LDP Downstream-on-Demand in Seamless MPLS
RFC 7032
Document | Type | RFC - Proposed Standard (October 2013; No errata) | |
---|---|---|---|
Authors | Thomas Beckhaus , Bruno Decraene , Kishore Tiruveedhula , Maciek Konstantynowicz , Luca Martini | ||
Last updated | 2018-12-20 | ||
Replaces | draft-beckhaus-ldp-dod | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | Submitted to IESG for Publication | |
Document shepherd | Loa Andersson | ||
Shepherd write-up | Show (last changed 2013-02-28) | ||
IESG | IESG state | RFC 7032 (Proposed Standard) | |
Action Holders |
(None)
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Consensus Boilerplate | Yes | ||
Telechat date | |||
Responsible AD | Adrian Farrel | ||
IESG note | Loa Andersson (loa@pi.nu) is the document shepherd | ||
Send notices to | (None) | ||
IANA | IANA review state | IANA OK - Actions Needed | |
IANA action state | RFC-Ed-Ack |
Internet Engineering Task Force (IETF) T. Beckhaus, Ed. Request for Comments: 7032 Deutsche Telekom AG Category: Standards Track B. Decraene ISSN: 2070-1721 Orange K. Tiruveedhula Juniper Networks M. Konstantynowicz, Ed. L. Martini Cisco Systems, Inc. October 2013 LDP Downstream-on-Demand in Seamless MPLS Abstract Seamless MPLS design enables a single IP/MPLS network to scale over core, metro, and access parts of a large packet network infrastructure using standardized IP/MPLS protocols. One of the key goals of Seamless MPLS is to meet requirements specific to access networks including high number of devices, device position in network topology, and compute and memory constraints that limit the amount of state access devices can hold. This can be achieved with LDP Downstream-on-Demand (DoD) label advertisement. This document describes LDP DoD use cases and lists required LDP DoD procedures in the context of Seamless MPLS design. In addition, a new optional TLV type in the LDP Label Request message is defined for fast-up convergence. 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/rfc7032. Beckhaus, et al. Standards Track [Page 1] RFC 7032 LDP DoD October 2013 Copyright Notice Copyright (c) 2013 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. Beckhaus, et al. Standards Track [Page 2] RFC 7032 LDP DoD October 2013 Table of Contents 1. Introduction ....................................................4 2. Reference Topologies ............................................6 2.1. Access Topologies with Static Routing ......................6 2.2. Access Topologies with Access IGP .........................10 3. LDP DoD Use Cases ..............................................11 3.1. Initial Network Setup .....................................12 3.1.1. AN with Static Routing .............................12 3.1.2. AN with Access IGP .................................13 3.2. Service Provisioning and Activation .......................14 3.3. Service Changes and Decommissioning .......................16 3.4. Service Failure ...........................................17 3.5. Network Transport Failure .................................17 3.5.1. General Notes ......................................17 3.5.2. AN Failure .........................................18 3.5.3. AN/AGN Link Failure ................................19 3.5.4. AGN Failure ........................................20 3.5.5. AGN Network-Side Reachability Failure ..............20 4. LDP DoD Procedures .............................................20 4.1. LDP Label Distribution Control and Retention Modes ........21 4.2. LDP DoD Session Negotiation ...............................23 4.3. Label Request Procedures ..................................23 4.3.1. Access LSR/ABR Label Request .......................23 4.3.2. Label Request Retry ................................24 4.4. Label Withdraw ............................................25 4.5. Label Release .............................................26Show full document text