Definitions of Managed Objects for the DS1, J1, E1, DS2, and E2 Interface Types
RFC 4805

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Network Working Group                                   O. Nicklass, Ed.
Request for Comments: 4805                 RAD Data Communications, Ltd.
Obsoletes: 3895                                               March 2007
Category: Standards Track

                     Definitions of Managed Objects
            for the DS1, J1, E1, DS2, and E2 Interface Types

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.

Copyright Notice

   Copyright (C) The IETF Trust (2007).

Abstract

   This memo defines a portion of the Management Information Base (MIB)
   for use with network management protocols in the Internet community.
   In particular, it describes objects used for managing DS1, J1, E1,
   DS2, and E2 interfaces.  This document is a companion to the
   documents that define managed objects for the DS0, DS3/E3, and
   Synchronous Optical Network/Synchronous Digital Hierarchy (SONET/SDH)
   Interface Types.

   This document obsoletes RFC 3895.

Nicklass, Ed.               Standards Track                     [Page 1]
RFC 4805                  DS1/J1/E1/DS2/E2 MIB                March 2007

Table of Contents

   1. The Internet-Standard Management Framework ......................2
   2. Conventions Used in This Document ...............................3
   3. Overview ........................................................3
      3.1. Use of ifTable for DS1 Layer ...............................4
      3.2. Usage Guidelines ...........................................5
           3.2.1. Usage of ifStackTable for Routers and DSUs ..........5
           3.2.2. Usage of ifStackTable for DS1/J1/E1 on DS2/E2 .......7
           3.2.3. Usage of Channelization for DS3, DS1, DS0 ...........8
           3.2.4. Usage of Channelization for DS3, DS2, DS1 ...........9
           3.2.5. Usage of Loopbacks .................................10
      3.3. Objectives of This MIB Module .............................10
      3.4. DS1 Terminology ...........................................11
           3.4.1. Error Events .......................................11
           3.4.2. Performance Defects ................................12
           3.4.3. Performance Parameters .............................13
           3.4.4. Failure States .....................................17
           3.4.5. Other Terms ........................................20
   4. Object Definitions .............................................20
   5. Security Considerations ........................................83
   6. Acknowledgments ................................................84
   7. References .....................................................84
      7.1. Normative References ......................................84
      7.2. Informative References ....................................86
   Appendix A - Use of dsx1IfIndex and dsx1LineIndex .................88
   Appendix B - The Delay Approach to Unavailable Seconds ............90
   Appendix C - Changes from Previous Versions .......................92
      C.1. Changes from RFC 3895 .....................................92
      C.2. Changes from RFC 2495 .....................................92
      C.3. Changes from RFC 1406 .....................................92
      C.4. Companion Documents .......................................93

1.  The Internet-Standard Management Framework

   For a detailed overview of the documents that describe the current
   Internet-Standard Management Framework, please refer to section 7 of
   RFC 3410 [RFC3410].

   Managed objects are accessed via a virtual information store, termed
   the Management Information Base or MIB.  MIB objects are generally
   accessed through the Simple Network Management Protocol (SNMP).
   Objects in the MIB are defined using the mechanisms defined in the
   Structure of Management Information (SMI).  This memo specifies a MIB
   module that is compliant to the SMIv2, which is described in STD 58,
   RFC 2578 [RFC2578], STD 58, RFC 2579 [RFC2579] and STD 58, RFC 2580
   [RFC2580].

Nicklass, Ed.               Standards Track                     [Page 2]
RFC 4805                  DS1/J1/E1/DS2/E2 MIB                March 2007

2.  Conventions Used in This Document

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

3.  Overview

   These objects are used when the particular media being used to
   realize an interface is a DS1/J1/E1/DS2/E2 interface.  At present,
   this applies to the following value of the ifType variable in the