Observations on IPv6 EH Filtering in the Real World
draft-ietf-v6ops-ipv6-ehs-in-real-world-00

The information below is for an old version of the document
Document Type Active Internet-Draft (v6ops WG)
Last updated 2015-05-01 (latest revision 2015-04-23)
Replaces draft-gont-v6ops-ipv6-ehs-in-real-world
Stream IETF
Intended RFC status (None)
Formats pdf htmlized bibtex
Reviews
Stream WG state WG Document
Document shepherd No shepherd assigned
IESG IESG state I-D Exists
Consensus Boilerplate Unknown
Telechat date
Responsible AD (None)
Send notices to (None)
IPv6 Operations Working Group (v6ops)                            F. Gont
Internet-Draft                                    SI6 Networks / UTN-FRH
Intended status: Informational                                J. Linkova
Expires: October 23, 2015                                         Google
                                                                T. Chown
                                               University of Southampton
                                                                  W. Liu
                                                     Huawei Technologies
                                                          April 21, 2015

          Observations on IPv6 EH Filtering in the Real World
               draft-ietf-v6ops-ipv6-ehs-in-real-world-00

Abstract

   This document presents real-world data regarding the extent to which
   packets with IPv6 extension headers are filtered in the Internet (as
   measured in August 2014), and where in the network such filtering
   occurs.  The aforementioned results serve as a problem statement that
   is expected to trigger operational advice on the filtering of IPv6
   packets carrying IPv6 Extension Headers, so that the situation
   improves over time.  This document also explains how the
   aforementioned results were obtained, such that the corresponding
   measurements can be reproduced by other members of the community.

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
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on October 23, 2015.

Copyright Notice

   Copyright (c) 2015 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Gont, et al.            Expires October 23, 2015                [Page 1]
Internet-Draft           IPv6 Extension Headers               April 2015

   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  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Support of IPv6 Extension Headers in the Internet . . . . . .   3
   3.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   7
   5.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   7
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   7
     6.1.  Normative References  . . . . . . . . . . . . . . . . . .   7
     6.2.  Informative References  . . . . . . . . . . . . . . . . .   8
   Appendix A.  Reproducing Our Experiment . . . . . . . . . . . . .   9
     A.1.  Obtaining the List of Domain Names  . . . . . . . . . . .   9
     A.2.  Obtaining AAAA Resource Records . . . . . . . . . . . . .  10
     A.3.  Filtering the IPv6 Address Datasets . . . . . . . . . . .  10
     A.4.  Performing Measurements with Each IPv6 Address Dataset  .  11
     A.5.  Obtaining Statistics from our Measurements  . . . . . . .  12
   Appendix B.  Measurements Caveats . . . . . . . . . . . . . . . .  13
     B.1.  Isolating the Dropping Node . . . . . . . . . . . . . . .  13
     B.2.  Obtaining the Responsible Organization for the Packet
           Drops . . . . . . . . . . . . . . . . . . . . . . . . . .  14
   Appendix C.  Troubleshooting Packet Drops due to IPv6 Extension
                Headers  . . . . . . . . . . . . . . . . . . . . . .  15
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  15

1.  Introduction

   IPv6 Extension Headers (EHs) allow for the extension of the IPv6
   protocol, and provide support for core functionality such as IPv6
   fragmentation.  While packets employing IPv6 Extension Headers have
   been suspected to be dropped in some IPv6 deployments, there was not
   much concrete data on the topic.  Some preliminary measurements have
   been presented in [PMTUD-Blackholes], [Gont-IEPG88] and
   [Gont-Chown-IEPG89], whereas [Linkova-Gont-IEPG90] presents more
Show full document text