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RFC 9793: BGP Extensions for Bit Index Explicit Replication (BIER)

In plain English — editorial summary, not part of the RFC

Bit Index Explicit Replication (BIER) is a multicast forwarding architecture that doesn't require an explicit tree-building protocol and doesn't require intermediate routers to maintain per-tree multicast states. Some BIER-specific information and states, which are only in proportion to the number of BIER routers but not per-tree, do need to be advertised, calculated, and maintained. This document describes BGP extensions for advertising the BIER information and methods for calculating BIER states based on the advertisements.

Document record

Document ID
RFC9793
Published
June 2025
Authors
X. Xu; M. Chen; K. Patel; IJ. Wijnands; T. Przygienda; Z. Zhang
Status
PROPOSED STANDARD
Stream
IETF
Area
rtg
Pages
12
Also known as
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The document record above — title, authors, date, status, stream, area, relationships, DOI and errata — is imported verbatim from the public RFC Editor index. The “in plain English” section is editorial: written by The metasystema editorial team, not part of the RFC. Where the two differ, the RFC text governs.

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canonical URL: /rfc/9793-bgp-extensions-for-bit-index-explicit-replication-bier