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LDP 'Typed Wildcard' Forwarding Equivalence Class (FEC) for PWid and Generalized PWid FEC Elements
RFC 6667

Internet Engineering Task Force (IETF)                           K. Raza
Request for Comments: 6667                                    S. Boutros
Category: Standards Track                                   C. Pignataro
ISSN: 2070-1721                                            Cisco Systems
                                                               July 2012

      LDP 'Typed Wildcard' Forwarding Equivalence Class (FEC) for
                 PWid and Generalized PWid FEC Elements

Abstract

   The "Typed Wildcard Forwarding Equivalence Class (FEC) Element"
   defines an extension to the Label Distribution Protocol (LDP) that
   can be used when requesting, withdrawing, or releasing all label
   bindings for a given FEC Element type is desired.  However, a Typed
   Wildcard FEC Element must be individually defined for each FEC
   Element type.  This specification defines the Typed Wildcard FEC
   Elements for the Pseudowire Identifier (PWid) (0x80) and Generalized
   PWid (0x81) FEC Element types.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by
   the Internet Engineering Steering Group (IESG).  Further
   information on Internet Standards is available in Section 2 of
   RFC 5741.

   Information about the current status of this document, any
   errata, and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc6667.

Copyright Notice

   Copyright (c) 2012 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must

Raza, et al.                 Standards Track                    [Page 1]
RFC 6667          PWid and Gen. PWid Typed Wildcard FEC        July 2012

   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

   This document may not be modified, and derivative works of it may not
   be created, except to format it for publication as an RFC or to
   translate it into languages other than English.

Table of Contents

   1. Introduction ....................................................2
   2. Typed Wildcard for PW FEC Elements ..............................3
   3. Applicability Statement .........................................4
   4. Operation .......................................................4
      4.1. PW Consistency Check .......................................5
      4.2. PW Graceful Shutdown .......................................5
      4.3. Wildcard PW Status .........................................5
      4.4. Typed Wildcard MAC Withdrawal in VPLS ......................6
   5. Security Considerations .........................................6
   6. Acknowledgments .................................................7
   7. References ......................................................7
      7.1. Normative References .......................................7
      7.2. Informative References .....................................7

1.  Introduction

   An extension to the Label Distribution Protocol (LDP) [RFC5036]
   defines the general notion of a "Typed Wildcard Forwarding
   Equivalence Class (FEC) Element" [RFC5918].  This can be used when
   requesting, releasing, or withdrawing all label bindings for a given
   type of FEC Element is desired.  However, a Typed Wildcard FEC
   Element must be individually defined for each type of FEC Element.

   [RFC4447] defines the "PWid FEC Element" and "Generalized PWid FEC
   Element", but does not specify the Typed Wildcard format for these
   elements.  This document specifies the format of the Typed Wildcard
   FEC Element for the "PWid FEC Element" and "Generalized PWid FEC
   Element".  The procedures for Typed Wildcard processing for PWid and
   Generalized PWid FEC Elements are the same as described in [RFC5918]
   for any Typed Wildcard FEC Element type.

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

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