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Versions: 00 01 02 03 04 05 06 07 08 rfc4148                            
Network Working Group                                         E. Stephan

Internet Draft                                        France Telecom R&D

Document: draft-ietf-ippm-metrics-registry-00.txt          June 18, 2002





                         IPPM metrics registry

Status of this Memo

   This document is an Internet-Draft and is in full conformance with
   all provisions of Section 10 of RFC2026 [1].

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF), its areas, and its working groups. Note that other
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   The list of current Internet-Drafts can be accessed at
   http://www.ietf.org/ietf/1id-abstracts.txt.

   The list of Internet-Draft Shadow Directories can be accessed at
   http://www.ietf.org/shadow.html.


Abstract

   This memo defines a registry of the IPPM working group metrics. It
   provides an OBJECT IDENTIFIER to each metric currently standardized
   by the IPPM WG. It defines the rules for the identification of the
   metrics standardized in the future.

Table of Contents

   1.      Introduction................................................2
   2.      The IPPM Framework..........................................2
   3.      Overview....................................................2
   4.      IPPM metrics Registry framework.............................2
   4.1.    Metrics specified in a RFC..................................3
   4.2.    Metrics specified in a WG draft.............................4
   4.3.    Metrics specified in other documents........................5
   5.      Initial IPPM registry.......................................5
   6.      References..................................................6
   7.      Author's Addresses..........................................7





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1. Introduction

   This memo defines a registry of the IPPM working group metrics. It
   provides an OBJECT IDENTIFIER to each metric currently standardized
   by the IPPM WG. It defines the rules for the identification of the
   metrics standardized in the future.

2. The IPPM Framework

   The IPPM Framework consists in four major components:

        + A general framework for defining performance metrics,
        described  in the Framework for IP Performance Metrics, RFC
        2330;

        + A set of standardized metrics, which conform to this
        framework. The IPPM Metrics for Measuring Connectivity, RFC 2678
        [2]. The One-way Delay Metric for IPPM, RFC 2679 [3]. The One-
        way Packet Loss Metric for IPPM, RFC 2680 [4]. The Round-trip
        Delay Metric for IPPM, RFC 2681 [5];

        + Emerging metrics which are being specified in respect of this
        framework;

        + The IPPM-REPORTING-MIB for reporting the results of the
        measures and for interfacing heterogeneous measurement systems
        with management entities.


3. Overview

   This memo defines a registry of the current metrics and a framework
   for the integration of the future metrics for the following reasons:

        + to permit metrics to be clearly referenced by MIBs or other
        data models;

        + Metrics identifiers are needed to allow measurement
        interoperability;

        + Specification of new metrics is a continuous process, special
        care must be taken for the integration of the future
        standardized metrics.

4. IPPM metrics Registry framework

MIBs need OBJECT INDENTIFIER to refer precisely to the standardized
metrics. The registry associates an OBJECT IDENTIFIER to each metric. As
an example onewayDelay and onewayDelayPoissonStream have different
identifiers.


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The registry has three root branches. The category of the document
determines the node the branch the metric is identified in:

      + Metrics defined in a RFC are identified in the 'rfc' tree;
      + Metrics defined in a draft of a working group are identified in
the 'draft' tree;
      + Metrics defined elsewhere may be identified in the 'other' tree.
The name of the metric has to respect ASN.1 constraints. The name has to
start with a lower case. The letter - is forbidden (more or less) in the
name. In a way to preserve the readability of the metric name the
letters following a - are forced to upper case.

Sometime the name of the metric starts with 'Type-P'. It depends on the
document not the semantic of the metric. In the registry it is removed
from the name of the metric to reduce the length of the name and to
uniforms the metrics names.

Each sub-tree has specific rules to assign a node to a metric.

Each metrics specification will include a section describing its metrics
identifiers.

IPPM metrics are numbered using the specifications submissions order and
the metrics definitions order in each memo.

4.1. Metrics specified in a RFC

4.1.1. Rules

The metrics specified in a RFC are registered in the node rfc(1).

They are numbered using the RFC order and the metrics definitions order
in each memo.

The value assigned to a metric is definitive and can not be reused.

4.1.2. Current WG RFC integration in the registry

These rules are applied to initiate the registry. The metrics already
standardized are identified in the section 5 'IPPM registry' of this
memo.

4.1.3. Identification of the metrics standardized in future RFC

The specification of metrics is a continuous process. The same rules are
applied to number the metrics of the new RFC. The identifiers are
included in the section 'Standard metrics registry' of the RFC which
lists the identifier of the metrics at the format 'metricName OBJECT
IDENTIFIER ::= { rfc <metricNode> }'



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The temporary identifiers assigned previously to the draft corresponding
to the new RFC are considered obsolete and may be reassigned.

4.2. Metrics specified in a WG draft

Usually, metrics are implemented during the specification process. At
this step, a metric is not identified as an IPPM metric. There is a need
to provide temporary metric identifiers to facilitate software
integration and to permit interoperability measurement among different
implementations. Otherwise the interoperability will be extremely
limited du to the fact that implementers will choose arbitrary values to
identify the new metrics.

4.2.1. Rules

The metrics specified in an IPPM draft are registered in the node
draft(2).

A draft is more or less released two times a year. It looks ambiguous to
use the chronological order of the successive drafts submissions to
numbered the metrics because usually the metric name does not change
among the different releases. On the other hand new metrics may be added
in successive releases of a draft.

When a draft disappears the temporary identifiers assigned to the
metrics defined in the draft are considered obsolete and may be
reassigned.

4.2.2. Current WG drafts integration in the registry

The current drafts are numbered using the submission orders of their
current release and using the order of the metrics definition in each
memo.

The previous rules are applied to initiate the registry. The metrics
specified in current WG drafts are identified in the section 5 'IPPM
registry' of this memo.

4.2.3. Identification of a metric added to an existing WG draft

Despite new metrics are rarely created in successive releases of a
draft, an arbitrary metric identifier may be provided by the IPPM WG to
identify the new metric.

The identifier is added in the section named 'Draft metrics registry' of
the draft. This section list the identifier of the metrics at the format
'draftMetricName OBJECT IDENTIFIER ::= { draft <metricNode> }'

4.2.4. Identification of the metrics defined in future WG drafts



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They are numbered using the chronological orders of the first submission
of the draft and using the order of the metrics definition in each memo.

These identifiers are included in the draft in a section named 'Draft
metrics registry'. This section list the identifier of the metrics at
the format 'draftMetricName OBJECT IDENTIFIER ::= { draft <metricNode>
}'

4.3. Metrics specified in other documents

Other metrics may be associated with identifiers in the sub tree
other(4). The identifiers are provided by the IPPM WG.

These identifiers are included in the corresponding document in a
section named 'IPPM registry identifiers'. This section list the
identifier of the metrics at the format 'MetricName OBJECT IDENTIFIER
::= { other <metricNode> }'


5. Initial IPPM registry


   ippm         OBJECT IDENTIFIER       ::= XXXX -- To be assigned
   registry     OBJECT IDENTIFIER       ::= { ippm 1 }

   rfc          OBJECT IDENTIFIER       ::= { registry 1 }
   draft        OBJECT IDENTIFIER       ::= { registry 2 }
   other        OBJECT IDENTIFIER       ::= { registry 4 }

   --
   -- Registry of the metrics of the IPPM WG RFCs
   --


   instantaneousUnidirectionalConnectivity OBJECT IDENTIFIER::={rfc 1}
   instantaneousBidirectionalConnectivity OBJECT IDENTIFIER ::={rfc 2}
   intervalUnidirectionalConnectivity OBJECT IDENTIFIER ::= { rfc 3 }
   intervalBidirectionalConnectivity OBJECT IDENTIFIER ::= { rfc  4 }
   intervalTemporalConnectivity      OBJECT IDENTIFIER ::= { rfc  5 }
   onewayDelay                       OBJECT IDENTIFIER ::= { rfc  6 }
   onewayDelayPoissonStream        OBJECT IDENTIFIER ::= { rfc  7 }
   onewayDelayPercentile            OBJECT IDENTIFIER ::= { rfc  8 }
   onewayDelayMedian                OBJECT IDENTIFIER ::= { rfc  9 }
   onewayDelayMinimum               OBJECT IDENTIFIER ::= { rfc 10 }
   onewayDelayInversePercentile    OBJECT IDENTIFIER ::= { rfc 11 }
   onewayPacketLoss                 OBJECT IDENTIFIER ::= { rfc 12 }
   onewayPacketLossPoissonStream  OBJECT IDENTIFIER ::= { rfc 13 }
   onewayPacketLossAverage         OBJECT IDENTIFIER ::= { rfc 14 }
   roundtripDelay                    OBJECT IDENTIFIER ::= { rfc 15 }
   roundtripDelayPoissonStream     OBJECT IDENTIFIER ::= { rfc 16 }
   roundtripDelayPercentile         OBJECT IDENTIFIER ::= { rfc 17 }

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   roundtripDelayMedian             OBJECT IDENTIFIER ::= { rfc 18 }
   roundtripDelayMinimum            OBJECT IDENTIFIER ::= { rfc 19 }
   roundtripDelayInversePercentile OBJECT IDENTIFIER ::= { rfc 20 }

   --
   -- Registry of the metrics of the IPPM WG drafts
   --

   --
   -- One-way Loss Pattern Sample Metrics draft
   --

   oneWayLossDistanceStream OBJECT IDENTIFIER::={draft 1}
   oneWayLossPeriodStream OBJECT IDENTIFIER ::={draft 2}
   oneWayLossDistanceStream OBJECT IDENTIFIER ::= { draft 3 }
   oneWayLossPeriodStream OBJECT IDENTIFIER ::= { draft  4 }
   oneWayLossDistanceStream OBJECT IDENTIFIER ::= { draft  5 }
   oneWayLossPeriodStream OBJECT IDENTIFIER ::= { draft  6 }
   oneWayLossNoticeableRate OBJECT IDENTIFIER ::= { draft  7 }
   oneWayLossPeriodTotal OBJECT IDENTIFIER ::= { draft  8 }
   oneWayLossPeriodLengths OBJECT IDENTIFIER ::= { draft  9 }
   oneWayInterLossPeriodLengths OBJECT IDENTIFIER ::= { draft 10 }


   --
   -- Network performance measurement with periodic streams draft
   --

   oneWayDelayPeriodicStream OBJECT IDENTIFIER ::= { draft 11 }


   --
   -- IP Packet Delay Variation Metrics draft
   --

   oneWayIpdv OBJECT IDENTIFIER ::= { draft 12 }
   oneWayIpdvPoissonStream OBJECT IDENTIFIER ::= { draft 13 }
   oneWayIpdvPercentile OBJECT IDENTIFIER ::= { draft 14 }
   oneWayIpdvJitter OBJECT IDENTIFIER ::= { draft 15 }
   oneWayPeakToPeakIpdv OBJECT IDENTIFIER ::= { draft 16 }

   --
   -- Metrics registry from other documents
   --



6. References




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   [1] Bradner, S., "The Internet Standards Process -- Revision 3", BCP
      9, RFC 2026, October 1996.

   [2] Mahdavi J. and V. Paxson, "IPPM Metrics for Measuring
      Connectivity", RFC 2678, September 1999.

   [3] Almes, G.,  Kalidindi, S.  and M. Zekauskas, "A One-way Delay
      Metric for IPPM", RFC 2679, September 1999.

   [4] Almes, G., Kalidindi, S. and M. Zekauskas, "A One-way Packet
      Loss Metric for IPPM", RFC 2680, September 1999.

   [5]Almes, G., Kalidindi, S. and M. Zekauskas, "A Round-trip Delay
      Metric for IPPM.", RFC 2681, September 1999.



7. Author's Addresses

   Emile STEPHAN
   France Telecom R & D
   2 avenue Pierre Marzin
   F-22307 Lannion cedex
   Phone: (+ 33) 2 96 05 11 11
   Email: emile.stephan@francetelecom.com


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