Updates to LDP for IPv6
RFC 7552

Document Type RFC - Proposed Standard (June 2015; No errata)
Last updated 2015-06-05
Replaces draft-manral-mpls-ldp-ipv6
Stream IETF
Formats plain text pdf html
Stream WG state Submitted to IESG for Publication May 2015
Consensus Yes
Document shepherd Loa Andersson
Shepherd write-up Show (last changed 2014-12-04)
IESG IESG state RFC 7552 (Proposed Standard)
Telechat date
Responsible AD Deborah Brungard
Send notices to mpls-chairs@ietf.org, draft-ietf-mpls-ldp-ipv6@ietf.org, draft-ietf-mpls-ldp-ipv6.ad@ietf.org, draft-ietf-mpls-ldp-ipv6.shepherd@ietf.org, loa@pi.nu, vishwas@ionosnetworks.com
IANA IANA review state Version Changed - Review Needed
IANA action state RFC-Ed-Ack
Internet Engineering Task Force (IETF)                          R. Asati
Request for Comments: 7552                                  C. Pignataro
Updates: 5036, 6720                                              K. Raza
Category: Standards Track                                          Cisco
ISSN: 2070-1721                                                V. Manral
                                                          Ionos Networks
                                                              R. Papneja
                                                                  Huawei
                                                               June 2015

                        Updates to LDP for IPv6

Abstract

   The Label Distribution Protocol (LDP) specification defines
   procedures to exchange label bindings over either IPv4 or IPv6
   networks, or both.  This document corrects and clarifies the LDP
   behavior when an IPv6 network is used (with or without IPv4).  This
   document updates RFCs 5036 and 6720.

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/rfc7552.

Asati, et al.                Standards Track                    [Page 1]
RFC 7552                 Updates to LDP for IPv6               June 2015

Copyright Notice

   Copyright (c) 2015 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
   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.

Asati, et al.                Standards Track                    [Page 2]
RFC 7552                 Updates to LDP for IPv6               June 2015

Table of Contents

   1. Introduction ....................................................4
      1.1. Topology Scenarios for Dual-Stack Environment ..............5
      1.2. Single-Hop vs. Multi-Hop LDP Peering .......................6
   2. Specification Language ..........................................6
   3. LSP Mapping .....................................................7
   4. LDP Identifiers .................................................8
   5. Neighbor Discovery ..............................................8
      5.1. Basic Discovery Mechanism ..................................8
           5.1.1. Maintaining Hello Adjacencies .......................9
      5.2. Extended Discovery Mechanism ..............................10
   6. LDP Session Establishment and Maintenance ......................10
      6.1. Transport Connection Establishment ........................10
           6.1.1. Dual-Stack: Transport Connection Preference
                  and Role of an LSR .................................12
      6.2. LDP Session Maintenance ...................................14
   7. Binding Distribution ...........................................15
      7.1. Address Distribution ......................................15
      7.2. Label Distribution ........................................16
   8. LDP Identifiers and Duplicate Next-Hop Addresses ...............17
   9. LDP TTL Security ...............................................18
   10. IANA Considerations ...........................................18
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