valid frames received by this CRF Port."
    ::= { dtrCRFPortStatsEntry 5 }

dtrCRFPortStatsOutFrames   OBJECT-TYPE
    SYNTAX          Counter32
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
            " The number of frames transmitted by this CRF Port. "
    ::= { dtrCRFPortStatsEntry 6 }

dtrCRFPortStatsSrfInFrames   OBJECT-TYPE
    SYNTAX          Counter32
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " The number of SRF frames received by this CRF Port and
        forwarded to another port on the CRF."
    ::= { dtrCRFPortStatsEntry 7 }

dtrCRFPortStatsSrfOutFrames   OBJECT-TYPE
    SYNTAX          Counter32
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " The number of SRF frames transmitted by this CRF Port. "
    ::= { dtrCRFPortStatsEntry 8 }

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



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    DESCRIPTION
        " The number of STE frames received at this CRF Port.
        This count does not include STE frames which have been
        misdirected (final Lan Id does not match the local Lan Id
        maintained by the CRF (dtrCRFLocalLanId)). "
    ::= { dtrCRFPortStatsEntry 9 }

dtrCRFPortStatsSteOutFrames   OBJECT-TYPE
    SYNTAX          Counter32
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " The number of STE frames transmitted by this CRF Port.
        This count does not include STE frames which have been
        misdirected (final Lan Id does not match the local Lan Id
        maintained by the CRF (dtrCRFLocalLanId)). "
    ::= { dtrCRFPortStatsEntry 10 }

dtrCRFPortStatsInvalidRI   OBJECT-TYPE
    SYNTAX          Counter32
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " The number of frames discarded due to a formatting
        error (i.e., an odd RI length, or 0 RI length) (Reference
        ISO/IEC 10038:1993 C4.2.1.1.3). "
    ::= { dtrCRFPortStatsEntry 11 }

dtrCRFPortStatsInMisdirected   OBJECT-TYPE
    SYNTAX          Counter32
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " The number of source routed frames received at this CRF
        Port where the local Lan Id (dtrCRFLocalLanId) is not
        present or is not last (explorer frame).  Explorer frames
        (ARE and STE) are broadcast to all Forwarding CRF Ports.
        SRF frames are discarded if the DA is specific and they
        are broadcast if the DA is multicast. "
    ::= { dtrCRFPortStatsEntry 12 }

dtrCRFPortStatsInDiscards   OBJECT-TYPE
    SYNTAX          Counter32
    MAX-ACCESS      read-only
    STATUS          current
    DESCRIPTION
        " The number of frames discarded by the Forwarding
        Process.  This count may include frames that are



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        discarded by the Frame Reception process. "
    ::= { dtrCRFPortStatsEntry 13 }

--**********************************************************
-- Conformance information
--**********************************************************

dtrConcConformance OBJECT IDENTIFIER ::= { dtrConcMIB 2 }
dtrConcCompliances OBJECT IDENTIFIER ::= { dtrConcConformance 1 }
dtrConcGroups      OBJECT IDENTIFIER ::= { dtrConcConformance 2 }

-- Compliance statements

dtrConcCompliance   MODULE-COMPLIANCE
    STATUS          current
    DESCRIPTION
        " The compliance statement for the SNMPv2 entities which
        implement the dtrConc MIB."

    MODULE -- this module
    MANDATORY-GROUPS { dtrConcBaseGroup }

    -- Optional groups

    GROUP   dtrConcSpanningTreeGroup
    DESCRIPTION
        " Implementation of this group is optional. "

    GROUP   dtrConcFdbDynamicAddrGroup
    DESCRIPTION
        " Implementation of this group is optional. "

    GROUP   dtrConcFdbStaticAddrGroup
    DESCRIPTION
        " Implementation of this group is optional. "

    GROUP   dtrConcFdbDynamicRDGroup
    DESCRIPTION
        " Implementation of this group is optional. "

    GROUP   dtrConcFdbStaticRDGroup
    DESCRIPTION
        " Implementation of this group is optional. "

    GROUP   dtrConcMRIGroup
    DESCRIPTION
        " Implementation of this group is optional. "




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    GROUP   dtrConcCRFPortStatsGroup
    DESCRIPTION
        " Implementation of this group is optional. "

    -- Refined OBJECT requirements

    OBJECT   dtrNumberOfCrfs
    MIN-ACCESS      read-only
    DESCRIPTION
        " Write access is not required. "

    OBJECT   dtrNumberOfBridgeRelays
    MIN-ACCESS      read-only
    DESCRIPTION
        " Write access is not required. "

    OBJECT   dtrCRFPortMask
    MIN-ACCESS      read-only
    DESCRIPTION
        " Write access is not required. "

    OBJECT   dtrCRFAdminLocalLanId
    MIN-ACCESS      read-only
    DESCRIPTION
        " Write access is not required. "


    OBJECT   dtrCRFMRIEnable
    MIN-ACCESS      read-only
    DESCRIPTION
        " Write access is not required. "

    OBJECT dtrCRFRowStatus
    MIN-ACCESS     read-only
    DESCRIPTION
         "Write access is not required."

    OBJECT   dtrCRFName
    MIN-ACCESS      read-only
    DESCRIPTION
        " Write access is not required. "

    OBJECT   dtrCRFPortType
    MIN-ACCESS      read-only
    DESCRIPTION
        " Write access is not required. "

    OBJECT   dtrFdbStaticAddrRowStatus



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    SYNTAX  INTEGER { active(1) }
    MIN-ACCESS      read-only
    DESCRIPTION
        " Write access is not required and only one of the six
        enumerated values for the RowStatus textual convention
        need be supported, specifically active(1). "

    OBJECT   dtrFdbStaticAddrInMask
    MIN-ACCESS      read-only
    DESCRIPTION
        " Write access is not required. "

    OBJECT   dtrFdbStaticAddrOutMask
    MIN-ACCESS      read-only
    DESCRIPTION
        " Write access is not required. "

    OBJECT   dtrFdbStaticRDRowStatus
    SYNTAX  INTEGER { active(1) }
    MIN-ACCESS      read-only
    DESCRIPTION
        " Write access is not required and only one of the six
        enumerated values for the RowStatus textual convention
        need be supported, specifically active(1). "

    OBJECT   dtrFdbStaticRDPortNumber
    MIN-ACCESS      read-only
    DESCRIPTION
            " Write access is not required. "

    ::= { dtrConcCompliances 1 }

    -- Units of conformance

dtrConcBaseGroup   OBJECT-GROUP
    OBJECTS { dtrConcentratorAddress, dtrNumberOfCrfs,
            dtrNumberOfBridgeRelays, dtrCRFNumberOfPorts,
            dtrCRFPortMask, dtrCRFName, dtrCRFMaxInfo,
            dtrCRFMacAddress, dtrCRFLocalLanId,
            dtrCRFAdminLocalLanId, dtrCRFFdbAgingTime,
            dtrCRFMRIEnable, dtrCRFLearnedEntryDiscards,
         dtrCRFRowStatus,
            dtrCRFPortEnable, dtrCRFPortType, dtrCRFPortifIndex,
            dtrCRFPortMtuExceededDiscards,
            dtrCRFPortDelayExceededDiscards }
    STATUS  current
    DESCRIPTION
        " A collection of objects providing information about the



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        DTR concentrator. "
    ::= { dtrConcGroups 1 }

dtrConcSpanningTreeGroup   OBJECT-GROUP
    OBJECTS   { dtrSpanningTreeHoldTime,
            dtrSpanningTreeProtocolSpecification,
            dtrSpanningTreeTimeSinceTopoChange,
            dtrSpanningTreeTopologyChanges,
            dtrSpanningTreeBridgeForwardDelay,
            dtrSpanningTreeBridgeHelloTime,
            dtrSpanningTreeBridgeMaxAge,
            dtrCRFSpTreePriority, dtrCRFSpTreeDesignatedRoot,
            dtrCRFSpTreeRootCost, dtrCRFSpTreeRootPort,
            dtrCRFSpTreeMaxAge,
            dtrCRFSpTreeHelloTime, dtrCRFSpTreeForwardDelay,
            dtrCRFPortSpTreePriority, dtrCRFPortSpTreeState,
            dtrCRFPortSpTreePathCost,
            dtrCRFPortSpTreeDesignatedRoot,
            dtrCRFPortSpTreeDesignatedCost,
            dtrCRFPortSpTreeDesignatedBridge,
            dtrCRFPortSpTreeDesignatedPort,
            dtrCRFPortSpTreeForwardTransitions }
    STATUS  current
    DESCRIPTION
        " A collection of objects providing information on the
        spanning tree operation of a DTR Concentrator. "
    ::= { dtrConcGroups 2 }

dtrConcFdbDynamicAddrGroup   OBJECT-GROUP
    OBJECTS   { dtrFdbDynamicAddrPortNumber,
                dtrFdbDynamicAddrStatus}
    STATUS  current
    DESCRIPTION
        " A collection of objects providing information about
        dynamic MAC address entries in the CRF Filtering Database. "
    ::= { dtrConcGroups 3 }

dtrConcFdbStaticAddrGroup   OBJECT-GROUP
    OBJECTS   { dtrFdbStaticAddrRowStatus, dtrFdbStaticAddrInMask,
                dtrFdbStaticAddrOutMask, dtrFdbStaticAddrStatus }
    STATUS  current
    DESCRIPTION
        " A collection of objects providing information about
        static MAC address entries in the CRF Filtering Database. "
    ::= { dtrConcGroups 4 }

dtrConcFdbDynamicRDGroup   OBJECT-GROUP
    OBJECTS   { dtrFdbDynamicRDPortNumber, dtrFdbDynamicRDStatus }



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    STATUS  current
    DESCRIPTION
        " A collection of objects providing information about
        dynamic Destination Route Descriptors in the CRF
        Filtering Database. "
    ::= { dtrConcGroups 5 }


dtrConcFdbStaticRDGroup   OBJECT-GROUP
    OBJECTS   { dtrFdbStaticRDRowStatus,
                dtrFdbStaticRDPortNumber, dtrFdbStaticRDStatus }
    STATUS  current
    DESCRIPTION
        " A collection of objects providing information about
        dynamic Destination Route Descriptors in the CRF
        Filtering Database. "
    ::= { dtrConcGroups 6 }

dtrConcMRIGroup   OBJECT-GROUP
    OBJECTS   { dtrMRIOutMask }
    STATUS  current
    DESCRIPTION
        " A  collection  of  objects providing information on the
        CRF port out mask for specific management functions. "
    ::= { dtrConcGroups 7 }

dtrConcCRFPortStatsGroup   OBJECT-GROUP
    OBJECTS   { dtrCRFPortStatsAreInFrames,
                dtrCRFPortStatsAreOutFrames,
                dtrCRFPortStatsInFrames,
                dtrCRFPortStatsOutFrames,
                dtrCRFPortStatsSrfInFrames,
                dtrCRFPortStatsSrfOutFrames,
                dtrCRFPortStatsSteInFrames,
                dtrCRFPortStatsSteOutFrames,
                dtrCRFPortStatsInvalidRI,
                dtrCRFPortStatsInMisdirected,
                dtrCRFPortStatsInDiscards }
    STATUS  current
    DESCRIPTION
        " A    collection    of    objects   providing   protocol
        characteristics for a DTR C-Port. "
    ::= { dtrConcGroups 8 }

END






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