rfc1304.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                                             T. Cox
Request For Comments: 1304                                     K. Tesink
                                                                 Editors
                                            Bell Communications Research
                                                           February 1992


                     Definitions of Managed Objects
                       for the SIP Interface Type

Status of this Memo

   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.

Abstract

   This memo defines a portion of the Management Information Base (MIB)
   for use with network management protocols in TCP/IP-based internets.
   In particular, it defines objects for managing SIP (SMDS Interface
   Protocol) objects.

Table of Contents

   1. The Network Management Framework ............................    2
   2. Objects .....................................................    2
   2.1 Format of Definitions ......................................    3
   3. Overview ....................................................    3
   4. Object Definitions ..........................................    4
   4.1 The SIP Level 3 group ......................................    4
   4.2 The SIP Level 2 group ......................................    8
   4.3 The SIP PLCP group .........................................   11
   4.3.1 The SIP DS1 PLCP group ...................................   12
   4.3.2 The SIP DS3 PLCP group ...................................   14
   4.4 The SMDS Applications group ................................   16
   4.5 The SMDS Carrier Selection group ...........................   18
   4.6 The SIP Error Log group ....................................   18
   5. Acknowledgments .............................................   23
   6. References ..................................................   23
   7. Security Considerations......................................   25
   8. Authors' Addresses...........................................   25







SNMP Working Group                                              [Page 1]

RFC 1304                      SIP Objects                  February 1992


1.  The Network Management Framework

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

      RFC 1155 [3] which defines the SMI, the mechanisms used for
      describing and naming objects for the purpose of management.  RFC
      1212 [9] defines a more concise description mechanism, which is
      wholly consistent with the SMI.

      RFC 1156 [4] which defines MIB-I, the core set of managed objects
      for the Internet suite of protocols.  RFC 1213 [6], defines MIB-
      II, an evolution of MIB-I based on implementation experience and
      new operational requirements.

      RFC 1157 [5] 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.  Objects

   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)
   International Standard 8824 [7] defined in the SMI.  In particular,
   each object has a name, a syntax, and an encoding.  The name is an
   object identifier, an administratively assigned name, which specifies
   an object type.  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
   OBJECT DESCRIPTOR, to also refer to the object type.

   The syntax of an object type defines the abstract data structure
   corresponding to that object type.  The ASN.1 language is used for
   this purpose.  However, the SMI RFC 1155 [3] purposely restricts the
   ASN.1 constructs which may be used.  These restrictions are
   explicitly made for simplicity.

   The encoding of an object type is simply how that object type is
   represented using the object type's syntax.  Implicitly tied to the
   notion of an object type's syntax and encoding is how the object type
   is represented when being transmitted on the network.  The SMI
   specifies the use of the basic encoding rules of ASN.1 International
   Standard 8825 [8], subject to the additional requirements imposed by
   the SNMP.




SNMP Working Group                                              [Page 2]

RFC 1304                      SIP Objects                  February 1992


2.1.  Format of Definitions

   Section 4 contains contains the specification of all object types
   contained in this MIB module.  The object types are defined using the
   conventions defined in the SMI, as amended by the extensions
   specified in RFC 1212 [9].

3.  Overview

   These objects are used when the particular media being used to
   realize an interface is a SIP interface.  At present, this applies to
   these values of the ifType variable in the Internet-standard MIB:

                  sip (31)

   For these interfaces, the value of the ifSpecific variable in the
   MIB-II [6] has the OBJECT IDENTIFIER value:

               sip    OBJECT IDENTIFIER ::= { transmission 31 }

   The definitions contained herein are based on the SIP specifications
   in Bellcore TR-TSV-000772 and TR-TSV-000773 [11,12].

   The SIP (SMDS Interface Protocol) protocol stack is defined as
   follows in TR-TSV-000772 [11]:

                               ___________________
                              |                   |
                              | SIP Level 3 [11]  |
                              |___________________|
                              |                   |
                              | SIP Level 2 [11]  |
                              |___________________|
                              |                   |
                              | PLCP [12]         |
                              |___________________|
                              |                   |
                              | DS1 or DS3 [12]   |
                              |___________________|

   The PLCP (Physical Layer Convergence Procedure) adapts the
   capabilities of the transmission system (DS1 or DS3 formats) to the
   service expected by SIP Level 2.  Managed objects for DS1 and DS3
   Interface Types are defined in RFC 1232 [13] and RFC 1233 [14]
   respectively (and amended in RFC 1239 [17]), and can be utilized for
   management of SIP interfaces. This document defines managed objects
   for the remaining protocol levels of the SIP Interface Type.  This
   document does not specify objects for the management of subscription



SNMP Working Group                                              [Page 3]

RFC 1304                      SIP Objects                  February 1992


   or configuration of Subscriber-Network Interfaces (SNIs). Those
   objects are defined in Definitions of Managed Objects for SMDS
   Subscription [18]. Bellcore requirements on these objects are
   specified in TA-TSV-001062 [16].

4.  Object Definitions

               RFC1304-MIB DEFINITIONS ::= BEGIN

               IMPORTS
                       Counter, TimeTicks, IpAddress
                               FROM RFC1155-SMI
                       transmission
                               FROM RFC1213-MIB
                       OBJECT-TYPE
                               FROM RFC-1212;

               --  This MIB module uses the extended OBJECT-TYPE macro
               --  as defined in RFC-1212.

               --  This is the MIB module for the SIP objects.


               sip     OBJECT IDENTIFIER ::= { transmission 31 }

               -- All representations of SMDS addresses in this MIB
               -- module use, as a textual convention (i.e., this
               -- convention does not affect their encoding), the
               -- data type:

               SMDSAddress ::= OCTET STRING (SIZE (8))
               -- the 60-bit SMDS address, preceded by 4 bits with the
               -- following values:
               -- "1100" when representing an individual address
               -- "1110" when representing a group address


               -- The SIP Level 3 group
               -- Implementation of the SIP Level 3 group is mandatory
               -- for all systems implementing SIP Level 3.

               sipL3Table  OBJECT-TYPE
                   SYNTAX  SEQUENCE OF SipL3Entry
                   ACCESS  not-accessible
                   STATUS  mandatory
                   DESCRIPTION
                           "This table contains SIP L3 parameters and
                           state variables, one entry per SIP port."



SNMP Working Group                                              [Page 4]

RFC 1304                      SIP Objects                  February 1992


                  ::= { sip 1 }

              sipL3Entry  OBJECT-TYPE
                  SYNTAX  SipL3Entry
                  ACCESS  not-accessible
                  STATUS  mandatory
                  DESCRIPTION
                          "This list contains SIP L3 parameters and
                          state variables."
                 INDEX   { sipL3Index }
                 ::= { sipL3Table 1 }

             SipL3Entry  ::= SEQUENCE {
                 sipL3Index
                     INTEGER,
                 sipL3ReceivedIndividualDAs
                     Counter,
                 sipL3ReceivedGAs
                     Counter,
                 sipL3UnrecognizedIndividualDAs
                     Counter,
                 sipL3UnrecognizedGAs
                     Counter,
                 sipL3SentIndividualDAs
                     Counter,
                 sipL3SentGAs
                     Counter,
                 sipL3Errors
                     Counter,
                 sipL3InvalidSMDSAddressTypes
                     Counter,
                 sipL3VersionSupport
                     INTEGER
                 }

             sipL3Index  OBJECT-TYPE
                 SYNTAX  INTEGER (1..65535)
                 ACCESS  read-only
                 STATUS  mandatory
                 DESCRIPTION
                         "The value of this object identifies the SIP
                         port interface for which this entry contains
                         management information.  The value of this
                         object for a particular interface has the same
                         value as the ifIndex object, defined in RFC
                         1156 and RFC 1213, for the same interface."
                ::= { sipL3Entry 1 }




SNMP Working Group                                              [Page 5]

RFC 1304                      SIP Objects                  February 1992


            sipL3ReceivedIndividualDAs OBJECT-TYPE
                SYNTAX  Counter
                ACCESS  read-only
                STATUS  mandatory
                DESCRIPTION
                        "The total number of individually addressed SIP
                        Level 3 PDUs received from the remote system
                        across the SNI.  The total includes only
                        unerrored L3PDUs."
               ::= { sipL3Entry 2 }

           sipL3ReceivedGAs OBJECT-TYPE
               SYNTAX  Counter
               ACCESS  read-only
               STATUS  mandatory
               DESCRIPTION
                       "The total number of group addressed SIP Level 3
                       PDUs received from the remote system across the
                       SNI.  The total includes only unerrored L3PDUs."
              ::= { sipL3Entry 3 }

          sipL3UnrecognizedIndividualDAs OBJECT-TYPE
              SYNTAX  Counter
              ACCESS  read-only
              STATUS  mandatory
              DESCRIPTION
                      "The number of SIP Level 3 PDUs received from the
                      remote system with invalid or unknown individual
                      destination addresses (Destination Address
                      Screening violations are not included).  See SMDS
                      Subscription MIB module."
              ::= { sipL3Entry 4 }

          sipL3UnrecognizedGAs OBJECT-TYPE
              SYNTAX  Counter
              ACCESS  read-only
              STATUS  mandatory
              DESCRIPTION
                      "The number of SIP Level 3 PDUs received from the
                      remote system with invalid or unknown group
                      addresses.  (Destination Address Screening
                      violations are not included).  See SMDS
                      Subscription MIB module."
              ::= { sipL3Entry 5 }

          sipL3SentIndividualDAs OBJECT-TYPE
              SYNTAX  Counter
              ACCESS  read-only



SNMP Working Group                                              [Page 6]

RFC 1304                      SIP Objects                  February 1992


              STATUS  mandatory
              DESCRIPTION
                      "The number of individually addressed SIP Level 3
                      PDUs that have been sent by this system across the
                      SNI."
              ::= { sipL3Entry 6 }

          sipL3SentGAs OBJECT-TYPE
              SYNTAX  Counter