rfc1559.txt

著名的RFC文档,其中有一些文档是已经翻译成中文的的.

Network Working Group                                         J. Saperia
Request for Comments: 1559                 Digital Equipment Corporation
Obsoletes: 1289                                            December 1993
Category: Standards Track


                     DECnet Phase IV MIB Extensions

Status of this Memo

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

Table of Contents

   1. Introduction ................................................  1
   2. The Network Management Framework ............................  2
   2.1 Object Definitions .........................................  2
   3. Selected Objects ............................................  3
   4. Textual Conventions .........................................  4
   5. Definitions .................................................  4
   6. Changes from RFC 1289 ....................................... 67
   7. Acknowledgements ...........................................  68
   8. References .................................................  68
   9. Security Considerations ....................................  69
   10. Author's Address ..........................................  69

1.  Introduction

   This memo defines a set of DECnet Phase IV extensions that have been
   created for the Internet MIB.  It reflects changes which are the
   result of operational experience based on RFC 1289.

   When used in conjunction with the structure of management information
   (STD 16, RFC 1155), the management information base for network
   management of TCP/IP-based internets (STD 17, RFC 1213) and the
   Simple Network Management Protocol (STD 15, 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).

   With the adoption of The Simple Network Management Protocol (STD 15,
   RFC 1157), the management information base for network management of
   TCP/IP-based internets (STD 17, RFC 1213), and the structure of



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   management information (STD 16, RFC 1155), by the Internet, and a
   large number of vendor 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.  The Network Management Framework

   The Internet-standard Network Management Framework consists of three
   components.  They are:

   o STD 16, RFC 1155 which defines the SMI, the mechanisms used for
     describing and naming objects for the purpose of management.
     STD 16, RFC 1212 defines a more concise description mechanism,
     which is wholly consistent with the SMI.

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

   o STD 15, RFC 1157 which defines the SNMP, the protocol used for
     network access to managed objects.

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

2.1  Object Definitions

   Managed objects are accessed via a virtual information store, termed
   the Management Information Base or MIB.  Objects in the MIB are
   defined using the subset of Abstract Syntax Notation One (ASN.1)
   defined in the SMI.  In particular, each object type is named by an



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   OBJECT IDENTIFIER, an administratively assigned name.  The object
   type together with an object instance serves to uniquely identify a
   specific instantiation of the object.  For human convenience, we
   often use a textual string, termed the descriptor, to refer to the
   object type.

3.  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:

        System Group
        Network Management Group
        Session Group
        End Group
        Routing Group
        Circuit Group
        DDCMP Group
        DDCMP Multipoint Control Group
        Ethernet Group
        Counters Group
        Adjacency Group
        Line Group
        Non Broadcast Line Group
        Area Group

   An effort has also been made to preserve the original syntax of each
   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.

   All objects in this memo are described using the standard Internet
   SMI and BER of STD 16, RFC 1155. A complete description of an object
   will include the name, syntax and encoding. Just as with objects
   supported in the MIB (STD 17, RFC 1213), 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
   STD 17, RFC 1213 - 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



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   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.

4.  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 5 (Definitions).

5.  Definitions

        DECNET-PHIV-MIB 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
   -- 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 restarted, or they are reset to zero by the user



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   -- or management software.

   InterfaceIndex ::= INTEGER
   --  The range of ifIndex, i.e., (1..2147483647)


   -- 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
                        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.



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            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 optional.
   -- A system can be said to implement this group if and only if
   -- all objects in this group are implemented.

   phivSessionSystemName OBJECT-TYPE
        SYNTAX DisplayString (SIZE (0..6))
        ACCESS read-only
        STATUS mandatory
        DESCRIPTION



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            "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 value of 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 value of 0
            indicates no timer is running."
        ::= { session 3 }

   -- End Communication Layer Group

   -- The implementation of the End Communication Layer Group is optional.
   -- A system can be said to implement this group if and only if
   -- all objects in this group are implemented.

   -- Remote State Table

   phivEndRemoteTable OBJECT-TYPE
        SYNTAX SEQUENCE OF PhivEndRemoteEntry
        ACCESS not-accessible
        STATUS mandatory
        DESCRIPTION