Definitions of managed objects for the DS1 Interface type
RFC 1232

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Network Working Group                                           F. Baker
Request for Comments: 1232        Advanced Computer Communications, Inc.
                                                                 C. Kolb
                                 Performance Systems International, Inc.
                                                                 Editors
                                                                May 1991

                     Definitions of Managed Objects
                       for the DS1 Interface Type

Status of this Memo

   This memo defines objects for managing DS1 Interface objects for use
   with the SNMP protocol.  This memo is a product of the Transmission
   MIB Working Group of the Internet Engineering Task Force (IETF).
   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

   1. Abstract ..............................................    1
   2. The Network Management Framework.......................    2
   3. Objects ...............................................    2
   3.1 Format of Definitions ...............................     3
   4. Overview ..............................................    3
   4.1 Binding between Interfaces and CSUs .................     3
   4.2 Objectives of this MIB Module .......................     4
   4.3 DS1 Terminology .....................................     4
   5. Definitions ...........................................    6
   5.1 The DS1 Configuration Group .........................     6
   5.2 The DS1 Interval Group ..............................    13
   5.3 The DS1 Current Group ...............................    16
   5.4 The DS1 Total Group .................................    19
   5.5 The DS1 Fractional Group ............................    22
   6. Acknowledgements ......................................   25
   7. References ............................................   26
   8. Security Considerations................................   27
   9. Authors' Addresses.....................................   28

1.  Abstract

   This memo defines an experimental portion of the Management
   Information Base (MIB) for use with network management protocols in
   TCP/IP-based internets.  In particular, this memo defines MIB objects

Transmission MIB Working Group                                  [Page 1]
RFC 1232                 DS1 Interface Objects                  May 1991

   for representing DS1 physical interfaces.  Implementors should
   consult in addition to this memo the companion document that
   describes that DS3 managed objects.

2.  The Network Management Framework

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

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

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

      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.

3.  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) [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 [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.

Transmission MIB Working Group                                  [Page 2]