BIER support via ISIS
draft-ietf-bier-isis-extensions-07

Document Type Active Internet-Draft (bier WG)
Last updated 2018-02-09
Replaces draft-przygienda-bier-isis-ranges
Stream IETF
Intended RFC status Proposed Standard
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Document shepherd Hooman Bidgoli
Shepherd write-up Show (last changed 2018-02-01)
IESG IESG state In Last Call (ends 2018-02-22)
Consensus Boilerplate Yes
Telechat date On agenda of 2018-02-22 IESG telechat
Needs 6 more YES or NO OBJECTION positions to pass.
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Send notices to Hooman Bidgoli <hooman.bidgoli@nokia.com>
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Internet Engineering Task Force                         L. Ginsberg, Ed.
Internet-Draft                                             Cisco Systems
Intended status: Standards Track                           A. Przygienda
Expires: August 13, 2018                                Juniper Networks
                                                               S. Aldrin
                                                                  Google
                                                                J. Zhang
                                                  Juniper Networks, Inc.
                                                        February 9, 2018

                         BIER support via ISIS
                   draft-ietf-bier-isis-extensions-07

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.

   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/.

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   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 August 13, 2018.

Copyright Notice

   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Ginsberg, et al.         Expires August 13, 2018                [Page 1]
Internet-Draft       draft-ietf-bier-isis-extensions       February 2018

   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
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   3
   4.  Concepts  . . . . . . . . . . . . . . . . . . . . . . . . . .   4
     4.1.  BIER Domains and Sub-Domains  . . . . . . . . . . . . . .   4
     4.2.  Advertising BIER Information  . . . . . . . . . . . . . .   4
   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
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   8
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .   8
     9.2.  Informative References  . . . . . . . . . . . . . . . . .   9
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  10

1.  Introduction

   Bit Index Explicit Replication (BIER) [RFC8279] defines an
   architecture where all intended multicast receivers are encoded as
   bitmask in the Multicast packet header within different
   encapsulations such as [RFC8296].  A router that receives such a
   packet will forward the packet based on the Bit Position in the
   packet header towards the receiver(s), following a precomputed tree
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