Introduction to version 2 of the Internet-standard Network Management Framework
RFC 1441
Network Working Group J. Case
Request for Comments: 1441 SNMP Research, Inc.
K. McCloghrie
Hughes LAN Systems
M. Rose
Dover Beach Consulting, Inc.
S. Waldbusser
Carnegie Mellon University
April 1993
Introduction to version 2 of the
Internet-standard Network Management Framework
Status of this Memo
This RFC specifes 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 .......................................... 2
2 Components of the SNMPv2 Framework .................... 3
2.1 Structure of Management Information ................. 3
2.2 Textual Conventions ................................. 4
2.3 Protocol Operations ................................. 4
2.4 Transport Mappings .................................. 4
2.5 Protocol Instrumentation ............................ 5
2.6 Administrative Framework ............................ 5
2.7 Conformance Statements .............................. 5
3 Acknowledgements ...................................... 7
4 References ............................................ 11
5 Security Considerations ............................... 13
6 Authors' Addresses .................................... 13
Case, McCloghrie, Rose & Waldbusser [Page 1]
RFC 1441 Introduction to SNMPv2 April 1993
1. Introduction
The purpose of this document is to provide an overview of
version 2 of the Internet-standard Network Management
Framework, termed the SNMP version 2 framework (SNMPv2). This
framework is derived from the original Internet-standard
Network Management Framework (SNMPv1), which consists of these
three documents:
RFC 1155 [1] which defines the Structure of Management
Information (SMI), the mechanisms used for describing and
naming objects for the purpose of management.
RFC 1212 [2] which defines a more concise description
mechanism, which is wholly consistent with the SMI.
RFC 1157 [3] which defines the Simple Network Management
Protocol (SNMP), the protocol used for network access to
managed objects.
For information on coexistence between SNMPv1 and SNMPv2,
consult [4].
Case, McCloghrie, Rose & Waldbusser [Page 2]
RFC 1441 Introduction to SNMPv2 April 1993
2. Components of the SNMPv2 Framework
A network management system contains: several (potentially
many) nodes, each with a processing entity, termed an agent,
which has access to management instrumentation; at least one
management station; and, a management protocol, used to convey
management information between the agents and management
stations. Operations of the protocol are carried out under an
administrative framework which defines both authentication and
authorization policies.
Network management stations execute management applications
which monitor and control network elements. Network elements
are devices such as hosts, routers, terminal servers, etc.,
which are monitored and controlled through access to their
management information.
2.1. Structure of Management Information
Management information is viewed as a collection of managed
objects, residing in a virtual information store, termed the
Management Information Base (MIB). Collections of related
objects are defined in MIB modules. These modules are written
using a subset of OSI's Abstract Syntax Notation One (ASN.1)
[5]. It is the purpose of the Structure of Management
Information for SNMPv2 document [6] to define that subset.
The SMI is divided into three parts: module definitions,
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