BIER IPv6 Requirements
draft-ietf-bier-ipv6-requirements-03

Document Type Active Internet-Draft (bier WG)
Last updated 2019-11-02
Replaces draft-mcbride-bier-ipv6-requirements
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Network Working Group                                         M. McBride
Internet-Draft                                                 Futurewei
Intended status: Standards Track                                  J. Xie
Expires: May 5, 2020                                         S. Dhanaraj
                                                                  Huawei
                                                                R. Asati
                                                                   Cisco
                                                        November 2, 2019

                         BIER IPv6 Requirements
                  draft-ietf-bier-ipv6-requirements-03

Abstract

   The BIER WG includes, in its charter, work on developing mechanisms
   to transport BIER natively in IPv6.  This document is intended to
   help the WG with this effort by specifying requirements for
   transporting packets, with Bit Index Explicit Replication (BIER)
   headers, in an IPv6 environment.  There will be a need to send IPv6
   payloads, to multiple IPv6 destinations, using BIER.  There have been
   several proposed solutions in this area.  But there hasn't been a
   document which describes the problem and lists the requirements.  The
   goal of this document is to describe the BIER IPv6 requirements,
   summarize the proposed solutions, and guide the working group in
   understanding the benefits, and drawbacks, of the various solutions
   and to help in the development of acceptable solutions.

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
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   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 May 5, 2020.

McBride, et al.            Expires May 5, 2020                  [Page 1]
Internet-Draft           BIER IPv6 Requirements            November 2019

Copyright Notice

   Copyright (c) 2019 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
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   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.  Requirements Language . . . . . . . . . . . . . . . . . .   3
     1.2.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Problem Statement . . . . . . . . . . . . . . . . . . . . . .   3
   3.  BIER IPv6 Scenario's  . . . . . . . . . . . . . . . . . . . .   4
     3.1.  BIERv6 for Access Network . . . . . . . . . . . . . . . .   4
     3.2.  BIERv6 for Data Center  . . . . . . . . . . . . . . . . .   4
     3.3.  BIERv6 for Core Networks  . . . . . . . . . . . . . . . .   5
     3.4.  Implications for BIER in SRv6 . . . . . . . . . . . . . .   5
   4.  Requirements  . . . . . . . . . . . . . . . . . . . . . . . .   5
     4.1.  L2 Agnostic . . . . . . . . . . . . . . . . . . . . . . .   5
     4.2.  Hop by hop SA or DA modification  . . . . . . . . . . . .   5
     4.3.  L4 Inspection . . . . . . . . . . . . . . . . . . . . . .   6
     4.4.  Multicast address in SA field . . . . . . . . . . . . . .   7
     4.5.  Incorrect bits  . . . . . . . . . . . . . . . . . . . . .   7
     4.6.  SA filtering  . . . . . . . . . . . . . . . . . . . . . .   7
     4.7.  BIER architecture support . . . . . . . . . . . . . . . .   7
     4.8.  Simple Encapsulation  . . . . . . . . . . . . . . . . . .   8
     4.9.  Hardware fast path  . . . . . . . . . . . . . . . . . . .   8
     4.10. Conform to existing IPv6 Spec . . . . . . . . . . . . . .   8
     4.11. Support Fragmentation . . . . . . . . . . . . . . . . . .   8
     4.12. Support IPv6 Security . . . . . . . . . . . . . . . . . .   8
   5.  Solutions Evaluation  . . . . . . . . . . . . . . . . . . . .   8
     5.1.  BIER-ETH encapsulation in IPv6 networks . . . . . . . . .   9
     5.2.  Encode Bitstring in IPv6 destination address  . . . . . .  10
     5.3.  Add BIER header into IPv6 Extension Header  . . . . . . .  10
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