rfc1660.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                                         B. Stewart
Request for Comments: 1660                                  Xyplex, Inc.
Obsoletes: 1318                                                July 1994
Category: Standards Track


        Definitions of Managed Objects for Parallel-printer-like
                      Hardware Devices using SMIv2

Status of this Memo

   This document 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

   1. Introduction ...............................................    1
   2. The SNMPv2 Network Management Framework ....................    1
   2.1 Object Definitions ........................................    2
   3. Overview ...................................................    2
   3.1 Relationship to Interface MIB .............................    2
   4. Definitions ................................................    3
   5. Acknowledgements ...........................................    9
   6. References .................................................    9
   7. Security Considerations ....................................   10
   8. Author's Address ...........................................   10

1.  Introduction

   This memo defines an extension to the Management Information Base
   (MIB) for use with network management protocols in the Internet
   community.  In particular, it defines objects for the management of
   Parallel-printer-like devices.

2.  The SNMPv2 Network Management Framework

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

      o    RFC 1442 [1] which defines the SMI, the mechanisms used for
           describing and naming objects for the purpose of management.

      o    STD 17, RFC 1213 [2] defines MIB-II, the core set of managed
           objects for the Internet suite of protocols.




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      o    RFC 1445 [3] which defines the administrative and other
           architectural aspects of the framework.

      o    RFC 1448 [4] which defines the protocol used for network
           access to managed objects.

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

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

3.  Overview

   The Parallel-printer-like Hardware Device MIB applies to interface
   ports that would most probably support the Character MIB.  The most
   common example is Centronics-like printer port.

   The Parallel-printer-like Hardware Device MIB is mandatory for all
   systems that have such a hardware port supporting services managed
   through some other MIB.

   The Parallel-printer-like Hardware Port MIB includes Centronics-like
   and Data-Products-like parallel physical links with a similar set of
   control signals.

   The MIB contains objects that relate to physical layer connections.

   The MIB comprises one base object and three tables, detailed in the
   following sections.  The tables contain objects for ports and input
   and output control signals.

3.1.  Relationship to Interface MIB

   The Parallel-printer-like MIB is one of many MIBs designed for
   layered use as described in the Interface MIB [5].  In most
   implementations where it is present, it will be in the lowest
   interface sublayer, that is, the Parallel-printer-like MIB represents
   the physical layer, providing service to higher layers such as the



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   Character MIB [6].

   Although it is unlikely that a parallel printer port will actually be
   used as a network interface, which is the intent of the Interface
   MIB, the Parallel-printer-like MIB is closely connected to the
   Character MIB, which can share hardware interfaces with network
   operation, and relate to the RS-232 MIB [7].

   The Interface MIB's ifTestTable and ifRcvAddressTable are not
   relevant to the Parallel-printer-like MIB.

   The Parallel-printer-like MIB is relevant for ifType values para(34)
   and perhaps others.

   The Parallel-printer-like MIB requires the conformance groups
   ifGeneralGroup, and ifFixedLengthGroup.

   Usefulness of error counters in this MIB depends on the octet
   counters in ifFixedLengthGroup.

4.  Definitions

   PARALLEL-MIB DEFINITIONS ::= BEGIN

   IMPORTS
       MODULE-IDENTITY, OBJECT-TYPE, NOTIFICATION-TYPE,
       Counter32, Integer32
           FROM SNMPv2-SMI
       InterfaceIndex
           FROM IF-MIB
       transmission
           FROM RFC1213-MIB
       MODULE-COMPLIANCE, OBJECT-GROUP
           FROM SNMPv2-CONF;


   para MODULE-IDENTITY
        LAST-UPDATED "9405261700Z"
        ORGANIZATION "IETF Character MIB Working Group"
        CONTACT-INFO
               "        Bob Stewart
                Postal: Xyplex, Inc.
                        295 Foster Street
                        Littleton, MA 01460

                   Tel: [phone]
                   Fax: [phone]
                E-mail: [e-mail]"



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        DESCRIPTION
               "The MIB module for Parallel-printer-like hardware devices."
       ::= { transmission 34 }


   -- Generic Parallel-printer-like information

   paraNumber OBJECT-TYPE
       SYNTAX Integer32
       MAX-ACCESS read-only
       STATUS current
       DESCRIPTION
           "The number of ports (regardless of their current
           state) in the Parallel-printer-like port table."
       ::= { para 1 }


   -- the Parallel-printer-like Port table

   paraPortTable OBJECT-TYPE
       SYNTAX SEQUENCE OF ParaPortEntry
       MAX-ACCESS not-accessible
       STATUS current
       DESCRIPTION
           "A list of port entries.  The number of entries is
           given by the value of paraNumber."
       ::= { para 2 }

   paraPortEntry OBJECT-TYPE
       SYNTAX ParaPortEntry
       MAX-ACCESS not-accessible
       STATUS current
       DESCRIPTION
           "Status and parameter values for a port."
       INDEX { paraPortIndex }
       ::= { paraPortTable 1 }

   ParaPortEntry ::=
       SEQUENCE {
           paraPortIndex
               InterfaceIndex,
           paraPortType
               INTEGER,
           paraPortInSigNumber
               Integer32,
           paraPortOutSigNumber
               Integer32
       }



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   paraPortIndex OBJECT-TYPE
       SYNTAX InterfaceIndex
       MAX-ACCESS read-only
       STATUS current
       DESCRIPTION
           "The value of ifIndex for the port.  By convention
           and if possible, hardware port numbers map directly
           to external connectors.  The value for each port must
           remain constant at least from one re-initialization
           of the network management agent to the next."
       ::= { paraPortEntry 1 }

   paraPortType OBJECT-TYPE
       SYNTAX INTEGER {
           other(1),
           centronics(2),
           dataproducts(3)
       }
       MAX-ACCESS read-only
       STATUS current
       DESCRIPTION
           "The port's hardware type."
       ::= { paraPortEntry 2 }

   paraPortInSigNumber OBJECT-TYPE
       SYNTAX Integer32
       MAX-ACCESS read-only
       STATUS current
       DESCRIPTION
           "The number of input signals for the port in the
           input signal table (paraPortInSigTable).  The table
           contains entries only for those signals the software
           can detect and that are useful to observe."
       ::= { paraPortEntry 3 }

   paraPortOutSigNumber OBJECT-TYPE
       SYNTAX Integer32
       MAX-ACCESS read-only
       STATUS current
       DESCRIPTION
           "The number of output signals for the port in the
           output signal table (paraPortOutSigTable).  The
           table contains entries only for those signals the
           software can assert and that are useful to observe."
       ::= { paraPortEntry 4 }






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