{
  "draft": "draft-ietf-idr-bgp-prefix-sid-27",
  "doc_id": "RFC8669",
  "title": "Segment Routing Prefix Segment Identifier Extensions for BGP",
  "authors": [
    "S. Previdi",
    "C. Filsfils",
    "A. Lindem, Ed.",
    "A. Sreekantiah",
    "H. Gredler"
  ],
  "format": [
    "XML",
    "TEXT",
    "HTML",
    "PDF"
  ],
  "page_count": "15",
  "pub_status": "PROPOSED STANDARD",
  "status": "PROPOSED STANDARD",
  "source": "Inter-Domain Routing",
  "abstract": "Segment Routing (SR) leverages the source-routing paradigm. A node steers a packet through an ordered list of instructions called \"segments\". A segment can represent any instruction, topological or service based. The ingress node prepends an SR header to a packet containing a set of segment identifiers (SIDs). Each SID represents a topological or service-based instruction. Per-flow state is maintained only on the ingress node of the SR domain. An \"SR domain\" is defined as a single administrative domain for global SID assignment.\n\n This document defines an optional, transitive BGP attribute for announcing information about BGP Prefix Segment Identifiers (BGP Prefix-SIDs) and the specification for SR-MPLS SIDs.",
  "pub_date": "December 2019",
  "keywords": [
    "SR",
    "MPLS",
    "BGP",
    "Prefix-SID",
    "Label-Index",
    "SRGB"
  ],
  "obsoletes": [],
  "obsoleted_by": [],
  "updates": [],
  "updated_by": [],
  "see_also": [],
  "doi": "10.17487/RFC8669",
  "errata_url": "https://www.rfc-editor.org/errata/rfc8669"
}