LDP Capabilities
RFC 5561
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RFC - Proposed Standard
(July 2009; No errata)
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Last updated |
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2015-10-14
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Replaces |
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draft-thomas-mpls-ldp-capabilities
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IETF
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plain text
pdf
html
bibtex
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WG state
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WG Document
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Document shepherd |
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No shepherd assigned
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IESG state |
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RFC 5561 (Proposed Standard)
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Consensus Boilerplate |
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Unknown
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Telechat date |
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Responsible AD |
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Ross Callon
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Send notices to |
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(None)
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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
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