Advanced Stream and Sampling Framework for IP Performance Metrics (IPPM)
RFC 7312
Document | Type |
RFC - Informational
(August 2014; No errata)
Updates RFC 2330
|
|
---|---|---|---|
Authors | Joachim Fabini , Al Morton | ||
Last updated | 2015-10-14 | ||
Replaces | draft-morton-ippm-2330-update | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | Submitted to IESG for Publication | |
Document shepherd | Bill Cerveny | ||
Shepherd write-up | Show (last changed 2014-04-21) | ||
IESG | IESG state | RFC 7312 (Informational) | |
Consensus Boilerplate | Yes | ||
Telechat date | |||
Responsible AD | Spencer Dawkins | ||
Send notices to | (None) | ||
IANA | IANA review state | Version Changed - Review Needed | |
IANA action state | No IANA Actions |
Internet Engineering Task Force (IETF) J. Fabini Request for Comments: 7312 Vienna University of Technology Updates: 2330 A. Morton Category: Informational AT&T Labs ISSN: 2070-1721 August 2014 Advanced Stream and Sampling Framework for IP Performance Metrics (IPPM) Abstract To obtain repeatable results in modern networks, test descriptions need an expanded stream parameter framework that also augments aspects specified as Type-P for test packets. This memo updates the IP Performance Metrics (IPPM) Framework, RFC 2330, with advanced considerations for measurement methodology and testing. The existing framework mostly assumes deterministic connectivity, and that a single test stream will represent the characteristics of the path when it is aggregated with other flows. Networks have evolved and test stream descriptions must evolve with them; otherwise, unexpected network features may dominate the measured performance. This memo describes new stream parameters for both network characterization and support of application design using IPPM metrics. Status of This Memo This document is not an Internet Standards Track specification; it is published for informational purposes. This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Not all documents approved by the IESG are a candidate for any level of Internet Standard; see Section 2 of RFC 5741. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc7312. Fabini & Morton Informational [Page 1] RFC 7312 Advanced Sampling August 2014 Copyright Notice Copyright (c) 2014 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 (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1. Definition: Reactive Path Behavior . . . . . . . . . . . 4 1.2. Requirements Language . . . . . . . . . . . . . . . . . . 5 2. Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3. New or Revised Stream Parameters . . . . . . . . . . . . . . 5 3.1. Test Packet Type-P . . . . . . . . . . . . . . . . . . . 6 3.1.1. Multiple Test Packet Lengths . . . . . . . . . . . . 7 3.1.2. Test Packet Payload Content Optimization . . . . . . 7 3.2. Packet History . . . . . . . . . . . . . . . . . . . . . 8 3.3. Access Technology Change . . . . . . . . . . . . . . . . 8 3.4. Time-Slotted Randomness Cancellation . . . . . . . . . . 9 4. Quality of Metrics and Methodologies . . . . . . . . . . . . 10 4.1. Revised Definition of Repeatability . . . . . . . . . . . 10 4.2. Continuity No Longer an Alternative Repeatability Criterion . . . . . . . . . . . . . . . . . . . . . . . . 11 4.3. Metrics Should Be Actionable . . . . . . . . . . . . . . 12 4.4. It May Not Be Possible To Be Conservative . . . . . . . . 13 4.5. Spatial and Temporal Composition Support Unbiased Sampling . . . . . . . . . . . . . . . . . . . . . . . . 13 4.6. When to Truncate the Poisson Sampling Distribution . . . 13 5. Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . 14 6. Security Considerations . . . . . . . . . . . . . . . . . . . 14 7. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 14 8. References . . . . . . . . . . . . . . . . . . . . . . . . . 15 8.1. Normative References . . . . . . . . . . . . . . . . . . 15 8.2. Informative References . . . . . . . . . . . . . . . . . 16 Fabini & Morton Informational [Page 2] RFC 7312 Advanced Sampling August 2014 1. Introduction The IETF IPPM working group first created a framework for metric development in [RFC2330]. This framework has stood the test of timeShow full document text