Application-Aware Targeted LDP
RFC 8223
Document | Type |
RFC - Proposed Standard
(August 2017; Errata)
Updates RFC 7473
|
|
---|---|---|---|
Authors | Santosh Esale , Raveendra Torvi , Luay Jalil , Uma Chunduri , Kamran Raza | ||
Last updated | 2018-12-28 | ||
Replaces | draft-esale-mpls-app-aware-tldp | ||
Stream | Internent Engineering Task Force (IETF) | ||
Formats | plain text html pdf htmlized (tools) htmlized bibtex | ||
Reviews | |||
Stream | WG state | Submitted to IESG for Publication | |
Document shepherd | Loa Andersson | ||
Shepherd write-up | Show (last changed 2016-07-17) | ||
IESG | IESG state | RFC 8223 (Proposed Standard) | |
Action Holders |
(None)
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||
Consensus Boilerplate | Yes | ||
Telechat date | |||
Responsible AD | Deborah Brungard | ||
Send notices to | (None) | ||
IANA | IANA review state | Version Changed - Review Needed | |
IANA action state | RFC-Ed-Ack |
Internet Engineering Task Force (IETF) S. Esale Request for Comments: 8223 R. Torvi Updates: 7473 Juniper Networks Category: Standards Track L. Jalil ISSN: 2070-1721 Verizon U. Chunduri Huawei K. Raza Cisco Systems, Inc. August 2017 Application-Aware Targeted LDP Abstract Recent Targeted Label Distribution Protocol (tLDP) applications, such as remote Loop-Free Alternates (LFAs) and BGP auto-discovered pseudowires, may automatically establish a tLDP session with any Label Switching Router (LSR) in a network. The initiating LSR has information about the targeted applications to administratively control initiation of the session. However, the responding LSR has no such information to control acceptance of this session. This document defines a mechanism to advertise and negotiate the Targeted Application Capability (TAC) during LDP session initialization. As the responding LSR becomes aware of targeted applications, it may establish a limited number of tLDP sessions for certain applications. In addition, each targeted application is mapped to LDP Forwarding Equivalence Class (FEC) elements to advertise only necessary LDP FEC label bindings over the session. This document updates RFC 7473 for enabling advertisement of LDP FEC label bindings over the session. 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 7841. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at https://www.rfc-editor.org/info/rfc8223. Esale, et al. Standards Track [Page 1] RFC 8223 Application-Aware tLDP August 2017 Copyright Notice Copyright (c) 2017 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 (https://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 1.1. Conventions Used in This Document ..........................4 1.2. Terminology ................................................4 2. Targeted Application Capability .................................5 2.1. Encoding ...................................................5 2.2. Procedures .................................................5 2.3. LDP Message Procedures .....................................8 2.3.1. Initialization Message ..............................8 2.3.2. Capability Message ..................................8 3. Targeted Application FEC Advertisement Procedures ...............9 4. Interaction of Targeted Application Capabilities and State Advertisement Control Capabilities .............................10 5. Use Cases ......................................................12 5.1. Remote LFA Automatic Targeted Session .....................12 5.2. FEC 129 Auto-discovery Targeted Session ...................13 5.3. LDP over RSVP and Remote LFA Targeted Session .............13 5.4. mLDP Node Protection Targeted Session .....................13 6. Security Considerations ........................................14 7. IANA Considerations ............................................14 8. References .....................................................15 8.1. Normative References ......................................15 8.2. Informative References ....................................16 Acknowledgments ...................................................17 Contributors ......................................................17Show full document text