RFC9933 · Carrying SR-Algorithm in Path Computation Element Communication Protocol (PCEP)

{
  "id": "RFC9933",
  "number": 9933,
  "title_en": "Carrying SR-Algorithm in Path Computation Element Communication Protocol (PCEP)",
  "title_ru": "",
  "summary_ru": "",
  "purpose_ru": "",
  "use_ru": "",
  "full_translation_path": "",
  "full_translation_checked_at": "",
  "full_translation_source_sha256": "",
  "architect_note_ru": "",
  "topics_ru": [],
  "translation_state": "not_prepared",
  "verification_level": "not_prepared",
  "verification_level_ru": "Русская выжимка не подготовлена",
  "verification_note_ru": "",
  "abstract_en": "This document specifies extensions to the Path Computation Element Communication Protocol (PCEP) to enhance support for Segment Routing (SR) with a focus on the use of Segment Identifiers (SIDs) and SR-Algorithms in Traffic Engineering (TE). The SR-Algorithm associated with a SID defines the path computation algorithm used by Interior Gateway Protocols (IGPs). It introduces mechanisms for PCEP peers to signal the SR-Algorithm associated with SIDs by encoding this information in Explicit Route Object (ERO) and Record Route Object (RRO) subobjects, enables SR-Algorithm constraints for path computation, and defines new metric types for the METRIC object. This document updates RFC 8664 and RFC 9603 to allow such extensions.",
  "authors": [
    "S. Sidor",
    "Z. Rose",
    "S. Peng",
    "S. Peng",
    "A. Stone"
  ],
  "organizations": [],
  "publication_date": "2026-07-01",
  "current_status": "PROPOSED STANDARD",
  "current_status_ru": "Предлагаемый стандарт",
  "publication_status": "PROPOSED STANDARD",
  "publication_status_ru": "Предлагаемый стандарт",
  "lifecycle": "active",
  "lifecycle_ru": "Действующий",
  "stream": "IETF",
  "stream_ru": "IETF",
  "area": "rtg",
  "area_ru": "Маршрутизация",
  "working_group": "pce",
  "source_draft": "draft-ietf-pce-sid-algo-29",
  "page_count": 26,
  "doi": "10.17487/RFC9933",
  "keywords": [
    "Prefix-SID Algorithm",
    "Flexible Algorithm",
    "IGP Algorithm Types"
  ],
  "formats": [
    "HTML",
    "TXT",
    "PDF",
    "XML"
  ],
  "relations": {
    "obsoletes": [],
    "obsoleted_by": [],
    "updates": [
      "RFC8664",
      "RFC9603"
    ],
    "updated_by": [],
    "is_also": [],
    "see_also": []
  },
  "links": {
    "info": "https://www.rfc-editor.org/info/rfc9933/",
    "html": "https://www.rfc-editor.org/rfc/rfc9933.html",
    "txt": "https://www.rfc-editor.org/rfc/rfc9933.txt",
    "datatracker": "https://datatracker.ietf.org/doc/rfc9933/"
  }
}