LDP Capabilities
RFC 5561
Document | Type | RFC - Proposed Standard (July 2009; No errata) | |
---|---|---|---|
Authors | Bob Thomas , Jean-Louis Le Roux , Shivani Aggarwal , Rahul Aggarwal , Kamran Raza | ||
Last updated | 2015-10-14 | ||
Replaces | draft-thomas-mpls-ldp-capabilities | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | WG Document | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 5561 (Proposed Standard) | |
Action Holders |
(None)
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||
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Ross Callon | ||
Send notices to | (None) |
Network Working Group B. Thomas Request for Comments: 5561 K. Raza Updates: 5036 Cisco Systems, Inc. Category: Standards Track S. Aggarwal R. Aggarwal Juniper Networks JL. Le Roux France Telecom July 2009 LDP Capabilities Abstract A number of enhancements to the Label Distribution Protocol (LDP) have been proposed. Some have been implemented, and some are advancing toward standardization. It is likely that additional enhancements will be proposed in the future. This document defines a mechanism for advertising LDP enhancements at session initialization time, as well as a mechanism to enable and disable enhancements after LDP session establishment. Status of This Memo This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited. Copyright Notice Copyright (c) 2009 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 in effect on the date of publication of this document (http://trustee.ietf.org/license-info). Please review these documents carefully, as they describe your rights and restrictions with respect to this document. 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 Thomas, et al. Standards Track [Page 1] RFC 5561 LDP Capabilities July 2009 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. Table of Contents 1. Introduction ....................................................2 1.1. Conventions Used in This Document ..........................3 2. The LDP Capability Mechanism ....................................3 2.1. Capability Document ........................................4 3. Specifying Capabilities in LDP Messages .........................4 3.1. Backward Compatibility TLVs ................................6 4. Capability Message ..............................................6 5. Note on Terminology .............................................7 6. Procedures for Capability Parameters in Initialization Messages ........................................................7 7. Procedures for Capability Parameters in Capability Messages .....8 8. Extensions to Error Handling ....................................9 9. Dynamic Capability Announcement TLV .............................9 10. Backward Compatibility ........................................10 11. Security Considerations .......................................10 12. IANA Considerations ...........................................11 13. Acknowledgments ...............................................11 14. References ....................................................11 14.1. Normative References .....................................11 14.2. Informative References ...................................11 1. Introduction A number of enhancements to LDP as specified in [RFC5036] have been proposed. These include LDP Graceful Restart [RFC3478], Fault Tolerant LDP [RFC3479], multicast extensions [MLDP], signaling for Layer 2 circuits [RFC4447], a method for learning labels advertised by next-next-hop routers in support of fast reroute node protection [NNHOP], upstream label allocation [UPSTREAM_LDP], and extensions for signaling inter-area Label Switched Paths (LSPs) [RFC5283]. Some have been implemented, and some are advancing toward standardization. It is also likely that additional enhancements will be implemented and deployed in the future.Show full document text