[Idr] Call for review and comments ------ Fw: [Bier] I-D Action: draft-ietf-bier-bgp-ls-bier-ext-17.txt

zhang.zheng@zte.com.cn Thu, 20 June 2024 08:19 UTC

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Subject: [Idr] Call for review and comments ------ Fw: [Bier] I-D Action: draft-ietf-bier-bgp-ls-bier-ext-17.txt
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Hi LSR, IDR working group, 
According to the suggestion from our ADs, we need more review and feedback from LSR and IDR working group before this draft is moved forward. 
So please review the newest version and provide feedback before 6th July: https://datatracker.ietf.org/doc/draft-ietf-bier-bgp-ls-bier-ext/.
Thank you for your review and comments!
Best regards,
Sandy (Secretary of BIER WG, on behalf of Tony and Greg)


From: internet-drafts@ietf.org <internet-drafts@ietf.org>
To: i-d-announce@ietf.org <i-d-announce@ietf.org>;
Cc: bier@ietf.org <bier@ietf.org>;
Date: 2024年03月18日 09:01
Subject: [Bier] I-D Action: draft-ietf-bier-bgp-ls-bier-ext-17.txt

Internet-Draft draft-ietf-bier-bgp-ls-bier-ext-17.txt is now available. It is
a work item of the Bit Indexed Explicit Replication (BIER) WG of the IETF.
   Title:   BGP Link-State extensions for BIER
   Authors: Ran Chen
            Zhaohui Zhang
            Vengada Prasad Govindan
            IJsbrand Wijnands
   Name:    draft-ietf-bier-bgp-ls-bier-ext-17.txt
   Pages:   11
   Dates:   2024-03-17
   Bit Index Explicit Replication (BIER) is an architecture that
   provides optimal multicast forwarding through a "BIER domain" without
   requiring intermediate routers to maintain any multicast related per-
   flow state.  BIER also does not require any explicit tree-building
   protocol for its operation.  A multicast data packet enters a BIER
   domain at a "Bit-Forwarding Ingress Router" (BFIR), and leaves the
   BIER domain at one or more "Bit-Forwarding Egress Routers" (BFERs).
   The BFIR router adds a BIER header to the packet.  The BIER header
   contains a bitstring in which each bit represents exactly one BFER to
   forward the packet to.  The set of BFERs to which the multicast
   packet needs to be forwarded is expressed by setting the bits that
   correspond to those routers in the BIER header.
   BGP Link-State (BGP-LS) enables the collection of various topology
   informations from the network, and the topology informations are used
   by the controller to calculate the fowarding tables and then
   propagate them onto the BFRs(instead of having each node to calculate
   on its own) and that can be for both inter-as and intra-as
   This document specifies extensions to the BGP Link-state address-
   family in order to advertise the BIER informations.
The IETF datatracker status page for this Internet-Draft is:
There is also an HTMLized version available at:
A diff from the previous version is available at:
Internet-Drafts are also available by rsync at:
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