{
  "draft": "draft-ietf-pwe3-redundancy-bit-09",
  "doc_id": "RFC6870",
  "title": "Pseudowire Preferential Forwarding Status Bit",
  "authors": [
    "P. Muley, Ed.",
    "M. Aissaoui, Ed."
  ],
  "format": [
    "TEXT",
    "HTML"
  ],
  "page_count": "35",
  "pub_status": "PROPOSED STANDARD",
  "status": "PROPOSED STANDARD",
  "source": "Pseudowire Emulation Edge to Edge",
  "abstract": "This document describes a mechanism for signaling the active and standby status of redundant Pseudowires (PWs) between their termination points. A set of Redundant PWs is configured between Provider Edge (PE) nodes in single-segment pseudowire (SS-PW) applications or between Terminating Provider Edge (T-PE) nodes in Multi-Segment Pseudowire (MS-PW) applications.\n\n In order for the PE/T-PE nodes to indicate the preferred PW to use for forwarding PW packets to one another, a new status bit is defined. This bit indicates a Preferential Forwarding status with a value of active or standby for each PW in a redundant set.\n\n In addition, a second status bit is defined to allow peer PE nodes to coordinate a switchover operation of the PW.\n\n Finally, this document updates RFC 4447 by adding details to the handling of the PW status code bits in the PW Status TLV.",
  "pub_date": "February 2013",
  "keywords": [
    "PW redundancy",
    "active PW",
    "standby PW",
    "primary PW",
    "secondary PW",
    "PW precedence"
  ],
  "obsoletes": [],
  "obsoleted_by": [],
  "updates": [
    "RFC4447"
  ],
  "updated_by": [
    "RFC7771"
  ],
  "see_also": [],
  "doi": "10.17487/RFC6870",
  "errata_url": "https://www.rfc-editor.org/errata/rfc6870"
}