2.8.4 IP Performance Metrics (ippm)

NOTE: This charter is a snapshot of the 66th IETF Meeting in Montreal, Quebec Canada. It may now be out-of-date.

Last Modified: 2006-03-24


Henk Uijterwaal <henk@ripe.net>
Matthew Zekauskas <matt@internet2.edu>

Transport Area Director(s):

Magnus Westerlund <magnus.westerlund@ericsson.com>
Lars Eggert <lars.eggert@netlab.nec.de>

Transport Area Advisor:

Lars Eggert <lars.eggert@netlab.nec.de>

Technical Advisor(s):

Andy Bierman <ietf@andybierman.com>

Mailing Lists:

General Discussion: ippm@ietf.org
To Subscribe: https://www1.ietf.org/mailman/listinfo/ippm
In Body: subscribe
Archive: http://www.ietf.org/mail-archive/web/ippm/index.html

Description of Working Group:

Note: Andy Bierman serves as MIB advisor.

The IPPM WG will develop a set of standard metrics that can be applied
to the quality, performance, and reliability of Internet data delivery
services. These metrics will be designed such that they can be
performed by network operators, end users, or independent testing
groups. It is important that the metrics not represent a value
judgment (i.e. define "good" and "bad"), but rather provide unbiased
quantitative measures of performance.

Functions peripheral to Internet data delivery services, such as
NOC/NIC services, are beyond the scope of this working group.

The IPPM WG will produce documents that define specific metrics and
procedures for accurately measuring and documenting these metrics.
The metrics are:

  - connectivity

  - one-way delay and loss

  - round-trip delay and loss

  - delay variation

  - loss patterns

  - packet reordering

  - bulk transport capacity

  - link bandwidth capacity

This is the cumulative set, including the metricsalready completed
and published.

The working group will closely review and then be guided by an
IESG document on how metrics advance along the standards track within
the IETF.  This document will also be relevant to the work of the
benchmarking working group (BMWG).  The first draft of this document
was discussed at IETF 51. Additionally, the WG will produce Proposed
Standard AS documents, comparable to applicability statements in RFC
2026, that will focus on procedures for measuring the individual
metrics and how these metrics characterize features that are important
to different service classes, such as bulk transport, periodic
or multimedia streams. It is specifically out of scope for this
group to actually characterize traffic, for example to characterize a
voice-over-IP stream. Each AS document will discuss the performance
characteristics that are pertinent to a specified service class;
clearly identify the set of metrics that aid in the description of
those characteristics; specify the methodologies required to collect
said metrics; and lastly, present the requirements for the common,
unambiguous reporting of testing results. Specific topics of these
AS documents must be approved by the Area Directors as charter

The WG will produce a protocol to enable communication among test
equipment that implements the one-way metrics. The intent is to create
a protocol that provides a base level of functionality that will allow
different manufacturer's equipment that implements the metrics
according to a standard to interoperate. A protocol requirements
document will guide the protocol design.

The WG will also produce a MIB to retrieve the results of IPPM
metrics, such as one-way delay and loss, to facilitate the
communication of metrics to existing network management systems. Thus,
the group will create a MIB that contains predominantly read only
variables.  If, after the protocol requirements document is finished,
the group decides that it is appropriate to add variables that control
the underlying measurements that the metrics report, such a control
structure may be added as a separate document, subject to review by
the IESG.

The intent of the WG is to cooperate with other appropriate standards
bodies and forums (such as T1A1.3, ITU-T SG 12 and SG 13) to promote
consistent approaches and metrics. Within the IETF process, IPPM
metrics definitions will be subject to as rigorous a scrutiny for
usefulness, clarity, and accuracy as other protocol standards. The
IPPM WG will interact with other areas of IETF activity whose scope
intersect with the requirement of these specific metrics. These
include working groups such as BMWG, RMONMIB, and TEWG.

Goals and Milestones:

Done  Submit drafts of standard metrics for connectivity and treno-bulk-throughput.
Done  Submit a framework document describing terms and notions used in the IPPM effort, and the creation of metrics by the working group to IESG for publication as an Informational RFC.
Done  Submit documents on delay and loss to IESG for publication as Informational RFCs.
Done  Submit a document on connectivity to IESG for publication as an Informational RFC.
Done  Submit a document on bulk-throughput to IESG for publication as an Informational RFC.
Done  Submit draft on loss pattern sample metrics to the IESG for publication as an Informational RFC.
Done  Submit draft on metrics for periodic streams to the IESG for publication as a Proposed Standard RFC.
Done  Submit draft on IP delay variation to the IESG for publication as a Proposed Standard RFC.
Done  First draft for AS on one-way delay and loss.
Done  Submit draft on One-Way Active Measurement Protocol Requirements to the IESG for consideration as an Informational RFC.
Done  Create initial draft on a MIB for reporting IPPM metrics.
Done  Create initial draft on a packet reordering metric.
Done  Create draft on a One-Way Active Measurement Protocol that satisfies the requirements document.
Done  Submit draft on the One-Way Active Measurement Protocol to the IESG for consideration as a PS.
Done  Submit draft on implementation reports for RFCs 2678-2681 to the IESG
Done  Submit initial draft on framework for Composition and Aggregation Metrics
Done  Submit draft on the One-Way Active Measurement Protocol to the IESG for consideration as a PS
Jan 2006  Submit initial applicability statement for the IPPM and ITU Jitter Measurements to the WG
Done  Submit draft on a packet reordering metric to the IESG for Proposed Standard
Jun 2006  Submit draft on Two-way active measurements protocol (TWAMP) to the IESG for consideration as proposed standard
Jun 2006  Submit link bandwidth capacity definitions draft to the IESG, for consideration as an Informational RFC
Jun 2006  Submit draft on storing results of traceroute measurements to the IESG
Jun 2006  Develop new charter text
Dec 2006  Submit draft on spatial composition of metrics to the IESG
Dec 2006  Submit draft on Temporal Aggregation of Metrics to the IESG
Dec 2006  Submit draft on spatial decomposition and multicast metrics to the IESG


  • draft-ietf-ippm-reordering-13.txt
  • draft-ietf-ippm-bw-capacity-03.txt
  • draft-ietf-ippm-twamp-01.txt
  • draft-ietf-ippm-multimetrics-02.txt
  • draft-ietf-ippm-spatial-composition-02.txt
  • draft-ietf-ippm-framework-compagg-02.txt
  • draft-ietf-ippm-reporting-01.txt
  • draft-ietf-ippm-storetraceroutes-02.txt

    Request For Comments:

    RFC2330 I Framework for IP Performance Metrics
    RFC2678 E IPPM Metrics for Measuring Connectivity
    RFC2679 PS A One-way Delay Metric for IPPM
    RFC2680 PS A One-way Packet Loss Metric for IPPM
    RFC2681 PS A Round-trip Delay Metric for IPPM
    RFC3148 I A Framework for Defining Empirical Bulk Transfer Capacity Metrics
    RFC3357 I One-way Loss Pattern Sample Metrics
    RFC3393 PS IP Packet Delay Variation Metric for IPPM
    RFC3432 PS Network performance measurement for periodic streams
    RFC3763 I A One-way Active Measurement Protocol Requirements
    RFC4148 BCP IP Performance Metrics (IPPM) metrics registry
    RFC4656 PS A One-way Active Measurement Protocol (OWAMP)

    Meeting Minutes


    Agenda, status of drafts and milestones
    IMRG Happenings
    TWAMP Update
    TWAMP for In-Channel Performance Monitoring
    Traceroute Measurements: Information Model and XML Data Model
    Reporting IP Performance Metrics to Users
    Reporting Metrics: Different Points of View
    Framework for Metric Composition
    Spatial Composition Draft
    Capacity Draft
    Burst of Packets and Burstiness
    IPPM BCP Reporting Registry