{
  "draft": "draft-ietf-idr-bgp-ls-sr-policy-17",
  "doc_id": "RFC9857",
  "title": "Advertisement of Segment Routing Policies Using BGP - Link State",
  "authors": [
    "S. Previdi",
    "K. Talaulikar, Ed.",
    "J. Dong",
    "H. Gredler",
    "J. Tantsura"
  ],
  "format": [
    "XML",
    "TEXT",
    "HTML",
    "PDF"
  ],
  "page_count": "52",
  "pub_status": "PROPOSED STANDARD",
  "status": "PROPOSED STANDARD",
  "source": "Inter-Domain Routing",
  "abstract": "This document describes a mechanism used to collect Segment Routing (SR) Policy information that is locally available in a node and advertise it into BGP - Link State (BGP-LS) updates.  Such information can be used by external components for path computation, reoptimization, service placement, network visualization, etc.",
  "pub_date": "October 2025",
  "keywords": [
    "BGP",
    "BGP-LS",
    "Segment Routing",
    "SR",
    "SR Policy",
    "SR-MPLS",
    "SRv6",
    "Traffic Engineering",
    "BGP SR Policy"
  ],
  "obsoletes": [],
  "obsoleted_by": [],
  "updates": [],
  "updated_by": [],
  "see_also": [],
  "doi": "10.17487/RFC9857",
  "errata_url": "https://www.rfc-editor.org/errata/rfc9857"
}