{
  "draft": "draft-ietf-mpls-nodeid-subobject-07",
  "doc_id": "RFC4561",
  "title": "Definition of a Record Route Object (RRO) Node-Id Sub-Object",
  "authors": [
    "J.-P. Vasseur, Ed.",
    "Z. Ali",
    "S. Sivabalan"
  ],
  "format": [
    "TEXT",
    "HTML"
  ],
  "page_count": "10",
  "pub_status": "PROPOSED STANDARD",
  "status": "PROPOSED STANDARD",
  "source": "Multiprotocol Label Switching",
  "abstract": "In the context of MPLS TE Fast Reroute, the Merge Point (MP) address is required at the Point of Local Repair (PLR) in order to select a backup tunnel intersecting a fast reroutable Traffic Engineering Label Switched Path (TE LSP) on a downstream Label Switching Router (LSR).  However, existing protocol mechanisms are not sufficient to find an MP address in multi-domain routing networks where a domain is defined as an Interior Gateway Protocol (IGP) area or an Autonomous System (AS).  Hence, the current MPLS Fast Reroute mechanism cannot be used in order to protect inter-domain TE LSPs from a failure of an Area Border Router (ABR) or Autonomous System Border Router (ASBR).  This document specifies the use of existing Record Route Object (RRO) IPv4 and IPv6 sub-objects (with a new flag defined) thus defining the node-id sub-object in order to solve this issue.  The MPLS Fast Reroute mechanism mentioned in this document refers to the \"Facility backup\" MPLS TE Fast Reroute method. [STANDARDS-TRACK]",
  "pub_date": "June 2006",
  "keywords": [
    "multiprotocol label switching traffic engineering",
    "plr",
    "point of local repair",
    "igp",
    "interior gateway protocol",
    "as",
    "autonomous system",
    "abr",
    "area border router",
    "asbr",
    "autonomous system border router"
  ],
  "obsoletes": [],
  "obsoleted_by": [],
  "updates": [],
  "updated_by": [],
  "see_also": [],
  "doi": "10.17487/RFC4561",
  "errata_url": "https://www.rfc-editor.org/errata/rfc4561"
}