{
  "draft": "draft-ietf-mpls-p2mp-bfd-11",
  "doc_id": "RFC9780",
  "title": "Bidirectional Forwarding Detection (BFD) for Multipoint Networks over Point-to-Multipoint MPLS Label Switched Paths (LSPs)",
  "authors": [
    "G. Mirsky",
    "G. Mishra",
    "D. Eastlake 3rd"
  ],
  "format": [
    "XML",
    "TEXT",
    "HTML",
    "PDF"
  ],
  "page_count": "12",
  "pub_status": "PROPOSED STANDARD",
  "status": "PROPOSED STANDARD",
  "source": "Multiprotocol Label Switching",
  "abstract": "This document describes procedures for using Bidirectional Forwarding Detection (BFD) for multipoint networks to detect data plane failures in point-to-multipoint MPLS Label Switched Paths (LSPs) and Segment Routing (SR) point-to-multipoint policies with an SR over MPLS (SR-MPLS) data plane.\n\n Furthermore, this document updates RFC 8562 by recommending the use of an IPv6 address from the Dummy IPv6 Prefix address block 100:0:0:1::/64 and discouraging the use of an IPv4 loopback address mapped to IPv6.\n\n In addition, this document describes the applicability of LSP Ping (as an in-band solution) and the control plane (as an out-of-band solution) to bootstrap a BFD session. The document also describes the behavior of the active tail for head notification.",
  "pub_date": "June 2025",
  "keywords": [
    "BFD",
    "Multipoint LSP"
  ],
  "obsoletes": [],
  "obsoleted_by": [],
  "updates": [
    "RFC8562"
  ],
  "updated_by": [],
  "see_also": [],
  "doi": "10.17487/RFC9780",
  "errata_url": null
}