MPLS Working Group P. Dutta Internet-Draft M. Aissaoui Intended status: Standards Track Alcatel-Lucent Expires: October 7, 2012 April 05, 2012 LDP Version 2 draft-pdutta-mpls-ldp-v2-00 Abstract The Label Distribution Protocol (LDP) is a protocol defined for distributing labels for Multi-Protocol Label Switching (MPLS) and its procedures are defined in [RFC5036] . LDP has been one of the most deployed MPLS signaling protocols. [RFC5036] defines LDP version 1 and this document introduces LDP version 2 to full-fill various operational needs when LDP is deployed for IPV6 networks. LDP version 1 procedures can support IPV6 Label Switch Path (LSP) setup and this document enhances those procedures in Version 2. Requirements Language 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]. Status of this Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at http://datatracker.ietf.org/drafts/current/. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." This Internet-Draft will expire on October 7, 2012. Copyright Notice Copyright (c) 2012 IETF Trust and the persons identified as the document authors. All rights reserved. Dutta & Aissaoui Expires October 7, 2012 [Page 1] Internet-Draft LDP Version 2 April 2012 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. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. LDP Version 2 Identifier . . . . . . . . . . . . . . . . . . . 4 3. Procedures for Version 2 . . . . . . . . . . . . . . . . . . . 5 4. Applicability . . . . . . . . . . . . . . . . . . . . . . . . . 5 5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 5 6. Security Considerations . . . . . . . . . . . . . . . . . . . . 5 7. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 5 8. References . . . . . . . . . . . . . . . . . . . . . . . . . . 5 8.1. Normative References . . . . . . . . . . . . . . . . . . . 5 8.2. Informative References . . . . . . . . . . . . . . . . . . 6 Appendix A. An Appendix . . . . . . . . . . . . . . . . . . . . . 6 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 6 Dutta & Aissaoui Expires October 7, 2012 [Page 2] Internet-Draft LDP Version 2 April 2012 1. Introduction The Multi-Protocol Label Switching (MPLS) architecture is described in [RFC3031]. Label Distribution Protocol (LDP) is a signaling protocol for setup and maintenance of MPLS LSPs (Label Switched Paths) and the protocol specification is defined in [RFC5036]. [RFC5036] defines the LDP Version 1 and all its related procedures. Two Label Switched Routers (LSR) that use LDP to exchange label/FEC mapping information are known as "LDP Peers" with respect to that information, and we speak of there being an "LDP Session" between them. A single LDP session allows each peer to learn the other's label mappings. Each LSR is indentified by an LDP identifier. In LDP Version 1, an LDP Identifier is a six octet quantity used to identify an LSR label space. The 4 octets identify the LSR and is a globally unique value which acts like as a 32-bit router Id assigned to the LSR. The last two octets identify a specific label space within the LSR. The last two octets of LDP Indentifers for platform- wide label spaces are always both zero. This document uses the following representation for LDP Indentifiers: :