Network Working Group                                 J. Hilgeman, Chair
Request for Comments: 1747                    Apertus Technologies, Inc.
Category: Standards Track                                         S. Nix
                                                          Metaplex, Inc.
                                                               A. Bartky
                                                     Sync Research, Inc.
                                                        W. Clark, Editor
                                                     cisco Systems, Inc.
                                                            January 1995


    Definitions of Managed Objects for SNA Data Link Control (SDLC)
                              using SMIv2

Status of this Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Abstract

   This specification defines an extension to the Management Information
   Base (MIB) for use with SNMP-based network management.  In
   particular, it defines objects for managing the configuration,
   monitoring and control of data link controls in an SNA environment.
   This draft identifies managed objects for SNA Synchronous Data Link
   Control (SDLC) links only.

Table of Contents

   1.     The SNMPv2 Network Management Framework  .................  2
   1.1      Object Definitions  ....................................  2
   2.     Overview  ................................................  2
   2.1      Tables Defined in the SNADLC SDLC MIB  .................  3
   2.2      Row Creation Mechanism  ................................  3
   2.3      Relationship to the Interfaces Group  ..................  4
   3.     Definitions  .............................................  7
   3.1      Port Administrative Table  .............................  9
   3.2      Port Operational Table  ...............................  14
   3.3      Port Statistics Table  ................................  20
   3.4      Link Station Administrative Table  ....................  26
   3.5      Link Station Operational Table  .......................  35
   3.6      Link Station Statistics Table  ........................  44
   3.7      Trap Definitions  .....................................  56
   3.8      Compliance Statements  ................................  57



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   4.     Acknowledgments  ........................................  65
   5.     References  .............................................  65
   6.     Glossary  ...............................................  66
   7.     Security Considerations  ................................  67
   8.     Authors' Addresses  .....................................  67

1.  The SNMPv2 Network Management Framework

   The SNMPv2 Network Management Framework consists of four major
   components.  They are:

      o    RFC 1441 which defines the SMI, the mechanisms used for
           describing and naming objects for the purpose of management.

      o    STD 17, RFC 1213 defines MIB-II, the core set of managed
           objects for the Internet suite of protocols.

      o    RFC 1445 which defines the administrative and other
           architectural aspects of the framework.

      o    RFC 1448 which defines the protocol used for network access
           to managed objects.

   The Framework permits new objects to be defined for the purpose of
   experimentation and evaluation.

1.1.  Object Definitions

   Managed objects are accessed via a virtual information store, termed
   the Management Information Base or 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 object type is named
   by an OBJECT IDENTIFIER, 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, we often use a textual string, termed the descriptor, to
   refer to the object type.

2.  Overview

   This memo identifies the proposed set of objects for configuring,
   monitoring, and controlling SDLC ports and link stations.









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2.1.  Tables Defined in the SNADLC SDLC MIB

   The SNADLC MIB is composed of two managed entities with three tables
   each.  The two managed entities for SDLC are:

     o    Ports: the physical connection, and

     o    Link Stations: the logical connections on the Port.

   The three management tables are:

     o    Adminstration: objects used for configuring and controlling
          the operation of a Port or Link Station,

     o    Operational: objects that reflect the run-time state of the
          Port or Link Station, and

     o    Statistics: objects that reflect the operating metrics of the
          Port or Link Station.

   Considering the above combinations, the following are the actual
   tables found in this MIB:

     1)   Port Administration Table,

     2)   Port Operation Table,

     3)   Port Statistics Table,

     4)   Link Station Administration Table,

     5)   Link Station Operation Table,

     6)   Link Station Statistics Table.

   All variables in this MIB relate to SDLC ports and link stations
   only.  Any variable relating to higher-layer entities in SNA such as
   Physical Units (PU) and Logical Units (LU) are found in the SNA NAU
   MIB [4].

2.2.  Row Creation Mechanism

   Row creation mechanism for the sdlcLSAdminTable is based on the use
   of the RowStatus object.  It follows the rules for the use in SNMPv1
   context proposed in the memo "Row creation with SNMPv1" [5].  Before
   accepting the destroy value for an entry, an agent has to verify the
   operational state of the corresponding entry in the sdlcLSOperTable
   entry.



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2.3.  Relationship to the Interfaces Group

   This memo shall conform to the recommendations of [6].

   The SDLC layer of each SDLC Port shall be modeled by a row in the
   ifTable with an ifType using the IANA assigned number for SDLC (17).
   Each SDLC port interface must comply with the following conformance
   groups in [6]:

     - ifGeneralGroup
     - ifStackGroup
     - ifPacketGroup

   An implementation may optionally comply with the ifTestGroup defined
   in that memo to execute vendor specific tests.  An example of this
   would be to perform LPDA test functions.

   The SDLC port's relation with its physical, or lower-layer interface
   (i.e., RS-232, V.35, etc.) shall be modeled by a row in the
   ifStackTable with the ifStackHigherLayer pointing to the SDLC port
   ifTable instance and the ifStackLowerLayer pointing to the physical
   media-specific ifTable instance.  The media-specific objects of these
   lower-layer interfaces will, of course, be described in their
   respective MIBs (i.e., [1]).

   The following table provides specific implementation guidelines for
   all the interface group objects listed in the conformance tables
   above.

Object              Use for an SDLC Port

ifIndex             Each SDLC port is represented by an ifEntry. All
                    SDLC port tables shall be indexed by ifIndex.

ifDescr             Description of the SDLC port.

ifType              The IANA value reserved for SDLC - 17.

ifMtu               Refer to [6].

ifSpeed             This object shall reflect the value of the
                    corresponding object in the ifEntry of the
                    associated lower-layer interface.

ifPhysAddress       A string denoting the physical location of the SDLC
                    port within its node.  This shall have unique
                    significance within each implementing node.




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ifAdminStatus       This object shall reflect the value of the
                    corresponding object in the ifEntry of the
                    associated lower-layer interface.

ifOperStatus        This object shall reflect the value of the
                    corresponding object in the ifEntry of the
                    associated lower-layer interface.

ifLastChange        Refer to [6].

ifInOctets          Refer to [6].

ifInUcastPkts       This object shall count packets received from a
                    specific SDLC poll address.  Packets for the SDLC
                    broadcast address of x'FF' are not counted.

ifInDiscards        Refer to [6].

ifInErrors          Refer to [6].  Specific counters for these errors
                    are kept in the sdlcPortStatsTable.

ifInUnknownProtos   This counter shall return zero for SDLC ports.

ifOutOctets         Refer to [6].

ifOutUcastPkts      This object shall count packets transmitted to a
                    specific SDLC poll address (not x'FF').

ifOutDiscards       Refer to [6].

ifOutErrors         Refer to [6].  Specific counters for these errors
                    are kept in the sdlcPortStatsTable.

ifName              The textual name of the SDLC port or an octet string
                    of zero length.

ifInMulticastPkts   The value is 0 (not applicable to the SDLC layer).

ifInBroadcastPkts   This object shall count packets received on this
                    interface addressed to the SDLC broadcast address
                    (x'FF').  Only point-to-point ports supporting a
                    secondary switched station should return non-zero
                    values.

ifOutMulticastPkts  The value is 0 (not applicable to the SDLC layer).

ifOutBroadcastPkts  This object shall count packets transmitted on this
                    interface which were addressed to the SDLC broadcast



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                    address (x'FF').  Only point-to-point ports
                    supporting a primary switched station should
                    return non-zero values.

ifHC*               Not part of the conformance group.

ifLinkUpDownTrapEnable
                    Refer to [6].  Default is disabled (2).

ifHighSpeed         Refer to [6].

ifPromiscuousMode   Should return false if this interface receives only
                    packets addressed to its SDLC poll address(es).
                    However, in certain implementations, the lower-layer
                    interface shall present all frames to the SDLC port
                    regardless of the poll address.  Such frames may be
                    the result of a misconfigured peer or the secondary
                    end of a multipoint connection.  Such
                    implementations should return true for this
                    object.

ifConnectorPresent  Set to 'false'.

ifStackHigherLayer  For each SDLC port there will be an ifStackEntry
                    with this object's value referring to the ifIndex of
                    the SDLC port's ifEntry for the SDLC layer.

ifStackLowerLayer   For each SDLC port there will be an ifStackEntry
                    with this object's value referring to the ifIndex of
                    the physical layer interface's ifEntry for that SDLC
                    port.

ifStackStatus       Refer to [6].


















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3.  Definitions

SNA-SDLC-MIB DEFINITIONS ::= BEGIN

IMPORTS
    MODULE-IDENTITY, OBJECT-TYPE, NOTIFICATION-TYPE,
    Counter32, Integer32, TimeTicks
        FROM SNMPv2-SMI
    DisplayString, RowStatus, TimeInterval
        FROM SNMPv2-TC
    MODULE-COMPLIANCE, OBJECT-GROUP
        FROM SNMPv2-CONF
    mib-2, ifIndex, ifAdminStatus, ifOperStatus
        FROM RFC1213-MIB;


snaDLC MODULE-IDENTITY
        LAST-UPDATED  "9411150000Z"
        ORGANIZATION  "IETF SNA DLC MIB Working Group"
        CONTACT-INFO
                "        Wayne Clark

                 Postal: cisco Systems, Inc.
                         3100 Smoketree Ct.
                         Suite 1000
                         Raleigh, NC 27604
                         US

                    Tel: +1 919 878 6958

                 E-Mail: wclark@cisco.com"

        DESCRIPTION
                "This is the MIB module for objects used to
                 manage SDLC devices."

::= { mib-2 41 }

--
--  The following data link controls are modelled in this MIB module:
--
--     1. SDLC
--

sdlc        OBJECT IDENTIFIER ::= { snaDLC 1 }






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--
--  THE SDLC GROUP
--  ==============
--
--  The following resources are modelled in the SDLC group of this
--  MIB module:
--
--     1. PORTS
--     2. LINK STATIONS

sdlcPortGroup OBJECT IDENTIFIER ::= { sdlc 1 } -- Physical Ports
sdlcLSGroup   OBJECT IDENTIFIER ::= { sdlc 2 } -- Logical Link Stations

--
--  THE SDLC PORT GROUP
--  ===================
--
--  The following classes of information is modelled for each SDLC port:
--
--     1.  ADMINISTRATIVE ( read/write)
--     2.  OPERATIONAL    ( read-only)
--     3.  STATISTICS     ( read-only)

--  Information not found in this group is found in tables described in
--  the following RFCs:
--
--    1.  RFC1213  - MIB-II
--
--            TABLE                      INDEX
--            ====================       ====================
--        a.  ifTable                    ifIndex
--
--    2.  RFC1659  - The RS232-like MIB
--
--            TABLE                      INDEX
--            ====================       ====================
--        a.  rs232PortTable             rs232PortIndex
--        b.  rs232SyncPortTable         rs232SyncPortIndex
--        c.  rs232InSigTable            rs232InSigPortIndex,
--                                       rs232InSigName
--        d.  rs232OutSigTable           rs232OutSigPortIndex,
--                                       rs232OutSigName
--     ** e.  rs232AsyncPortTable        rs232AsyncPortIndex
--
--     ** rs232AsyncPortTable for ISO 3309.3 ( Start-Stop SDLC).






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--  *************************************************************
--  *                                                           *
--  *           THE SDLC PORT ADMINISTRATIVE TABLE              *
--  *                                                           *
--  *************************************************************

sdlcPortAdminTable  OBJECT-TYPE
                    SYNTAX      SEQUENCE OF SdlcPortAdminEntry
                    MAX-ACCESS  not-accessible
                    STATUS      current
                    DESCRIPTION
                        "This table contains objects that can be
                        changed to manage an SDLC port.    Changing one
                        of these parameters may take effect in the
                        operating port immediately or may wait until
                        the interface is restarted depending on the
                        details of the implementation.

                        Most of the objects in this read-write table
                        have corresponding read-only objects in the
                        sdlcPortOperTable that return the current
                        operating value.

                        The operating values may be different from
                        these configured values if  a configured
                        parameter was changed after the interface was
                        started."
                     ::= { sdlcPortGroup 1 }

sdlcPortAdminEntry  OBJECT-TYPE
                    SYNTAX      SdlcPortAdminEntry
                    MAX-ACCESS  not-accessible
                    STATUS      current
                    DESCRIPTION
                        "A list of configured values for an SDLC port."
                    INDEX   { ifIndex }
                    ::= { sdlcPortAdminTable 1 }

SdlcPortAdminEntry  ::= SEQUENCE
{
        sdlcPortAdminName           DisplayString,
        sdlcPortAdminRole           INTEGER,
        sdlcPortAdminType           INTEGER,
        sdlcPortAdminTopology       INTEGER,
        sdlcPortAdminISTATUS        INTEGER,
        sdlcPortAdminACTIVTO        TimeInterval,
        sdlcPortAdminPAUSE          TimeInterval,
        sdlcPortAdminSERVLIM        Integer32,



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        sdlcPortAdminSlowPollTimer  TimeInterval
}

sdlcPortAdminName   OBJECT-TYPE
                    SYNTAX      DisplayString (SIZE (1..10))
                    MAX-ACCESS  read-write
                    STATUS      current
                    DESCRIPTION
                        "An octet string that defines the physical port
                        to which this interface is assigned.  It has
                        implementation-specific significance. Its value
                        shall be unique within the administered
                        system.  It must contain only ASCII printable
                        characters.  Should an implementation choose to
                        accept a write operation  for this object, it
                        causes the logical port definition associated
                        with the table instance to be moved to  a
                        different physical port.  A write operation
                        shall not take effect until the port is cycled
                        inactive."
                    ::= { sdlcPortAdminEntry 1 }

sdlcPortAdminRole   OBJECT-TYPE
                    SYNTAX      INTEGER
                    {
                        primary(1),
                        secondary(2),
                        negotiable(3)
                    }
                    MAX-ACCESS  read-write
                    STATUS      current
                    DESCRIPTION
                        "This object describes the role that the link
                        station shall assume the next time a connection
                        is established.

                        Even though this is defined as a port object,
                        it is a link station attribute in the sense
                        that a role is per link station.  However, it
                        is not possible to vary link station roles on a
                        particular port.  For example, if an SDLC port
                        is configured to primary, all link stations on
                        that port must be primary."
                    ::= { sdlcPortAdminEntry 2 }

sdlcPortAdminType   OBJECT-TYPE
                    SYNTAX      INTEGER
                    {



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                         leased(1),
                         switched(2)
                    }
                    MAX-ACCESS  read-write
                    STATUS      current
                    DESCRIPTION
                        "This parameter defines whether the SDLC port
                        is to connect to a leased or switched line.  A
                        write operation to this administrative  value
                        shall not take effect until the SDLC port has
                        been cycled inactive."
                    DEFVAL { leased }
                    ::= { sdlcPortAdminEntry 3 }

sdlcPortAdminTopology  OBJECT-TYPE
                    SYNTAX      INTEGER
                    {
                         pointToPoint(1),
                         multipoint(2)
                    }
                    MAX-ACCESS  read-write
                    STATUS      current
                    DESCRIPTION
                        "This parameter defines whether the SDLC port is
                        capable of operating in either a point-to-point
                        or multipoint topology.

                        sdlcPortAdminTopology == multipoint implies the
                        port can also operate in a point-to-point
                        topology.  sdlcPortAdminTopology ==
                        pointToPoint does not imply the port can
                        operate in a multipoint topology.

                        A write operation to this administrative value
                        shall not take effect until the SDLC port has
                        been cycled inactive."
                    DEFVAL { pointToPoint }
                    ::= { sdlcPortAdminEntry 4 }

sdlcPortAdminISTATUS  OBJECT-TYPE
                    SYNTAX      INTEGER
                    {
                         inactive(1),
                         active(2)
                    }
                    MAX-ACCESS  read-write
                    STATUS      current
                    DESCRIPTION



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                        "This parameter controls the initial value of
                        the administrative status, ifAdminStatus, of
                        this SDLC port at port start-up.  Depending
                        on the implementation, a write operation to
                        this administrative object may not take effect
                        until the SDLC port has been cycled inactive."
                    DEFVAL { active }
                    ::= { sdlcPortAdminEntry 5 }

sdlcPortAdminACTIVTO    OBJECT-TYPE
                    SYNTAX      TimeInterval
                    MAX-ACCESS  read-write
                    STATUS      current
                    DESCRIPTION
                        "This parameter defines the period of time (in
                        1/100ths of a second) that the port will allow a
                        switched line to remain inactive before
                        disconnecting.  A switched line is considered
                        to be inactive if there are no I-Frames being
                        transferred.  A value of zero indicates no
                        timeout.  Depending on the implementation, a
                        write operation to this administered value may
                        not take effect until the port is cycled
                        inactive.

                        This object only has meaning for SDLC ports
                        where sdlcPortAdminType == switched

                        The object descriptor contains the name of an
                        NCP configuration parameter, ACTIVTO.  Please
                        note that the value of this object represents
                        1/100ths of a second while the NCP ACTIVTO is
                        represented in seconds."
                    DEFVAL { 0 }
                    ::= { sdlcPortAdminEntry 6 }

sdlcPortAdminPAUSE  OBJECT-TYPE
                    SYNTAX      TimeInterval
                    MAX-ACCESS  read-write
                    STATUS      current
                    DESCRIPTION
                        "This object defines the minimum elapsed time
                        (in 1/100ths of a second) between any two
                        traversals of the poll list for a primary SDLC
                        port.  Depending on the implementation, a write
                        operation to this administered value  may not
                        take effect until the port is cycled inactive.




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                        The object descriptor contains the name of an
                        NCP configuration parameter, PAUSE.  Please
                        note that the value of this object represents
                        1/100ths of a second while the NCP PAUSE is
                        represented in 1/10ths of a second.

                        This object only has meaning for SDLC ports
                        where sdlcPortAdminRole == primary "
                    DEFVAL { 200 }
                    ::= { sdlcPortAdminEntry 7 }

sdlcPortAdminSERVLIM OBJECT-TYPE
                    SYNTAX      Integer32
                    MAX-ACCESS  read-write
                    STATUS      current
                    DESCRIPTION
                        "This object defines the number of times the
                        active poll list will be traversed before
                        polling a station on the slow poll list for a
                        primary, multipoint SDLC port.  Depending  on
                        the implementation, a write operation to this
                        administered value  may not take effect until
                        the port is cycled inactive.

                        This object only has meaning for SDLC ports
                        where
                            sdlcPortAdminRole == primary
                        and
                            sdlcPortAdminTopology == multipoint "
                    DEFVAL { 20 }
                    ::= { sdlcPortAdminEntry 8 }

sdlcPortAdminSlowPollTimer OBJECT-TYPE
                    SYNTAX      TimeInterval
                    MAX-ACCESS  read-write
                    STATUS      current
                    DESCRIPTION
                        "This object describes the elapsed time (in
                        1/100ths of a second) between polls for failed
                        secondary link station addresses.  Depending
                        on the implementation, a write operation to
                        this administered value  may not take effect
                        until the port is cycled inactive.

                        This object only has meaning for SDLC ports
                        where
                            sdlcPortAdminRole == primary
                        and



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                            sdlcPortAdminTopology == multipoint "
                    DEFVAL { 2000 }
                    ::= { sdlcPortAdminEntry 9 }

--  *************************************************************
--  *                                                           *
--  *                THE SDLC PORT OPERATIONAL TABLE            *
--  *                                                           *
--  *************************************************************

sdlcPortOperTable   OBJECT-TYPE
                    SYNTAX      SEQUENCE OF SdlcPortOperEntry
                    MAX-ACCESS  not-accessible
                    STATUS      current
                    DESCRIPTION
                        "This table contains current SDLC port
                        parameters.  Many of these objects have
                        corresponding objects inthe sdlcPortAdminTable."
                    ::= { sdlcPortGroup 2 }

sdlcPortOperEntry   OBJECT-TYPE
                    SYNTAX      SdlcPortOperEntry
                    MAX-ACCESS  not-accessible
                    STATUS      current
                    DESCRIPTION
                        "Currently set parameters for a specific SDLC
                        port."
                    INDEX   { ifIndex }
                    ::= { sdlcPortOperTable 1 }

SdlcPortOperEntry   ::= SEQUENCE
{
        sdlcPortOperName                DisplayString,
        sdlcPortOperRole                INTEGER,
        sdlcPortOperType                INTEGER,
        sdlcPortOperTopology            INTEGER,
        sdlcPortOperISTATUS             INTEGER,
        sdlcPortOperACTIVTO             TimeInterval,
        sdlcPortOperPAUSE               TimeInterval,
        sdlcPortOperSlowPollMethod      INTEGER,
        sdlcPortOperSERVLIM             Integer32,
        sdlcPortOperSlowPollTimer       TimeInterval,
        sdlcPortOperLastModifyTime      TimeTicks,
        sdlcPortOperLastFailTime        TimeTicks,
        sdlcPortOperLastFailCause       INTEGER
}

sdlcPortOperName    OBJECT-TYPE



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                    SYNTAX      DisplayString (SIZE (1..8))
                    MAX-ACCESS  read-only
                    STATUS      current
                    DESCRIPTION
                        "An octet string that describes the physical
                        port to which this interface is currently
                        attached.  It has  implementation-specific
                        significance."
                    ::= { sdlcPortOperEntry 1 }

sdlcPortOperRole    OBJECT-TYPE
                    SYNTAX      INTEGER
                    {
                        primary(1),
                        secondary(2),
                        undefined(3)
                    }
                    MAX-ACCESS  read-only
                    STATUS      current
                    DESCRIPTION
                        "This object describes the role that the link
                        station has assumed on this connection.

                        Even though this is defined as a port object,
                        it is a link station attribute in the sense
                        that a role is per link station.  However, it
                        is not possible to vary link station roles on a
                        particular port.  For example, if an SDLC port
                        is configured to primary, all link stations on
                        that port must be primary.

                        The value of sdlcPortOperRole is undefined(3)
                        whenever the link station role has not yet been
                        established by the mode setting command."
                    ::= { sdlcPortOperEntry 2 }

sdlcPortOperType    OBJECT-TYPE
                    SYNTAX      INTEGER
                    {
                         leased(1),
                         switched(2)
                    }
                    MAX-ACCESS  read-only
                    STATUS      current
                    DESCRIPTION
                        "This parameter defines whether the SDLC port
                        is currently operating as though connected to a
                        leased or switched line."



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                    ::= { sdlcPortOperEntry 3 }

sdlcPortOperTopology  OBJECT-TYPE
                    SYNTAX      INTEGER
                    {
                         pointToPoint(1),
                         multipoint(2)
                    }
                    MAX-ACCESS  read-only
                    STATUS      current
                    DESCRIPTION
                        "This parameter defines whether the SDLC port is
                        currently operating in a point-to-point or
                        multipoint topology."
                    ::= { sdlcPortOperEntry 4 }

sdlcPortOperISTATUS OBJECT-TYPE
                    SYNTAX      INTEGER
                    {
                         inactive(1),
                         active(2)
                    }
                    MAX-ACCESS  read-only
                    STATUS      current
                    DESCRIPTION
                        "This parameter describes the initial value of
                        the administrative status, ifAdminStatus, of
                        this SDLC port at last port start-up."
                    ::= { sdlcPortOperEntry 5 }


sdlcPortOperACTIVTO OBJECT-TYPE
                    SYNTAX      TimeInterval
                    MAX-ACCESS  read-only
                    STATUS      current
                    DESCRIPTION
                        "This parameter defines the period of time (in
                        100ths of a second) that the port will allow a
                        switched line to remain inactive before
                        disconnecting.  A switched line is considered
                        to be inactive if there are no I-Frames being
                        transferred.

                        The object descriptor contains the name of an
                        NCP configuration parameter, ACTIVTO.  Please
                        note that the value of this object represents
                        1/100ths of a second while the NCP ACTIVTO is
                        represented in seconds.



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                        A value of zero indicates no timeout."
                    ::= { sdlcPortOperEntry 6 }

sdlcPortOperPAUSE   OBJECT-TYPE
                    SYNTAX      TimeInterval
                    MAX-ACCESS  read-only
                    STATUS      current
                    DESCRIPTION
                        "This object describes the current minimum
                        elapsed time (in 1/100ths of a second) between
                        any two traversals of the poll list for a
                        primary SDLC port.

                        The object descriptor contains the name of an
                        NCP configuration parameter, PAUSE.  Please
                        note that the value of this object represents
                        1/100ths of a second while the NCP PAUSE is
                        represented in 1/10ths of a second.

                        This object only has meaning for SDLC ports
                        where
                            sdlcPortAdminRole == primary "
                    ::= { sdlcPortOperEntry 7 }

sdlcPortOperSlowPollMethod OBJECT-TYPE
                    SYNTAX      INTEGER
                    {
                         servlim(1),
                         pollpause(2),
                         other(3)
                    }
                    MAX-ACCESS  read-only
                    STATUS      current
                    DESCRIPTION
                        "This object defines the exact method that is in
                        effect for periodically polling failed secondary
                        link station addresses.

                        If sdlcPortOperSlowPollMethod == servlim, then
                        sdlcPortOperSERVLIM defines the actual polling
                        characteristics.

                        If sdlcPortOperSlowPollMethod == pollpause,
                        then sdlcPortOperSlowPollTimer defines the
                        actual polling characteristics.

                        If sdlcPortOperSlowPollMethod == other, then
                        the polling characteristics are modeled in



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RFC 1747              SNADLC SDLC MIB using SMIv2           January 1995


                        vendor-specific objects.

                        This object only has meaning for SDLC ports
                        where
                            sdlcPortOperRole == primary
                        and
                            sdlcPortOperTopology == multipoint "
                    ::= { sdlcPortOperEntry 8 }

sdlcPortOperSERVLIM OBJECT-TYPE
                    SYNTAX      Integer32
                    MAX-ACCESS  read-only
                    STATUS      current
                    DESCRIPTION
                        "This object describes the number of times the
                        active poll list is currently being traversed
                        before polling a station on the slow poll list
                        for a primary, multipoint SDLC port.

                        This object only has meaning for SDLC ports
                        where
                            sdlcPortOperRole == primary
                        and
                            sdlcPortOperTopology == multipoint "
                    ::= { sdlcPortOperEntry 9 }

sdlcPortOperSlowPollTimer OBJECT-TYPE
                    SYNTAX      TimeInterval
                    MAX-ACCESS  read-only
                    STATUS      current
                    DESCRIPTION
                        "This object describes the elapsed time (in
                        1/100ths of a second) between polls for failed
                        secondary link station addresses.

                        This object only has meaning for SDLC ports
                        where
                            sdlcPortOperRole == primary
                        and
                            sdlcPortOperTopology == multipoint "
                    ::= { sdlcPortOperEntry 10 }

sdlcPortOperLastModifyTime    OBJECT-TYPE
                    SYNTAX      TimeTicks
                    MAX-ACCESS  read-only
                    STATUS      current
                    DESCRIPTION
                        "This object describes the value of sysUpTime



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RFC 1747              SNADLC SDLC MIB using SMIv2           January 1995


                         when this port definition was last modified.
                         If the port has not been modified, then this
                         value shall be zero."
                    ::= { sdlcPortOperEntry 11 }

sdlcPortOperLastFailTime    OBJECT-TYPE
                    SYNTAX      TimeTicks
                    MAX-ACCESS  read-only
                    STATUS      current
                    DESCRIPTION
                        "This object describes the value of sysUpTime
                        when this SDLC port last failed.  If the port
                        has not failed, then this value shall be zero."
                    ::= { sdlcPortOperEntry 12 }

sdlcPortOperLastFailCause    OBJECT-TYPE
                    SYNTAX      INTEGER
                    {
                        undefined(1),
                        physical(2)
                    }
                    MAX-ACCESS  read-only
                    STATUS      current
                    DESCRIPTION
                        "This enumerated object describes the cause of
                        the last failure of this SDLC port.  If the
                        port has not failed, then this object has a
                        value of undefined(1)."
                    DEFVAL { undefined }
                    ::= { sdlcPortOperEntry 13 }





















Hilgeman, Nix, Bartky & Clark                                  [Page 19]


RFC 1747              SNADLC SDLC MIB using SMIv2           January 1995


--  *************************************************************
--  *                                                           *
--  *           THE SDLC PORT STATISTICS TABLE                  *
--  *                                                           *
--  *************************************************************

sdlcPortStatsTable  OBJECT-TYPE
                    SYNTAX      SEQUENCE OF SdlcPortStatsEntry
                    MAX-ACCESS  not-accessible
                    STATUS      current
                    DESCRIPTION
                        "Each entry in this table contains statistics
                        for a specific SDLC port."
                     ::= { sdlcPortGroup 3 }

sdlcPortStatsEntry  OBJECT-TYPE
                    SYNTAX      SdlcPortStatsEntry
                    MAX-ACCESS  not-accessible
                    STATUS      current
                    DESCRIPTION
                        "A list of statistics for an SDLC port."
                    INDEX   { ifIndex }
                    ::= { sdlcPortStatsTable 1 }

SdlcPortStatsEntry ::= SEQUENCE
{
        sdlcPortStatsPhysicalFailures Counter32,
        sdlcPortStatsInvalidAddresses Counter32,
        sdlcPortStatsDwarfFrames      Counter32,
        sdlcPortStatsPollsIn          Counter32,
        sdlcPortStatsPollsOut         Counter32,
        sdlcPortStatsPollRspsIn       Counter32,
        sdlcPortStatsPollRspsOut      Counter32,
        sdlcPortStatsLocalBusies      Counter32,
        sdlcPortStatsRemoteBusies     Counter32,
        sdlcPortStatsIFramesIn        Counter32,
        sdlcPortStatsIFramesOut       Counter32,
        sdlcPortStatsOctetsIn         Counter32,
        sdlcPortStatsOctetsOut        Counter32,
        sdlcPortStatsProtocolErrs     Counter32,
        sdlcPortStatsActivityTOs      Counter32,
        sdlcPortStatsRNRLIMITs        Counter32,
        sdlcPortStatsRetriesExps      Counter32,
        sdlcPortStatsRetransmitsIn    Counter32,
        sdlcPortStatsRetransmitsOut   Counter32
}

sdlcPortStatsPhysicalFailures OBJECT-TYPE



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RFC 1747              SNADLC SDLC MIB using SMIv2           January 1995


                    SYNTAX      Counter32
                    MAX-ACCESS  read-only
                    STATUS      current
                    DESCRIPTION
                        "This object reflects the total number of times
                        this port has failed due to its physical media
                        since port startup.  At port startup time,
                        this object must be initialized to zero."
                    ::= { sdlcPortStatsEntry 1 }

sdlcPortStatsInvalidAddresses OBJECT-TYPE
                    SYNTAX      Counter32
                    MAX-ACCESS  read-only
                    STATUS      current
                    DESCRIPTION
                        "This object reflects the total number of
                        frames received by this port with invalid link
                        station addresses."
                    ::= { sdlcPortStatsEntry 2 }

sdlcPortStatsDwarfFrames OBJECT-TYPE
                    SYNTAX      Counter32
                    MAX-ACCESS  read-only
                    STATUS      current
                    DESCRIPTION
                        "This object reflects the total number of
                        frames received by this port which were
                        delivered intact by the physical layer but were
                        too short to be legal.

                        Ignoring the frame check sequence (FCS), a
                        frame is considered to be too short if it
                        is less than 2 bytes for sdlcLSOperMODULO of
                        eight, or if it is less than 3 bytes for
                        sdlcLSOperMODULO of onetwentyeight."

                    ::= { sdlcPortStatsEntry 3 }

sdlcPortStatsPollsIn OBJECT-TYPE
                    SYNTAX      Counter32
                    MAX-ACCESS  read-only
                    STATUS      current
                    DESCRIPTION
                         "This object reflects the total number of polls
                         received by this port since the port was
                         created."

                    ::= { sdlcPortStatsEntry 4 }



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RFC 1747              SNADLC SDLC MIB using SMIv2           January 1995


sdlcPortStatsPollsOut OBJECT-TYPE
                    SYNTAX      Counter32
                    MAX-ACCESS  read-only
                    STATUS      current
                    DESCRIPTION
                         "This object reflects the total number of polls
                         sent by this port since the port was created."

                    ::= { sdlcPortStatsEntry 5 }

sdlcPortStatsPollRspsIn OBJECT-TYPE
                    SYNTAX      Counter32
                    MAX-ACCESS  read-only
                    STATUS      current
                    DESCRIPTION
                         "This object reflects the total number of poll
                         responses received by this port since the port
                         was created."

                    ::= { sdlcPortStatsEntry 6 }

sdlcPortStatsPollRspsOut OBJECT-TYPE
                    SYNTAX      Counter32
                    MAX-ACCESS  read-only
                    STATUS      current
                    DESCRIPTION
                         "This object reflects the total number of poll
                         responses sent by this port since the port was
                         created."

                    ::= { sdlcPortStatsEntry 7 }

sdlcPortStatsLocalBusies OBJECT-TYPE
                    SYNTAX      Counter32
                    MAX-ACCESS  read-only
                    STATUS      current
                    DESCRIPTION
                         "This object reflects the total number of
                         times that the local SDLC link stations on
                         this port have entered a busy state (RNR).
                         This object is initialized to zero when the
                         port is created."
                    ::= { sdlcPortStatsEntry 8 }

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



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RFC 1747              SNADLC SDLC MIB using SMIv2           January 1995


                    DESCRIPTION
                         "This object reflects the total number of
                         times that the adjacent (i.e., remote) SDLC
                         link stations on this port have entered a busy
                         state (RNR).  This object is initialized to
                         zero when the port is created."
                    ::= { sdlcPortStatsEntry 9 }

sdlcPortStatsIFramesIn OBJECT-TYPE
                    SYNTAX      Counter32
                    MAX-ACCESS  read-only
                    STATUS      current
                    DESCRIPTION
                         "This object reflects the total number of
                         I-Frames that have been received by SDLC link
                         stations on this port.  This object is
                         initialized to zero when the port is created."
                    ::= { sdlcPortStatsEntry 10 }

sdlcPortStatsIFramesOut OBJECT-TYPE
                    SYNTAX      Counter32
                    MAX-ACCESS  read-only
                    STATUS      current
                    DESCRIPTION
                         "This object reflects the total number of
                         I-Frames that have been transmitted by SDLC
                         link stations on this port.  This object is
                         initialized to zero when the port is created."
                    ::= { sdlcPortStatsEntry 11 }

sdlcPortStatsOctetsIn OBJECT-TYPE
                    SYNTAX      Counter32
                    MAX-ACCESS  read-only
                    STATUS      current
                    DESCRIPTION
                         "This object reflects the total octets
                         received from adjacent SDLC link stations on
                         this port.  This object covers the address,
                         control, and information field of I-Frames
                         only.  This object is initialized to zero when
                         the port is created."
                    ::= { sdlcPortStatsEntry 12 }

sdlcPortStatsOctetsOut OBJECT-TYPE
                    SYNTAX      Counter32
                    MAX-ACCESS  read-only
                    STATUS      current
                    DESCRIPTION



Hilgeman, Nix, Bartky & Clark                                  [Page 23]


RFC 1747              SNADLC SDLC MIB using SMIv2           January 1995


                         "This object reflects the total octets
                         transmitted to adjacent SDLC link stations on
                         this port.  This object covers the address,
                         control, and information field of I-Frames
                         only.  This object is initialized to zero when
                         the port is created."
                    ::= { sdlcPortStatsEntry 13 }

sdlcPortStatsProtocolErrs OBJECT-TYPE
                    SYNTAX      Counter32
                    MAX-ACCESS  read-only
                    STATUS      current
                    DESCRIPTION
                         "This object reflects the total number of
                         times that the SDLC link stations on this port
                         have deactivated the link as a result of
                         having received a protocol violation from the
                         adjacent link station.  This object is
                         initialized to zero when the port is created."
                    ::= { sdlcPortStatsEntry 14 }

sdlcPortStatsActivityTOs OBJECT-TYPE
                    SYNTAX      Counter32
                    MAX-ACCESS  read-only
                    STATUS      current
                    DESCRIPTION
                         "This object reflects the total number of
                         times that the SDLC link stations on this port
                         have deactivated the link as a result of no
                         activity on the link.  This object is
                         initialized to zero when the port is created."
                    ::= { sdlcPortStatsEntry 15 }

sdlcPortStatsRNRLIMITs OBJECT-TYPE
                    SYNTAX      Counter32
                    MAX-ACCESS  read-only
                    STATUS      current
                    DESCRIPTION
                         "This object reflects the total number of
                         times that the SDLC link stations on this port
                         have deactivated the link as a result of its
                         RNRLIMIT timer expiring.  This object is
                         initialized to zero when the port is created."
                    ::= { sdlcPortStatsEntry 16 }

sdlcPortStatsRetriesExps OBJECT-TYPE
                    SYNTAX      Counter32
                    MAX-ACCESS  read-only



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RFC 1747              SNADLC SDLC MIB using SMIv2           January 1995


                    STATUS      current
                    DESCRIPTION
                         "This object reflects the total number of
                         times that the SDLC link stations on this port
                         have deactivated the link as a result of a
                         retry sequence being exhausted.  This object
                         is initialized to zero when the port is
                         created."
                    ::= { sdlcPortStatsEntry 17 }

sdlcPortStatsRetransmitsIn OBJECT-TYPE
                    SYNTAX      Counter32
                    MAX-ACCESS  read-only
                    STATUS      current
                    DESCRIPTION
                         "This object reflects the total number of
                         I-Frames retransmitted by remote link stations
                         for all SDLC link stations on this port.  This
                         object is initialized to zero when the port is
                         created."
                    ::= { sdlcPortStatsEntry 18 }

sdlcPortStatsRetransmitsOut OBJECT-TYPE
                    SYNTAX      Counter32
                    MAX-ACCESS  read-only
                    STATUS      current
                    DESCRIPTION
                         "This object reflects the total number of
                         I-Frames retransmitted by all local SDLC link
                         stations on this port.  This object is
                         initialized to zero when the port is created."
                    ::= { sdlcPortStatsEntry 19 }



















Hilgeman, Nix, Bartky & Clark                                  [Page 25]


RFC 1747              SNADLC SDLC MIB using SMIv2           January 1995


--
--  THE SDLC LINK STATION GROUP
--  ===========================
--

--  The following classes of information is modelled for each SDLC link
--  station:
--
--     1.  ADMINISTRATIVE ( read-write)
--     2.  OPERATIONAL    ( read-only)
--     3.  STATISTICS     (