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Signaling LDP Label Advertisement Completion
RFC 5919

Internet Engineering Task Force (IETF)                          R. Asati
Request for Comments: 5919                                  P. Mohapatra
Category: Standards Track                                  Cisco Systems
ISSN: 2070-1721                                                  E. Chen
                                                     Huawei Technologies
                                                               B. Thomas
                                                             August 2010

              Signaling LDP Label Advertisement Completion

Abstract

   There are situations following Label Distribution Protocol (LDP)
   session establishment where it would be useful for an LDP speaker to
   know when its peer has advertised all of its labels.  The LDP
   specification provides no mechanism for an LDP speaker to notify a
   peer when it has completed its initial label advertisements to that
   peer.  This document specifies means for an LDP speaker to signal
   completion of its initial label advertisements following session
   establishment.

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/rfc5919.

Asati, et al.                Standards Track                    [Page 1]
RFC 5919      Signaling LDP Label Advertisement Completion   August 2010

Copyright Notice

   Copyright (c) 2010 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
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   to this document.  Code Components extracted from this document must
   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 contain material from IETF Documents or IETF
   Contributions published or made publicly available before November
   10, 2008.  The person(s) controlling the copyright in some of this
   material may not have granted the IETF Trust the right to allow
   modifications of such material outside the IETF Standards Process.
   Without obtaining an adequate license from the person(s) controlling
   the copyright in such materials, this document may not be modified
   outside the IETF Standards Process, and derivative works of it may
   not be created outside the IETF Standards Process, except to format
   it for publication as an RFC or to translate it into languages other
   than English.

Table of Contents

   1. Introduction ....................................................3
      1.1. Applicability - Label Advertisement Mode ...................3
   2. Specification Language ..........................................3
   3. Unrecognized Notification Capability ............................4
   4. Signaling Completion of Label Advertisement .....................4
      4.1. Missing Expected End-of-LIB Notifications ..................5
   5. Usage Guidelines ................................................6
      5.1. LDP-IGP Sync ...............................................6
      5.2. LDP Graceful Restart .......................................7
      5.3. Wildcard Label Request .....................................7
   6. Security Considerations .........................................8
   7. IANA Considerations .............................................8
   8. Acknowledgments .................................................8
   9. References ......................................................8
      9.1. Normative References .......................................8
      9.2. Informative References .....................................9

Asati, et al.                Standards Track                    [Page 2]
RFC 5919      Signaling LDP Label Advertisement Completion   August 2010

1.  Introduction

   There are situations following LDP session establishment where it
   would be useful for an LDP speaker to know when its peer has
   advertised all of the labels from its Label Information Base (LIB).

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