BIER in IPv6
draft-zhang-bier-bierin6-02
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BIER Z. Zhang
Internet-Draft ZTE Corporation
Intended status: Standards Track A. Przygienda
Expires: April 24, 2019 Juniper Networks, Inc.
October 21, 2018
BIER in IPv6
draft-zhang-bier-bierin6-02
Abstract
BIER is a new architecture for the forwarding of multicast data
packets. This document defines native IPv6 encapsulation for BIER
hop-by-hop forwarding or BIERin6 for short.
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.
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 24, 2019.
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
Zhang & Przygienda Expires April 24, 2019 [Page 1]
Internet-Draft BIERv6 October 2018
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. IPv6 Header . . . . . . . . . . . . . . . . . . . . . . . . . 2
3. BIER Header . . . . . . . . . . . . . . . . . . . . . . . . . 3
4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 3
5. Security Considerations . . . . . . . . . . . . . . . . . . . 3
6. References . . . . . . . . . . . . . . . . . . . . . . . . . 3
6.1. Normative References . . . . . . . . . . . . . . . . . . 4
6.2. Informative References . . . . . . . . . . . . . . . . . 4
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 4
1. Introduction
BIER [RFC8279] is a new architecture for the forwarding of multicast
data packets. It provides optimal forwarding through a "multicast
domain' and it does not necessarily precondition construction of a
multicast distribution tree, nor does it require intermediate nodes
to maintain any per-flow state.
[RFC8296] defines the BIER encapsulation format in MPLS and non-MPLS
environment that rely on MPLS labels or special ethernet type
support. In pure IPv6 environments a BIER packet could be forwarded
by means of simple IPv6 hop-by-hop processing only, without any new
hardware support. Ultimate hardware support is obviously possible
but the encapsulation is especially interesting for environments like
[RFC7368] where high throughput multicast forwarding performance is
not decisive and could be initially done in slow-path or end host
(assuming last-hop being IPv6 encapsulated).
This document defines native BIER IPv6 [RFC2460] encapsulation we
call BIERv6. This encapsulation is aligned with the format defined
in [RFC8296] for a non-mpls version.
This document uses terminology defined in [RFC8279].
2. IPv6 Header
The BIER packet itself is the payload of an IPv6 frame. The
destination address field in IPv6 packet MAY be the neighbor's link-
local or one of the loopback interface addresses of that neighbor.
The destination address SHOULD be the BFR-prefix advertised by IGP/
Zhang & Przygienda Expires April 24, 2019 [Page 2]
Internet-Draft BIERv6 October 2018
BGP extensions for BIER. TTL value of 1 MUST be used on the IPv6
packet.
The source address field in IPv6 packet MAY be the loopback interface
address of the sending BFIR. The address SHOULD be the BFR-prefix
advertised in IGP/BGP extension.
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