IPv6 Performance and Diagnostic Metrics (PDM) Destination Option
RFC 8250

Document Type RFC - Proposed Standard (September 2017; No errata)
Last updated 2017-09-30
Stream IETF
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Stream WG state Submitted to IESG for Publication (wg milestone: Aug 2016 - Submit a draft on th... )
Document shepherd Al Morton
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IESG IESG state RFC 8250 (Proposed Standard)
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Responsible AD Spencer Dawkins
Send notices to "Bill Cerveny" <ietf@wjcerveny.com>, "Al Morton" <acmorton@att.com>
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Internet Engineering Task Force (IETF)                         N. Elkins
Request for Comments: 8250                               Inside Products
Category: Standards Track                                    R. Hamilton
ISSN: 2070-1721                               Chemical Abstracts Service
                                                            M. Ackermann
                                                           BCBS Michigan
                                                          September 2017

    IPv6 Performance and Diagnostic Metrics (PDM) Destination Option

Abstract

   To assess performance problems, this document describes optional
   headers embedded in each packet that provide sequence numbers and
   timing information as a basis for measurements.  Such measurements
   may be interpreted in real time or after the fact.  This document
   specifies the Performance and Diagnostic Metrics (PDM) Destination
   Options header.  The field limits, calculations, and usage in
   measurement of PDM are included in this document.

Status of This Memo

   This is an Internet Standards Track document.

   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).  Further information on
   Internet Standards is available in Section 2 of RFC 7841.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   https://www.rfc-editor.org/info/rfc8250.

Elkins, et al.               Standards Track                    [Page 1]
RFC 8250               IPv6 PDM Destination Option        September 2017

Copyright Notice

   Copyright (c) 2017 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
   (https://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. Background ......................................................3
      1.1. Terminology ................................................3
      1.2. Rationale for Defined Solution .............................4
      1.3. IPv6 Transition Technologies ...............................4
   2. Measurement Information Derived from PDM ........................5
      2.1. Round-Trip Delay ...........................................5
      2.2. Server Delay ...............................................5
   3. Performance and Diagnostic Metrics Destination Option Layout ....6
      3.1. Destination Options Header .................................6
      3.2. Performance and Diagnostic Metrics Destination Option ......6
           3.2.1. PDM Layout ..........................................6
           3.2.2. Base Unit for Time Measurement ......................8
      3.3. Header Placement ...........................................9
      3.4. Header Placement Using IPsec ESP Mode ......................9
           3.4.1. Using ESP Transport Mode ...........................10
           3.4.2. Using ESP Tunnel Mode ..............................10
      3.5. Implementation Considerations .............................10
           3.5.1. PDM Activation .....................................10
           3.5.2. PDM Timestamps .....................................10
      3.6. Dynamic Configuration Options .............................11
      3.7. Information Access and Storage ............................11
   4. Security Considerations ........................................11
      4.1. Resource Consumption and Resource Consumption Attacks .....11
      4.2. Pervasive Monitoring ......................................12
      4.3. PDM as a Covert Channel ...................................12
      4.4. Timing Attacks ............................................13
   5. IANA Considerations ............................................13
   6. References .....................................................14
      6.1. Normative References ......................................14
      6.2. Informative References ....................................14

Elkins, et al.               Standards Track                    [Page 2]
RFC 8250               IPv6 PDM Destination Option        September 2017
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