BIER IPv6 Encapsulation (BIERv6) Support via IS-IS
draft-xie-bier-ipv6-isis-extension-02

Document Type Active Internet-Draft (individual)
Authors Jingrong Xie  , Aijun Wang  , Gang Yan  , Senthil Dhanaraj  , Xuesong Geng 
Last updated 2020-10-27
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Network Working Group                                             J. Xie
Internet-Draft                                       Huawei Technologies
Intended status: Standards Track                                 A. Wang
Expires: April 30, 2021                                    China Telecom
                                                                  G. Yan
                                                             S. Dhanaraj
                                                                 X. Geng
                                                     Huawei Technologies
                                                        October 27, 2020

           BIER IPv6 Encapsulation (BIERv6) Support via IS-IS
                 draft-xie-bier-ipv6-isis-extension-02

Abstract

   This document defines IS-IS extensions to support multicast
   forwarding using the Bit Index Explicit Replication (BIER) with IPv6
   encapsulation (BIERv6).

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in [RFC2119] and
   [RFC8174].

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 April 30, 2021.

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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 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.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Specification . . . . . . . . . . . . . . . . . . . . . . . .   3
     3.1.  Encapsulation sub-sub-TLV of End.BIER address . . . . . .   3
     3.2.  Encapsulation sub-sub-TLV of BIFT-id for each BSL . . . .   4
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   5
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
     5.1.  Encapsulation sub-sub-TLV Type Code . . . . . . . . . . .   5
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   5
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   5
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .   5
     7.2.  Informative References  . . . . . . . . . . . . . . . . .   6
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   6

1.  Introduction

   This document defines IS-IS extensions to support multicast
   forwarding using the Bit Index Explicit Replication (BIER) with IPv6
   encapsulation (BIERv6).

   The BIER IPv6 encapsulation [I-D.xie-bier-ipv6-encapsulation] uses a
   "BIER specific" IPv6 unicast address, the "End.BIER" address,
   configured locally on a BIER Forwarding Router (BFR) to indicate a
   "BIER specific handling" in Forwarding Information Base (FIB).  This
   BIER specific IPv6 address, used as part of BIER IPv6 encapsulation,
   is advertised as a type of Encapsulation sub-sub-TLV within the BIER
   Info sub-TLV defined [RFC8401].

   The BIFT-id field for each BSL of each Sub-domain is another part of
   BIER IPv6 encapsulation, and is advertised as a type of Encapsulation
   sub-sub-TLV within the BIER Info sub-TLV defined [RFC8401].

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   The BIER Sub-TLV is advertised within the extended IP reachability
   TLV as specified by in [RFC8401].

   Note the extended IP reachability only includes the TLV 236 (IPv6 IP
   Reach TLV) [RFC5308] and TLV 237 (MT IPv6 IP Reach TLVs) [RFC5120] in
   this document.
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