IPv6 Hop-by-Hop Options Processing Procedures
draft-hinden-6man-hbh-processing-00

Document Type Active Internet-Draft (individual)
Authors Bob Hinden  , Gorry Fairhurst 
Last updated 2020-12-03
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Network Working Group                                          R. Hinden
Internet-Draft                                      Check Point Software
Updates: 8200 (if approved)                                 G. Fairhurst
Intended status: Standards Track                  University of Aberdeen
Expires: 6 June 2021                                     3 December 2020

             IPv6 Hop-by-Hop Options Processing Procedures
                  draft-hinden-6man-hbh-processing-00

Abstract

   This document specifies procedures for how IPv6 Hop-by-Hop options
   are processed.  It modifies the procedures specified in the IPv6
   Protocol Specification (RFC8200) to make processing in routers more
   practical with the goal of making IPv6 Hop-by-Hop options useful to
   deploy in the Internet.  When published, this document updates
   RFC8200.

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 https://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 6 June 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
   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

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   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.  Requirements Language . . . . . . . . . . . . . . . . . . . .   2
   3.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  Background  . . . . . . . . . . . . . . . . . . . . . . . . .   3
   5.  Hop-by-Hop Header Processing Procedures . . . . . . . . . . .   5
     5.1.  Hop-by-Hop Options Per Packet . . . . . . . . . . . . . .   5
     5.2.  Hop-by-Hop Headers Processing . . . . . . . . . . . . . .   6
     5.3.  Configuration . . . . . . . . . . . . . . . . . . . . . .   6
   6.  Hop-by-Hop Option Header Alignment  . . . . . . . . . . . . .   7
     6.1.  Hop-by-Hop Options that Meet Alignment Requirement  . . .   7
     6.2.  Hop-by-Hop Options that Must be Deprecated or Modified  .   8
     6.3.  Destination Options and Deprecated Hop-by-Hop Options . .   8
   7.  New Hop-by-Hop Options  . . . . . . . . . . . . . . . . . . .   8
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   10. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   8
   11. Change log [RFC Editor: Please remove]  . . . . . . . . . . .   8
   12. Normative References  . . . . . . . . . . . . . . . . . . . .   9
   13. Informative References  . . . . . . . . . . . . . . . . . . .   9
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  11

1.  Introduction

   This document specifies procedures for how IPv6 Hop-by-Hop options
   are processed.  It modifies the procedures specified in the IPv6
   Protocol Specification (RFC8200) to make processing in routers more
   practical with the goal of making IPv6 Hop-by-Hop options useful to
   deploy in the Internet.

   When published this document updates [RFC8200].

   The current list of defined Hop-by-Hop options can be found at
   [IANA-HBH].

2.  Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in BCP
   14 [RFC2119] [RFC8174] when, and only when, they appear in all
   capitals, as shown here.

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3.  Terminology

   This document uses the following loosely defined terms:

   *  Fast path: Hardware or Application-Specific Integrated Circuit
      (ASIC) processing path for packets.  This is the usual processing
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