BIER support via ISIS
draft-ietf-bier-isis-extensions-06

Document Type Active Internet-Draft (bier WG)
Last updated 2017-10-22
Replaces draft-przygienda-bier-isis-ranges
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Internet Engineering Task Force                         L. Ginsberg, Ed.
Internet-Draft                                             Cisco Systems
Intended status: Standards Track                           A. Przygienda
Expires: April 25, 2018                                 Juniper Networks
                                                               S. Aldrin
                                                                  Google
                                                                J. Zhang
                                                  Juniper Networks, Inc.
                                                        October 22, 2017

                         BIER support via ISIS
                   draft-ietf-bier-isis-extensions-06

Abstract

   Specification of an ISIS extension to support BIER domains and sub-
   domains.

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 RFC 2119 [RFC2119] .

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 April 25, 2018.

Copyright Notice

   Copyright (c) 2017 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Ginsberg, et al.         Expires April 25, 2018                 [Page 1]
Internet-Draft       draft-ietf-bier-isis-extensions        October 2017

   This document is subject to BCP 78 and the IETF Trust's Legal
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   4
   4.  Concepts  . . . . . . . . . . . . . . . . . . . . . . . . . .   4
     4.1.  BIER Domains and Sub-Domains  . . . . . . . . . . . . . .   4
     4.2.  Advertising BIER Information  . . . . . . . . . . . . . .   5
   5.  Procedures  . . . . . . . . . . . . . . . . . . . . . . . . .   5
     5.1.  Multi Topology and Sub-Domain . . . . . . . . . . . . . .   5
     5.2.  Encapsulation . . . . . . . . . . . . . . . . . . . . . .   5
     5.3.  BIER Algorithm  . . . . . . . . . . . . . . . . . . . . .   5
     5.4.  Label advertisements for MPLS Encapsulation . . . . . . .   6
     5.5.  BFR-id Advertisements . . . . . . . . . . . . . . . . . .   6
     5.6.  Reporting Misconfiguration  . . . . . . . . . . . . . . .   6
     5.7.  Flooding Reduction  . . . . . . . . . . . . . . . . . . .   6
   6.  Packet Formats  . . . . . . . . . . . . . . . . . . . . . . .   6
     6.1.  BIER Info sub-TLV . . . . . . . . . . . . . . . . . . . .   6
     6.2.  BIER MPLS Encapsulation sub-sub-TLV . . . . . . . . . . .   7
     6.3.  Optional BIER sub-domain BSL conversion sub-sub-TLV . . .   8
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   9
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   9
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   9
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .   9
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  10
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  10

1.  Introduction

   Bit Index Explicit Replication (BIER)
   [I-D.draft-ietf-bier-architecture-08] defines an architecture where
   all intended multicast receivers are encoded as bitmask in the
   Multicast packet header within different encapsulations such as
   [I-D.draft-ietf-bier-mpls-encapsulation-10].  A router that receives
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