    Network Working Group                                         J. Saperia
    Request for Comments: 1289                 Digital Equipment Corporation
                                                               December 1991

                         DECnet Phase IV MIB Extensions

    Status of this Memo

       This memo is an extension to the SNMP MIB.  This RFC specifies an IAB
       standards track protocol for the Internet community, and requests
       discussion and suggestions for improvements.  Please refer to the
       current edition of the "IAB Official Protocol Standards" for the
       standardization state and status of this protocol.  Distribution of
       this memo is unlimited.

    Table of Contents

       Abstract..........................................................  1
       1. Introduction...................................................  1
       2. Selected Objects...............................................  2
       3. Objects........................................................  3
       3.1 Format of Definitions.........................................  3
       3.2 Textual Conventions...........................................  4
       4. Object Definitions.............................................  4
       5. Acknowledgements............................................... 63
       6. References..................................................... 63
       7. Security Considerations........................................ 64
       8. Author's Address............................................... 64

    Abstract

       This memo defines a set of DECnet Phase IV extensions that have been
       created for the Internet MIB.  When used in conjunction with the
       structure of management information (RFC 1155), the management
       information base for network management of TCP/IP-based internets
       (RFC 1213) and the Simple Network Management Protocol (RFC 1157), it
       will be possible to provide integrated network management of combined
       TCP/IP and DECnet Phase IV based internets.  This document was
       produced by the DECnet Phase IV MIB working group of the Internet
       Engineering Task Force (IETF).

    1.  Introduction

       With the adoption of The Simple Network Management Protocol (RFC
       1157), the management information base for network management of
       TCP/IP-based internets (RFC 1213), and the structure of management
       information (RFC 1155), by the Internet, and a large number of vendor

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       implementations of these standards in commercially available
       products, it became possible to provide a higher level of effective
       network management in TCP/IP-based internets than previously
       available. With the growth in the use of these standards, network
       managers desired to use this environment as a base for providing
       integrated network management of multi-protocol networks.

       DECnet Phase IV is one widely used protocol which often coexists in
       IP-based internets. This memo provides the mechanisms by which IP-
       based management stations can effectively manage DECnet Phase IV
       based systems (especially router products) in an integrated fashion
       through the use of the standard Internet SMI, MIB and Simple Network
       Management Protocol.

       DECnet Phase IV objects have been defined to be used in conjunction
       with the Internet MIB to allow access and control of these new
       objects by the Internet community. Additional support for other
       DECnet-based protocols such as RBMS (remote bridge management
       software) or other Digital Equipment Corporation Specific Hardware
       platforms is not included in this document.

    2.  Selected Objects

       The objects included in this memo have been created from the DIGITAL
       Network Architecture Network Management Functional Specification
       Version 4.0.0 Dated July 1983. An attempt has been made to provide a
       reasonable ordering of these variables into groups. These groups are:

         o  System Group

         o  Network Management Group

         o  Session Group

         o  End Group

         o  Routing Group

         o  Circuit Group

         o  DDCMP Group

         o  DDCMP Multipoint Control Group

         o  Ethernet Group

         o  Counters Group

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         o  Adjacency Group

         o  Line Group

         o  Non Broadcast Line Group

         o  Area Group

       An effort has also been made to preserve the original syntax of the
       object wherever possible, for example, a DECnet Phase IV object is
       Executor State. This was originally coded as a NICE (Network
       Information and Control Exchange) data type which is a Coded single
       field object of 1 byte in length. When converted for inclusion into
       the Internet MIB using the Internet SMI, it became an enumerated
       integer.

    3.  Objects

       All objects in this memo are described using the standard Internet
       SMI and BER of RFC 1155. A complete description of an object will
       include the name, syntax and encoding. Just as with objects supported
       in the MIB (RFC 1156), an object name is identified with an object
       identifier which has been administratively assigned. This identifies
       an Object Type. When an object type is combined with a specific
       instance, the particular object is uniquely identified. The use of
       Object Descriptors in this memo is consistent with that of RFC 1156 -
       they are text strings meant to be read by humans. The descriptors
       have been taken from the original DIGITAL Network Architecture
       Network Management Functional Specification Version 4.0.0 Dated July
       1983 which defined DECnet Phase IV objects. These names were then
       massaged to put them in a form as consistent as possible with object
       type names listed in the standard Internet MIB. Object defintion
       information is also taken directly from the Network Architecture
       Network Managment Functional Specification cited above wherever
       possible. In this document, EXECUTOR is intended to reference only
       the DECnet software and is not intended to effect any other protocols
       which may be running on the system.

    3.1  Format of Definitions

       An object in this memo is specified by five fields of information:
       Object, Syntax, Definition, Access, and Status.

       The OBJECT is a textual name (OBJECT DESCRIPTOR) for that object type
       combined with an administratively obtained OBJECT IDENTIFIER.

       SYNTAX: For each object type, its abstract syntax is presented using
       the ASN.1 specified in RFC 1155.

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       DEFINITION: A general description of the object type. Its original
       purpose in the DECnet Phase IV environment is given so that all
       implementers and users will consistently interpret the information
       contained in each object type. Changes in format to make the object
       consistent with RFC 1155 are also noted.

       ACCESS: The standard access keywords supported in RFC 1156 are used.
       The keywords used in this MIB are: read-only, read-write, and, not-
       accessible.

       STATUS: The status field is used to describe with a single keyword
       whether the object type is mandatory or optional. Status keywords of
       obsolete and deprecated are not used in this memo since this is the
       first version of the DECnet Phase IV MIB.

    3.2  Textual Conventions

       New datatypes have been introduced as a textual conventions in this
       DECnet Phase IV MIB document. The purpose of these additions is to
       facilitate understanding of new objects in this MIB. No changes to
       the SMI or the SNMP are necessary to support these conventions which
       are described in 4.0 (Object Definitions).

    4.  Object Definitions

                RFC1289-phivMIB

                DEFINITIONS ::= BEGIN

                IMPORTS
                   Gauge
                      FROM RFC1155-SMI
                    OBJECT-TYPE
                       FROM RFC-1212
                    mib-2, DisplayString
                      FROM RFC1213-MIB;

           -- DECNet Phase-IV MIB

                phiv             OBJECT IDENTIFIER ::= { mib-2 18 }

           -- textual conventions

           PhivAddr ::= OCTET STRING (SIZE (2))
           -- This data type is intended as a short word representation of
           -- standard DECnet Phase IV addresses. DECnet addresses are
           -- hierarchically structured numbers assigned to a particular
           -- DECnet node. The address is structured so that the area

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           -- number is contained in the most significant 6 bits of the
           -- first octet.  The next 2 bits of the first octet contain
           -- the first two bits of the host address.  The remainder of
           -- the host address is contained in the second octet.

           PhivCounter ::= INTEGER
           -- This data type has been created for DECnet  counters.  These
           -- counters latch at their maximum specified value until either
           -- the system is restared, or they are reset to zero by the user
           -- or management software.

           -- groups in the decnetiv mib

                 phivSystem             OBJECT IDENTIFIER ::= { phiv 1 }
                 phivManagement         OBJECT IDENTIFIER ::= { phiv 2 }
                 session                OBJECT IDENTIFIER ::= { phiv 3 }
                 end                    OBJECT IDENTIFIER ::= { phiv 4 }
                 routing                OBJECT IDENTIFIER ::= { phiv 5 }
                 circuit                OBJECT IDENTIFIER ::= { phiv 6 }
                 ddcmp                  OBJECT IDENTIFIER ::= { phiv 7 }
                 control                OBJECT IDENTIFIER ::= { phiv 8 }
                 ethernet               OBJECT IDENTIFIER ::= { phiv 9 }
                 counters               OBJECT IDENTIFIER ::= { phiv 10 }
                 adjacency              OBJECT IDENTIFIER ::= { phiv 11 }
                 line                   OBJECT IDENTIFIER ::= { phiv 12 }
                 nonBroadcastLine       OBJECT IDENTIFIER ::= { phiv 14 }
                 area                   OBJECT IDENTIFIER ::= { phiv 15 }

           -- System Group

           -- The implementation of the System Group is mandatory for
           -- all systems.

           phivSystemState OBJECT-TYPE
                SYNTAX INTEGER {
                    on (1),
                    off (2),
                    shut (3),
                    restricted (4)
                }
                ACCESS read-write
                STATUS mandatory
                DESCRIPTION
                    "This represents the operational state of the executor
                    node.
                    The possible states are:
                    ON          Allows logical links.
                    OFF         Allows no new links, terminates existing

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                                links, and stops routing traffic through.
                    SHUT        Allows no new logical links, does not
                                destroy existing logical links, and goes
                                to the OFF state when all logical links are
                                gone.
                    RESTRICTED  Allows no new incoming logical links from
                                other nodes.

                    NOTE: These values are incremented by one compared to
                    the standard DECnet values in order to maintain
                    compliance with RFC 1155)."
                ::= { phivSystem 1 }

           phivExecIdent OBJECT-TYPE
               SYNTAX DisplayString ( SIZE (0..32) )
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This is a text string that describes the executor node
                   (for example, 'Research Lab').  The string is up to 32
                   characters of any type."
               ::= { phivSystem 2 }

           -- Network Management Group

           -- The implementation of the Network Management Group is
           -- mandatory for all systems which contain a DECnet style
           -- management version.

           phivMgmtMgmtVers OBJECT-TYPE
                SYNTAX DisplayString (SIZE (0..255) )
                ACCESS read-only
                STATUS mandatory
                DESCRIPTION
                    "This is the read-only Network Management Version,
                    consisting of the version number, the Engineering
                    Change Order (ECO) number, and the user ECO number
                    (for example, 3.0.0). This parameter applies to the
                    executor node only."
                ::= { phivManagement 1 }

           -- Session Layer Group

           -- The implementation of the Session Layer Group is mandatory for
           -- all systems that implement session layer communications.

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           phivSessionSystemName OBJECT-TYPE
               SYNTAX DisplayString ( SIZE (0..6) )
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Name to be associated with the node identification.
                   Only one name can be assigned to a node address or a
                   circuit identification. No name should be used more than
                   once in a DECnet network. Node-name is one to six upper
                   case alphanumeric characters with at least one alpha
                   character. A length of 0 indicates no name."
               ::= { session 1 }

           phivSessionInTimer OBJECT-TYPE
               SYNTAX INTEGER (0..65535)
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This value represents the maximum duration between the
                   time a connect is received for a process at the
                   executor node and the time that process accepts or
                   rejects it. If the connect is not accepted or rejected
                   by the user within the number of seconds specified,
                   Session Control rejects it for the user.  A 0
                   indicates no timer is running."
               ::= { session 2 }

           phivSessionOutTimer OBJECT-TYPE
               SYNTAX INTEGER (0..65535)
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This value represents the duration between the time the
                   executor requests a connect and the time that connect is
                   acknowledged by the destination node. If the connect is
                   not acknowledged within the number of seconds
                   specified, Session Control returns an error.  A 0
                   indicates no timer is running."
               ::= { session 3 }

           -- End Communication Layer Group

           -- The implementation of the End Communication Layer Group is
           -- mandatory for all systems that implement end layer
           -- communications.

           -- Remote State Table

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           phivEndRemoteTable OBJECT-TYPE
               SYNTAX SEQUENCE OF PhivEndRemoteEntry
               ACCESS not-accessible
               STATUS mandatory
               DESCRIPTION
                   "Information about the state of sessions between the
                   node under study and the nodes found in the table."
               ::= { end 1 }

           phivEndRemoteEntry OBJECT-TYPE
               SYNTAX PhivEndRemoteEntry
               ACCESS not-accessible
               STATUS mandatory
               DESCRIPTION
                   "Information about a particular remote node as seen
                   from the end communication layer."
               INDEX  { phivEndRemoteHostNodeID }
               ::= { phivEndRemoteTable 1 }

           PhivEndRemoteEntry ::=
               SEQUENCE {
                   phivEndRemoteHostNodeID
                       PhivAddr,
                   phivEndRemoteState
                       INTEGER,
                   phivEndCircuitIndex
                       INTEGER,
                   phivEndActiveLinks
                       INTEGER,
                   phivEndDelay
                       INTEGER (0..65535)
                }
            phivEndRemoteHostNodeID OBJECT-TYPE
               SYNTAX PhivAddr -- OCTET STRING (SIZE (2))
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This value is the address of the remote node to be
                   evaluated."
               ::= { phivEndRemoteEntry 1 }

           phivEndRemoteState OBJECT-TYPE
               SYNTAX INTEGER {
                   on (1),
                   off (2),
                   shut (3),
                   restricted (4)

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               }
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This represents the operational state of the remote node
                   being evaluated.
                   The possible states are:

                   ON          Allows logical links.
                   OFF         Allows no new links, terminates existing
                               links, and stops routing traffic through.
                   SHUT        Allows no new logical links, does not
                               destroy existing logical links, and goes
                               to the OFF state when all logical links are
                               gone.
                   RESTRICTED  Allows no new incoming logical links from
                               other nodes.

                   NOTE: These values are incremented by one compared to
                   the standard DECnet values in order to maintain
                   compliance with RFC 1155."
               ::= { phivEndRemoteEntry 2 }

           phivEndCircuitIndex OBJECT-TYPE
               SYNTAX INTEGER
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "A unique index value for each known circuit used to
                   communicate with the remote node.  This is the same
                   value as phivCircuitIndex."
               ::= { phivEndRemoteEntry 3 }

           phivEndActiveLinks OBJECT-TYPE
               SYNTAX INTEGER (0..65535)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This read-only parameter represents the number of active
                   logical links from the executor to the destination node."
               ::= { phivEndRemoteEntry 4 }

           phivEndDelay OBJECT-TYPE
               SYNTAX INTEGER (0..65535)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This read-only parameter is the average round trip

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                   delay in seconds to the destination node. This
                   parameter is kept on a remote node basis."
               ::= { phivEndRemoteEntry 5 }

           -- End System Counter Table

           phivEndCountTable OBJECT-TYPE
               SYNTAX SEQUENCE OF PhivEndCountEntry
               ACCESS not-accessible
               STATUS mandatory
               DESCRIPTION
                   "Information about the counters associated with each end
                   system that is known to the entity. These counters
                   reflect totals from the perspective of the executor
                   node."
               ::= { end 2 }

           phivEndCountEntry OBJECT-TYPE
               SYNTAX PhivEndCountEntry
               ACCESS not-accessible
               STATUS mandatory
               DESCRIPTION
                   "Information about a particular session between two end
                   systems."
               INDEX  { phivEndCountHostNodeID }
               ::= { phivEndCountTable 1 }

           PhivEndCountEntry ::=
               SEQUENCE {
                   phivEndCountHostNodeID
                       PhivAddr,
                   phivEndCountSecsLastZeroed
                       PhivCounter (0..65535),
                   phivEndCountUsrBytesRec
                       PhivCounter,
                   phivEndCountUsrBytesSent
                       PhivCounter,
                   phivEndUCountUsrMessRec
                       PhivCounter,
                   phivEndCountUsrMessSent
                       PhivCounter,
                   phivEndCountTotalBytesRec
                       PhivCounter,
                   phivEndCountTotalBytesSent
                       PhivCounter,
                   phivEndCountTotalMessRec
                       PhivCounter,
                   phivEndCountTotalMessSent

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                       PhivCounter,
                   phivEndCountConnectsRecd
                       PhivCounter (0..65535),
                   phivEndCountConnectsSent
                       PhivCounter (0..65535),
                   phivEndCountReponseTimeouts
                       PhivCounter (0..65535),
                   phivEndCountRecdConnectResErrs
                       PhivCounter (0..65535)
               }
           phivEndCountHostNodeID OBJECT-TYPE
               SYNTAX PhivAddr -- OCTET STRING (SIZE (2))
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This value is the address of the remote node to be
                   evaluated."
               ::= { phivEndCountEntry 1 }

           phivEndCountSecsLastZeroed OBJECT-TYPE
               SYNTAX PhivCounter (0..65535)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This value is the number of seconds that have elapsed
                   since the counters for the node in this table row were
                   last set to zero. This counter is located  in the
                   network management layer, but is returned with the
                   end system information which follows."
               ::= { phivEndCountEntry 2 }

           phivEndCountUsrBytesRec OBJECT-TYPE
               SYNTAX PhivCounter
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of user bytes received from the target host."
               ::= { phivEndCountEntry 3 }

           phivEndCountUsrBytesSent OBJECT-TYPE
               SYNTAX PhivCounter
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of user bytes sent to the target host."
               ::= { phivEndCountEntry 4 }

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           phivEndUCountUsrMessRec OBJECT-TYPE
                SYNTAX PhivCounter
                ACCESS read-only
                STATUS mandatory
                DESCRIPTION
                    "Number of user messages received from the target host."
                ::= { phivEndCountEntry 5 }

           phivEndCountUsrMessSent OBJECT-TYPE
               SYNTAX PhivCounter
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of user messages sent to the target host."
               ::= { phivEndCountEntry 6 }

           phivEndCountTotalBytesRec OBJECT-TYPE
               SYNTAX PhivCounter
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of bytes received from the target host."
               ::= { phivEndCountEntry 7 }

           phivEndCountTotalBytesSent OBJECT-TYPE
               SYNTAX PhivCounter
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of bytes sent to the target host."
               ::= { phivEndCountEntry 8 }

           phivEndCountTotalMessRec OBJECT-TYPE
               SYNTAX PhivCounter
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of messages received from the target host."
               ::= { phivEndCountEntry 9 }

           phivEndCountTotalMessSent OBJECT-TYPE
               SYNTAX PhivCounter
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of messages sent to the target host."
               ::= { phivEndCountEntry 10 }

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           phivEndCountConnectsRecd OBJECT-TYPE
               SYNTAX PhivCounter (0..65535)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of connects received from the target host."
               ::= { phivEndCountEntry 11 }

           phivEndCountConnectsSent OBJECT-TYPE
               SYNTAX PhivCounter (0..65535)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of connects sent to the target host."
               ::= {phivEndCountEntry 12 }

           phivEndCountReponseTimeouts OBJECT-TYPE
               SYNTAX PhivCounter (0..65535)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of response timeouts."
               ::= { phivEndCountEntry 13 }

           phivEndCountRecdConnectResErrs OBJECT-TYPE
               SYNTAX PhivCounter (0..65535)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of received connect resource errors."
               ::= {phivEndCountEntry 14 }

           -- additional End System objects

           phivEndMaxLinks OBJECT-TYPE
               SYNTAX INTEGER (1..65535)
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This value represents the maximum active logical
                   link count allowed for the executor."
               ::= { end 3 }

           phivEndNSPVers OBJECT-TYPE
               SYNTAX DisplayString (SIZE (0..255) )
               ACCESS read-only
               STATUS mandatory

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               DESCRIPTION
                   "This read-only parameter represents the version number
                   of the node End Communication S/W. The format is
                   version number, ECO, and user ECO, e.g., 4.1.0"
               ::= { end 4 }

           phivEndRetransmitFactor OBJECT-TYPE
               SYNTAX INTEGER (1..65535)
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This value represents the maximum number of times the
                   source End Communication at the executor node will
                   restart the retransmission timer when it expires. If
                   the number is exceeded, Session Control disconnects the
                   logical link for the user."
               ::= { end 5 }

           phivEndDelayFact OBJECT-TYPE
               SYNTAX INTEGER (1..255)
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This is the number by which to multiply one sixteenth
                   of the estimated round trip delay to a node to set the
                   retransmission timer to that node."
               ::= { end 6 }

           phivEndDelayWeight OBJECT-TYPE
               SYNTAX INTEGER (1..255)
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This number represents the weight to apply to a
                   current round trip delay estimate to a remote node
                   when updating the estimated round trip delay to a node.
                   On some systems the number must be 1 less than a power
                   of 2 for computational efficiency."
               ::= { end 7 }

           phivEndInactivityTimer OBJECT-TYPE
               SYNTAX INTEGER (1..65535)
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This value represents the maximum duration of inactivity
                   (no data in either direction) on a logical link before
                   the node checks to see if the logical link still works.

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                   If no activity occurs within the minimum number of
                   seconds, End Communication generates artificial
                   traffic to test the link (End Communication
                   specification)."
               ::= { end 8 }

           phivEndCountZeroCount OBJECT-TYPE
               SYNTAX INTEGER {
                 other (1),
                 reset (2)
               }
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "When this value is set to 2, all of the counters in
                   the End System Counter Table are set to zero."
               ::= { end 9 }

           phivEndMaxLinksActive OBJECT-TYPE
               SYNTAX PhivCounter (0..65535)
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This value represents the high water mark for the
                   number of links that were active at any one time."
               ::= { end 10 }

           -- Routing Layer Group

           -- The implementation of the Routing Layer Group is mandatory for
           -- all systems that implement level 1 routing layer
           -- communications.

           phivRouteBroadcastRouteTimer OBJECT-TYPE
               SYNTAX INTEGER (1..65535)
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This value determines the maximum time in seconds
                    allowed between Routing updates on Ethernet
                    circuits. When this timer expired before a routing
                    update occurs, a routing update is forced.  With a
                    standard calculation, Routing also uses this timer
                    to enforce a minimum delay between routing updates."
               ::= { routing 1 }

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

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               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This parameter value determines the maximum size of
                    a Routing message. It therefore determines the maximum
                    size message that can be forwarded.  This size includes
                    protocol overhead down to and including the End
                    Communication layer, plus a constant value of 6. (This
                    value of 6 is included to provide compatibility with
                    the parameter definition in Phase III, which included
                    the Routing overhead.) It does not include Routing or
                    Data link overhead (except for the constant value of
                    6). There is one buffer size for all circuits.

                    NOTE: The BUFFER SIZE defines the maximum size messages
                    that the Routing layer can forward. The SEGMENT BUFFER
                    SIZE (defined below) defines the maximum size messages
                    that the End Communication layer can transmit or
                    receive. The SEGMENT BUFFER SIZE is always less than
                    or equal to the BUFFER SIZE. Normally the two
                    parameters will be equal. They may be different to
                    allow the network manager to alter buffer sizes
                    on all nodes without interruption of service. They both
                    include an extra 6 bytes for compatibility with Phase
                    III."
               ::= { routing 2 }

           phivRouteRoutingVers OBJECT-TYPE
               SYNTAX DisplayString ( SIZE (0..255) )
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This read-only parameter identifies the executor node's
                   Routing version number.  The format is version number,
                   ECO, and user ECO, e.g., 4.1.0"
               ::= { routing 3 }

           phivRouteMaxAddr OBJECT-TYPE
               SYNTAX INTEGER (1..1023)
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This value represents the largest node number and,
                   therefore, number of nodes that can be known about
                   by the executor node's home area."
               ::= { routing 4 }

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           phivRouteMaxBdcastNonRouters OBJECT-TYPE
               SYNTAX INTEGER (0..65535)
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This value represents the maximum total number of
                   nonrouters the executor node can have on its Ethernet
                   circuits."
               ::= { routing 5 }

           phivRouteMaxBdcastRouters OBJECT-TYPE
               SYNTAX INTEGER (0..65535)
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This value represents the maximum total number of
                   routers the executor node can have on its Ethernet
                   circuits."
               ::= { routing 6 }

           phivRouteMaxBuffs OBJECT-TYPE
               SYNTAX INTEGER (1..65535)
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This value represents the maximum number of transmit
                   buffers that Routing may use for all circuits."
               ::= { routing 7 }

           phivRouteMaxCircuits OBJECT-TYPE
               SYNTAX INTEGER (1..65535)
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This value represents the maximum number of Routing
                   circuits that the executor node can know about."
               ::= { routing 8 }

           phivRouteMaxCost OBJECT-TYPE
               SYNTAX INTEGER (1..1022)
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This value represents the maximum total path cost
                   allowed from the executor to any node within an area.
                   The path cost is the sum of the circuit costs along
                   a path between two nodes. This parameter defines the
                   point where the executor node's Routing routing

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    RFC 1289                  DECnet Phase IV MIB              December 1991

                   decision algorithm declares another node unreachable
                   because the cost of the least costly path to the
                   other node is excessive. For correct operation, this
                   parameter must not be less than the maximum path cost
                   of the network."
               ::= { routing 9 }

           phivRouteMaxHops OBJECT-TYPE
               SYNTAX INTEGER (1..30)
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This value represents the maximum number of routing hops
                   allowable from the executor to any other reachable node
                   within an area. (A hop is the logical distance over a
                   circuit between two adjacent nodes.) This parameter
                   defines the point where the executor node's Routing
                   routing decision algorithm declares another node
                   unreachable because the length of the shortest path
                   between the two nodes is too long. For correct
                   operation, this parameter must not be less than the
                   network diameter. (The network diameter is the
                   reachability distance between the two nodes of the
                   network having the greatest reachability distance,
                   where reachability distance is the length the shortest
                   path between a given pair of nodes.)"
               ::= { routing 10 }

           phivRouteMaxVisits OBJECT-TYPE
               SYNTAX INTEGER (1..63)
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This value represents the maximum number of nodes a
                   message coming into the executor node can have visited.
                   If the message is not for this node and the MAXIMUM
                   VISITS number is exceeded, the message is discarded.
                   The MAXIMUM VISITS parameter defines the point where
                   the packet lifetime control algorithm discards
                   a packet that has traversed too many nodes. For correct
                   operation, this parameter must not be less than the
                   maximum path length of the network. (The maximum path
                   length is the routing distance between the two nodes of
                   the network having the greatest routing distance, where
                   routing distance is the length of the least costly
                   path between a given pair of nodes.)"
               ::= { routing 11 }

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    RFC 1289                  DECnet Phase IV MIB              December 1991

           phivRouteRoutingTimer OBJECT-TYPE
               SYNTAX INTEGER (1..65535)
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This value determines the maximum time in seconds
                   allowed between Routing updates on non-Ethernet
                   circuits. When this timer expires before a routing
                   update occurs, a routing update is forced."
               ::= { routing 12 }

           phivRouteSegBuffSize OBJECT-TYPE
               SYNTAX INTEGER
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This parameter value determines the maximum size of an
                   end-to-end segment. The size is a decimal integer in
                   the range 1-65535. This size is in bytes. This size
                   includes protocol overhead down to and including the
                   End Communication layer, plus a constant value of 6.
                   (This value of 6 is included to provide compatibility
                   with the BUFFER SIZE parameter definition.) It does not
                   include Routing or Data link overhead (except for the
                   constant value of 6)."
               ::= { routing 13 }

           phivRouteType OBJECT-TYPE
               SYNTAXINTEGER {
                   routing-III (1),
                   nonrouting-III (2),
                   area (3),
                   routing-IV (4),
                   nonrouting-IV (5)
               }
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This parameter indicates the type of the executor
                   node. The node-type is one of the following:

                   routing-III
                   nonrouting-III
                   routing-IV
                   ronrouting-IV
                   area

                   A routing node has full routing capability. A

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    RFC 1289                  DECnet Phase IV MIB              December 1991

                   nonrouting node contains a subset of the Routing
                   routing modules. The III and IV indicate the DNA
                   phase of the node. Nonrouting nodes can deliver
                   and receive packets to and from any node, but cannot
                   route packets from other nodes through to other nodes.
                   An area node routes between areas. Refer to the Routing
                   specification for details.

                   For adjacent nodes, this is a read-only parameter that
                   indicates the type of the reachable adjacent node.
                   NOTE: The ROUTING-III and NONROUTING-III values are
                   incremented by one compared to the standard DECnet
                   values in order to maintain compliance with RFC 1155)"
               ::= { routing 14 }

           phivRouteCountAgedPktLoss OBJECT-TYPE
               SYNTAX PhivCounter (0..127)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of aged packet losses."
               ::= { routing 15 }

           phivRouteCountNodeUnrPktLoss OBJECT-TYPE
               SYNTAX PhivCounter (0..65535)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of node unreachable packet losses."
               ::= { routing 16 }

           phivRouteCountOutRngePktLoss OBJECT-TYPE
               SYNTAX PhivCounter (0..127)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of node out-of-range packet losses."
               ::= { routing 17 }

           phivRouteCountOverSzePktLoss OBJECT-TYPE
               SYNTAX PhivCounter (0..127)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of Oversized packet losses."
               ::= { routing 18 }

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    RFC 1289                  DECnet Phase IV MIB              December 1991

           phivRouteCountPacketFmtErr OBJECT-TYPE
               SYNTAX PhivCounter (0..127)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of packet format errors."
               ::= { routing 19 }

           phivRouteCountPtlRteUpdtLoss OBJECT-TYPE
               SYNTAX PhivCounter (0..127)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of partial routing update losses."
               ::= { routing 20 }

           phivRouteCountVerifReject OBJECT-TYPE
               SYNTAX PhivCounter (0..127)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of verification rejects."
               ::= { routing 21 }

            -- Level 1 Routing Table

           phivLevel1RouteTable OBJECT-TYPE
               SYNTAX SEQUENCE OF PhivLevel1RouteEntry
               ACCESS not-accessible
               STATUS mandatory
               DESCRIPTION
                   "Information about the currently known DECnet Phase
                   IV Routes."
               ::= { routing 22 }

           phivLevel1RouteEntry OBJECT-TYPE
               SYNTAX PhivLevel1RouteEntry
               ACCESS not-accessible
               STATUS mandatory
               DESCRIPTION
                   "Information about the currently known DECnet Phase
                   IV Routes."
               INDEX  { phivLevel1RouteNodeAddr }
               ::= { phivLevel1RouteTable 1 }

           PhivLevel1RouteEntry ::=
               SEQUENCE {
                   phivLevel1RouteNodeAddr

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    RFC 1289                  DECnet Phase IV MIB              December 1991

                       PhivAddr,
                   phivLevel1RouteCircuitIndex
                       INTEGER,
                   phivLevel1RouteCost
                       INTEGER (0..65535),
                   phivLevel1RouteHops
                       INTEGER (0..127),
                   phivLevel1RouteNextNode
                       PhivAddr
                    }
            phivLevel1RouteNodeAddr OBJECT-TYPE
               SYNTAX PhivAddr -- OCTET STRING (SIZE (2))
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This value is the address of the node about which
                   routing information is contained in this level 1
                   routing table."
               ::= { phivLevel1RouteEntry 1 }

           phivLevel1RouteCircuitIndex OBJECT-TYPE
               SYNTAX INTEGER
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "A unique index value for each known circuit. This is
                   the index to the circuit state table and is the same
                   value as phivCircuitIndex."
               ::= { phivLevel1RouteEntry 2 }

           phivLevel1RouteCost OBJECT-TYPE
               SYNTAX INTEGER (0..65535)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This read-only parameter represents the total cost
                   over the current path to the destination node. Cost is
                   a positive integer value associated with using a
                   circuit. Routing routes messages (data) along the path
                   between two nodes with the smallest cost. COST is kept
                   on a remote node basis."
               ::= { phivLevel1RouteEntry 3 }

           phivLevel1RouteHops OBJECT-TYPE
               SYNTAX INTEGER (0..127)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION

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    RFC 1289                  DECnet Phase IV MIB              December 1991

                   "This read-only parameter represents the number of hops
                   over to a destination node. A hop is Routing value
                   representing the logical distance between two nodes in
                   a network. HOPS is kept on a remote node basis."
               ::= { phivLevel1RouteEntry 4 }

           phivLevel1RouteNextNode OBJECT-TYPE
               SYNTAX PhivAddr -- OCTET STRING (SIZE (2))
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This read-only value indicates the next node on the
                   circuit used to get to the node under scrutiny
                   (next hop)."
               ::= { phivLevel1RouteEntry 5 }

           -- Additional routing parameters

           phivRouteCountZeroCount OBJECT-TYPE
               SYNTAX INTEGER {
                 other (1),
                 reset (2)
               }
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "When this value is set to 2, the following objects are
                   set to Zero: phivRouteCountAgedPktLoss,
                   phivRouteCountNodeUnrPktLoss,
                   phivRouteCountOutRngePktLoss,
                   phivRouteCountOverSzePktLoss,
                   phivRouteCountPacketFmtErr,
                   phivRouteCountPtlRteUpdtLoss, and
                   phivRouteCountVerifReject."
               ::= { routing 23 }

           phivRouteSystemAddr OBJECT-TYPE
               SYNTAX PhivAddr
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "DECnet Phase IV node address."
               ::= { routing 24 }

    DECnet Phase IV MIB Working Group                              [Page 23]

    RFC 1289                  DECnet Phase IV MIB              December 1991

           -- Circuit Group

           -- The implementation of the Circuit Group is mandatory for
           -- all systems.

           -- Circuit Parameters Table

           phivCircuitParametersTable OBJECT-TYPE
               SYNTAX SEQUENCE OF PhivCircuitParametersEntry
               ACCESS not-accessible
               STATUS mandatory
               DESCRIPTION
                   "Information about the parameters associated with all
                   circuits currently known."
               ::= {circuit 1 }

           phivCircuitParametersEntry OBJECT-TYPE
               SYNTAX PhivCircuitParametersEntry
               ACCESS not-accessible
               STATUS mandatory
               DESCRIPTION
                   "Parameters information about all circuits currently
                   known."
                INDEX  { phivCircuitIndex }
                ::= { phivCircuitParametersTable 1 }

           PhivCircuitParametersEntry ::=
               SEQUENCE {
                   phivCircuitIndex
                       INTEGER,
                   phivCircuitLineIndex
                       INTEGER,
                   phivCircuitCommonState
                       INTEGER,
                   phivCircuitCommonSubState
                       INTEGER,
                   phivCircuitCommonName
                       DisplayString,
                   phivCircuitExecRecallTimer
                       INTEGER (0..65535),
                   phivCircuitCommonType
                       INTEGER,
                   phivCircuitService
                       INTEGER,
                   phivCircuitExecCost
                       INTEGER (1..25),
                   phivCircuitExecHelloTimer

    DECnet Phase IV MIB Working Group                              [Page 24]

    RFC 1289                  DECnet Phase IV MIB              December 1991

                       INTEGER (1..8191)
               }
            phivCircuitIndex OBJECT-TYPE
               SYNTAX INTEGER
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "A unique index value for each known circuit."
               ::= { phivCircuitParametersEntry 1 }

           phivCircuitLineIndex OBJECT-TYPE
               SYNTAX INTEGER
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "The line on which this circuit is active.  This is
                   the same as the IfIndex."
               ::= { phivCircuitParametersEntry 2 }

           phivCircuitCommonState OBJECT-TYPE
               SYNTAX INTEGER {
                   on (1),
                   off (2),
                   service (3),
                   cleared (4)
               }
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This value represents the circuit's Network Management
                   operational state. NOTE: These values are incremented
                   by one compared to the standard DECnet values in order
                   to maintain compliance with RFC 1155."
               ::= { phivCircuitParametersEntry 3 }

           phivCircuitCommonSubState OBJECT-TYPE
               SYNTAX INTEGER {
                   starting (1),
                   reflecting (2),
                   looping (3),
                   loading (4),
                   dumping (5),
                   triggering (6),
                   autoservice (7),
                   autoloading (8),
                   autodumping (9),
                   autotriggering (10),
                   synchronizing (11),

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    RFC 1289                  DECnet Phase IV MIB              December 1991

                   failed (12),
                   running (13)
               }
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This value represents the circuit's Network Management
                   operational and service substate. NOTE: These values are
                   incremented by one compared to the standard DECnet values
                   in order to maintain compliance with RFC 1155."
               ::= { phivCircuitParametersEntry 4 }

           phivCircuitCommonName OBJECT-TYPE
               SYNTAX DisplayString ( SIZE (0..16) )
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "The name of the circuit entry in the table, for example,
                   SVA-0 or in a level 2 router ASYNC-8 or ETHER-1)."
               ::= { phivCircuitParametersEntry 5 }

           phivCircuitExecRecallTimer OBJECT-TYPE
               SYNTAX INTEGER (0..65535)
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This parameter represents the minimum number of
                   seconds to wait before restarting the circuit.  A
                   value of 0 indicates not timer is running."
               ::= { phivCircuitParametersEntry 6 }

           phivCircuitCommonType OBJECT-TYPE
               SYNTAX INTEGER {
                   ddcmp-point (1),
                   ddcmp-control (2),
                   ddcmp-tributary (3),
                   x25 (4),
                   ddcmp-dmc (5),
                   ethernet (6),
                   ci (7),
                   qp2-dte20 (8),
                   bisync (9),
                   other (14),
                   fddi (15)
               }
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION

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    RFC 1289                  DECnet Phase IV MIB              December 1991

                   "Represents the type of the circuit. For X.25 circuits,
                   the value must be set to X25. For DDCMP and Ethernet
                   circuits it is read only and is the same value as the
                   protocol of the associated line.
                   NOTE: Values 1 - 5 are incremented by one compared to the
                   standard DECnet values in order to maintain compliance
                   with RFC 1155."
               ::= { phivCircuitParametersEntry 7 }

           phivCircuitService  OBJECT-TYPE
               SYNTAX INTEGER {
                   enabled (1),
                   disabled (2)
               }
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This value indicates whether or not Network Management
                   allows service operations on a circuit. The values for
                   service-control are as follows:

                   ENABLED     SERVICE state and/or service functions are
                               allowed.

                   DISABLED    SERVICE state and/or service functions are not
                               allowed.

                   NOTE: These values are incremented by one compared to the
                   standard DECnet values in order to maintain compliance
                   with RFC 1155."
               ::= { phivCircuitParametersEntry 8 }

           phivCircuitExecCost OBJECT-TYPE
               SYNTAX INTEGER (1..25)
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This value represents the routing cost of the circuit.
                   Routing sends messages along the path between two nodes
                   having the smallest cost."
               ::= { phivCircuitParametersEntry 9 }

           phivCircuitExecHelloTimer OBJECT-TYPE
               SYNTAX INTEGER (1..8191)
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This value determines the frequency of Routing Hello

    DECnet Phase IV MIB Working Group                              [Page 27]

    RFC 1289                  DECnet Phase IV MIB              December 1991

                   messages sent to the adjacent node on the circuit."
               ::= { phivCircuitParametersEntry 10 }

           -- Circuit Counters Table

           phivCircuitCountTable OBJECT-TYPE
               SYNTAX SEQUENCE OF PhivCircuitCountEntry
               ACCESS not-accessible
               STATUS mandatory
               DESCRIPTION
                   "Information about the counters associated with all
                   circuits currently known."
               ::= { circuit 2 }

           phivCircuitCountEntry OBJECT-TYPE
               SYNTAX PhivCircuitCountEntry
               ACCESS not-accessible
               STATUS mandatory
               DESCRIPTION
                   "Counter information about all circuits currently known"
               INDEX     { phivCircuitIndex }
               ::= { phivCircuitCountTable 1 }

           PhivCircuitCountEntry ::=
               SEQUENCE {
                   phivCircuitCountSecLastZeroed
                       PhivCounter (0..65535),
                   phivCircuitCountTermPacketsRecd
                       PhivCounter,
                   phivCircuitCountOriginPackSent
                       PhivCounter,
                   phivCircuitCountTermCongLoss
                       PhivCounter (0..65535),
                   phivCircuitCountCorruptLoss
                       PhivCounter (0..255),
                   phivCircuitCountTransitPksRecd
                       PhivCounter,
                   phivCircuitCountTransitPkSent
                       PhivCounter,
                   phivCircuitCountTransitCongestLoss
                       PhivCounter (0..65535),
                   phivCircuitCountCircuitDown
                       PhivCounter (0..255),
                   phivCircuitCountInitFailure
                       PhivCounter (0..255),
                   phivCircuitCountAdjDown
                       PhivCounter,

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    RFC 1289                  DECnet Phase IV MIB              December 1991

                   phivCircuitCountPeakAdj
                       PhivCounter,
                   phivCircuitCountBytesRecd
                       PhivCounter,
                   phivCircuitCountBytesSent
                       PhivCounter,
                   phivCircuitCountDataBlocksRecd
                       PhivCounter (0..65535),
                   phivCircuitCountDataBlocksSent
                       PhivCounter,
                   phivCircuitCountUsrBuffUnav
                       PhivCounter (0..65535)
               }
           phivCircuitCountSecLastZeroed  OBJECT-TYPE
               SYNTAX PhivCounter (0..65535)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of seconds since the circuit counters for this
                   circuit were last zeroed."
               ::= { phivCircuitCountEntry 1 }

           phivCircuitCountTermPacketsRecd OBJECT-TYPE
               SYNTAX PhivCounter
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of terminating packets received on this circuit."
               ::= { phivCircuitCountEntry 2 }

           phivCircuitCountOriginPackSent OBJECT-TYPE
               SYNTAX PhivCounter
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of originating packets sent on this circuit."
               ::= { phivCircuitCountEntry 3 }

           phivCircuitCountTermCongLoss OBJECT-TYPE
               SYNTAX PhivCounter
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of terminating congestion losses on this
                   circuit."
               ::= { phivCircuitCountEntry 4 }

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    RFC 1289                  DECnet Phase IV MIB              December 1991

           phivCircuitCountCorruptLoss OBJECT-TYPE
               SYNTAX PhivCounter (0..255)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of corruption losses on this circuit."
               ::= { phivCircuitCountEntry 5 }

           phivCircuitCountTransitPksRecd OBJECT-TYPE
               SYNTAX PhivCounter
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of Transit packets received on this circuit."
               ::= { phivCircuitCountEntry 6 }

           phivCircuitCountTransitPkSent OBJECT-TYPE
               SYNTAX PhivCounter
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of transit packets sent on this circuit."
               ::= { phivCircuitCountEntry 7 }

           phivCircuitCountTransitCongestLoss OBJECT-TYPE
               SYNTAX PhivCounter (0..65535)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of transit congestion losses on this circuit."
               ::= { phivCircuitCountEntry 8 }

           phivCircuitCountCircuitDown OBJECT-TYPE
               SYNTAX PhivCounter (0..255)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of circuit downs on this circuit."
               ::= { phivCircuitCountEntry 9 }

           phivCircuitCountInitFailure OBJECT-TYPE
               SYNTAX PhivCounter (0..255)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of Initialization failures on this circuit."
               ::= { phivCircuitCountEntry 10 }

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    RFC 1289                  DECnet Phase IV MIB              December 1991

           phivCircuitCountAdjDown OBJECT-TYPE
               SYNTAX PhivCounter
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This counter indicates the number of adjacency losses
                   that result from any of the following:
                        Node listener timeout
                        Invalid data received at node listener
                        Unexpected control (initialization or verification)
                            message received
                        Routing message received with a checksum error
                        Node identification from a routing message or a
                        Hello message that is not the one expected Hello
                        message received indicating that connectivity
                        became one-way
                        Adjacency idled."
               ::= { phivCircuitCountEntry 11 }

           phivCircuitCountPeakAdj OBJECT-TYPE
               SYNTAX PhivCounter
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This counter indicates the maximum number of nodes
                   that are up on the circuit."
               ::= { phivCircuitCountEntry 12 }

           phivCircuitCountBytesRecd OBJECT-TYPE
               SYNTAX PhivCounter
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of bytes received on this circuit."
               ::= { phivCircuitCountEntry 13 }

           phivCircuitCountBytesSent OBJECT-TYPE
               SYNTAX PhivCounter
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of bytes sent on this circuit."
               ::= { phivCircuitCountEntry 14 }

           phivCircuitCountDataBlocksRecd OBJECT-TYPE
               SYNTAX PhivCounter
               ACCESS read-only
               STATUS mandatory

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    RFC 1289                  DECnet Phase IV MIB              December 1991

               DESCRIPTION
                   "Number of data blocks received on this circuit."
               ::= { phivCircuitCountEntry 15 }

           phivCircuitCountDataBlocksSent OBJECT-TYPE
               SYNTAX PhivCounter
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of data blocks sent on this circuit."
               ::= { phivCircuitCountEntry 16 }

           phivCircuitCountUsrBuffUnav OBJECT-TYPE
               SYNTAX PhivCounter (0..65535)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of user buffer unavailable errors."
               ::= { phivCircuitCountEntry 17 }

           -- Additional Circuit Parameters

           phivCircuitOrigQueueLimit OBJECT-TYPE
               SYNTAX INTEGER
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This parameter indicates the maximum number of
                   originating packets that may be outstanding on this
                   circuit. This does not include route-thru traffic."
               ::= { circuit 3 }

           phivCircuitCountZeroCount OBJECT-TYPE
               SYNTAX INTEGER {
                 other (1),
                 reset (2)
               }
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "When this value is set to 2, all of the counters in the
                   Circuit Counter Table are set to zero."
               ::= { circuit 4 }

           -- DDCMP Circuit Group

           -- The implementation of the DDCMP Circuit Group is mandatory for
           -- all systems which support DDCMP circuits.

    DECnet Phase IV MIB Working Group                              [Page 32]

    RFC 1289                  DECnet Phase IV MIB              December 1991

           -- DDCMP Parameters Table

           phivDDCMPCircuitParametersTable OBJECT-TYPE
               SYNTAX SEQUENCE OF PhivDDCMPCircuitParametersEntry
               ACCESS not-accessible
               STATUS mandatory
               DESCRIPTION
                   "Information about DDCMP circuit parameters."
               ::= { ddcmp 1}

           phivDDCMPCircuitParametersEntry OBJECT-TYPE
               SYNTAX PhivDDCMPCircuitParametersEntry
               ACCESS not-accessible
               STATUS mandatory
               DESCRIPTION
                   "Parameters information about DDCMP circuits currently
                    known."
               INDEX     { phivDDCMPCircuitIndex }
               ::= { phivDDCMPCircuitParametersTable 1 }

           PhivDDCMPCircuitParametersEntry ::=
               SEQUENCE {
                   phivDDCMPCircuitIndex
                       INTEGER,
                   phivDDCMPCircuitAdjNodeAddr
                       INTEGER (0..65535),
                   phivDDCMPCircuitTributary
                       INTEGER (0..255)
               }
           phivDDCMPCircuitIndex OBJECT-TYPE
               SYNTAX INTEGER
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "A unique index value for each known DDCMP circuit.
                   This is the same value as phivCircuitIndex."
               ::= { phivDDCMPCircuitParametersEntry 1 }

           phivDDCMPCircuitAdjNodeAddr OBJECT-TYPE
               SYNTAX PhivAddr -- OCTET STRING (SIZE (2))
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "The address of the adjacent node."
               ::= { phivDDCMPCircuitParametersEntry 2 }

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    RFC 1289                  DECnet Phase IV MIB              December 1991

           phivDDCMPCircuitTributary OBJECT-TYPE
               SYNTAX INTEGER (0..255)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This value represents the Data Link physical tributary
                   address of the circuit."
               ::= { phivDDCMPCircuitParametersEntry 3 }

           -- DDCMP Circuit Counter Table

           phivDDCMPCircuitCountTable OBJECT-TYPE
               SYNTAX SEQUENCE OF PhivDDCMPCircuitCountEntry
               ACCESS not-accessible
               STATUS mandatory
               DESCRIPTION
                   "Information about the DDCMP counters associated with all
                   circuits currently known."
               ::= { ddcmp 2 }

           phivDDCMPCircuitCountEntry OBJECT-TYPE
               SYNTAX PhivDDCMPCircuitCountEntry
               ACCESS not-accessible
               STATUS mandatory
               DESCRIPTION
                   "Counter information about DDCMP circuits now known"
               INDEX     { phivCircuitIndex }
               ::= { phivDDCMPCircuitCountTable 1 }

           PhivDDCMPCircuitCountEntry ::=
               SEQUENCE {
                   phivDDCMPCircuitErrorsInbd
                       PhivCounter (0..255),
                   phivDDCMPCircuitErrorsOutbd
                       PhivCounter (0..255),
                   phivDDCMPCircuitRmteReplyTimeouts
                       PhivCounter (0..255),
                   phivDDCMPCircuitLocalReplyTimeouts
                       PhivCounter (0..255),
                   phivDDCMPCircuitRmteBuffErrors
                       PhivCounter (0..255),
                   phivDDCMPCircuitLocalBuffErrors
                       PhivCounter (0..255),
                   phivDDCMPCircuitSelectIntervalsElap
                       PhivCounter (0..65535),
                   phivDDCMPCircuitSelectTimeouts
                       PhivCounter (0..255)
               }

    DECnet Phase IV MIB Working Group                              [Page 34]

    RFC 1289                  DECnet Phase IV MIB              December 1991

           phivDDCMPCircuitErrorsInbd OBJECT-TYPE
               SYNTAX PhivCounter (0..255)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of Data errors inbound."
               ::= { phivDDCMPCircuitCountEntry 1 }

           phivDDCMPCircuitErrorsOutbd OBJECT-TYPE
               SYNTAX PhivCounter (0..255)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of outbound data errors."
               ::= { phivDDCMPCircuitCountEntry 2 }

           phivDDCMPCircuitRmteReplyTimeouts OBJECT-TYPE
               SYNTAX PhivCounter (0..255)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of remote reply timeouts."
               ::= { phivDDCMPCircuitCountEntry 3 }

           phivDDCMPCircuitLocalReplyTimeouts OBJECT-TYPE
               SYNTAX PhivCounter (0..255)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of local Reply timeouts."
               ::= { phivDDCMPCircuitCountEntry 4 }

           phivDDCMPCircuitRmteBuffErrors OBJECT-TYPE
               SYNTAX PhivCounter (0..255)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of remote reply time out errors."
               ::= { phivDDCMPCircuitCountEntry 5 }

           phivDDCMPCircuitLocalBuffErrors  OBJECT-TYPE
               SYNTAX PhivCounter (0..255)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of local buffer errors."
               ::= { phivDDCMPCircuitCountEntry 6 }

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    RFC 1289                  DECnet Phase IV MIB              December 1991

           phivDDCMPCircuitSelectIntervalsElap OBJECT-TYPE
               SYNTAX PhivCounter (0..65535)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Selection intervals that have elapsed."
               ::= {phivDDCMPCircuitCountEntry 7 }

           phivDDCMPCircuitSelectTimeouts OBJECT-TYPE
               SYNTAX INTEGER (0..255)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of selection timeouts."
               ::= {phivDDCMPCircuitCountEntry 8 }

           -- DDCMP Line Count Table

           phivDDCMPLineCountTable OBJECT-TYPE
               SYNTAX SEQUENCE OF PhivDDCMPLineCountEntry
               ACCESS not-accessible
               STATUS mandatory
               DESCRIPTION
                   "The DDCMP Line Count Table."
               ::= { ddcmp 3 }

           phivDDCMPLineCountEntry OBJECT-TYPE
               SYNTAX PhivDDCMPLineCountEntry
               ACCESS not-accessible
               STATUS mandatory
               DESCRIPTION
                   "There is one entry in the table for each line."
               INDEX  { phivDDCMPLineCountIndex }
               ::= { phivDDCMPLineCountTable 1 }

           PhivDDCMPLineCountEntry ::=
               SEQUENCE {
                   phivDDCMPLineCountIndex
                       INTEGER,
                   phivDDCMPLineCountDataErrsIn
                       PhivCounter (0..255),
                   phivDDCMPLineCountRmteStationErrs
                       PhivCounter (0..255),
                   phivDDCMPLineCountLocalStationErrs
                       PhivCounter (0..255)
               }

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    RFC 1289                  DECnet Phase IV MIB              December 1991

           phivDDCMPLineCountIndex OBJECT-TYPE
               SYNTAX INTEGER
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "The line on which this entry's equivalence is
                   effective. The interface identified by a particular
                   value of this index is the same interface as
                   identified by the same value of phivLineIndex.
                   This value is the IfIndex."
               ::= { phivDDCMPLineCountEntry 1 }

           phivDDCMPLineCountDataErrsIn OBJECT-TYPE
               SYNTAX PhivCounter ( 0..255 )
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of data errors inbound."
               ::= { phivDDCMPLineCountEntry 2 }

           phivDDCMPLineCountRmteStationErrs OBJECT-TYPE
               SYNTAX PhivCounter ( 0..255 )
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of remote station errors."
               ::= { phivDDCMPLineCountEntry 3 }

           phivDDCMPLineCountLocalStationErrs OBJECT-TYPE
               SYNTAX PhivCounter ( 0..255 )
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                    "Number of local station errors."
               ::= { phivDDCMPLineCountEntry 4 }

           -- DDCMP Multipoint Circuit Control Group

           -- The implementation of the DDCMP Multipoint Circuit Control
           -- Group is mandatory for all systems which support DDCMP
           -- multipoint control circuits.

           phivControlSchedTimer OBJECT-TYPE
               SYNTAX INTEGER (50..65535)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This value represents the number of milliseconds

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    RFC 1289                  DECnet Phase IV MIB              December 1991

                   between recalculation of tributary polling priorities."
               DEFVAL { 200 }
               ::= { control 1 }

           phivControlDeadTimer OBJECT-TYPE
               SYNTAX INTEGER (1..65535)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This value represents the number of milliseconds
                   between polls of one of the set of dead
                   tributaries."
               DEFVAL { 10000 }
               ::= { control 2 }

           phivControlDelayTimer OBJECT-TYPE
               SYNTAX INTEGER (1..65535)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This value represents the minimum number of
                   milliseconds to delay between polls. The delay timer
                   limits the effect of a very fast control station on
                   slow tributaries."
               ::= { control 3 }

           phivControlStreamTimer OBJECT-TYPE
               SYNTAX INTEGER (0..65535)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This value represents the number of milliseconds a
                   tributary or a half duplex remote station is
                   allowed to hold the line.

                   NOTE: This parameter can also be applied to
                   half-duplex lines of type DDCMP POINT."
               DEFVAL { 6000 }
               ::= { control 4 }

           -- DDCMP Multipoint Circuit Control Parameters Table

           phivControlParametersTable OBJECT-TYPE
               SYNTAX SEQUENCE OF PhivControlParametersEntry
               ACCESS not-accessible
               STATUS mandatory
               DESCRIPTION
                   "Information about control circuit parameters."

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    RFC 1289                  DECnet Phase IV MIB              December 1991

               ::= { control 5 }

           phivControlParametersEntry OBJECT-TYPE
               SYNTAX PhivControlParametersEntry
               ACCESS not-accessible
               STATUS mandatory
               DESCRIPTION
                   "Parameters information about control circuits
                   currently known."
               INDEX  { phivControlCircuitIndex }
               ::= { phivControlParametersTable 1 }

           PhivControlParametersEntry ::=
               SEQUENCE {
                   phivControlCircuitIndex
                       INTEGER,
                   phivControlBabbleTimer
                       INTEGER (1..65535),
                   phivControlMaxBuffs
                       INTEGER (0..254),
                   phivControlMaxTransmits
                       INTEGER (1..255),
                   phivControlDyingBase
                       INTEGER (0..255),
                   phivControlDyingIncrement
                       INTEGER (0..255),
                   phivControlDeadThreshold
                       INTEGER (0..255),
                   phivControlDyingThreshold
                       INTEGER (0..255),
                   phivControlInactTreshold
                       INTEGER (0..255),
                   phivControlPollingState
                       INTEGER,
                   phivControlPollingSubState
                       INTEGER,
                   phivControlTransTimer
                       INTEGER (0..65535)
               }
           phivControlCircuitIndex OBJECT-TYPE
               SYNTAX INTEGER
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "A unique index value for each known multirpoint
                   control circuit.
                    This is the same value as phivCircuitIndex."
               ::= { phivControlParametersEntry 1 }

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    RFC 1289                  DECnet Phase IV MIB              December 1991

           phivControlBabbleTimer OBJECT-TYPE
               SYNTAX INTEGER (1..65535)
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This value represents the number of milliseconds that a
                   selected tributary or remote half-duplex station is
                   allowed to transmit."
               DEFVAL { 6000 }
               ::= { phivControlParametersEntry 2 }

           phivControlMaxBuffs  OBJECT-TYPE
               SYNTAX INTEGER (0..254)
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This value represents the maximum number of buffers the
                   tributary can use from a common buffer pool. If not
                   set, there is no common buffer pool and buffers are
                   explicitly supplied by the higher level. Count is a
                   decimal integer in the range 1-254."
               ::= { phivControlParametersEntry 3 }

           phivControlMaxTransmits  OBJECT-TYPE
               SYNTAX INTEGER (1..255)
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This value represents the maximum number of data
                   messages that can be transmitted at one time. Count
                   is a decimal integer in the range 1-255."
               DEFVAL { 4 }
               ::= { phivControlParametersEntry 4 }

           phivControlDyingBase OBJECT-TYPE
               SYNTAX INTEGER (0..255)
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This value represents the base priority to which a
                   tributary is reset each time it has been polled. A
                   separate base can be set for each of the indicated
                   polling states. Base is a decimal integer in the range
                   0-255.  If not set, the defaults are: active, 255;
                   inactive, 0; and dying, 0."
               ::= { phivControlParametersEntry 5 }

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    RFC 1289                  DECnet Phase IV MIB              December 1991

           phivControlDyingIncrement OBJECT-TYPE
               SYNTAX INTEGER (0..255)
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This value represents the increment added to the
                   tributary priority each time the scheduling timer
                   expires.  If not set, the defaults are: active, 0;
                   inactive, 64; and dying, 16."
               ::= { phivControlParametersEntry 6 }

           phivControlDeadThreshold OBJECT-TYPE
               SYNTAX INTEGER (0..255)
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This value represents the number of times to poll the
                   active, inactive, or dying tributary before changing
                   its polling state to dead because of receive timeouts.
                   Count is a decimal integer in the range 0-255."
               DEFVAL { 8 }
               ::= { phivControlParametersEntry 7 }

           phivControlDyingThreshold OBJECT-TYPE
               SYNTAX INTEGER (0..255)
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This value represents the number of times to poll the
                   active or inactive tributary before changing its
                   polling state to dying because of receive timeouts.
                   Count is a decimal integer in the range 0-255."
               DEFVAL { 2 }
               ::= { phivControlParametersEntry 8 }

           phivControlInactTreshold OBJECT-TYPE
               SYNTAX INTEGER (0..255)
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This value represents the number of times to poll the
                   active tributary before changing its polling state to
                   inactive because of no data response. Count is a
                   decimal integer in the range
                   0-255."
               DEFVAL { 8 }
               ::= { phivControlParametersEntry 9 }

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    RFC 1289                  DECnet Phase IV MIB              December 1991

           phivControlPollingState OBJECT-TYPE
               SYNTAX INTEGER {
                   automatic (1),
                   active (2),
                   inactive (3),
                   dying (4),
                   dead (5)
               }
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This value represents the state of the tributary
                   relative to the multipoint polling algorithm.  If not
                   set the default is AUTOMATIC. The possible states are:

                   AUTOMATIC

                     The tributary's state is allowed to vary according to
                     the operation of the polling algorithm.

                   ACTIVE/INACTIVE/DYING/DEAD

                     The tributary is locked in the specified state.

                    NOTE: These values are incremented by one compared to
                    the standard DECnet values in order to maintain
                    compliance with RFC 1155."
               ::= { phivControlParametersEntry 10 }

           phivControlPollingSubState OBJECT-TYPE
               SYNTAX INTEGER {
                   active (1),
                   inactive (2),
                   dying (3),
                   dead (4)
               }
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This value represents the tributary's state as
                   determined by the polling algorithm.  This applies
                   only when the polling state is AUTOMATIC and is
                   read-only to Network Management.  Polling-substate is
                   one of ACTIVE, INACTIVE, DYING, or DEAD.  It is
                   displayed as a tag on the polling state, for example:
                   AUTOMATIC-INACTIVE."
               ::= { phivControlParametersEntry 11 }

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    RFC 1289                  DECnet Phase IV MIB              December 1991

           phivControlTransTimer OBJECT-TYPE
               SYNTAX INTEGER (0..65535)
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This value represents the number of milliseconds to
                   delay between data message transmits. Milliseconds is
                   a decimal integer in the range 0-65535."
               DEFVAL { 0 }
               ::= { phivControlParametersEntry 12 }

           -- Ethernet Group

           -- The implementation of the Ethernet Group is mandatory
           -- for all systems which support ethernet links.

           -- Ethernet Parameters Table

           phivEthLinkParametersTable OBJECT-TYPE
               SYNTAX SEQUENCE OF PhivEthLinkParametersEntry
               ACCESS not-accessible
               STATUS mandatory
               DESCRIPTION
                   "Information about ethernet link parameters."
               ::= { ethernet 1}

           phivEthLinkParametersEntry OBJECT-TYPE
               SYNTAX PhivEthLinkParametersEntry
               ACCESS not-accessible
               STATUS mandatory
               DESCRIPTION
                   "Parameter information about ethernet links currently
                   known."
               INDEX     { phivEthLinkIndex }
               ::= { phivEthLinkParametersTable 1 }

           PhivEthLinkParametersEntry ::=
               SEQUENCE {
                   phivEthLinkIndex
                       INTEGER,
                   phivEthDesigRouterNodeAddr
                       PhivAddr,
                   phivEthMaxRouters
                       INTEGER (0..255),
                   phivEthRouterPri
                       INTEGER (0..127),
                   phivEthHardwareAddr
                       OCTET STRING

    DECnet Phase IV MIB Working Group                              [Page 43]

    RFC 1289                  DECnet Phase IV MIB              December 1991

                }
           phivEthLinkIndex OBJECT-TYPE
               SYNTAX INTEGER
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "The circuit over which this links information is
                   collected.  This is the same as phivCircuitIndex."
               ::= { phivEthLinkParametersEntry 1 }

           phivEthDesigRouterNodeAddr OBJECT-TYPE
               SYNTAX PhivAddr -- OCTET STRING (SIZE (2))
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This value is the address of the designated router."
               ::= { phivEthLinkParametersEntry 2 }

           phivEthMaxRouters OBJECT-TYPE
               SYNTAX INTEGER (0..255)
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This parameter is the maximum number of routers (other
                    than the executor itself) allowed on the circuit by
                    Routing for circuits that are owned by the executor
                    node."
               ::= { phivEthLinkParametersEntry 3 }

           phivEthRouterPri OBJECT-TYPE
               SYNTAX INTEGER (0..127)
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This parameter is the priority that this router is to
                    have in the selection of designated router for the
                    circuit on circuits that are owned by the executor
                    node."
               DEFVAL { 64 }
               ::= { phivEthLinkParametersEntry 4 }

           phivEthHardwareAddr OBJECT-TYPE
               SYNTAX OCTET STRING ( SIZE (6) )
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This read-only parameter is the address that is
                   associated with the line device hardware as seen by

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    RFC 1289                  DECnet Phase IV MIB              December 1991

                   the DECnet Software.  This value is not the same as
                   ifPhysAddress."
               ::= { phivEthLinkParametersEntry 5 }

           -- Counters Group

           -- The implementation of the Counters Group is mandatory for
           -- systems which only support DECnet style locking counters.

           -- Counters Table

           phivCountersCountTable OBJECT-TYPE
               SYNTAX SEQUENCE OF PhivCountersCountEntry
               ACCESS not-accessible
               STATUS mandatory
               DESCRIPTION
                   "Information about ethernet link counters."
               ::= { counters 1 }

           phivCountersCountEntry OBJECT-TYPE
               SYNTAX PhivCountersCountEntry
               ACCESS not-accessible
               STATUS mandatory
               DESCRIPTION
                   "Counter information about ethernet links currently
                   known.."
               INDEX     { phivCountersIndex }
               ::= { phivCountersCountTable 1 }

           PhivCountersCountEntry ::=
               SEQUENCE {
                   phivCountersIndex
                       INTEGER,
                   phivCountersCountBytesRecd
                       PhivCounter,
                   phivCountersCountBytesSent
                       PhivCounter,
                   phivCountersCountDataBlocksRecd
                       PhivCounter,
                   phivCountersCountDataBlocksSent
                       PhivCounter,
                   phivCountersCountEthUsrBuffUnav
                       PhivCounter (0..65535),
                   phivCountersCountMcastBytesRecd
                       PhivCounter,
                   phivCountersCountDataBlksRecd
                       PhivCounter,
                   phivCountersCountDataBlksSent

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    RFC 1289                  DECnet Phase IV MIB              December 1991

                       PhivCounter,
                   phivCountersCountMcastBlksRecd
                       PhivCounter,
                   phivCountersCountBlksSentDef
                       PhivCounter,
                   phivCountersCountBlksSentSingleCol
                       PhivCounter,
                   phivCountersCountBlksSentMultCol
                       PhivCounter,
                   phivCountersCountSendFailure
                       PhivCounter,
                   phivCountersCountCollDetectFailure
                       PhivCounter (0..65535),
                   phivCountersCountReceiveFailure
                       PhivCounter (0..65535),
                   phivCountersCountUnrecFrameDest
                       PhivCounter (0..65535),
                   phivCountersCountDataOver
                       PhivCounter (0..65535),
                   phivCountersCountSysBuffUnav
                       PhivCounter (0..65535),
                   phivCountersCountUsrBuffUnav
                       PhivCounter (0..65535)
                }
           phivCountersIndex OBJECT-TYPE
               SYNTAX INTEGER
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "The interface to which these counters apply.  This is
                   the same interface as identified by the same value of
                   phivLineIndex. This value is the IfIndex."
               ::= { phivCountersCountEntry 1 }

           phivCountersCountBytesRecd OBJECT-TYPE
               SYNTAX PhivCounter
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of bytes received over this link."
               ::= { phivCountersCountEntry 2 }

           phivCountersCountBytesSent OBJECT-TYPE
               SYNTAX PhivCounter
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of bytes sent over this link."

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    RFC 1289                  DECnet Phase IV MIB              December 1991

               ::= { phivCountersCountEntry 3 }

           phivCountersCountDataBlocksRecd OBJECT-TYPE
               SYNTAX PhivCounter
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of data blocks received over this link."
               ::= { phivCountersCountEntry 4 }

           phivCountersCountDataBlocksSent OBJECT-TYPE
               SYNTAX PhivCounter
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of data blocks sent over this link."
               ::= { phivCountersCountEntry 5 }

           phivCountersCountEthUsrBuffUnav OBJECT-TYPE
               SYNTAX PhivCounter (0..65535)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of user buffer unavailable errors over this
                   link."
               ::= { phivCountersCountEntry 6 }

           phivCountersCountMcastBytesRecd OBJECT-TYPE
               SYNTAX PhivCounter
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of multicast bytes received over this link."
               ::= { phivCountersCountEntry 7 }

           phivCountersCountDataBlksRecd OBJECT-TYPE
               SYNTAX PhivCounter
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of data blocks received over this link."
               ::= { phivCountersCountEntry 8 }

           phivCountersCountDataBlksSent OBJECT-TYPE
               SYNTAX PhivCounter
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION

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    RFC 1289                  DECnet Phase IV MIB              December 1991

                   "Number of data blocks sent over this link."
               ::= { phivCountersCountEntry 9 }

           phivCountersCountMcastBlksRecd OBJECT-TYPE
               SYNTAX PhivCounter
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of multicast blocks received over this link."
               ::= { phivCountersCountEntry 10 }

           phivCountersCountBlksSentDef OBJECT-TYPE
               SYNTAX PhivCounter
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of blocks sent, initially deferred over this
                   link."
               ::= { phivCountersCountEntry 11 }

           phivCountersCountBlksSentSingleCol OBJECT-TYPE
               SYNTAX PhivCounter
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of blocks sent, single collision over this link."
               ::= { phivCountersCountEntry 12 }

           phivCountersCountBlksSentMultCol OBJECT-TYPE
               SYNTAX PhivCounter
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of blocks sent, multiple collisions over this
                   link."
               ::= { phivCountersCountEntry 13 }

           phivCountersCountSendFailure OBJECT-TYPE
               SYNTAX INTEGER ( 0..65535 )
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of send failures over this link."
               ::= { phivCountersCountEntry 14 }

           phivCountersCountCollDetectFailure OBJECT-TYPE
               SYNTAX INTEGER ( 0..65535 )
               ACCESS read-only

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    RFC 1289                  DECnet Phase IV MIB              December 1991

               STATUS mandatory
               DESCRIPTION
                   "Number of collision detect check failures over this
                   link."
               ::= { phivCountersCountEntry 15 }

           phivCountersCountReceiveFailure OBJECT-TYPE
               SYNTAX INTEGER ( 0..65535 )
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of receive failures over this link."
               ::= { phivCountersCountEntry 16 }

           phivCountersCountUnrecFrameDest OBJECT-TYPE
               SYNTAX INTEGER ( 0..65535 )
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of unrecognized frame destinations over this
                   link."
               ::= { phivCountersCountEntry 17 }

           phivCountersCountDataOver OBJECT-TYPE
               SYNTAX INTEGER ( 0..65535 )
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of data overruns over this link."
               ::= { phivCountersCountEntry 18 }

           phivCountersCountSysBuffUnav OBJECT-TYPE
               SYNTAX INTEGER ( 0..65535 )
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of system buffer unavailables over this link."
               ::= { phivCountersCountEntry 19 }

           phivCountersCountUsrBuffUnav OBJECT-TYPE
               SYNTAX INTEGER ( 0..65535 )
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Number of user buffer unavailables."
               ::= { phivCountersCountEntry 20 }

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    RFC 1289                  DECnet Phase IV MIB              December 1991

           -- Adjacency Group

           -- The implementation of the Adjacency Group is mandatory for all
           -- conformant implementations of this memo.

           phivAdjTable OBJECT-TYPE
               SYNTAX SEQUENCE OF PhivAdjEntry
               ACCESS not-accessible
               STATUS mandatory
               DESCRIPTION
                   "The Adjacency Table."
               ::= { adjacency 1 }

           phivAdjEntry OBJECT-TYPE
               SYNTAX PhivAdjEntry
               ACCESS not-accessible
               STATUS mandatory
               DESCRIPTION
                   "There is one entry in the table for each adjacency."
               INDEX  { phivAdjCircuitIndex }
               ::= { phivAdjTable 1 }

           PhivAdjEntry ::=
               SEQUENCE {
                   phivAdjCircuitIndex
                       INTEGER,
                   phivAdjNodeAddr
                       PhivAddr,
                   phivAdjBlockSize
                       INTEGER,
                   phivAdjListenTimer
                       INTEGER (1..65535),
                   phivAdjCircuitEtherServPhysAddr
                       OCTET STRING,
                   phivAdjType
                       INTEGER,
                   phivAdjState
                       INTEGER,
                   phivAdjPriority
                       INTEGER,
                   phivAdjExecListenTimer
                       INTEGER (1..65535)
                }

           phivAdjCircuitIndex OBJECT-TYPE
               SYNTAX INTEGER
               ACCESS read-only
               STATUS mandatory

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    RFC 1289                  DECnet Phase IV MIB              December 1991

               DESCRIPTION
                   "A unique index value for each known circuit."
               ::= { phivAdjEntry 1 }

           phivAdjNodeAddr OBJECT-TYPE
               SYNTAX PhivAddr -- OCTET STRING (SIZE (2))
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "The address of the adjacent node."
               ::= { phivAdjEntry 2 }

           phivAdjBlockSize OBJECT-TYPE
               SYNTAX INTEGER
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This read-only parameter is the block size that was
                   negotiated with the adjacent Routing layer during Routing
                   initialization over a particular circuit. It includes the
                   routing header, but excludes the data link header. This
                   parameter is qualified by ADJACENT NODE."
               ::= { phivAdjEntry 3 }

           phivAdjListenTimer OBJECT-TYPE
               SYNTAX INTEGER (1..65535)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This value determines the maximum number of seconds
                   allowed to elapse before Routing receives some message
                   (either a Hello message or a user message) from the
                   adjacent node on the circuit. It was agreed during
                   Routing initialization with the adjacent Routing layer.
                   This parameter is qualified by ADJACENT NODE."
               ::= { phivAdjEntry 4 }

           phivAdjCircuitEtherServPhysAddr OBJECT-TYPE
               SYNTAX OCTET STRING ( SIZE (6) )
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This parameter indicates the Ethernet physical address
                   of an adjacent node that is being serviced on this
                   circuit. This parameter is a qualifier for SERVICE
                   SUBSTATE."
               ::= { phivAdjEntry 5 }

    DECnet Phase IV MIB Working Group                              [Page 51]

    RFC 1289                  DECnet Phase IV MIB              December 1991

           phivAdjType OBJECT-TYPE
               SYNTAX INTEGER {
                   routing-III (1),
                   nonrouting-III (2),
                   area (3),
                   routing-IV (4),
                   nonrouting-IV (5)
               }
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This parameter indicates the type of adjacency.

                   For adjacent nodes, this is a read-only parameter that
                   indicates the type of the reachable adjacent node.
                   NOTE: The routing-III and nonrouting-III values are
                   incremented by one compared to the standard DECnet
                   values in order to maintain compliance with RFC 1155)"
               ::= { phivAdjEntry 6 }

           phivAdjState OBJECT-TYPE
               SYNTAX INTEGER {
                   initializing (1),          -- Ethernet one-way
                   up (2),                    -- Ethernet two-way
                   run (3),                   -- The eight DDCMP/X.25 states
                   circuit-rejected (4),
                   data-link-start (5),
                   routing-layer-initialize (6),
                   routing-layer-verify (7),
                   routing-layer-complete (8),
                   off (9),
                   halt (10)
               }
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This value indicates the state of a router adjacency.
                   On adjacencies over a circuit of type
                   (phivCircuitCommonType) Ethernet, CI, or FDDI, with an
                   adjacent node of type (phivAdjType) ROUTING IV or AREA,
                   this variable is the state of the Ethernet
                   Initialization Layer for this adjacency, and can have
                   values INITIALIZING or UP. (See Section 9.1.1 of
                   DECnet Phase IV Routing Layer Functional Specification.)

                   On adjacencies over a circuit of type
                   (phivCircuitCommonType) Ethernet, CI, or FDDI, with an
                   adjacent node of type (phivAdjType) NONROUTING IV,

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    RFC 1289                  DECnet Phase IV MIB              December 1991

                   this variable will always take on the value UP.

                   On adjacencies over a circuit of type
                   (phivCircuitCommonType) DDCMP POINT, DDCMP CONTROL,
                   DDCMP TRIBUTARY, DDCMP DMC, or X.25, this variable is
                   the state of the Routing Layer Initialization Circuit
                   State. (See section 7.3, ibid.)  It can have values
                   between RUN and HALT.

                   On adjacencies over a circuit of type
                   (phivCircuitCommonType) OTHER, this variable may be
                   used in a manner consistent with the Initialization
                   Layer used on that circuit."
               ::= { phivAdjEntry 7 }

           phivAdjPriority OBJECT-TYPE
               SYNTAX INTEGER (0..255)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "Priority assigned by the adjacent node for this
                   circuit."
            ::= { phivAdjEntry 8 }

           phivAdjExecListenTimer OBJECT-TYPE
               SYNTAX INTEGER (1..65535)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This read-only value determines the maximum number of
                   seconds allowed to elapse before Routing receives some
                   message (either a Hello message or a user message) from
                   the adjacent node on the circuit. It was agreed during
                   Routing initialization with the adjacent Routing layer."
               ::= { phivAdjEntry 9 }

           -- Line Group

           -- The implementation of the Line Group is mandatory for all
           -- conformant implementations of this memo.

           phivLineTable OBJECT-TYPE
               SYNTAX SEQUENCE OF PhivLineEntry
               ACCESS not-accessible
               STATUS mandatory
               DESCRIPTION
                   "The Line Table."
               ::= { line 1 }

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           phivLineEntry OBJECT-TYPE
               SYNTAX PhivLineEntry
               ACCESS not-accessible
               STATUS mandatory
               DESCRIPTION
                   "There is one entry in the table for each line."
               INDEX  { phivLineIndex }
               ::= { phivLineTable 1 }

           PhivLineEntry ::=
               SEQUENCE {
                   phivLineIndex
                       INTEGER,
                   phivLineName
                       DisplayString,
                   phivLineState
                       INTEGER,
                   phivLineSubstate
                       INTEGER,
                   phivLineService
                       INTEGER,
                   phivLineDevice
                       DisplayString,
                   phivLineReceiveBuffs
                       INTEGER (0..65535),
                   phivLineProtocol
                       INTEGER,
                   phivLineServiceTimer
                       INTEGER (1..65535),
                   phivLineMaxBlock
                       INTEGER (1..65535)
               }

           phivLineIndex OBJECT-TYPE
               SYNTAX INTEGER
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "The line on which this entry's equivalence is effective.
                   This is the same as the IfIndex."
               ::= { phivLineEntry 1 }

           phivLineName OBJECT-TYPE
               SYNTAX DisplayString ( SIZE (0..16) )
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION

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    RFC 1289                  DECnet Phase IV MIB              December 1991

                   "The name of the line on this row of the table."
               ::= { phivLineEntry 2 }

           phivLineState OBJECT-TYPE
               SYNTAX INTEGER {
                        on (1),
                        off (2),
                        service (3),
                        cleared (4)
               }
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This value represents Network Management operational
                   state.
                   NOTE that these values are incremented by one compared to
                   the standard DECnet values."
               ::= { phivLineEntry 3 }

           phivLineSubstate OBJECT-TYPE
               SYNTAX INTEGER {
                       starting (1),
                       reflecting (2),
                       looping (3),
                       loading (4),
                       dumping (5),
                       triggering (6),
                       auto-service (7),
                       auto-loading (8),
                       auto-dumping (9),
                       auto-triggering (10),
                       synchronizing (11),
                       failed (12),
                       running (13)
               }
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This value represents the line's read-only Network
                   Management substate.
                   NOTE that these values are incremented by one compared to
                   the standard DECnet values."
               ::= { phivLineEntry 4 }

           phivLineService OBJECT-TYPE
               SYNTAX INTEGER {
                     starting (1),
                     reflecting (2),

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    RFC 1289                  DECnet Phase IV MIB              December 1991

                     looping (3),
                     other (4)
               }
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This value represents the line's read-only Network
                   Management service.
                   NOTE that these values are incremented by one compared to
                   the standard DECnet values and OTHER is a new addition."
               ::= { phivLineEntry 5 }

           phivLineDevice OBJECT-TYPE
               SYNTAX DisplayString ( SIZE (0..16) )
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This value represents the Physical Link device to be
                   used on the line."
               ::= { phivLineEntry 6 }

           phivLineReceiveBuffs OBJECT-TYPE
               SYNTAX INTEGER (0..65535)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This value represents the number of receive buffers
                   reserved for the line. It is a decimal number in
                   the range 0-65535.  0 is supported for those vendors
                   that do not reserve buffers on a per line basis and
                   use a pool of buffers that can be used by any line."
               ::= { phivLineEntry 7 }

           phivLineProtocol OBJECT-TYPE
               SYNTAX INTEGER {
                   ddcmp-point (1),
                   ddcmp-control (2),
                   ddcmp-tributary (3),
                   reserved (4),
                   ddcmp-dmc (5),
                   lapb (6),
                   ethernet (7),
                   ci (8),
                   qp2 (9),
                   other (14),
                   fddi (15)
               }
               ACCESS read-only

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               STATUS mandatory
               DESCRIPTION
                   "This value represents the protocol used on the line
                   device.  Note that these values are incremented by
                   one compared to the standard DECnet values."
               ::= { phivLineEntry 8 }

           phivLineServiceTimer OBJECT-TYPE
               SYNTAX INTEGER (1..65535)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This value represents the amount of time in
                   milliseconds allowed to elapse before a Data Link
                   receive request completes while doing service
                   operations."
               ::= { phivLineEntry 9 }

           phivLineMaxBlock OBJECT-TYPE
               SYNTAX INTEGER (1..65535)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This value represents the Data Link maximum block
                   size on the line."
               ::= { phivLineEntry 10 }

           -- Non Broadcast Line Group

           -- The implementation of the Non Broadcast Line Group is
           -- mandatory for all systems which implement non broadcast
           -- lines.

           phivNonBroadcastTable OBJECT-TYPE
               SYNTAX SEQUENCE OF PhivNonBroadcastEntry
               ACCESS not-accessible
               STATUS mandatory
               DESCRIPTION
                   "The Non Broadcast Table."
               ::= { nonBroadcastLine 1 }

           phivNonBroadcastEntry OBJECT-TYPE
               SYNTAX PhivNonBroadcastEntry
               ACCESS not-accessible
               STATUS mandatory
               DESCRIPTION
                   "There is one entry in the table for each
                   Non Broadcast line."

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    RFC 1289                  DECnet Phase IV MIB              December 1991

               INDEX  { phivNonBroadcastIndex }
               ::= { phivNonBroadcastTable 1 }

           PhivNonBroadcastEntry ::=
               SEQUENCE {
                   phivNonBroadcastIndex
                       INTEGER,
                   phivNonBroadcastController
                       INTEGER,
                   phivNonBroadcastDuplex
                       INTEGER,
                   phivNonBroadcastClock
                       INTEGER,
                   phivNonBroadcastRetransmitTimer
                       INTEGER (1..65535)
               }
           phivNonBroadcastIndex OBJECT-TYPE
               SYNTAX INTEGER
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "The Non Broadcast line on which this entry's
                   equivalence is effective.  This is the same value
                   as the IfIndex."
               ::= { phivNonBroadcastEntry 1 }

           phivNonBroadcastController OBJECT-TYPE
               SYNTAX INTEGER {
                     normal (1),
                     loopback (2),
                     other (3)
               }
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This value represents the Physical Link hardware
                   controller mode for the line device. The values
                   for controller-mode are:

                   NORMAL  For normal controller operating mode.

                   LOOPBACK For software controllable loopback of the
                   controller. On those devices that can support this
                   mode, it causes all transmitted messages to be looped
                   back from within the controller itself. This is
                   accomplished without any manual intervention other
                   than the setting of this parameter value.

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    RFC 1289                  DECnet Phase IV MIB              December 1991

            OTHER indicates function is not supported
                   Note that these values are incremented by one compared to
                   the standard DECnet values."
               ::= { phivNonBroadcastEntry 2 }

           phivNonBroadcastDuplex OBJECT-TYPE
               SYNTAX INTEGER {
                     full (1),
                     half (2)
               }
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This value represents the Physical Link hardware
                   duplex mode of the line device. The possible modes
                   are:

                   FULL   Full-duplex
                   HALF   Half-duplex

                   Note that these values are incremented by one compared to
                   the standard DECnet values."
               ::= { phivNonBroadcastEntry 3 }

           phivNonBroadcastClock OBJECT-TYPE
               SYNTAX INTEGER {
                      external (1),
                      internal (2),
                      other (3)
               }
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This value represents the Physical Link hardware clock
                   mode for the line device. The values for clock-mode are:

                   INTERNAL For software controllable loopback use of
                   the clock. On those devices that can support this
                   mode, it causes the device to supply a clock signal
                   such that a transmitted messages can be looped
                   back from outside the device. This may require manual
                   intervention other than the setting of this parameter
                   value. For example, the operator may have to connect
                   a loopback plug in place of the normal line.

                   EXTERNAL For normal clock operating mode, where the
                   clock signal is supplied externally to the controller.
                   Note that these values are incremented by one compared to

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    RFC 1289                  DECnet Phase IV MIB              December 1991

                   the standard DECnet values."
               ::= { phivNonBroadcastEntry 4 }

           phivNonBroadcastRetransmitTimer OBJECT-TYPE
               SYNTAX INTEGER (1..65535)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This value represents number of milliseconds before
                   the Data Link retransmits a block on the line. On
                   half-duplex lines, this parameter is the select timer."
               DEFVAL { 3000 }
               ::= { phivNonBroadcastEntry 5 }

           -- Area Parameters Group

           -- The implementation of the Area Parameters Group is mandatory
           -- for all systems which implement level 2 routing.

           phivAreaTable OBJECT-TYPE
               SYNTAX SEQUENCE OF PhivAreaEntry
               ACCESS not-accessible
               STATUS mandatory
               DESCRIPTION
                   "Table of information kept on all areas known to
                   this unit."
               ::= { area 1 }

           phivAreaEntry OBJECT-TYPE
               SYNTAX PhivAreaEntry
               ACCESS not-accessible
               STATUS mandatory
               DESCRIPTION
                   "The area routing information."
               INDEX  { phivAreaNum }
               ::= { phivAreaTable 1 }

           PhivAreaEntry ::=
               SEQUENCE {
                   phivAreaNum
                     INTEGER,
                   phivAreaState
                     INTEGER,
                   phivAreaCost
                     Gauge,
                   phivAreaHops
                     INTEGER,
                   phivAreaNextNode

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    RFC 1289                  DECnet Phase IV MIB              December 1991

                     PhivAddr,
                   phivAreaCircuitIndex
                     INTEGER
               }
           phivAreaNum OBJECT-TYPE
               SYNTAX INTEGER (0..64)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This value indicates the area number of this entry."
               ::= { phivAreaEntry 1 }

           phivAreaState OBJECT-TYPE
               SYNTAX INTEGER {
                  reachable (4),
                  unreachable (5)
               }
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "This value indicates the state of the area"
               ::= { phivAreaEntry 2 }

           phivAreaCost OBJECT-TYPE
               SYNTAX Gauge
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "The total cost over the current path to the
                    destination area. Cost is a value associated with
                    using a circuit. Routing routes messages (data)
                    along the path between 2 areas with the smallest
                    cost."
               ::= { phivAreaEntry 3 }

           phivAreaHops OBJECT-TYPE
               SYNTAX INTEGER (0..255)
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "The number of hops to a destination area. A hop is
                   the routing value representing the logical distance
                   between two areas in network."
               ::= { phivAreaEntry 4 }

           phivAreaNextNode OBJECT-TYPE
               SYNTAX PhivAddr
               ACCESS read-only

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    RFC 1289                  DECnet Phase IV MIB              December 1991

               STATUS mandatory
               DESCRIPTION
                   "The next node on the circuit used to get to the
                   area under scrutiny."
               ::= { phivAreaEntry 5 }

           phivAreaCircuitIndex OBJECT-TYPE
               SYNTAX INTEGER
               ACCESS read-only
               STATUS mandatory
               DESCRIPTION
                   "A unique index value for each known circuit."
               ::= { phivAreaEntry 6 }

           -- Additional Area Parameters

           phivAreaMaxCost OBJECT-TYPE
               SYNTAX INTEGER (1..1022)
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This value represents the maximum total path cost
                   allowed from the executor to any other level 2 routing
                   node. The AREA MAXIMUM COST number is decimal in the
                   range 1-1022. This parameter is only applicable if
                   the executor node is of type AREA."
               ::= { area 2 }

           phivAreaMaxHops OBJECT-TYPE
               SYNTAX INTEGER (1..30)
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This value represents the maximum number of routing hops
                   allowable from the executor to any other level 2
                   routing node.  This parameter is only applicable if the
                   executor node is of type AREA."
               ::= { area 3 }

           phivRouteMaxArea OBJECT-TYPE
               SYNTAX INTEGER (1..63)
               ACCESS read-write
               STATUS mandatory
               DESCRIPTION
                   "This value represents the largest area number and,
                   therefore, number of areas that can be known about
                   by the executor node's Routing. This parameter is only
                   applicable if the executor node is of type AREA."

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    RFC 1289                  DECnet Phase IV MIB              December 1991

               ::= { area 4 }

           END

    5.  Acknowledgements

       This document is the result of work undertaken the by DECnet Phase IV
       MIB working group. In addition, the special contributions and
       comments of the following members are also acknowledged:

         Chris Chiotasso, Sparticus
         Steven Hunter, National Energy Research Supercomputer Center,
         Lawrence Livermore National Laboratory

    6.  References

       Cerf, V., "IAB Recommendations for the Development of Internet
       Network Management Standards", RFC 1052, NRI, April 1988.

       Rose M., and K. McCloghrie, "Structure and Identification of
       Management Information for TCP/IP-based internets", RFC 1155,
       Performance Systems International, Hughes LAN Systems, May 1990.

       McCloghrie K., and M. Rose, "Management Information Base for Network
       Management of TCP/IP-based internets", RFC 1156, Hughes LAN Systems,
       Performance Systems International, May 1990.

       Case, J., Fedor, M., Schoffstall, M., and J. Davin, "Simple Network
       Management Protocol", RFC 1157, SNMP Research, Performance Systems
       International, Performance Systems International, MIT Laboratory for
       Computer Science, May 1990.

       McCloghrie K., and M. Rose, Editors, "Management Information Base for
       Network Management of TCP/IP-based internets", RFC 1213, Performance
       Systems International, March 1991.

       Rose, M., and K. McCloghrie, Editors, "Concise MIB Definitions", RFC
       1212, Performance Systems International, Hughes LAN Systems, March
       1991.

       Cook, J., Editor, "Definitions of Managed Objects for the Ethernet-
       like Interface Types", RFC 1284, Chipcom Corporation, December 1991.

       Digital Equipment Corporation, "DECnet-ULTRIX NCP Command Reference",
       Digital Equipment Corporation, Maynard, Massachusetts.

       Digital Equipment Corporation, "DECnet-ULTRIX USE Guide", Digital
       Equipment Corporation, Maynard, Massachusetts.

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    RFC 1289                  DECnet Phase IV MIB              December 1991

       Digital Equipment Corporation, "DECnet DIGITAL Network Architecture,
       Network Management Functional Specification", Version 4.0.0. Digital
       Equipment Corporation, Maynard, Massachusetts, July 1983.

       Digital Equipment Corporation, "DECnet DIGITAL Network Architecture,
       Routing Layer Functional Specification", Version 2.0.0.  Digital
       Equipment Corporation, Maynard, Massachusetts, May 1983.

    Security Considerations

       Security issues are not discussed in this memo.

    Author's Address

       Jon Saperia
       Digital Equipment Corporation
       40 Old Bolton Road
       Stow, Massachusetts 01775-1215

       Phone: 508-496-8333

       EMail: saperia@enet.dec.com

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