Network Working Group A. Morton
Internet-Draft AT&T Labs
Intended status: Standards Track June 30, 2010
Expires: January 1, 2011
RFC 4148 and the IPPM Metrics Registry are Obsolete
draft-morton-ippm-rfc4148-obsolete-00
Abstract
This memo recommends that RFC 4148, the IP Performance Metrics (IPPM)
Registry be reclassified as Historic, and the IANA IPPM Metrics
Registry itself be withdrawn from use. The current registry
structure has been found to be insufficiently detailed to uniquely
identify IPPM metrics.
Requirements Language
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].
Status of this Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
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This Internet-Draft will expire on January 1, 2011.
Copyright Notice
Copyright (c) 2010 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Recommendation to Reclassify RFC 4148 and Withdraw the
corresponding IANA registry . . . . . . . . . . . . . . . . . . 3
3. Security Considerations . . . . . . . . . . . . . . . . . . . . 3
4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 3
5. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 4
6. References . . . . . . . . . . . . . . . . . . . . . . . . . . 4
6.1. Normative References . . . . . . . . . . . . . . . . . . . 4
6.2. Informative References . . . . . . . . . . . . . . . . . . 4
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 4
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1. Introduction
The IP Performance Metrics (IPPM) framework [RFC2330] describes
several ways to record options and metric parameter settings, in
order to account for sources of measurement variability. For
example, Section 13 of[RFC2330] describes the notion of "Type P" so
that metrics can be specified in general, but the specifics (such as
payload length in octets and protocol type) can replace P to
disambiguate the results.
When the IPPM Metric Registry [RFC4148] was designed, the variability
of the Type P notion, and the variability possible with the many
metric parameters (see Section 4.1 of [RFC2679] ) was not fully
appreciated. Further, some of the early metric definitions only
indicate Poisson streams [RFC2330] (see the metrics in [RFC2679],
[RFC2680], and [RFC3393]), but later work standardized the methods
for Periodic Stream measurements [RFC3432], adding to the variability
possible when characterizing a metric exactly.
It is not believed to be feasible or even useful to register every
possible combination of Type P, metric parameters, and Stream
parameters using the current structure of the IPPM Metric Registry.
2. Recommendation to Reclassify RFC 4148 and Withdraw the corresponding
IANA registry
Due to the ambiguities between the current metrics registrations and
the metrics used, and the apparent minimal adoption of the registry
in practice, this memo RECOMMENDS that:
o the IETF reclassify [RFC4148] as Historic
o the IANA withdraw the current IPPM Metrics Registry
It is assumed that parties who wish to establish a replacement
registry function will work to specify such a registry.
3. Security Considerations
This memo and its recommendations have no known impact on the
security of the Internet.
4. IANA Considerations
Metrics defined in IETF are typically registered in the IANA IPPM
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METRICS REGISTRY as described in initial version of the registry
[RFC4148]. However, areas for improvement of this registry have been
identified, and the registry structure has to be revisited when there
is consensus to do so.
The current consensus is to withdraw the IPPM Metrics Registry, as
originally described in [RFC4148].
5. Acknowledgements
6. References
6.1. Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC2330] Paxson, V., Almes, G., Mahdavi, J., and M. Mathis,
"Framework for IP Performance Metrics", RFC 2330,
May 1998.
[RFC2679] Almes, G., Kalidindi, S., and M. Zekauskas, "A One-way
Delay Metric for IPPM", RFC 2679, September 1999.
[RFC2680] Almes, G., Kalidindi, S., and M. Zekauskas, "A One-way
Packet Loss Metric for IPPM", RFC 2680, September 1999.
[RFC3393] Demichelis, C. and P. Chimento, "IP Packet Delay Variation
Metric for IP Performance Metrics (IPPM)", RFC 3393,
November 2002.
[RFC3432] Raisanen, V., Grotefeld, G., and A. Morton, "Network
performance measurement with periodic streams", RFC 3432,
November 2002.
[RFC4148] Stephan, E., "IP Performance Metrics (IPPM) Metrics
Registry", BCP 108, RFC 4148, August 2005.
6.2. Informative References
[Stats] "None", .
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Author's Address
Al Morton
AT&T Labs
200 Laurel Avenue South
Middletown,, NJ 07748
USA
Phone: +1 732 420 1571
Fax: +1 732 368 1192
Email: acmorton@att.com
URI: http://home.comcast.net/~acmacm/
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