Bit Index Explicit Replication (BIER) Support via IS-IS
RFC 8401
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Type |
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RFC - Proposed Standard
(June 2018; No errata)
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Last updated |
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2018-06-07
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Replaces |
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draft-przygienda-bier-isis-ranges
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IETF
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plain text
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bibtex
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WG state
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Submitted to IESG for Publication
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Document shepherd |
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Hooman Bidgoli
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Shepherd write-up |
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Show
(last changed 2018-02-01)
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| IESG |
IESG state |
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RFC 8401 (Proposed Standard)
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Consensus Boilerplate |
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Yes
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Responsible AD |
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Alvaro Retana
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Hooman Bidgoli <hooman.bidgoli@nokia.com>, aretana.ietf@gmail.com
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| IANA |
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Version Changed - Review Needed
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RFC-Ed-Ack
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Internet Engineering Task Force (IETF) L. Ginsberg, Ed.
Request for Comments: 8401 Cisco Systems
Category: Standards Track A. Przygienda
ISSN: 2070-1721 Juniper Networks
S. Aldrin
Google
J. Zhang
Juniper Networks, Inc.
June 2018
Bit Index Explicit Replication (BIER) Support via IS-IS
Abstract
This document defines IS-IS extensions to support multicast
forwarding using the Bit Index Explicit Replication (BIER)
architecture.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 7841.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
https://www.rfc-editor.org/info/rfc8401.
Copyright Notice
Copyright (c) 2018 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.
Ginsberg, et al. Standards Track [Page 1]
RFC 8401 BIER Support via IS-IS June 2018
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1. Requirements Language . . . . . . . . . . . . . . . . . . 4
3. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 4
4. Concepts . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4.1. BIER Domains and Subdomains . . . . . . . . . . . . . . . 5
4.2. Advertising BIER Information . . . . . . . . . . . . . . 5
5. Procedures . . . . . . . . . . . . . . . . . . . . . . . . . 5
5.1. Multi-Topology and Subdomain . . . . . . . . . . . . . . 5
5.2. BFR-id Advertisements . . . . . . . . . . . . . . . . . . 6
5.3. Logging Misconfiguration . . . . . . . . . . . . . . . . 6
5.4. Flooding Reduction . . . . . . . . . . . . . . . . . . . 6
6. Packet Formats . . . . . . . . . . . . . . . . . . . . . . . 7
6.1. BIER Info Sub-TLV . . . . . . . . . . . . . . . . . . . . 7
6.2. BIER MPLS Encapsulation Sub-sub-TLV . . . . . . . . . . . 8
7. Security Considerations . . . . . . . . . . . . . . . . . . . 9
8. References . . . . . . . . . . . . . . . . . . . . . . . . . 10
8.1. Normative References . . . . . . . . . . . . . . . . . . 10
8.2. Informative References . . . . . . . . . . . . . . . . . 11
Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . 11
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 12
1. Introduction
Bit Index Explicit Replication (BIER) [RFC8279] defines an
architecture where all intended multicast receivers are encoded as a
bitmask in the multicast packet header within different
encapsulations such as described in [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 for each of the bits in the packet. Each receiver
is represented by a unique bit in the bitmask.
This document presents necessary extensions to the currently deployed
IS-IS for IP [RFC1195] to support distribution of information
necessary for operation of BIER domains and subdomains. This
document defines a new TLV to be advertised by every router
participating in BIER signaling.
This document defines support for MPLS encapsulation as specified in
[RFC8296]. Support for other encapsulation types and the use of
multiple encapsulation types are outside the scope of this document.
Ginsberg, et al. Standards Track [Page 2]
RFC 8401 BIER Support via IS-IS June 2018
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