BIER support via ISIS
draft-ietf-bier-isis-extensions-00

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Last updated 2015-04-28
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: October 29, 2015                                       Ericsson
                                                               S. Aldrin
                                                                  Google
                                                                J. Zhang
                                                  Juniper Networks, Inc.
                                                          April 27, 2015

                         BIER support via ISIS
                   draft-ietf-bier-isis-extensions-00

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
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   This Internet-Draft will expire on October 29, 2015.

Copyright Notice

   Copyright (c) 2015 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Ginsberg, et al.        Expires October 29, 2015                [Page 1]
Internet-Draft     draft-ietf-bier-isis-extensions-00         April 2015

   This document is subject to BCP 78 and the IETF Trust's Legal
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   (http://trustee.ietf.org/license-info) in effect on the date of
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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
   5.  Procedures  . . . . . . . . . . . . . . . . . . . . . . . . .   4
     5.1.  Enabling a BIER Sub-Domain  . . . . . . . . . . . . . . .   5
     5.2.  Multi Topology and Sub-Domain . . . . . . . . . . . . . .   5
     5.3.  Encapsulation . . . . . . . . . . . . . . . . . . . . . .   5
     5.4.  Tree Type . . . . . . . . . . . . . . . . . . . . . . . .   5
     5.5.  Label Advertisements for MPLS encapsulated BIER sub-
           domains . . . . . . . . . . . . . . . . . . . . . . . . .   5
       5.5.1.  Special Consideration . . . . . . . . . . . . . . . .   6
     5.6.  BFR-id Advertisements . . . . . . . . . . . . . . . . . .   6
     5.7.  Flooding  . . . . . . . . . . . . . . . . . . . . . . . .   6
   6.  Packet Formats  . . . . . . . . . . . . . . . . . . . . . . .   6
     6.1.  BIER Info sub-TLV . . . . . . . . . . . . . . . . . . . .   7
     6.2.  BIER MPLS Encapsulation sub-sub-TLV . . . . . . . . . . .   8
     6.3.  Optional BIER sub-domain Tree Type sub-sub-TLV  . . . . .   9
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  10
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  10
   9.  Normative References  . . . . . . . . . . . . . . . . . . . .  11
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  12

1.  Introduction

   Bit Index Explicit Replication (BIER)
   [I-D.draft-ietf-bier-architecture-00] 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-wijnands-mpls-bier-encapsulation-02].  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 for each of the bits in the packet.  Each receiver
   is represented by a unique bit in the bitmask.

Ginsberg, et al.        Expires October 29, 2015                [Page 2]
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