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

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        RFC 9793

        Title:      BGP Extensions for Bit Index 
                    Explicit Replication (BIER) 
        Author:     X. Xu,
                    M. Chen,
                    K. Patel,
                    IJ. Wijnands,
                    T. Przygienda,
                    Z. Zhang, Ed.
        Status:     Standards Track
        Stream:     IETF
        Date:       June 2025 
        Mailbox:    xuxiaohu@cmss.chinamobile.com,
                    mach.chen@huawei.com,
                    keyur@arrcus.com,
                    ice@braindump.be,
                    prz@juniper.net,
                    zzhang@juniper.net
        Pages:      12
        Updates/Obsoletes/SeeAlso:   None

        I-D Tag:    draft-ietf-bier-idr-extensions-19.txt

        URL:        https://www.rfc-editor.org/info/rfc9793

        DOI:        10.17487/RFC9793

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.

This document is a product of the Bit Indexed Explicit Replication Working Group of the IETF.

This is now a Proposed Standard.

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 
memo is unlimited.

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