RFC 8279 has been reclassified as Proposed Standard.
RFC 8279
Title: Multicast Using Bit Index Explicit
Replication (BIER)
Author: IJ. Wijnands, Ed.,
E. Rosen, Ed.,
A. Dolganow,
T. Przygienda,
S. Aldrin
Status: Standards Track
Stream: IETF
Date: November 2017
Pages: 43
Characters: 97283
Updates/Obsoletes/SeeAlso: None
I-D Tag: draft-ietf-bier-architecture-08.txt
URL: https://www.rfc-editor.org/info/rfc8279
DOI: 10.17487/RFC8279
This document specifies a new architecture for the forwarding of
multicast data packets. It provides optimal forwarding of multicast
packets through a "multicast domain". However, it does not require a
protocol for explicitly building multicast distribution trees, nor
does it require intermediate nodes to maintain any per-flow state.
This architecture is known as "Bit Index Explicit Replication"
(BIER). When a multicast data packet enters the domain, the ingress
router determines the set of egress routers to which the packet needs
to be sent. The ingress router then encapsulates the packet in a
BIER header. The BIER header contains a bit string in which each bit
represents exactly one egress router in the domain; to forward the
packet to a given set of egress routers, the bits corresponding to
those routers are set in the BIER header. The procedures for
forwarding a packet based on its BIER header are specified in this
document. Elimination of the per-flow state and the explicit
tree-building protocols results in a considerable simplification.
This document is a product of the Bit Indexed Explicit Replication Working
Group of the IETF.
STANDARDS TRACK: This document specifies an Internet Standards Track
protocol for the Internet community, and requests discussion and suggestions
for improvements. Please refer to the current edition of the Official
Internet Protocol Standards (https://www.rfc-editor.org/standards) for the
standardization state and status of this protocol. Distribution of this
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