LDP Extensions for Multi-Topology
RFC 7307

 
Document Type RFC - Proposed Standard (July 2014; No errata)
Last updated 2014-07-22
Replaces draft-zhao-mpls-ldp-multi-topology
Stream IETF
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Stream WG state Submitted to IESG for Publication
Consensus Yes
Document shepherd Loa Andersson
Shepherd write-up Show (last changed 2014-03-18)
IESG IESG state RFC 7307 (Proposed Standard)
Telechat date
Responsible AD Adrian Farrel
IESG note Loa Andersson <loa@pi.nu> is the document shepherd
Send notices to mpls-chairs@ietf.org, draft-ietf-mpls-ldp-multi-topology@ietf.org
IANA IANA review state Version Changed - Review Needed
IANA action state RFC-Ed-Ack
Internet Engineering Task Force (IETF)                           Q. Zhao
Request for Comments: 7307                             Huawei Technology
Category: Standards Track                                        K. Raza
ISSN: 2070-1721                                                  C. Zhou
                                                           Cisco Systems
                                                                 L. Fang
                                                               Microsoft
                                                                   L. Li
                                                            China Mobile
                                                                 D. King
                                                      Old Dog Consulting
                                                               July 2014

                   LDP Extensions for Multi-Topology

Abstract

   Multi-Topology (MT) routing is supported in IP networks with the use
   of MT-aware IGPs.  In order to provide MT routing within
   Multiprotocol Label Switching (MPLS) Label Distribution Protocol
   (LDP) networks, new extensions are required.

   This document describes the LDP protocol extensions required to
   support MT routing in an MPLS environment.

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/rfc7307.

Zhao, et al.                 Standards Track                    [Page 1]
RFC 7307              LDP Multi-Topology Extensions            July 2014

Copyright Notice

   Copyright (c) 2014 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.

Zhao, et al.                 Standards Track                    [Page 2]
RFC 7307              LDP Multi-Topology Extensions            July 2014

Table of Contents

   1. Introduction ....................................................4
   2. Terminology .....................................................4
   3. Signaling Extensions ............................................5
      3.1. Topology-Scoped Forwarding Equivalence Class (FEC) .........5
      3.2. New Address Families: MT IP ................................5
      3.3. LDP FEC Elements with MT IP AF .............................6
      3.4. IGP MT-ID Mapping and Translation ..........................7
      3.5. LDP MT Capability Advertisement ............................7
           3.5.1. Protocol Extension ..................................7
           3.5.2. Procedures ..........................................9
      3.6. Label Spaces ..............................................10
      3.7. Reserved MT-ID Values .....................................10
   4. MT Applicability on FEC-Based Features .........................10
      4.1. Typed Wildcard FEC Element ................................10
      4.2. Signaling LDP Label Advertisement Completion ..............11
      4.3. LSP Ping ..................................................11
           4.3.1. New FEC Sub-Types ..................................11
           4.3.2. MT LDP IPv4 FEC Sub-TLV ............................12
           4.3.3. MT LDP IPv6 FEC Sub-TLV ............................13
           4.3.4. Operation Considerations ...........................13
   5. Error Handling .................................................14
      5.1. MT Error Notification for Invalid Topology ID .............14
   6. Backwards Compatibility ........................................14
   7. MPLS Forwarding in MT ..........................................14
   8. Security Considerations ........................................14
   9. IANA Considerations ............................................15
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