IP Version 6 Management Information Base for the User Datagram Protocol
RFC 2454
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RFC - Historic
(December 1998; No errata)
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Michael Daniele
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2013-03-02
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RFC 2454 (Historic)
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Network Working Group M. Daniele
Request for Comments: 2454 Compaq Computer Corporation
Category: Standards Track December 1998
IP Version 6 Management Information Base
for the User Datagram Protocol
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 Internet Society (1998). All Rights Reserved.
Abstract
This document is one in the series of documents that define various
MIB objects for IPv6. Specifically, this document is the MIB module
which defines managed objects for implementations of the User
Datagram Protocol (UDP) over IP Version 6 (IPv6).
This document also recommends a specific policy with respect to the
applicability of RFC 2013 for implementations of IPv6. Namely, that
most of managed objects defined in RFC 2013 are independent of which
IP versions underlie UDP, and only the UDP listener information is IP
version-specific.
This memo defines an experimental portion of the Management
Information Base (MIB) for use with network management protocols in
IPv6-based internets.
1. Introduction
A 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
authentication, authorization, access control, and privacy policies.
Daniele Standards Track [Page 1]
RFC 2454 UDP MIB for IPv6 December 1998
Management stations execute management applications which monitor and
control managed elements. Managed elements are devices such as
hosts, routers, terminal servers, etc., which are monitored and
controlled via access to their 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) [1], termed the Structure of
Management Information (SMI) [2].
2. Overview
This document is one in the series of documents that define various
MIB objects, and statements of conformance, for IPv6. This document
defines the required instrumentation for implementations of UDP over
IPv6.
3. Transparency of IP versions to UDP
The fact that UDP is carried over IPv6 as opposed to IPv4, is largely
invisible to a UDP implementation. A "UDPng" did not need to be
defined, implementations simply need to support IPv6 addresses.
As such, the managed objects already defined in [UDP MIB] are
sufficient for managing UDP in the presence of IPv6. These objects
are equally applicable whether the managed node supports IPv4 only,
IPv6 only, or both IPv4 and IPv6.
For example, udpInDatagrams counts "The total number of UDP datagrams
delivered to UDP users", regardless of which version of IP is used to
deliver any of those datagrams.
Stated differently, UDP implementations don't need separate counters
for IPv4 and for IPv6.
4. Representing UDP Listeners
The exception to the statements in section 3 is the udpTable. Since
IPv6 addresses cannot be represented with the IpAddress syntax, not
all UDP endpoints can be represented in the udpTable defined in [UDP
MIB].
This memo defines a new, separate table to represent only those UDP
endpoints that utilize an IPv6 address. UDP endpoints on IPv4
addresses continue to be represented in udpTable [UDP MIB].
Daniele Standards Track [Page 2]
RFC 2454 UDP MIB for IPv6 December 1998
A different approach would have been to define a new table to
represent all UDP endpoints regardless of IP version. This would
require changes to [UDP MIB] and hence to existing (IPv4-only) UDP
implementations. The approach suggested in this memo has the
advantage of leaving IPv4-only implementations intact.
It is assumed that the objects defined in this memo will eventually
be defined in an update to [UDP MIB]. For this reason, the module
identity is assigned under the experimental portion of the MIB.
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