Attribution Option for Extension Header Insertion
draft-herbert-6man-eh-attrib-01

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Network Working Group                                         T. Herbert
Internet-Draft                                                     Intel
Intended status: Experimental                               July 7, 2020
Expires: January 8, 2021

           Attribution Option for Extension Header Insertion
                    draft-herbert-6man-eh-attrib-01

Abstract

   This document defines an "attribution option" that provides
   attribution for IPv6 extension headers, Hop-by-Hop options, or
   Destination options that are inserted by intermediate nodes in the
   delivery path of a packet.  The purpose of this option is twofold:
   first it identifies the extension headers or options that have been
   inserted, secondly it attributes the inserted extension headers or
   options to the node responsible for inserting them.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on January 8, 2021.

Copyright Notice

   Copyright (c) 2020 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
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   include Simplified BSD License text as described in Section 4.e of

Herbert                  Expires January 8, 2021                [Page 1]
Internet-Draft             Attribution Option                  July 2020

   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Motivation for extension header insertion . . . . . . . .   3
     1.2.  Problems with extension header and options insertion  . .   4
     1.3.  Inserting Hop-by-Hop options  . . . . . . . . . . . . . .   5
     1.4.  Inserting Destination options . . . . . . . . . . . . . .   5
     1.5.  Inserting extension headers . . . . . . . . . . . . . . .   5
     1.6.  Scope . . . . . . . . . . . . . . . . . . . . . . . . . .   6
     1.7.  Requirements Language . . . . . . . . . . . . . . . . . .   6
   2.  Attribution Option  . . . . . . . . . . . . . . . . . . . . .   6
     2.1.  Format  . . . . . . . . . . . . . . . . . . . . . . . . .   6
       2.1.1.  Attribution Option with short identifier  . . . . . .   7
       2.1.2.  Attribution Option with IPv6 address identifier . . .   8
     2.2.  Model . . . . . . . . . . . . . . . . . . . . . . . . . .   8
   3.  Operation . . . . . . . . . . . . . . . . . . . . . . . . . .   9
     3.1.  Insertion . . . . . . . . . . . . . . . . . . . . . . . .  10
       3.1.1.  Insertion procedure . . . . . . . . . . . . . . . . .  10
       3.1.2.  Errors during insertion . . . . . . . . . . . . . . .  11
     3.2.  Removal of inserted extension headers and options . . . .  12
       3.2.1.  Removal procedure . . . . . . . . . . . . . . . . . .  12
       3.2.2.  Errors during removal . . . . . . . . . . . . . . . .  13
     3.3.  Domain edge filtering . . . . . . . . . . . . . . . . . .  13
     3.4.  ICMP processing . . . . . . . . . . . . . . . . . . . . .  14
     3.5.  Processing AH . . . . . . . . . . . . . . . . . . . . . .  15
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .  15
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  15
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  16
     6.1.  Normative References  . . . . . . . . . . . . . . . . . .  16
     6.2.  Informative References  . . . . . . . . . . . . . . . . .  16
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  17

1.  Introduction

   Extension header insertion has been proposed as a mechanism to
   annotate packets for transit across controlled, or limited, domains
   ([I-D.voyer-6man-extension-header-insertion],
   [I-D.ietf-ippm-ioam-ipv6-options]).  These annotations are in the
   form of inserted Hop-by-Hop or Destination options, or other inserted
   extension headers (Segment Routing Header for example).  Presumably,
   before a packet egresses a controlled domain, any inserted extension